[0] | 1 | //buffer.c: |
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| 2 | |
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[690] | 3 | /* |
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[5381] | 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008-2012 |
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[690] | 5 | * |
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| 6 | * This file is part of libroar a part of RoarAudio, |
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| 7 | * a cross-platform sound system for both, home and professional use. |
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| 8 | * See README for details. |
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| 9 | * |
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| 10 | * This file is free software; you can redistribute it and/or modify |
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| 11 | * it under the terms of the GNU General Public License version 3 |
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| 12 | * as published by the Free Software Foundation. |
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| 13 | * |
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| 14 | * libroar is distributed in the hope that it will be useful, |
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | * GNU General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU General Public License |
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| 20 | * along with this software; see the file COPYING. If not, write to |
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[3517] | 21 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
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| 22 | * Boston, MA 02110-1301, USA. |
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[690] | 23 | * |
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| 24 | * NOTE for everyone want's to change something and send patches: |
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| 25 | * read README and HACKING! There a addition information on |
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| 26 | * the license of this document you need to read before you send |
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| 27 | * any patches. |
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| 28 | * |
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| 29 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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| 30 | * or libpulse*: |
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| 31 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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| 32 | * and are therefore GPL. Because of this it may be illigal to use |
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| 33 | * them with any software that uses libesd, libartsc or libpulse*. |
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| 34 | */ |
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| 35 | |
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[0] | 36 | #include "libroar.h" |
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| 37 | |
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[4516] | 38 | struct roar_buffer_ring { |
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| 39 | size_t read_pos; |
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| 40 | size_t write_pos; |
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| 41 | }; |
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| 42 | |
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| 43 | struct roar_buffer { |
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| 44 | size_t refc; |
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| 45 | size_t len; |
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| 46 | size_t user_len; |
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| 47 | int flags; |
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| 48 | void * data; |
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| 49 | void * user_data; |
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| 50 | union { |
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| 51 | void * vp; |
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| 52 | int32_t i32; |
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| 53 | struct roar_buffer_ring ring; |
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| 54 | } meta; |
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[4901] | 55 | int type; |
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[4516] | 56 | struct roar_buffer * next; |
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| 57 | }; |
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[1215] | 58 | |
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[5011] | 59 | #define _ckbuf_free(m) if ( buf == NULL || (m) ) { roar_err_set(ROAR_ERROR_FAULT); return -1; } |
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[5131] | 60 | #define _ckbuf(m) if ( _ckmem_corruption(buf, (m)) == -1 ) return -1; |
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| 61 | |
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| 62 | // if we use the 'inline' keyword here the program segfaults. why? |
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| 63 | static int _ckmem_corruption(volatile struct roar_buffer * buf, int m) { |
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| 64 | int flags; |
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| 65 | |
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| 66 | ROAR_DBG("_ckmem_corruption(buf=%p) = ?", buf); |
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[5011] | 67 | |
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[5131] | 68 | // we need to recheck here, why? |
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| 69 | // gcc changes the order of the above macros. why? |
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| 70 | // this is a strange world. |
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| 71 | if ( buf == NULL || m ) { |
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| 72 | ROAR_DBG("_ckmem_corruption(buf=%p) = -1 // FAULT", buf); |
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| 73 | roar_err_set(ROAR_ERROR_FAULT); |
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| 74 | return -1; |
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| 75 | } |
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| 76 | |
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| 77 | ROAR_DBG("_ckmem_corruption(buf=%p) = ?", buf); |
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| 78 | |
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| 79 | flags = buf->flags & (ROAR_BUFFER_FLAG_USEABLE|ROAR_BUFFER_FLAG_FREED); |
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[5011] | 80 | |
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[5652] | 81 | ROAR_DBG("_ckmem_corruption(buf=%p{.flags=0x%.4x, ...}) = ?", buf, buf->flags); |
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[5011] | 82 | |
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| 83 | if ( flags == ROAR_BUFFER_FLAG_USEABLE ) { |
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| 84 | // seems ok, continue with next check. |
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| 85 | } else if ( flags == ROAR_BUFFER_FLAG_FREED ) { |
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| 86 | roar_panic(ROAR_FATAL_ERROR_MEMORY_USED_AFTER_FREE, NULL); |
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| 87 | roar_err_set(ROAR_ERROR_FAULT); |
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| 88 | return -1; |
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| 89 | } else { |
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| 90 | roar_panic(ROAR_FATAL_ERROR_MEMORY_CORRUPTION, NULL); |
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| 91 | roar_err_set(ROAR_ERROR_BADCKSUM); |
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| 92 | return -1; |
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| 93 | } |
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| 94 | |
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| 95 | if ( buf->refc == 0 ) { |
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| 96 | roar_panic(ROAR_FATAL_ERROR_MEMORY_CORRUPTION, NULL); |
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[5299] | 97 | roar_err_set(ROAR_ERROR_FAULT); |
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| 98 | return -1; |
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[5011] | 99 | } |
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| 100 | |
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| 101 | return 0; |
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| 102 | } |
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[4905] | 103 | |
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[3764] | 104 | int roar_buffer_new_data (struct roar_buffer ** buf, size_t len, void ** data) { |
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| 105 | void * bufdata; |
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[4905] | 106 | int err; |
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[3764] | 107 | |
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| 108 | if ((bufdata = roar_mm_malloc(len)) == NULL) { |
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[1215] | 109 | return -1; |
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| 110 | } |
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| 111 | |
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[3764] | 112 | if ( roar_buffer_new_no_ma(buf, len, bufdata) == -1 ) { |
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[4905] | 113 | err = roar_error; |
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[3764] | 114 | roar_mm_free(bufdata); |
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[4905] | 115 | roar_err_set(err); |
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[1215] | 116 | return -1; |
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| 117 | } |
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| 118 | |
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| 119 | if ( roar_buffer_set_flag(*buf, ROAR_BUFFER_FLAG_NOFREE, ROAR_BUFFER_RESET) == -1 ) { |
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[4905] | 120 | err = roar_error; |
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[1215] | 121 | roar_buffer_free(*buf); |
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[3764] | 122 | roar_mm_free(bufdata); |
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[4905] | 123 | roar_err_set(err); |
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[1215] | 124 | return -1; |
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| 125 | } |
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| 126 | |
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[3764] | 127 | if ( data != NULL ) |
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| 128 | *data = bufdata; |
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| 129 | |
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[1215] | 130 | return 0; |
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| 131 | } |
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| 132 | |
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| 133 | int roar_buffer_new_no_ma(struct roar_buffer ** buf, size_t len, void * data) { // no internal malloc |
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[0] | 134 | struct roar_buffer * new; |
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| 135 | |
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| 136 | ROAR_DBG("buffer_new(buf=%p, len=%i) = ?", buf, len); |
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| 137 | |
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[5011] | 138 | _ckbuf_free(data == NULL) |
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[1215] | 139 | |
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[2976] | 140 | if ((new = roar_mm_malloc(sizeof(struct roar_buffer))) == NULL) { |
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[0] | 141 | *buf = NULL; |
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| 142 | return -1; |
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| 143 | } |
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| 144 | |
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[4901] | 145 | new->refc = 1; |
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[4522] | 146 | |
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[1215] | 147 | new->data = data; |
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| 148 | |
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[5011] | 149 | new->flags = ROAR_BUFFER_FLAG_NONE|ROAR_BUFFER_FLAG_NOFREE|ROAR_BUFFER_FLAG_USEABLE; |
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[4901] | 150 | new->type = -1; |
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[0] | 151 | |
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| 152 | new->user_data = new->data; |
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| 153 | |
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| 154 | new->next = NULL; |
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| 155 | |
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| 156 | new->len = len; |
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| 157 | new->user_len = len; |
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| 158 | *buf = new; |
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| 159 | |
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| 160 | ROAR_DBG("buffer_new(buf=%p, len=%i): New buffer at %p", buf, len, new); |
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| 161 | |
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| 162 | return 0; |
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| 163 | } |
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| 164 | |
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[4522] | 165 | int roar_buffer_ref (struct roar_buffer * buf) { |
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[4905] | 166 | _ckbuf(0) |
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[4522] | 167 | |
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| 168 | buf->refc++; |
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| 169 | |
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| 170 | return 0; |
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| 171 | } |
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| 172 | |
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| 173 | int roar_buffer_unref (struct roar_buffer * buf) { |
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[5011] | 174 | struct roar_buffer * next, * cur; |
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| 175 | int flags; |
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| 176 | |
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| 177 | ROAR_DBG("roar_buffer_unref(buf=%p) = ?", buf); |
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| 178 | |
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| 179 | _ckbuf_free(0) |
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| 180 | |
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| 181 | ROAR_DBG("roar_buffer_unref(buf=%p) = ?", buf); |
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[0] | 182 | |
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[5348] | 183 | cur = buf; |
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[5011] | 184 | while (cur != NULL) { |
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| 185 | flags = cur->flags & (ROAR_BUFFER_FLAG_USEABLE|ROAR_BUFFER_FLAG_FREED); |
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| 186 | if ( flags == ROAR_BUFFER_FLAG_FREED ) { |
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| 187 | roar_panic(ROAR_FATAL_ERROR_MEMORY_DOUBLE_FREE, NULL); |
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| 188 | } |
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| 189 | |
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[5348] | 190 | _ckmem_corruption(cur, 0); |
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[5011] | 191 | |
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[5348] | 192 | if ( cur->refc == 0 ) { |
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[5651] | 193 | ROAR_WARN("roar_buffer_unref(buf=%p): Ref counter for buffer at %p is wrong. assuming one.", cur, cur); |
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[5348] | 194 | cur->refc = 1; |
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| 195 | roar_panic(ROAR_FATAL_ERROR_MEMORY_CORRUPTION, NULL); |
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| 196 | } else if ( cur->refc > 1 ) { |
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| 197 | cur->refc--; |
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| 198 | return 0; |
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| 199 | } |
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| 200 | |
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| 201 | ROAR_DBG("roar_buffer_unref(buf=%p) = ?", buf); |
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[5011] | 202 | |
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| 203 | if ( roar_buffer_get_flag(cur, ROAR_BUFFER_FLAG_NOFREE) != 1 ) |
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| 204 | roar_mm_free(cur->data); |
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| 205 | |
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| 206 | cur->flags = ROAR_BUFFER_FLAG_FREED; |
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| 207 | next = cur->next; |
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| 208 | roar_mm_free(cur); |
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| 209 | cur = next; |
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| 210 | } |
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| 211 | |
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| 212 | ROAR_DBG("roar_buffer_unref(buf=%p) = 0", buf); |
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[0] | 213 | return 0; |
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| 214 | } |
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| 215 | |
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| 216 | int roar_buffer_delete (struct roar_buffer * buf, struct roar_buffer ** next) { |
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| 217 | if ( buf == NULL ) { |
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| 218 | if ( next != NULL ) |
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| 219 | *next = NULL; |
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[4905] | 220 | roar_err_set(ROAR_ERROR_FAULT); |
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[0] | 221 | return -1; |
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| 222 | } |
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| 223 | |
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[5348] | 224 | ROAR_DBG("roar_buffer_delete(buf=%p, next=%p) = ?", buf, next); |
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[0] | 225 | |
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[5348] | 226 | if ( next != NULL ) { |
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| 227 | *next = buf; |
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| 228 | return roar_buffer_next(next); |
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| 229 | } else { |
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| 230 | return roar_buffer_unref(buf); |
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| 231 | } |
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| 232 | } |
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| 233 | |
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| 234 | int roar_buffer_next (struct roar_buffer ** buf) { |
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| 235 | struct roar_buffer * ret; |
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[0] | 236 | |
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[5348] | 237 | if ( buf == NULL || *buf == NULL ) { |
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| 238 | roar_err_set(ROAR_ERROR_FAULT); |
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| 239 | } |
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| 240 | |
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| 241 | ret = (*buf)->next; |
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[2976] | 242 | |
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[5348] | 243 | if ( ret != NULL ) |
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| 244 | roar_buffer_ref(ret); |
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[0] | 245 | |
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[5348] | 246 | roar_buffer_unref(*buf); |
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| 247 | |
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| 248 | *buf = ret; |
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| 249 | |
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[0] | 250 | return 0; |
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| 251 | } |
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| 252 | |
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| 253 | int roar_buffer_add (struct roar_buffer * buf, struct roar_buffer * next) { |
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[5348] | 254 | if ( roar_buffer_ref(next) == -1 ) |
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| 255 | return -1; |
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[5299] | 256 | return roar_buffer_moveinto(buf, &next); |
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[5298] | 257 | } |
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| 258 | |
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[5299] | 259 | int roar_buffer_moveinto (struct roar_buffer * buf, struct roar_buffer ** next) { |
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[1953] | 260 | unsigned int deep = 0; |
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| 261 | |
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[5299] | 262 | _ckbuf(next == NULL || _ckmem_corruption(*next, 0)) |
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[0] | 263 | |
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| 264 | ROAR_DBG("buffer_add(buf=%p, next=%p) = ?", buf, next); |
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[5299] | 265 | ROAR_DBG("buffer_add(buf=%p, next=%p): *next=%p", buf, next, *next); |
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[0] | 266 | |
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[4905] | 267 | if ( buf->flags & ROAR_BUFFER_FLAG_RING ) { |
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| 268 | roar_err_set(ROAR_ERROR_INVAL); |
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[3020] | 269 | return -1; |
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[4905] | 270 | } |
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[3020] | 271 | |
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[5299] | 272 | if ( buf == *next ) { |
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[1953] | 273 | ROAR_ERR("buffer_add(*): both pointer are of the same destination, This is a error in the application"); |
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[4905] | 274 | roar_err_set(ROAR_ERROR_INVAL); |
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[1953] | 275 | return -1; |
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| 276 | } |
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| 277 | |
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[0] | 278 | while ( buf->next != NULL ) { |
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[302] | 279 | ROAR_DBG("buffer_add(*): buf=%p, next=%p (len=%i)", buf, buf->next, buf->user_len); |
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[0] | 280 | // ROAR_DBG("buffer_add(): buf=%p, buf->next=%p", buf, buf->next); |
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| 281 | buf = buf->next; |
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[1953] | 282 | deep++; |
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| 283 | |
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[5299] | 284 | if ( buf == *next ) { |
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[1953] | 285 | ROAR_ERR("buffer_add(*): Can not add buffer: loop detected at deep %u. This is a error in the application", deep); |
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[4905] | 286 | // why don't we return here? |
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[1953] | 287 | } |
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[0] | 288 | } |
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| 289 | |
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[5299] | 290 | buf->next = *next; |
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[0] | 291 | |
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[1953] | 292 | ROAR_DBG("buffer_add(*): adding buffer at deep %u", deep); |
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| 293 | |
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[5299] | 294 | *next = NULL; |
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| 295 | |
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[0] | 296 | return 0; |
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| 297 | } |
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| 298 | |
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[5603] | 299 | int roar_buffer_moveintoqueue(struct roar_buffer ** buf, struct roar_buffer ** next) { |
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| 300 | if ( buf == NULL || next == NULL ) { |
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| 301 | roar_err_set(ROAR_ERROR_FAULT); |
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| 302 | return -1; |
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| 303 | } |
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| 304 | |
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| 305 | if ( *buf == NULL ) { |
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| 306 | *buf = *next; |
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| 307 | *next = NULL; |
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| 308 | return 0; |
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| 309 | } else { |
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| 310 | return roar_buffer_moveinto(*buf, next); |
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| 311 | } |
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| 312 | } |
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| 313 | |
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[0] | 314 | int roar_buffer_get_next (struct roar_buffer * buf, struct roar_buffer ** next) { |
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[4905] | 315 | _ckbuf(0) |
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[0] | 316 | |
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| 317 | *next = buf->next; |
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| 318 | |
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[5348] | 319 | return roar_buffer_ref(*next); |
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[0] | 320 | } |
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| 321 | |
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[3020] | 322 | int roar_buffer_ring_new (struct roar_buffer ** buf, size_t len, int free_running) { |
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| 323 | struct roar_buffer * n; |
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| 324 | |
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[5011] | 325 | _ckbuf_free(0) |
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[4905] | 326 | |
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| 327 | if ( len == 0 ) { |
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| 328 | roar_err_set(ROAR_ERROR_RANGE); |
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[3020] | 329 | return -1; |
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[4905] | 330 | } |
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[3020] | 331 | |
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| 332 | // just to be sure: |
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| 333 | *buf = NULL; |
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| 334 | |
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| 335 | if ( roar_buffer_new(&n, len) == -1 ) |
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| 336 | return -1; |
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| 337 | |
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| 338 | n->flags |= ROAR_BUFFER_FLAG_RING; |
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| 339 | |
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| 340 | if ( free_running ) |
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| 341 | n->flags |= ROAR_BUFFER_FLAG_FREE_RUNNING; |
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| 342 | |
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| 343 | n->meta.ring.read_pos = 0; |
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| 344 | n->meta.ring.write_pos = 0; |
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| 345 | |
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| 346 | memset(n->data, 0, n->len); |
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| 347 | |
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| 348 | *buf = n; |
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| 349 | |
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| 350 | return 0; |
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| 351 | } |
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| 352 | |
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[0] | 353 | int roar_buffer_get_data (struct roar_buffer * buf, void ** data) { |
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[5352] | 354 | _ckbuf(data == NULL) |
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| 355 | |
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| 356 | *data = buf->user_data; |
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| 357 | |
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| 358 | return 0; |
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| 359 | } |
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| 360 | |
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| 361 | int roar_buffer_get_datalen(struct roar_buffer * buf, void ** data, size_t * len) { |
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[4905] | 362 | _ckbuf(0) |
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[0] | 363 | |
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[5352] | 364 | if ( data != NULL ) |
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| 365 | *data = buf->user_data; |
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| 366 | if ( len != NULL ) |
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| 367 | *len = buf->user_len; |
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[0] | 368 | |
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| 369 | return 0; |
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| 370 | } |
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| 371 | |
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| 372 | int roar_buffer_set_offset (struct roar_buffer * buf, size_t off) { |
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[4905] | 373 | _ckbuf(0) |
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| 374 | |
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| 375 | if ( off > buf->user_len ) { |
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| 376 | roar_err_set(ROAR_ERROR_RANGE); |
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[0] | 377 | return -1; |
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[4905] | 378 | } |
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[0] | 379 | |
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| 380 | buf->user_len -= off; |
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| 381 | buf->user_data += off; |
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| 382 | |
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| 383 | return 0; |
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| 384 | } |
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| 385 | |
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[904] | 386 | int roar_buffer_shift_out (struct roar_buffer ** buf, void * data, size_t * len) { |
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| 387 | size_t todo, cl; |
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| 388 | struct roar_buffer * cur; |
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| 389 | void * cd; |
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| 390 | |
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[5011] | 391 | _ckbuf_free(len == NULL || data == NULL); |
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[904] | 392 | |
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[996] | 393 | if ( *buf == NULL ) { |
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| 394 | ROAR_DBG("roar_buffer_shift_out(buf=%p, data=%p, len={%lu}) = -1 // Invalid pointer to buffer ring", buf, data, (unsigned long)len); |
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[4905] | 395 | roar_err_set(ROAR_ERROR_FAULT); |
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[904] | 396 | return -1; |
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[996] | 397 | } |
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[904] | 398 | |
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| 399 | todo = *len; |
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| 400 | cur = *buf; |
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| 401 | |
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| 402 | *len = 0; |
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| 403 | |
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[2066] | 404 | while (todo && cur != NULL) { |
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[904] | 405 | ROAR_DBG("roar_buffer_shift_out(*): todo=%u, cur=%p", (unsigned int) todo, cur); |
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| 406 | |
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[5131] | 407 | _ckmem_corruption(cur, 0); |
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[5013] | 408 | |
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[904] | 409 | if ( roar_buffer_get_len(cur, &cl) == -1 ) |
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| 410 | return -1; |
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| 411 | |
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| 412 | if ( cl > todo ) { |
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| 413 | if ( roar_buffer_get_data(cur, &cd) == -1 ) |
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| 414 | return -1; |
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| 415 | |
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| 416 | cl = todo; |
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| 417 | |
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| 418 | memcpy(data, cd, cl); |
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| 419 | todo -= cl; |
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| 420 | data += cl; |
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| 421 | *len += cl; |
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| 422 | |
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| 423 | if ( roar_buffer_set_offset(cur, cl) == -1 ) |
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| 424 | return -1; |
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| 425 | } else { |
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| 426 | if ( roar_buffer_get_data(cur, &cd) == -1 ) |
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| 427 | return -1; |
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| 428 | |
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| 429 | memcpy(data, cd, cl); |
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| 430 | todo -= cl; |
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| 431 | data += cl; |
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| 432 | *len += cl; |
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| 433 | |
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| 434 | if ( roar_buffer_next(&cur) == -1 ) |
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| 435 | return -1; |
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| 436 | } |
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| 437 | |
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| 438 | /* |
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| 439 | if ( cur == NULL ) |
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| 440 | break; |
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| 441 | */ |
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| 442 | } |
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| 443 | |
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| 444 | *buf = cur; |
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| 445 | |
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[996] | 446 | return 0; |
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[904] | 447 | } |
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| 448 | |
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[0] | 449 | int roar_buffer_set_meta (struct roar_buffer * buf, void * meta) { |
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[4905] | 450 | _ckbuf(0) |
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[0] | 451 | |
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[2333] | 452 | buf->meta.vp = meta; |
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[0] | 453 | |
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| 454 | return 0; |
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| 455 | } |
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| 456 | |
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| 457 | int roar_buffer_get_meta (struct roar_buffer * buf, void ** meta) { |
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[4905] | 458 | _ckbuf(meta == NULL) |
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[2333] | 459 | |
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| 460 | *meta = buf->meta.vp; |
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| 461 | |
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| 462 | return 0; |
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| 463 | } |
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| 464 | |
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| 465 | int roar_buffer_set_meta_i32(struct roar_buffer * buf, int32_t meta) { |
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[4905] | 466 | _ckbuf(0) |
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[0] | 467 | |
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[2333] | 468 | buf->meta.i32 = meta; |
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| 469 | |
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| 470 | return 0; |
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| 471 | } |
---|
| 472 | |
---|
| 473 | int roar_buffer_get_meta_i32(struct roar_buffer * buf, int32_t * meta) { |
---|
[4905] | 474 | _ckbuf(meta == NULL) |
---|
[2333] | 475 | |
---|
| 476 | *meta = buf->meta.i32; |
---|
[0] | 477 | |
---|
| 478 | return 0; |
---|
| 479 | } |
---|
| 480 | |
---|
[4901] | 481 | int roar_buffer_set_type (struct roar_buffer * buf, int type) { |
---|
[4905] | 482 | _ckbuf(0) |
---|
[4901] | 483 | |
---|
[4903] | 484 | switch (type) { |
---|
| 485 | case ROAR_VIO_DFT_RAW: |
---|
| 486 | case ROAR_VIO_DFT_PACKET: |
---|
| 487 | case ROAR_VIO_DFT_UNFRAMED: |
---|
[4988] | 488 | case ROAR_VIO_DFT_OGG_PACKET: |
---|
| 489 | case ROAR_VIO_DFT_OGG_PAGE: |
---|
[4903] | 490 | break; |
---|
| 491 | default: |
---|
[4905] | 492 | roar_err_set(ROAR_ERROR_NOTSUP); |
---|
[4903] | 493 | return -1; |
---|
| 494 | } |
---|
| 495 | |
---|
[4901] | 496 | buf->type = type; |
---|
| 497 | |
---|
| 498 | return 0; |
---|
| 499 | } |
---|
| 500 | |
---|
| 501 | int roar_buffer_get_type (struct roar_buffer * buf, int * type) { |
---|
[4905] | 502 | _ckbuf(type == NULL) |
---|
[4901] | 503 | |
---|
| 504 | *type = buf->type; |
---|
| 505 | |
---|
| 506 | return 0; |
---|
| 507 | } |
---|
| 508 | |
---|
[0] | 509 | int roar_buffer_set_len (struct roar_buffer * buf, size_t len) { |
---|
[2334] | 510 | size_t totlen; |
---|
| 511 | void * newbuf; |
---|
[5647] | 512 | size_t true_len; |
---|
| 513 | |
---|
| 514 | ROAR_DBG("roar_buffer_set_len(buf=%p, len=%lu) = ?", buf, (long unsigned int)len); |
---|
[2334] | 515 | |
---|
[4905] | 516 | _ckbuf(0) |
---|
[0] | 517 | |
---|
[5647] | 518 | ROAR_DBG("roar_buffer_set_len(buf=%p, len=%lu) = ?", buf, (long unsigned int)len); |
---|
| 519 | |
---|
[5637] | 520 | // handle special case where user length is zero: |
---|
[3032] | 521 | if ( len && !buf->user_len ) { |
---|
| 522 | buf->user_data = buf->data; |
---|
| 523 | buf->user_len = buf->len; |
---|
| 524 | } |
---|
| 525 | |
---|
[5647] | 526 | ROAR_DBG("roar_buffer_set_len(buf=%p, len=%lu) = ?", buf, (long unsigned int)len); |
---|
| 527 | |
---|
| 528 | // calculate the true length of our buffer starting at buf->user_data. |
---|
| 529 | true_len = buf->len - (buf->user_data - buf->data); |
---|
| 530 | |
---|
| 531 | if ( len > true_len ) { |
---|
| 532 | ROAR_DBG("roar_buffer_set_len(buf=%p, len=%lu): We need to enlarge the buffer.", buf, (long unsigned int)len); |
---|
| 533 | |
---|
[3021] | 534 | // we can only enlage a buffer if it's one of our own memory segments |
---|
[4905] | 535 | if ( buf->flags & ROAR_BUFFER_FLAG_NOFREE ) { |
---|
[5647] | 536 | ROAR_DBG("roar_buffer_set_len(buf=%p, len=%lu) = -1 //error=NOTSUP", buf, (long unsigned int)len); |
---|
[4905] | 537 | roar_err_set(ROAR_ERROR_NOTSUP); |
---|
[3021] | 538 | return -1; |
---|
[4905] | 539 | } |
---|
[3021] | 540 | |
---|
[4989] | 541 | totlen = (buf->len - buf->user_len) + len; |
---|
[3021] | 542 | newbuf = roar_mm_realloc(buf->data, totlen); |
---|
[2334] | 543 | if ( newbuf == NULL ) |
---|
| 544 | return -1; |
---|
| 545 | |
---|
[4988] | 546 | buf->user_data = newbuf + (buf->user_data - buf->data); |
---|
[4989] | 547 | buf->user_len = len; |
---|
[2334] | 548 | buf->data = newbuf; |
---|
[4989] | 549 | buf->len = totlen; |
---|
[2334] | 550 | } else { |
---|
[5647] | 551 | ROAR_DBG("roar_buffer_set_len(buf=%p, len=%lu): No need to enlarge the buffer.", buf, (long unsigned int)len); |
---|
[2334] | 552 | buf->user_len = len; |
---|
| 553 | } |
---|
[0] | 554 | |
---|
[5647] | 555 | ROAR_DBG("roar_buffer_set_len(buf=%p, len=%lu) = 0", buf, (long unsigned int)len); |
---|
[0] | 556 | return 0; |
---|
| 557 | } |
---|
| 558 | |
---|
| 559 | int roar_buffer_get_len (struct roar_buffer * buf, size_t * len) { |
---|
[4905] | 560 | _ckbuf(0) |
---|
[0] | 561 | |
---|
| 562 | *len = buf->user_len; |
---|
| 563 | |
---|
| 564 | return 0; |
---|
| 565 | } |
---|
| 566 | |
---|
[1215] | 567 | int roar_buffer_set_flag (struct roar_buffer * buf, int flag, int reset) { |
---|
[4905] | 568 | _ckbuf(0) |
---|
[1215] | 569 | |
---|
| 570 | buf->flags |= flag; |
---|
| 571 | |
---|
| 572 | if ( reset ) |
---|
| 573 | buf->flags -= flag; |
---|
| 574 | |
---|
| 575 | return 0; |
---|
| 576 | } |
---|
| 577 | |
---|
| 578 | int roar_buffer_get_flag (struct roar_buffer * buf, int flag) { |
---|
[4905] | 579 | _ckbuf(0) |
---|
[1215] | 580 | |
---|
| 581 | return buf->flags & flag; |
---|
| 582 | } |
---|
| 583 | |
---|
[46] | 584 | int roar_buffer_duplicate (struct roar_buffer * buf, struct roar_buffer ** copy) { |
---|
| 585 | struct roar_buffer * cur = buf; |
---|
| 586 | struct roar_buffer * new; |
---|
[48] | 587 | void * od, * nd; |
---|
[4905] | 588 | int err; |
---|
| 589 | |
---|
| 590 | _ckbuf(copy == NULL) |
---|
[46] | 591 | |
---|
| 592 | *copy = NULL; |
---|
| 593 | |
---|
[5111] | 594 | // TODO: This function does not handle ring buffers. |
---|
| 595 | // FIXME: This function does not error out in case of wrong buffer type in buf. |
---|
| 596 | // TODO: This function does not handle buffer meta data. |
---|
| 597 | |
---|
[4905] | 598 | while (cur != NULL) { |
---|
[46] | 599 | if ( roar_buffer_new(&new, cur->user_len) == -1 ) { |
---|
[4905] | 600 | err = roar_error; |
---|
[46] | 601 | roar_buffer_free(*copy); |
---|
[4905] | 602 | roar_err_set(err); |
---|
[46] | 603 | return -1; |
---|
| 604 | } |
---|
| 605 | |
---|
| 606 | if ( *copy == NULL ) |
---|
| 607 | *copy = new; |
---|
| 608 | |
---|
[5111] | 609 | _LIBROAR_IGNORE_RET(roar_buffer_get_data(cur, &od)); |
---|
| 610 | _LIBROAR_IGNORE_RET(roar_buffer_get_data(new, &nd)); |
---|
[48] | 611 | memcpy(nd, od, cur->user_len); |
---|
| 612 | |
---|
[5300] | 613 | _LIBROAR_IGNORE_RET(roar_buffer_moveinto(*copy, &new)); |
---|
[46] | 614 | |
---|
| 615 | cur = cur->next; |
---|
| 616 | } |
---|
[4905] | 617 | |
---|
[46] | 618 | return 0; |
---|
| 619 | } |
---|
| 620 | |
---|
[7] | 621 | int roar_buffer_ring_stats (struct roar_buffer * buf, struct roar_buffer_stats * stats) { |
---|
[5131] | 622 | ROAR_DBG("roar_buffer_ring_stats(buf=%p, stats=%p) = ?", buf, stats); |
---|
| 623 | |
---|
[4905] | 624 | _ckbuf(0) |
---|
[7] | 625 | |
---|
[5131] | 626 | ROAR_DBG("roar_buffer_ring_stats(buf=%p, stats=%p) = ?", buf, stats); |
---|
| 627 | |
---|
[7] | 628 | stats->parts = 0; |
---|
| 629 | stats->bytes = 0; |
---|
| 630 | stats->memory_usage = 0; |
---|
| 631 | |
---|
[4905] | 632 | while (buf != NULL ) { |
---|
[7] | 633 | stats->parts++; |
---|
| 634 | stats->bytes += buf->user_len; |
---|
| 635 | stats->memory_usage += buf->len + sizeof(struct roar_buffer); |
---|
| 636 | buf = buf->next; |
---|
| 637 | } |
---|
| 638 | |
---|
| 639 | return 0; |
---|
| 640 | } |
---|
| 641 | |
---|
[3020] | 642 | int roar_buffer_ring_read (struct roar_buffer * buf, void * data, size_t * len) { |
---|
[4615] | 643 | struct roar_buffer_ring * ring; |
---|
| 644 | size_t havelen; |
---|
| 645 | size_t done; |
---|
| 646 | size_t tmp; |
---|
| 647 | |
---|
[4905] | 648 | _ckbuf(len == NULL) |
---|
| 649 | |
---|
[3020] | 650 | if ( buf == NULL || len == NULL ) |
---|
| 651 | return -1; |
---|
| 652 | |
---|
[4905] | 653 | if ( data == NULL && *len != 0 ) { |
---|
| 654 | roar_err_set(ROAR_ERROR_FAULT); |
---|
[3020] | 655 | return -1; |
---|
[4905] | 656 | } |
---|
[3020] | 657 | |
---|
[4905] | 658 | if ( !(buf->flags & ROAR_BUFFER_FLAG_RING) ) { |
---|
| 659 | roar_err_set(ROAR_ERROR_TYPEMM); |
---|
[3020] | 660 | return -1; |
---|
[4905] | 661 | } |
---|
[3020] | 662 | |
---|
| 663 | if ( *len == 0 ) |
---|
| 664 | return 0; |
---|
| 665 | |
---|
| 666 | // we may handle this later: |
---|
[4905] | 667 | if ( *len > buf->user_len ) { |
---|
| 668 | roar_err_set(ROAR_ERROR_NOTSUP); |
---|
[3020] | 669 | return -1; |
---|
[4905] | 670 | } |
---|
[3020] | 671 | |
---|
[4615] | 672 | if ( (buf->flags & ROAR_BUFFER_FLAG_FREE_RUNNING) ) { |
---|
| 673 | if ( buf->meta.ring.read_pos >= buf->user_len ) |
---|
| 674 | buf->meta.ring.read_pos -= buf->user_len; |
---|
[3020] | 675 | |
---|
[4615] | 676 | if ( (*len + buf->meta.ring.read_pos) > buf->user_len ) { |
---|
| 677 | // wraped mode: |
---|
| 678 | memcpy(data, buf->user_data+buf->meta.ring.read_pos, buf->user_len - buf->meta.ring.read_pos); |
---|
| 679 | memcpy(data, buf->user_data, *len + buf->meta.ring.read_pos - buf->user_len); |
---|
| 680 | |
---|
| 681 | buf->meta.ring.read_pos += *len; |
---|
| 682 | buf->meta.ring.read_pos -= buf->user_len; |
---|
| 683 | return 0; |
---|
| 684 | } else { |
---|
| 685 | // unwarped mode: |
---|
| 686 | memcpy(data, buf->user_data+buf->meta.ring.read_pos, *len); |
---|
| 687 | buf->meta.ring.read_pos += *len; |
---|
| 688 | return 0; |
---|
| 689 | } |
---|
| 690 | } else { |
---|
| 691 | ring = &(buf->meta.ring); |
---|
| 692 | |
---|
| 693 | if ( ring->read_pos == ring->write_pos ) { |
---|
| 694 | *len = 0; |
---|
| 695 | return 0; |
---|
| 696 | } else if ( ring->read_pos < ring->write_pos ) { |
---|
| 697 | havelen = ring->write_pos - ring->read_pos; |
---|
| 698 | |
---|
| 699 | if ( havelen > *len ) |
---|
| 700 | havelen = *len; |
---|
| 701 | |
---|
| 702 | memcpy(data, buf->user_data+ring->read_pos, havelen); |
---|
| 703 | ring->read_pos += havelen; |
---|
[3020] | 704 | |
---|
[4615] | 705 | *len = havelen; |
---|
| 706 | return 0; |
---|
| 707 | } else { // write_pos < read_pos |
---|
| 708 | done = 0; |
---|
| 709 | |
---|
| 710 | // first pass: use data up to end of buffer |
---|
| 711 | |
---|
| 712 | havelen = buf->user_len - ring->read_pos; |
---|
| 713 | |
---|
| 714 | if ( havelen > *len ) |
---|
| 715 | havelen = *len; |
---|
| 716 | |
---|
| 717 | memcpy(data, buf->user_data+ring->read_pos, havelen); |
---|
| 718 | ring->read_pos += havelen; |
---|
| 719 | |
---|
| 720 | done += havelen; |
---|
| 721 | |
---|
| 722 | if ( ring->read_pos == buf->user_len ) { |
---|
| 723 | ring->read_pos = 0; |
---|
| 724 | } |
---|
| 725 | |
---|
| 726 | // second pass: use data from strat of buffer to write pointer |
---|
| 727 | |
---|
| 728 | if ( *len > done ) { |
---|
| 729 | tmp = *len - done; |
---|
| 730 | if ( roar_buffer_ring_read(buf, data+done, &tmp) == 0 ) { |
---|
| 731 | done += tmp; |
---|
| 732 | } |
---|
| 733 | } |
---|
| 734 | |
---|
| 735 | *len = done; |
---|
| 736 | return 0; |
---|
| 737 | } |
---|
[3020] | 738 | } |
---|
| 739 | |
---|
[4905] | 740 | roar_err_set(ROAR_ERROR_UNKNOWN); |
---|
[3020] | 741 | return -1; |
---|
| 742 | } |
---|
| 743 | |
---|
| 744 | int roar_buffer_ring_write (struct roar_buffer * buf, void * data, size_t * len) { |
---|
[4624] | 745 | struct roar_buffer_ring * ring; |
---|
| 746 | size_t havelen; |
---|
| 747 | size_t done; |
---|
| 748 | size_t tmp; |
---|
| 749 | |
---|
[4625] | 750 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = ?", buf, data, len); |
---|
| 751 | |
---|
[4905] | 752 | _ckbuf(len == NULL) |
---|
[3020] | 753 | |
---|
[4905] | 754 | if ( data == NULL && *len != 0 ) { |
---|
| 755 | roar_err_set(ROAR_ERROR_FAULT); |
---|
[3020] | 756 | return -1; |
---|
[4905] | 757 | } |
---|
[3020] | 758 | |
---|
[4905] | 759 | if ( !(buf->flags & ROAR_BUFFER_FLAG_RING) ) { |
---|
| 760 | roar_err_set(ROAR_ERROR_TYPEMM); |
---|
[3020] | 761 | return -1; |
---|
[4905] | 762 | } |
---|
[3020] | 763 | |
---|
| 764 | if ( *len == 0 ) |
---|
| 765 | return 0; |
---|
| 766 | |
---|
| 767 | // we may handle this later: |
---|
[4905] | 768 | if ( *len > buf->user_len ) { |
---|
| 769 | roar_err_set(ROAR_ERROR_NOTSUP); |
---|
[3020] | 770 | return -1; |
---|
[4905] | 771 | } |
---|
[3020] | 772 | |
---|
[4615] | 773 | if ( (buf->flags & ROAR_BUFFER_FLAG_FREE_RUNNING) ) { |
---|
| 774 | if ( buf->meta.ring.write_pos >= buf->user_len ) |
---|
| 775 | buf->meta.ring.write_pos -= buf->user_len; |
---|
[3020] | 776 | |
---|
[4615] | 777 | if ( (*len + buf->meta.ring.write_pos) > buf->user_len ) { |
---|
| 778 | // wraped mode: |
---|
| 779 | memcpy(buf->user_data+buf->meta.ring.write_pos, data, buf->user_len - buf->meta.ring.write_pos); |
---|
| 780 | memcpy(buf->user_data, data, *len + buf->meta.ring.write_pos - buf->user_len); |
---|
[3020] | 781 | |
---|
[4615] | 782 | buf->meta.ring.write_pos += *len; |
---|
| 783 | buf->meta.ring.write_pos -= buf->user_len; |
---|
| 784 | return 0; |
---|
| 785 | } else { |
---|
| 786 | // unwarped mode: |
---|
| 787 | memcpy(buf->user_data+buf->meta.ring.write_pos, data, *len); |
---|
| 788 | buf->meta.ring.write_pos += *len; |
---|
| 789 | return 0; |
---|
| 790 | } |
---|
[3020] | 791 | } else { |
---|
[4624] | 792 | ring = &(buf->meta.ring); |
---|
| 793 | done = 0; |
---|
| 794 | |
---|
| 795 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p): write_pos=%u, read_pos=%u, user_len=%u", buf, data, len, (unsigned int)ring->write_pos, (unsigned int)ring->read_pos, (unsigned int)buf->user_len); |
---|
| 796 | |
---|
| 797 | if ( ring->write_pos >= ring->read_pos ) { |
---|
[4625] | 798 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = ?", buf, data, len); |
---|
| 799 | |
---|
[4624] | 800 | havelen = buf->user_len - ring->write_pos; |
---|
| 801 | |
---|
| 802 | if ( ring->read_pos == 0 ) |
---|
| 803 | havelen--; |
---|
| 804 | |
---|
| 805 | if ( havelen > *len ) |
---|
| 806 | havelen = *len; |
---|
| 807 | |
---|
| 808 | memcpy(buf->user_data+ring->write_pos, data, havelen); |
---|
| 809 | |
---|
| 810 | done += havelen; |
---|
| 811 | ring->write_pos += havelen; |
---|
| 812 | |
---|
| 813 | if ( ring->write_pos == buf->user_len ) |
---|
| 814 | ring->write_pos = 0; |
---|
| 815 | |
---|
| 816 | if ( *len > done && ring->read_pos != 0 ) { |
---|
| 817 | tmp = *len - done; |
---|
| 818 | if ( roar_buffer_ring_write(buf, data+done, &tmp) == 0 ) { |
---|
| 819 | done += tmp; |
---|
| 820 | } |
---|
| 821 | } |
---|
| 822 | |
---|
| 823 | *len = done; |
---|
[4625] | 824 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = 0", buf, data, len); |
---|
[4624] | 825 | return 0; |
---|
| 826 | } else { |
---|
[4625] | 827 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = ?", buf, data, len); |
---|
| 828 | |
---|
[4624] | 829 | // test for buffer-is-full: |
---|
| 830 | if ( (ring->write_pos + 1) == ring->read_pos ) { |
---|
| 831 | *len = 0; |
---|
[4625] | 832 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = 0", buf, data, len); |
---|
[4624] | 833 | return 0; |
---|
| 834 | } |
---|
| 835 | |
---|
[4625] | 836 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = ?", buf, data, len); |
---|
| 837 | |
---|
[4624] | 838 | havelen = ring->read_pos - ring->write_pos - 1; |
---|
| 839 | |
---|
| 840 | if ( havelen > *len ) |
---|
| 841 | havelen = *len; |
---|
| 842 | |
---|
| 843 | memcpy(buf->user_data+ring->write_pos, data, havelen); |
---|
| 844 | |
---|
[4625] | 845 | ring->write_pos += havelen; |
---|
[4624] | 846 | *len = havelen; |
---|
[4625] | 847 | |
---|
| 848 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = 0", buf, data, len); |
---|
[4624] | 849 | return 0; |
---|
| 850 | } |
---|
[3020] | 851 | } |
---|
| 852 | |
---|
[4905] | 853 | roar_err_set(ROAR_ERROR_UNKNOWN); |
---|
[3020] | 854 | return -1; |
---|
| 855 | } |
---|
| 856 | |
---|
[4625] | 857 | int roar_buffer_ring_avail(struct roar_buffer * buf, size_t * readlen, size_t * writelen) { |
---|
| 858 | struct roar_buffer_ring * ring; |
---|
| 859 | size_t have; |
---|
| 860 | |
---|
[4905] | 861 | _ckbuf(0) |
---|
[4625] | 862 | |
---|
[4905] | 863 | if ( !(buf->flags & ROAR_BUFFER_FLAG_RING) ) { |
---|
| 864 | roar_err_set(ROAR_ERROR_TYPEMM); |
---|
[4625] | 865 | return -1; |
---|
[4905] | 866 | } |
---|
[4625] | 867 | |
---|
| 868 | ring = &(buf->meta.ring); |
---|
| 869 | |
---|
| 870 | ROAR_DBG("roar_buffer_ring_avail(buf=%p, readlen=%p, writelen=%p) = ?", buf, readlen, writelen); |
---|
| 871 | |
---|
| 872 | if ( readlen != NULL ) { |
---|
| 873 | have = 0; |
---|
| 874 | |
---|
| 875 | if ( ring->write_pos >= ring->read_pos ) { |
---|
| 876 | have = ring->write_pos - ring->read_pos; |
---|
| 877 | } else { |
---|
| 878 | have = buf->user_len - ring->read_pos; |
---|
| 879 | have += ring->write_pos; |
---|
| 880 | have -= 1; |
---|
| 881 | } |
---|
| 882 | |
---|
| 883 | *readlen = have; |
---|
| 884 | ROAR_DBG("roar_buffer_ring_avail(buf=%p, readlen=%p, writelen=%p): readlen=%llu", buf, readlen, writelen, (unsigned long long int)have); |
---|
| 885 | } |
---|
| 886 | |
---|
| 887 | if ( writelen != NULL ) { |
---|
| 888 | have = 0; |
---|
| 889 | |
---|
| 890 | if ( ring->read_pos > ring->write_pos ) { |
---|
| 891 | have = ring->read_pos - ring->write_pos - 1; |
---|
| 892 | } else { |
---|
| 893 | have = buf->user_len - ring->write_pos; |
---|
| 894 | have += ring->read_pos; |
---|
| 895 | have -= 1; |
---|
| 896 | } |
---|
| 897 | |
---|
| 898 | *writelen = have; |
---|
| 899 | ROAR_DBG("roar_buffer_ring_avail(buf=%p, readlen=%p, writelen=%p): readlen=%llu", buf, readlen, writelen, (unsigned long long int)have); |
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| 900 | } |
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| 901 | |
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| 902 | ROAR_DBG("roar_buffer_ring_avail(buf=%p, readlen=%p, writelen=%p) = 0", buf, readlen, writelen); |
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| 903 | |
---|
| 904 | return 0; |
---|
| 905 | } |
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| 906 | |
---|
[4629] | 907 | int roar_buffer_ring_reset(struct roar_buffer * buf) { |
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[4905] | 908 | _ckbuf(0) |
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[4629] | 909 | |
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[4905] | 910 | if ( !(buf->flags & ROAR_BUFFER_FLAG_RING) ) { |
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| 911 | roar_err_set(ROAR_ERROR_TYPEMM); |
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[4629] | 912 | return -1; |
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[4905] | 913 | } |
---|
[4629] | 914 | |
---|
| 915 | buf->meta.ring.read_pos = buf->meta.ring.write_pos = 0; |
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| 916 | |
---|
| 917 | return 0; |
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| 918 | } |
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| 919 | |
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[0] | 920 | //ll |
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