[0] | 1 | //buffer.c: |
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| 2 | |
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[690] | 3 | /* |
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[4708] | 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008-2011 |
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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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| 81 | ROAR_DBG("_ckmem_corruption(buf=%p{.flags=0x%.4x, ...} = ?", buf, buf->flags); |
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| 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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[5011] | 183 | flags = buf->flags & (ROAR_BUFFER_FLAG_USEABLE|ROAR_BUFFER_FLAG_FREED); |
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| 184 | if ( flags == ROAR_BUFFER_FLAG_FREED ) { |
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| 185 | roar_panic(ROAR_FATAL_ERROR_MEMORY_DOUBLE_FREE, NULL); |
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| 186 | } |
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| 187 | |
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[5131] | 188 | _ckmem_corruption(buf, 0); |
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[5011] | 189 | |
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| 190 | ROAR_DBG("roar_buffer_unref(buf=%p) = ?", buf); |
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[0] | 191 | |
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[4522] | 192 | if ( buf->refc == 0 ) { |
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| 193 | ROAR_WARN("roar_buffer_unref(buf=%p): Ref counter is wrong. assuming one."); |
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| 194 | buf->refc = 1; |
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[4973] | 195 | roar_panic(ROAR_FATAL_ERROR_MEMORY_CORRUPTION, NULL); |
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[4522] | 196 | } |
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| 197 | |
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| 198 | buf->refc--; |
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| 199 | |
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[5011] | 200 | if ( buf->refc ) { |
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| 201 | ROAR_DBG("roar_buffer_unref(buf=%p) = 0", buf); |
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[4522] | 202 | return 0; |
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[0] | 203 | } |
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| 204 | |
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[5011] | 205 | ROAR_DBG("roar_buffer_unref(buf=%p) = ?", buf); |
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| 206 | |
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| 207 | cur = buf->next; |
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| 208 | while (cur != NULL) { |
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| 209 | flags = cur->flags & (ROAR_BUFFER_FLAG_USEABLE|ROAR_BUFFER_FLAG_FREED); |
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| 210 | if ( flags == ROAR_BUFFER_FLAG_FREED ) { |
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| 211 | roar_panic(ROAR_FATAL_ERROR_MEMORY_DOUBLE_FREE, NULL); |
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| 212 | } |
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| 213 | |
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| 214 | ROAR_DBG("roar_buffer_unref(buf=%p) = ?", buf); |
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| 215 | |
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[5131] | 216 | _ckmem_corruption(cur, 0); |
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[5011] | 217 | |
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| 218 | if ( roar_buffer_get_flag(cur, ROAR_BUFFER_FLAG_NOFREE) != 1 ) |
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| 219 | roar_mm_free(cur->data); |
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| 220 | |
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| 221 | cur->flags = ROAR_BUFFER_FLAG_FREED; |
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| 222 | next = cur->next; |
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| 223 | roar_mm_free(cur); |
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| 224 | cur = next; |
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| 225 | } |
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| 226 | |
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| 227 | ROAR_DBG("roar_buffer_unref(buf=%p) = ?", buf); |
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| 228 | |
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| 229 | if ( !(buf->flags & ROAR_BUFFER_FLAG_NOFREE) ) |
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[2976] | 230 | roar_mm_free(buf->data); |
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[1215] | 231 | |
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[5011] | 232 | ROAR_DBG("roar_buffer_unref(buf=%p): setting flags = ROAR_BUFFER_FLAG_FREED", buf); |
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| 233 | buf->flags = ROAR_BUFFER_FLAG_FREED; |
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| 234 | |
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[2976] | 235 | roar_mm_free(buf); |
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[0] | 236 | |
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[5011] | 237 | ROAR_DBG("roar_buffer_unref(buf=%p) = 0", buf); |
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[0] | 238 | return 0; |
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| 239 | } |
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| 240 | |
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| 241 | int roar_buffer_delete (struct roar_buffer * buf, struct roar_buffer ** next) { |
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| 242 | if ( buf == NULL ) { |
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| 243 | if ( next != NULL ) |
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| 244 | *next = NULL; |
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[4905] | 245 | roar_err_set(ROAR_ERROR_FAULT); |
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[0] | 246 | return -1; |
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| 247 | } |
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| 248 | |
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| 249 | ROAR_DBG("buffer_delete(buf=%p, next=%p) = ?", buf, next); |
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| 250 | |
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| 251 | if ( next != NULL ) |
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| 252 | *next = buf->next; |
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| 253 | |
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[2976] | 254 | if ( roar_buffer_get_flag(buf, ROAR_BUFFER_FLAG_NOFREE) != 1 ) |
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| 255 | roar_mm_free(buf->data); |
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| 256 | |
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| 257 | roar_mm_free(buf); |
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[0] | 258 | |
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| 259 | ROAR_DBG("buffer_delete(buf=%p, next=%p) = 0", buf, next); |
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| 260 | return 0; |
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| 261 | } |
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| 262 | |
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[5298] | 263 | int roar_buffer_next (struct roar_buffer ** buf) { |
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| 264 | return roar_buffer_delete(*buf, buf); |
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| 265 | } |
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| 266 | |
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[0] | 267 | int roar_buffer_add (struct roar_buffer * buf, struct roar_buffer * next) { |
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[5299] | 268 | return roar_buffer_moveinto(buf, &next); |
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[5298] | 269 | } |
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| 270 | |
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[5299] | 271 | int roar_buffer_moveinto (struct roar_buffer * buf, struct roar_buffer ** next) { |
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[1953] | 272 | unsigned int deep = 0; |
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| 273 | |
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[5299] | 274 | _ckbuf(next == NULL || _ckmem_corruption(*next, 0)) |
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[0] | 275 | |
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| 276 | ROAR_DBG("buffer_add(buf=%p, next=%p) = ?", buf, next); |
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[5299] | 277 | ROAR_DBG("buffer_add(buf=%p, next=%p): *next=%p", buf, next, *next); |
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[0] | 278 | |
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[4905] | 279 | if ( buf->flags & ROAR_BUFFER_FLAG_RING ) { |
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| 280 | roar_err_set(ROAR_ERROR_INVAL); |
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[3020] | 281 | return -1; |
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[4905] | 282 | } |
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[3020] | 283 | |
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[5299] | 284 | if ( buf == *next ) { |
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[1953] | 285 | ROAR_ERR("buffer_add(*): both pointer are of the same destination, This is a error in the application"); |
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[4905] | 286 | roar_err_set(ROAR_ERROR_INVAL); |
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[1953] | 287 | return -1; |
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| 288 | } |
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| 289 | |
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[0] | 290 | while ( buf->next != NULL ) { |
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[302] | 291 | ROAR_DBG("buffer_add(*): buf=%p, next=%p (len=%i)", buf, buf->next, buf->user_len); |
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[0] | 292 | // ROAR_DBG("buffer_add(): buf=%p, buf->next=%p", buf, buf->next); |
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| 293 | buf = buf->next; |
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[1953] | 294 | deep++; |
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| 295 | |
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[5299] | 296 | if ( buf == *next ) { |
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[1953] | 297 | 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] | 298 | // why don't we return here? |
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[1953] | 299 | } |
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[0] | 300 | } |
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| 301 | |
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[5299] | 302 | buf->next = *next; |
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[0] | 303 | |
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[1953] | 304 | ROAR_DBG("buffer_add(*): adding buffer at deep %u", deep); |
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| 305 | |
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[5299] | 306 | *next = NULL; |
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| 307 | |
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[0] | 308 | return 0; |
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| 309 | } |
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| 310 | |
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| 311 | int roar_buffer_get_next (struct roar_buffer * buf, struct roar_buffer ** next) { |
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[4905] | 312 | _ckbuf(0) |
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[0] | 313 | |
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| 314 | *next = buf->next; |
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| 315 | |
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| 316 | return 0; |
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| 317 | } |
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| 318 | |
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[3020] | 319 | int roar_buffer_ring_new (struct roar_buffer ** buf, size_t len, int free_running) { |
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| 320 | struct roar_buffer * n; |
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| 321 | |
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[5011] | 322 | _ckbuf_free(0) |
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[4905] | 323 | |
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| 324 | if ( len == 0 ) { |
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| 325 | roar_err_set(ROAR_ERROR_RANGE); |
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[3020] | 326 | return -1; |
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[4905] | 327 | } |
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[3020] | 328 | |
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| 329 | // just to be sure: |
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| 330 | *buf = NULL; |
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| 331 | |
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| 332 | if ( roar_buffer_new(&n, len) == -1 ) |
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| 333 | return -1; |
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| 334 | |
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| 335 | n->flags |= ROAR_BUFFER_FLAG_RING; |
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| 336 | |
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| 337 | if ( free_running ) |
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| 338 | n->flags |= ROAR_BUFFER_FLAG_FREE_RUNNING; |
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| 339 | |
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| 340 | n->meta.ring.read_pos = 0; |
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| 341 | n->meta.ring.write_pos = 0; |
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| 342 | |
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| 343 | memset(n->data, 0, n->len); |
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| 344 | |
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| 345 | *buf = n; |
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| 346 | |
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| 347 | return 0; |
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| 348 | } |
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| 349 | |
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[0] | 350 | int roar_buffer_get_data (struct roar_buffer * buf, void ** data) { |
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[4905] | 351 | _ckbuf(0) |
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[0] | 352 | |
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| 353 | *data = buf->user_data; |
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| 354 | |
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| 355 | return 0; |
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| 356 | } |
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| 357 | |
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| 358 | int roar_buffer_set_offset (struct roar_buffer * buf, size_t off) { |
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[4905] | 359 | _ckbuf(0) |
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| 360 | |
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| 361 | if ( off > buf->user_len ) { |
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| 362 | roar_err_set(ROAR_ERROR_RANGE); |
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[0] | 363 | return -1; |
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[4905] | 364 | } |
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[0] | 365 | |
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| 366 | buf->user_len -= off; |
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| 367 | buf->user_data += off; |
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| 368 | |
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| 369 | return 0; |
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| 370 | } |
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| 371 | |
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[904] | 372 | int roar_buffer_shift_out (struct roar_buffer ** buf, void * data, size_t * len) { |
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| 373 | size_t todo, cl; |
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| 374 | struct roar_buffer * cur; |
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| 375 | void * cd; |
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| 376 | |
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[5011] | 377 | _ckbuf_free(len == NULL || data == NULL); |
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[904] | 378 | |
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[996] | 379 | if ( *buf == NULL ) { |
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| 380 | 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] | 381 | roar_err_set(ROAR_ERROR_FAULT); |
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[904] | 382 | return -1; |
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[996] | 383 | } |
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[904] | 384 | |
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| 385 | todo = *len; |
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| 386 | cur = *buf; |
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| 387 | |
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| 388 | *len = 0; |
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| 389 | |
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[2066] | 390 | while (todo && cur != NULL) { |
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[904] | 391 | ROAR_DBG("roar_buffer_shift_out(*): todo=%u, cur=%p", (unsigned int) todo, cur); |
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| 392 | |
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[5131] | 393 | _ckmem_corruption(cur, 0); |
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[5013] | 394 | |
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[904] | 395 | if ( roar_buffer_get_len(cur, &cl) == -1 ) |
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| 396 | return -1; |
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| 397 | |
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| 398 | if ( cl > todo ) { |
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| 399 | if ( roar_buffer_get_data(cur, &cd) == -1 ) |
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| 400 | return -1; |
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| 401 | |
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| 402 | cl = todo; |
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| 403 | |
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| 404 | memcpy(data, cd, cl); |
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| 405 | todo -= cl; |
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| 406 | data += cl; |
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| 407 | *len += cl; |
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| 408 | |
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| 409 | if ( roar_buffer_set_offset(cur, cl) == -1 ) |
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| 410 | return -1; |
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| 411 | } else { |
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| 412 | if ( roar_buffer_get_data(cur, &cd) == -1 ) |
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| 413 | return -1; |
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| 414 | |
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| 415 | memcpy(data, cd, cl); |
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| 416 | todo -= cl; |
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| 417 | data += cl; |
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| 418 | *len += cl; |
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| 419 | |
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| 420 | if ( roar_buffer_next(&cur) == -1 ) |
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| 421 | return -1; |
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| 422 | } |
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| 423 | |
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| 424 | /* |
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| 425 | if ( cur == NULL ) |
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| 426 | break; |
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| 427 | */ |
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| 428 | } |
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| 429 | |
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| 430 | *buf = cur; |
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| 431 | |
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[996] | 432 | return 0; |
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[904] | 433 | } |
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| 434 | |
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[0] | 435 | int roar_buffer_set_meta (struct roar_buffer * buf, void * meta) { |
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[4905] | 436 | _ckbuf(0) |
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[0] | 437 | |
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[2333] | 438 | buf->meta.vp = meta; |
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[0] | 439 | |
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| 440 | return 0; |
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| 441 | } |
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| 442 | |
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| 443 | int roar_buffer_get_meta (struct roar_buffer * buf, void ** meta) { |
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[4905] | 444 | _ckbuf(meta == NULL) |
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[2333] | 445 | |
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| 446 | *meta = buf->meta.vp; |
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| 447 | |
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| 448 | return 0; |
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| 449 | } |
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| 450 | |
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| 451 | int roar_buffer_set_meta_i32(struct roar_buffer * buf, int32_t meta) { |
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[4905] | 452 | _ckbuf(0) |
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[0] | 453 | |
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[2333] | 454 | buf->meta.i32 = meta; |
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| 455 | |
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| 456 | return 0; |
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| 457 | } |
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| 458 | |
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| 459 | int roar_buffer_get_meta_i32(struct roar_buffer * buf, int32_t * meta) { |
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[4905] | 460 | _ckbuf(meta == NULL) |
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[2333] | 461 | |
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| 462 | *meta = buf->meta.i32; |
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[0] | 463 | |
---|
| 464 | return 0; |
---|
| 465 | } |
---|
| 466 | |
---|
[4901] | 467 | int roar_buffer_set_type (struct roar_buffer * buf, int type) { |
---|
[4905] | 468 | _ckbuf(0) |
---|
[4901] | 469 | |
---|
[4903] | 470 | switch (type) { |
---|
| 471 | case ROAR_VIO_DFT_RAW: |
---|
| 472 | case ROAR_VIO_DFT_PACKET: |
---|
| 473 | case ROAR_VIO_DFT_UNFRAMED: |
---|
[4988] | 474 | case ROAR_VIO_DFT_OGG_PACKET: |
---|
| 475 | case ROAR_VIO_DFT_OGG_PAGE: |
---|
[4903] | 476 | break; |
---|
| 477 | default: |
---|
[4905] | 478 | roar_err_set(ROAR_ERROR_NOTSUP); |
---|
[4903] | 479 | return -1; |
---|
| 480 | } |
---|
| 481 | |
---|
[4901] | 482 | buf->type = type; |
---|
| 483 | |
---|
| 484 | return 0; |
---|
| 485 | } |
---|
| 486 | |
---|
| 487 | int roar_buffer_get_type (struct roar_buffer * buf, int * type) { |
---|
[4905] | 488 | _ckbuf(type == NULL) |
---|
[4901] | 489 | |
---|
| 490 | *type = buf->type; |
---|
| 491 | |
---|
| 492 | return 0; |
---|
| 493 | } |
---|
| 494 | |
---|
[0] | 495 | int roar_buffer_set_len (struct roar_buffer * buf, size_t len) { |
---|
[2334] | 496 | size_t totlen; |
---|
| 497 | void * newbuf; |
---|
| 498 | |
---|
[4905] | 499 | _ckbuf(0) |
---|
[0] | 500 | |
---|
[3032] | 501 | // handle specal case where user length is zero: |
---|
| 502 | if ( len && !buf->user_len ) { |
---|
| 503 | buf->user_data = buf->data; |
---|
| 504 | buf->user_len = buf->len; |
---|
| 505 | } |
---|
| 506 | |
---|
[2334] | 507 | if ( len > buf->user_len ) { |
---|
[3021] | 508 | // we can only enlage a buffer if it's one of our own memory segments |
---|
[4905] | 509 | if ( buf->flags & ROAR_BUFFER_FLAG_NOFREE ) { |
---|
| 510 | roar_err_set(ROAR_ERROR_NOTSUP); |
---|
[3021] | 511 | return -1; |
---|
[4905] | 512 | } |
---|
[3021] | 513 | |
---|
[4989] | 514 | totlen = (buf->len - buf->user_len) + len; |
---|
[3021] | 515 | newbuf = roar_mm_realloc(buf->data, totlen); |
---|
[2334] | 516 | if ( newbuf == NULL ) |
---|
| 517 | return -1; |
---|
| 518 | |
---|
[4988] | 519 | buf->user_data = newbuf + (buf->user_data - buf->data); |
---|
[4989] | 520 | buf->user_len = len; |
---|
[2334] | 521 | buf->data = newbuf; |
---|
[4989] | 522 | buf->len = totlen; |
---|
[2334] | 523 | } else { |
---|
| 524 | buf->user_len = len; |
---|
| 525 | } |
---|
[0] | 526 | |
---|
| 527 | return 0; |
---|
| 528 | } |
---|
| 529 | |
---|
| 530 | int roar_buffer_get_len (struct roar_buffer * buf, size_t * len) { |
---|
[4905] | 531 | _ckbuf(0) |
---|
[0] | 532 | |
---|
| 533 | *len = buf->user_len; |
---|
| 534 | |
---|
| 535 | return 0; |
---|
| 536 | } |
---|
| 537 | |
---|
[1215] | 538 | int roar_buffer_set_flag (struct roar_buffer * buf, int flag, int reset) { |
---|
[4905] | 539 | _ckbuf(0) |
---|
[1215] | 540 | |
---|
| 541 | buf->flags |= flag; |
---|
| 542 | |
---|
| 543 | if ( reset ) |
---|
| 544 | buf->flags -= flag; |
---|
| 545 | |
---|
| 546 | return 0; |
---|
| 547 | } |
---|
| 548 | |
---|
| 549 | int roar_buffer_get_flag (struct roar_buffer * buf, int flag) { |
---|
[4905] | 550 | _ckbuf(0) |
---|
[1215] | 551 | |
---|
| 552 | return buf->flags & flag; |
---|
| 553 | } |
---|
| 554 | |
---|
[46] | 555 | int roar_buffer_duplicate (struct roar_buffer * buf, struct roar_buffer ** copy) { |
---|
| 556 | struct roar_buffer * cur = buf; |
---|
| 557 | struct roar_buffer * new; |
---|
[48] | 558 | void * od, * nd; |
---|
[4905] | 559 | int err; |
---|
| 560 | |
---|
| 561 | _ckbuf(copy == NULL) |
---|
[46] | 562 | |
---|
| 563 | *copy = NULL; |
---|
| 564 | |
---|
[5111] | 565 | // TODO: This function does not handle ring buffers. |
---|
| 566 | // FIXME: This function does not error out in case of wrong buffer type in buf. |
---|
| 567 | // TODO: This function does not handle buffer meta data. |
---|
| 568 | |
---|
[4905] | 569 | while (cur != NULL) { |
---|
[46] | 570 | if ( roar_buffer_new(&new, cur->user_len) == -1 ) { |
---|
[4905] | 571 | err = roar_error; |
---|
[46] | 572 | roar_buffer_free(*copy); |
---|
[4905] | 573 | roar_err_set(err); |
---|
[46] | 574 | return -1; |
---|
| 575 | } |
---|
| 576 | |
---|
| 577 | if ( *copy == NULL ) |
---|
| 578 | *copy = new; |
---|
| 579 | |
---|
[5111] | 580 | _LIBROAR_IGNORE_RET(roar_buffer_get_data(cur, &od)); |
---|
| 581 | _LIBROAR_IGNORE_RET(roar_buffer_get_data(new, &nd)); |
---|
[48] | 582 | memcpy(nd, od, cur->user_len); |
---|
| 583 | |
---|
[5300] | 584 | _LIBROAR_IGNORE_RET(roar_buffer_moveinto(*copy, &new)); |
---|
[46] | 585 | |
---|
| 586 | cur = cur->next; |
---|
| 587 | } |
---|
[4905] | 588 | |
---|
[46] | 589 | return 0; |
---|
| 590 | } |
---|
| 591 | |
---|
[7] | 592 | int roar_buffer_ring_stats (struct roar_buffer * buf, struct roar_buffer_stats * stats) { |
---|
[5131] | 593 | ROAR_DBG("roar_buffer_ring_stats(buf=%p, stats=%p) = ?", buf, stats); |
---|
| 594 | |
---|
[4905] | 595 | _ckbuf(0) |
---|
[7] | 596 | |
---|
[5131] | 597 | ROAR_DBG("roar_buffer_ring_stats(buf=%p, stats=%p) = ?", buf, stats); |
---|
| 598 | |
---|
[7] | 599 | stats->parts = 0; |
---|
| 600 | stats->bytes = 0; |
---|
| 601 | stats->memory_usage = 0; |
---|
| 602 | |
---|
[4905] | 603 | while (buf != NULL ) { |
---|
[7] | 604 | stats->parts++; |
---|
| 605 | stats->bytes += buf->user_len; |
---|
| 606 | stats->memory_usage += buf->len + sizeof(struct roar_buffer); |
---|
| 607 | buf = buf->next; |
---|
| 608 | } |
---|
| 609 | |
---|
| 610 | return 0; |
---|
| 611 | } |
---|
| 612 | |
---|
[3020] | 613 | int roar_buffer_ring_read (struct roar_buffer * buf, void * data, size_t * len) { |
---|
[4615] | 614 | struct roar_buffer_ring * ring; |
---|
| 615 | size_t havelen; |
---|
| 616 | size_t done; |
---|
| 617 | size_t tmp; |
---|
| 618 | |
---|
[4905] | 619 | _ckbuf(len == NULL) |
---|
| 620 | |
---|
[3020] | 621 | if ( buf == NULL || len == NULL ) |
---|
| 622 | return -1; |
---|
| 623 | |
---|
[4905] | 624 | if ( data == NULL && *len != 0 ) { |
---|
| 625 | roar_err_set(ROAR_ERROR_FAULT); |
---|
[3020] | 626 | return -1; |
---|
[4905] | 627 | } |
---|
[3020] | 628 | |
---|
[4905] | 629 | if ( !(buf->flags & ROAR_BUFFER_FLAG_RING) ) { |
---|
| 630 | roar_err_set(ROAR_ERROR_TYPEMM); |
---|
[3020] | 631 | return -1; |
---|
[4905] | 632 | } |
---|
[3020] | 633 | |
---|
| 634 | if ( *len == 0 ) |
---|
| 635 | return 0; |
---|
| 636 | |
---|
| 637 | // we may handle this later: |
---|
[4905] | 638 | if ( *len > buf->user_len ) { |
---|
| 639 | roar_err_set(ROAR_ERROR_NOTSUP); |
---|
[3020] | 640 | return -1; |
---|
[4905] | 641 | } |
---|
[3020] | 642 | |
---|
[4615] | 643 | if ( (buf->flags & ROAR_BUFFER_FLAG_FREE_RUNNING) ) { |
---|
| 644 | if ( buf->meta.ring.read_pos >= buf->user_len ) |
---|
| 645 | buf->meta.ring.read_pos -= buf->user_len; |
---|
[3020] | 646 | |
---|
[4615] | 647 | if ( (*len + buf->meta.ring.read_pos) > buf->user_len ) { |
---|
| 648 | // wraped mode: |
---|
| 649 | memcpy(data, buf->user_data+buf->meta.ring.read_pos, buf->user_len - buf->meta.ring.read_pos); |
---|
| 650 | memcpy(data, buf->user_data, *len + buf->meta.ring.read_pos - buf->user_len); |
---|
| 651 | |
---|
| 652 | buf->meta.ring.read_pos += *len; |
---|
| 653 | buf->meta.ring.read_pos -= buf->user_len; |
---|
| 654 | return 0; |
---|
| 655 | } else { |
---|
| 656 | // unwarped mode: |
---|
| 657 | memcpy(data, buf->user_data+buf->meta.ring.read_pos, *len); |
---|
| 658 | buf->meta.ring.read_pos += *len; |
---|
| 659 | return 0; |
---|
| 660 | } |
---|
| 661 | } else { |
---|
| 662 | ring = &(buf->meta.ring); |
---|
| 663 | |
---|
| 664 | if ( ring->read_pos == ring->write_pos ) { |
---|
| 665 | *len = 0; |
---|
| 666 | return 0; |
---|
| 667 | } else if ( ring->read_pos < ring->write_pos ) { |
---|
| 668 | havelen = ring->write_pos - ring->read_pos; |
---|
| 669 | |
---|
| 670 | if ( havelen > *len ) |
---|
| 671 | havelen = *len; |
---|
| 672 | |
---|
| 673 | memcpy(data, buf->user_data+ring->read_pos, havelen); |
---|
| 674 | ring->read_pos += havelen; |
---|
[3020] | 675 | |
---|
[4615] | 676 | *len = havelen; |
---|
| 677 | return 0; |
---|
| 678 | } else { // write_pos < read_pos |
---|
| 679 | done = 0; |
---|
| 680 | |
---|
| 681 | // first pass: use data up to end of buffer |
---|
| 682 | |
---|
| 683 | havelen = buf->user_len - ring->read_pos; |
---|
| 684 | |
---|
| 685 | if ( havelen > *len ) |
---|
| 686 | havelen = *len; |
---|
| 687 | |
---|
| 688 | memcpy(data, buf->user_data+ring->read_pos, havelen); |
---|
| 689 | ring->read_pos += havelen; |
---|
| 690 | |
---|
| 691 | done += havelen; |
---|
| 692 | |
---|
| 693 | if ( ring->read_pos == buf->user_len ) { |
---|
| 694 | ring->read_pos = 0; |
---|
| 695 | } |
---|
| 696 | |
---|
| 697 | // second pass: use data from strat of buffer to write pointer |
---|
| 698 | |
---|
| 699 | if ( *len > done ) { |
---|
| 700 | tmp = *len - done; |
---|
| 701 | if ( roar_buffer_ring_read(buf, data+done, &tmp) == 0 ) { |
---|
| 702 | done += tmp; |
---|
| 703 | } |
---|
| 704 | } |
---|
| 705 | |
---|
| 706 | *len = done; |
---|
| 707 | return 0; |
---|
| 708 | } |
---|
[3020] | 709 | } |
---|
| 710 | |
---|
[4905] | 711 | roar_err_set(ROAR_ERROR_UNKNOWN); |
---|
[3020] | 712 | return -1; |
---|
| 713 | } |
---|
| 714 | |
---|
| 715 | int roar_buffer_ring_write (struct roar_buffer * buf, void * data, size_t * len) { |
---|
[4624] | 716 | struct roar_buffer_ring * ring; |
---|
| 717 | size_t havelen; |
---|
| 718 | size_t done; |
---|
| 719 | size_t tmp; |
---|
| 720 | |
---|
[4625] | 721 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = ?", buf, data, len); |
---|
| 722 | |
---|
[4905] | 723 | _ckbuf(len == NULL) |
---|
[3020] | 724 | |
---|
[4905] | 725 | if ( data == NULL && *len != 0 ) { |
---|
| 726 | roar_err_set(ROAR_ERROR_FAULT); |
---|
[3020] | 727 | return -1; |
---|
[4905] | 728 | } |
---|
[3020] | 729 | |
---|
[4905] | 730 | if ( !(buf->flags & ROAR_BUFFER_FLAG_RING) ) { |
---|
| 731 | roar_err_set(ROAR_ERROR_TYPEMM); |
---|
[3020] | 732 | return -1; |
---|
[4905] | 733 | } |
---|
[3020] | 734 | |
---|
| 735 | if ( *len == 0 ) |
---|
| 736 | return 0; |
---|
| 737 | |
---|
| 738 | // we may handle this later: |
---|
[4905] | 739 | if ( *len > buf->user_len ) { |
---|
| 740 | roar_err_set(ROAR_ERROR_NOTSUP); |
---|
[3020] | 741 | return -1; |
---|
[4905] | 742 | } |
---|
[3020] | 743 | |
---|
[4615] | 744 | if ( (buf->flags & ROAR_BUFFER_FLAG_FREE_RUNNING) ) { |
---|
| 745 | if ( buf->meta.ring.write_pos >= buf->user_len ) |
---|
| 746 | buf->meta.ring.write_pos -= buf->user_len; |
---|
[3020] | 747 | |
---|
[4615] | 748 | if ( (*len + buf->meta.ring.write_pos) > buf->user_len ) { |
---|
| 749 | // wraped mode: |
---|
| 750 | memcpy(buf->user_data+buf->meta.ring.write_pos, data, buf->user_len - buf->meta.ring.write_pos); |
---|
| 751 | memcpy(buf->user_data, data, *len + buf->meta.ring.write_pos - buf->user_len); |
---|
[3020] | 752 | |
---|
[4615] | 753 | buf->meta.ring.write_pos += *len; |
---|
| 754 | buf->meta.ring.write_pos -= buf->user_len; |
---|
| 755 | return 0; |
---|
| 756 | } else { |
---|
| 757 | // unwarped mode: |
---|
| 758 | memcpy(buf->user_data+buf->meta.ring.write_pos, data, *len); |
---|
| 759 | buf->meta.ring.write_pos += *len; |
---|
| 760 | return 0; |
---|
| 761 | } |
---|
[3020] | 762 | } else { |
---|
[4624] | 763 | ring = &(buf->meta.ring); |
---|
| 764 | done = 0; |
---|
| 765 | |
---|
| 766 | 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); |
---|
| 767 | |
---|
| 768 | if ( ring->write_pos >= ring->read_pos ) { |
---|
[4625] | 769 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = ?", buf, data, len); |
---|
| 770 | |
---|
[4624] | 771 | havelen = buf->user_len - ring->write_pos; |
---|
| 772 | |
---|
| 773 | if ( ring->read_pos == 0 ) |
---|
| 774 | havelen--; |
---|
| 775 | |
---|
| 776 | if ( havelen > *len ) |
---|
| 777 | havelen = *len; |
---|
| 778 | |
---|
| 779 | memcpy(buf->user_data+ring->write_pos, data, havelen); |
---|
| 780 | |
---|
| 781 | done += havelen; |
---|
| 782 | ring->write_pos += havelen; |
---|
| 783 | |
---|
| 784 | if ( ring->write_pos == buf->user_len ) |
---|
| 785 | ring->write_pos = 0; |
---|
| 786 | |
---|
| 787 | if ( *len > done && ring->read_pos != 0 ) { |
---|
| 788 | tmp = *len - done; |
---|
| 789 | if ( roar_buffer_ring_write(buf, data+done, &tmp) == 0 ) { |
---|
| 790 | done += tmp; |
---|
| 791 | } |
---|
| 792 | } |
---|
| 793 | |
---|
| 794 | *len = done; |
---|
[4625] | 795 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = 0", buf, data, len); |
---|
[4624] | 796 | return 0; |
---|
| 797 | } else { |
---|
[4625] | 798 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = ?", buf, data, len); |
---|
| 799 | |
---|
[4624] | 800 | // test for buffer-is-full: |
---|
| 801 | if ( (ring->write_pos + 1) == ring->read_pos ) { |
---|
| 802 | *len = 0; |
---|
[4625] | 803 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = 0", buf, data, len); |
---|
[4624] | 804 | return 0; |
---|
| 805 | } |
---|
| 806 | |
---|
[4625] | 807 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = ?", buf, data, len); |
---|
| 808 | |
---|
[4624] | 809 | havelen = ring->read_pos - ring->write_pos - 1; |
---|
| 810 | |
---|
| 811 | if ( havelen > *len ) |
---|
| 812 | havelen = *len; |
---|
| 813 | |
---|
| 814 | memcpy(buf->user_data+ring->write_pos, data, havelen); |
---|
| 815 | |
---|
[4625] | 816 | ring->write_pos += havelen; |
---|
[4624] | 817 | *len = havelen; |
---|
[4625] | 818 | |
---|
| 819 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = 0", buf, data, len); |
---|
[4624] | 820 | return 0; |
---|
| 821 | } |
---|
[3020] | 822 | } |
---|
| 823 | |
---|
[4905] | 824 | roar_err_set(ROAR_ERROR_UNKNOWN); |
---|
[3020] | 825 | return -1; |
---|
| 826 | } |
---|
| 827 | |
---|
[4625] | 828 | int roar_buffer_ring_avail(struct roar_buffer * buf, size_t * readlen, size_t * writelen) { |
---|
| 829 | struct roar_buffer_ring * ring; |
---|
| 830 | size_t have; |
---|
| 831 | |
---|
[4905] | 832 | _ckbuf(0) |
---|
[4625] | 833 | |
---|
[4905] | 834 | if ( !(buf->flags & ROAR_BUFFER_FLAG_RING) ) { |
---|
| 835 | roar_err_set(ROAR_ERROR_TYPEMM); |
---|
[4625] | 836 | return -1; |
---|
[4905] | 837 | } |
---|
[4625] | 838 | |
---|
| 839 | ring = &(buf->meta.ring); |
---|
| 840 | |
---|
| 841 | ROAR_DBG("roar_buffer_ring_avail(buf=%p, readlen=%p, writelen=%p) = ?", buf, readlen, writelen); |
---|
| 842 | |
---|
| 843 | if ( readlen != NULL ) { |
---|
| 844 | have = 0; |
---|
| 845 | |
---|
| 846 | if ( ring->write_pos >= ring->read_pos ) { |
---|
| 847 | have = ring->write_pos - ring->read_pos; |
---|
| 848 | } else { |
---|
| 849 | have = buf->user_len - ring->read_pos; |
---|
| 850 | have += ring->write_pos; |
---|
| 851 | have -= 1; |
---|
| 852 | } |
---|
| 853 | |
---|
| 854 | *readlen = have; |
---|
| 855 | ROAR_DBG("roar_buffer_ring_avail(buf=%p, readlen=%p, writelen=%p): readlen=%llu", buf, readlen, writelen, (unsigned long long int)have); |
---|
| 856 | } |
---|
| 857 | |
---|
| 858 | if ( writelen != NULL ) { |
---|
| 859 | have = 0; |
---|
| 860 | |
---|
| 861 | if ( ring->read_pos > ring->write_pos ) { |
---|
| 862 | have = ring->read_pos - ring->write_pos - 1; |
---|
| 863 | } else { |
---|
| 864 | have = buf->user_len - ring->write_pos; |
---|
| 865 | have += ring->read_pos; |
---|
| 866 | have -= 1; |
---|
| 867 | } |
---|
| 868 | |
---|
| 869 | *writelen = have; |
---|
| 870 | ROAR_DBG("roar_buffer_ring_avail(buf=%p, readlen=%p, writelen=%p): readlen=%llu", buf, readlen, writelen, (unsigned long long int)have); |
---|
| 871 | } |
---|
| 872 | |
---|
| 873 | ROAR_DBG("roar_buffer_ring_avail(buf=%p, readlen=%p, writelen=%p) = 0", buf, readlen, writelen); |
---|
| 874 | |
---|
| 875 | return 0; |
---|
| 876 | } |
---|
| 877 | |
---|
[4629] | 878 | int roar_buffer_ring_reset(struct roar_buffer * buf) { |
---|
[4905] | 879 | _ckbuf(0) |
---|
[4629] | 880 | |
---|
[4905] | 881 | if ( !(buf->flags & ROAR_BUFFER_FLAG_RING) ) { |
---|
| 882 | roar_err_set(ROAR_ERROR_TYPEMM); |
---|
[4629] | 883 | return -1; |
---|
[4905] | 884 | } |
---|
[4629] | 885 | |
---|
| 886 | buf->meta.ring.read_pos = buf->meta.ring.write_pos = 0; |
---|
| 887 | |
---|
| 888 | return 0; |
---|
| 889 | } |
---|
| 890 | |
---|
[0] | 891 | //ll |
---|