[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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| 97 | } |
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| 98 | |
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| 99 | return 0; |
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| 100 | } |
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[4905] | 101 | |
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[3764] | 102 | int roar_buffer_new_data (struct roar_buffer ** buf, size_t len, void ** data) { |
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| 103 | void * bufdata; |
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[4905] | 104 | int err; |
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[3764] | 105 | |
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| 106 | if ((bufdata = roar_mm_malloc(len)) == NULL) { |
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[1215] | 107 | return -1; |
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| 108 | } |
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| 109 | |
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[3764] | 110 | if ( roar_buffer_new_no_ma(buf, len, bufdata) == -1 ) { |
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[4905] | 111 | err = roar_error; |
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[3764] | 112 | roar_mm_free(bufdata); |
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[4905] | 113 | roar_err_set(err); |
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[1215] | 114 | return -1; |
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| 115 | } |
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| 116 | |
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| 117 | if ( roar_buffer_set_flag(*buf, ROAR_BUFFER_FLAG_NOFREE, ROAR_BUFFER_RESET) == -1 ) { |
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[4905] | 118 | err = roar_error; |
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[1215] | 119 | roar_buffer_free(*buf); |
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[3764] | 120 | roar_mm_free(bufdata); |
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[4905] | 121 | roar_err_set(err); |
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[1215] | 122 | return -1; |
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| 123 | } |
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| 124 | |
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[3764] | 125 | if ( data != NULL ) |
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| 126 | *data = bufdata; |
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| 127 | |
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[1215] | 128 | return 0; |
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| 129 | } |
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| 130 | |
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| 131 | int roar_buffer_new_no_ma(struct roar_buffer ** buf, size_t len, void * data) { // no internal malloc |
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[0] | 132 | struct roar_buffer * new; |
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| 133 | |
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| 134 | ROAR_DBG("buffer_new(buf=%p, len=%i) = ?", buf, len); |
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| 135 | |
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[5011] | 136 | _ckbuf_free(data == NULL) |
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[1215] | 137 | |
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[2976] | 138 | if ((new = roar_mm_malloc(sizeof(struct roar_buffer))) == NULL) { |
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[0] | 139 | *buf = NULL; |
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| 140 | return -1; |
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| 141 | } |
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| 142 | |
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[4901] | 143 | new->refc = 1; |
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[4522] | 144 | |
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[1215] | 145 | new->data = data; |
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| 146 | |
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[5011] | 147 | new->flags = ROAR_BUFFER_FLAG_NONE|ROAR_BUFFER_FLAG_NOFREE|ROAR_BUFFER_FLAG_USEABLE; |
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[4901] | 148 | new->type = -1; |
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[0] | 149 | |
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| 150 | new->user_data = new->data; |
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| 151 | |
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| 152 | new->next = NULL; |
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| 153 | |
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| 154 | new->len = len; |
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| 155 | new->user_len = len; |
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| 156 | *buf = new; |
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| 157 | |
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| 158 | ROAR_DBG("buffer_new(buf=%p, len=%i): New buffer at %p", buf, len, new); |
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| 159 | |
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| 160 | return 0; |
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| 161 | } |
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| 162 | |
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[4522] | 163 | int roar_buffer_ref (struct roar_buffer * buf) { |
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[4905] | 164 | _ckbuf(0) |
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[4522] | 165 | |
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| 166 | buf->refc++; |
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| 167 | |
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| 168 | return 0; |
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| 169 | } |
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| 170 | |
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| 171 | int roar_buffer_unref (struct roar_buffer * buf) { |
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[5011] | 172 | struct roar_buffer * next, * cur; |
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| 173 | int flags; |
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| 174 | |
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| 175 | ROAR_DBG("roar_buffer_unref(buf=%p) = ?", buf); |
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| 176 | |
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| 177 | _ckbuf_free(0) |
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| 178 | |
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| 179 | ROAR_DBG("roar_buffer_unref(buf=%p) = ?", buf); |
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[0] | 180 | |
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[5011] | 181 | flags = buf->flags & (ROAR_BUFFER_FLAG_USEABLE|ROAR_BUFFER_FLAG_FREED); |
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| 182 | if ( flags == ROAR_BUFFER_FLAG_FREED ) { |
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| 183 | roar_panic(ROAR_FATAL_ERROR_MEMORY_DOUBLE_FREE, NULL); |
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| 184 | } |
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| 185 | |
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[5131] | 186 | _ckmem_corruption(buf, 0); |
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[5011] | 187 | |
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| 188 | ROAR_DBG("roar_buffer_unref(buf=%p) = ?", buf); |
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[0] | 189 | |
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[4522] | 190 | if ( buf->refc == 0 ) { |
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| 191 | ROAR_WARN("roar_buffer_unref(buf=%p): Ref counter is wrong. assuming one."); |
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| 192 | buf->refc = 1; |
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[4973] | 193 | roar_panic(ROAR_FATAL_ERROR_MEMORY_CORRUPTION, NULL); |
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[4522] | 194 | } |
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| 195 | |
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| 196 | buf->refc--; |
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| 197 | |
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[5011] | 198 | if ( buf->refc ) { |
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| 199 | ROAR_DBG("roar_buffer_unref(buf=%p) = 0", buf); |
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[4522] | 200 | return 0; |
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[0] | 201 | } |
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| 202 | |
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[5011] | 203 | ROAR_DBG("roar_buffer_unref(buf=%p) = ?", buf); |
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| 204 | |
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| 205 | cur = buf->next; |
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| 206 | while (cur != NULL) { |
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| 207 | flags = cur->flags & (ROAR_BUFFER_FLAG_USEABLE|ROAR_BUFFER_FLAG_FREED); |
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| 208 | if ( flags == ROAR_BUFFER_FLAG_FREED ) { |
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| 209 | roar_panic(ROAR_FATAL_ERROR_MEMORY_DOUBLE_FREE, NULL); |
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| 210 | } |
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| 211 | |
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| 212 | ROAR_DBG("roar_buffer_unref(buf=%p) = ?", buf); |
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| 213 | |
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[5131] | 214 | _ckmem_corruption(cur, 0); |
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[5011] | 215 | |
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| 216 | if ( roar_buffer_get_flag(cur, ROAR_BUFFER_FLAG_NOFREE) != 1 ) |
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| 217 | roar_mm_free(cur->data); |
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| 218 | |
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| 219 | cur->flags = ROAR_BUFFER_FLAG_FREED; |
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| 220 | next = cur->next; |
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| 221 | roar_mm_free(cur); |
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| 222 | cur = next; |
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| 223 | } |
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| 224 | |
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| 225 | ROAR_DBG("roar_buffer_unref(buf=%p) = ?", buf); |
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| 226 | |
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| 227 | if ( !(buf->flags & ROAR_BUFFER_FLAG_NOFREE) ) |
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[2976] | 228 | roar_mm_free(buf->data); |
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[1215] | 229 | |
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[5011] | 230 | ROAR_DBG("roar_buffer_unref(buf=%p): setting flags = ROAR_BUFFER_FLAG_FREED", buf); |
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| 231 | buf->flags = ROAR_BUFFER_FLAG_FREED; |
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| 232 | |
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[2976] | 233 | roar_mm_free(buf); |
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[0] | 234 | |
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[5011] | 235 | ROAR_DBG("roar_buffer_unref(buf=%p) = 0", buf); |
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[0] | 236 | return 0; |
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| 237 | } |
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| 238 | |
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| 239 | int roar_buffer_delete (struct roar_buffer * buf, struct roar_buffer ** next) { |
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| 240 | if ( buf == NULL ) { |
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| 241 | if ( next != NULL ) |
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| 242 | *next = NULL; |
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[4905] | 243 | roar_err_set(ROAR_ERROR_FAULT); |
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[0] | 244 | return -1; |
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| 245 | } |
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| 246 | |
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| 247 | ROAR_DBG("buffer_delete(buf=%p, next=%p) = ?", buf, next); |
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| 248 | |
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| 249 | if ( next != NULL ) |
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| 250 | *next = buf->next; |
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| 251 | |
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[2976] | 252 | if ( roar_buffer_get_flag(buf, ROAR_BUFFER_FLAG_NOFREE) != 1 ) |
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| 253 | roar_mm_free(buf->data); |
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| 254 | |
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| 255 | roar_mm_free(buf); |
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[0] | 256 | |
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| 257 | ROAR_DBG("buffer_delete(buf=%p, next=%p) = 0", buf, next); |
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| 258 | return 0; |
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| 259 | } |
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| 260 | |
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| 261 | int roar_buffer_add (struct roar_buffer * buf, struct roar_buffer * next) { |
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[1953] | 262 | unsigned int deep = 0; |
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| 263 | |
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[4905] | 264 | _ckbuf(0) |
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[0] | 265 | |
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| 266 | ROAR_DBG("buffer_add(buf=%p, next=%p) = ?", buf, next); |
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| 267 | |
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[4905] | 268 | if ( buf->flags & ROAR_BUFFER_FLAG_RING ) { |
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| 269 | roar_err_set(ROAR_ERROR_INVAL); |
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[3020] | 270 | return -1; |
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[4905] | 271 | } |
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[3020] | 272 | |
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[1953] | 273 | if ( buf == next ) { |
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| 274 | ROAR_ERR("buffer_add(*): both pointer are of the same destination, This is a error in the application"); |
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[4905] | 275 | roar_err_set(ROAR_ERROR_INVAL); |
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[1953] | 276 | return -1; |
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| 277 | } |
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| 278 | |
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[0] | 279 | while ( buf->next != NULL ) { |
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[302] | 280 | ROAR_DBG("buffer_add(*): buf=%p, next=%p (len=%i)", buf, buf->next, buf->user_len); |
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[0] | 281 | // ROAR_DBG("buffer_add(): buf=%p, buf->next=%p", buf, buf->next); |
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| 282 | buf = buf->next; |
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[1953] | 283 | deep++; |
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| 284 | |
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| 285 | if ( buf == next ) { |
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| 286 | 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] | 287 | // why don't we return here? |
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[1953] | 288 | } |
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[0] | 289 | } |
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| 290 | |
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| 291 | buf->next = next; |
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| 292 | |
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[1953] | 293 | ROAR_DBG("buffer_add(*): adding buffer at deep %u", deep); |
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| 294 | |
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[0] | 295 | return 0; |
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| 296 | } |
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| 297 | |
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[4516] | 298 | int roar_buffer_clear_next (struct roar_buffer * buf) { |
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[4905] | 299 | _ckbuf(0) |
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[4516] | 300 | |
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| 301 | buf->next = NULL; |
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| 302 | |
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| 303 | return 0; |
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| 304 | } |
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| 305 | |
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[0] | 306 | int roar_buffer_get_next (struct roar_buffer * buf, struct roar_buffer ** next) { |
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[4905] | 307 | _ckbuf(0) |
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[0] | 308 | |
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| 309 | *next = buf->next; |
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| 310 | |
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| 311 | return 0; |
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| 312 | } |
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| 313 | |
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[3020] | 314 | int roar_buffer_ring_new (struct roar_buffer ** buf, size_t len, int free_running) { |
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| 315 | struct roar_buffer * n; |
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| 316 | |
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[5011] | 317 | _ckbuf_free(0) |
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[4905] | 318 | |
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| 319 | if ( len == 0 ) { |
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| 320 | roar_err_set(ROAR_ERROR_RANGE); |
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[3020] | 321 | return -1; |
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[4905] | 322 | } |
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[3020] | 323 | |
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| 324 | // just to be sure: |
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| 325 | *buf = NULL; |
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| 326 | |
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| 327 | if ( roar_buffer_new(&n, len) == -1 ) |
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| 328 | return -1; |
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| 329 | |
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| 330 | n->flags |= ROAR_BUFFER_FLAG_RING; |
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| 331 | |
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| 332 | if ( free_running ) |
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| 333 | n->flags |= ROAR_BUFFER_FLAG_FREE_RUNNING; |
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| 334 | |
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| 335 | n->meta.ring.read_pos = 0; |
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| 336 | n->meta.ring.write_pos = 0; |
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| 337 | |
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| 338 | memset(n->data, 0, n->len); |
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| 339 | |
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| 340 | *buf = n; |
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| 341 | |
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| 342 | return 0; |
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| 343 | } |
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| 344 | |
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[0] | 345 | int roar_buffer_get_data (struct roar_buffer * buf, void ** data) { |
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[4905] | 346 | _ckbuf(0) |
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[0] | 347 | |
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| 348 | *data = buf->user_data; |
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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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| 353 | int roar_buffer_set_offset (struct roar_buffer * buf, size_t off) { |
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[4905] | 354 | _ckbuf(0) |
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| 355 | |
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| 356 | if ( off > buf->user_len ) { |
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| 357 | roar_err_set(ROAR_ERROR_RANGE); |
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[0] | 358 | return -1; |
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[4905] | 359 | } |
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[0] | 360 | |
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| 361 | buf->user_len -= off; |
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| 362 | buf->user_data += off; |
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| 363 | |
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| 364 | return 0; |
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| 365 | } |
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| 366 | |
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[904] | 367 | int roar_buffer_shift_out (struct roar_buffer ** buf, void * data, size_t * len) { |
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| 368 | size_t todo, cl; |
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| 369 | struct roar_buffer * cur; |
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| 370 | void * cd; |
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| 371 | |
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[5011] | 372 | _ckbuf_free(len == NULL || data == NULL); |
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[904] | 373 | |
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[996] | 374 | if ( *buf == NULL ) { |
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| 375 | 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] | 376 | roar_err_set(ROAR_ERROR_FAULT); |
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[904] | 377 | return -1; |
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[996] | 378 | } |
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[904] | 379 | |
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| 380 | todo = *len; |
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| 381 | cur = *buf; |
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| 382 | |
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| 383 | *len = 0; |
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| 384 | |
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[2066] | 385 | while (todo && cur != NULL) { |
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[904] | 386 | ROAR_DBG("roar_buffer_shift_out(*): todo=%u, cur=%p", (unsigned int) todo, cur); |
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| 387 | |
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[5131] | 388 | _ckmem_corruption(cur, 0); |
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[5013] | 389 | |
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[904] | 390 | if ( roar_buffer_get_len(cur, &cl) == -1 ) |
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| 391 | return -1; |
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| 392 | |
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| 393 | if ( cl > todo ) { |
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| 394 | if ( roar_buffer_get_data(cur, &cd) == -1 ) |
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| 395 | return -1; |
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| 396 | |
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| 397 | cl = todo; |
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| 398 | |
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| 399 | memcpy(data, cd, cl); |
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| 400 | todo -= cl; |
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| 401 | data += cl; |
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| 402 | *len += cl; |
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| 403 | |
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| 404 | if ( roar_buffer_set_offset(cur, cl) == -1 ) |
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| 405 | return -1; |
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| 406 | } else { |
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| 407 | if ( roar_buffer_get_data(cur, &cd) == -1 ) |
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| 408 | return -1; |
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| 409 | |
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| 410 | memcpy(data, cd, cl); |
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| 411 | todo -= cl; |
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| 412 | data += cl; |
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| 413 | *len += cl; |
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| 414 | |
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| 415 | if ( roar_buffer_next(&cur) == -1 ) |
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| 416 | return -1; |
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| 417 | } |
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| 418 | |
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| 419 | /* |
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| 420 | if ( cur == NULL ) |
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| 421 | break; |
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| 422 | */ |
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| 423 | } |
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| 424 | |
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| 425 | *buf = cur; |
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| 426 | |
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[996] | 427 | return 0; |
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[904] | 428 | } |
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| 429 | |
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[0] | 430 | int roar_buffer_set_meta (struct roar_buffer * buf, void * meta) { |
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[4905] | 431 | _ckbuf(0) |
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[0] | 432 | |
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[2333] | 433 | buf->meta.vp = meta; |
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[0] | 434 | |
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| 435 | return 0; |
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| 436 | } |
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| 437 | |
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| 438 | int roar_buffer_get_meta (struct roar_buffer * buf, void ** meta) { |
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[4905] | 439 | _ckbuf(meta == NULL) |
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[2333] | 440 | |
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| 441 | *meta = buf->meta.vp; |
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| 442 | |
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| 443 | return 0; |
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| 444 | } |
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| 445 | |
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| 446 | int roar_buffer_set_meta_i32(struct roar_buffer * buf, int32_t meta) { |
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[4905] | 447 | _ckbuf(0) |
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[0] | 448 | |
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[2333] | 449 | buf->meta.i32 = meta; |
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| 450 | |
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| 451 | return 0; |
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| 452 | } |
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| 453 | |
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| 454 | int roar_buffer_get_meta_i32(struct roar_buffer * buf, int32_t * meta) { |
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[4905] | 455 | _ckbuf(meta == NULL) |
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[2333] | 456 | |
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| 457 | *meta = buf->meta.i32; |
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[0] | 458 | |
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| 459 | return 0; |
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| 460 | } |
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| 461 | |
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[4901] | 462 | int roar_buffer_set_type (struct roar_buffer * buf, int type) { |
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[4905] | 463 | _ckbuf(0) |
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[4901] | 464 | |
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[4903] | 465 | switch (type) { |
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| 466 | case ROAR_VIO_DFT_RAW: |
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| 467 | case ROAR_VIO_DFT_PACKET: |
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| 468 | case ROAR_VIO_DFT_UNFRAMED: |
---|
[4988] | 469 | case ROAR_VIO_DFT_OGG_PACKET: |
---|
| 470 | case ROAR_VIO_DFT_OGG_PAGE: |
---|
[4903] | 471 | break; |
---|
| 472 | default: |
---|
[4905] | 473 | roar_err_set(ROAR_ERROR_NOTSUP); |
---|
[4903] | 474 | return -1; |
---|
| 475 | } |
---|
| 476 | |
---|
[4901] | 477 | buf->type = type; |
---|
| 478 | |
---|
| 479 | return 0; |
---|
| 480 | } |
---|
| 481 | |
---|
| 482 | int roar_buffer_get_type (struct roar_buffer * buf, int * type) { |
---|
[4905] | 483 | _ckbuf(type == NULL) |
---|
[4901] | 484 | |
---|
| 485 | *type = buf->type; |
---|
| 486 | |
---|
| 487 | return 0; |
---|
| 488 | } |
---|
| 489 | |
---|
[0] | 490 | int roar_buffer_set_len (struct roar_buffer * buf, size_t len) { |
---|
[2334] | 491 | size_t totlen; |
---|
| 492 | void * newbuf; |
---|
| 493 | |
---|
[4905] | 494 | _ckbuf(0) |
---|
[0] | 495 | |
---|
[3032] | 496 | // handle specal case where user length is zero: |
---|
| 497 | if ( len && !buf->user_len ) { |
---|
| 498 | buf->user_data = buf->data; |
---|
| 499 | buf->user_len = buf->len; |
---|
| 500 | } |
---|
| 501 | |
---|
[2334] | 502 | if ( len > buf->user_len ) { |
---|
[3021] | 503 | // we can only enlage a buffer if it's one of our own memory segments |
---|
[4905] | 504 | if ( buf->flags & ROAR_BUFFER_FLAG_NOFREE ) { |
---|
| 505 | roar_err_set(ROAR_ERROR_NOTSUP); |
---|
[3021] | 506 | return -1; |
---|
[4905] | 507 | } |
---|
[3021] | 508 | |
---|
[4989] | 509 | totlen = (buf->len - buf->user_len) + len; |
---|
[3021] | 510 | newbuf = roar_mm_realloc(buf->data, totlen); |
---|
[2334] | 511 | if ( newbuf == NULL ) |
---|
| 512 | return -1; |
---|
| 513 | |
---|
[4988] | 514 | buf->user_data = newbuf + (buf->user_data - buf->data); |
---|
[4989] | 515 | buf->user_len = len; |
---|
[2334] | 516 | buf->data = newbuf; |
---|
[4989] | 517 | buf->len = totlen; |
---|
[2334] | 518 | } else { |
---|
| 519 | buf->user_len = len; |
---|
| 520 | } |
---|
[0] | 521 | |
---|
| 522 | return 0; |
---|
| 523 | } |
---|
| 524 | |
---|
| 525 | int roar_buffer_get_len (struct roar_buffer * buf, size_t * len) { |
---|
[4905] | 526 | _ckbuf(0) |
---|
[0] | 527 | |
---|
| 528 | *len = buf->user_len; |
---|
| 529 | |
---|
| 530 | return 0; |
---|
| 531 | } |
---|
| 532 | |
---|
[1215] | 533 | int roar_buffer_set_flag (struct roar_buffer * buf, int flag, int reset) { |
---|
[4905] | 534 | _ckbuf(0) |
---|
[1215] | 535 | |
---|
| 536 | buf->flags |= flag; |
---|
| 537 | |
---|
| 538 | if ( reset ) |
---|
| 539 | buf->flags -= flag; |
---|
| 540 | |
---|
| 541 | return 0; |
---|
| 542 | } |
---|
| 543 | |
---|
| 544 | int roar_buffer_get_flag (struct roar_buffer * buf, int flag) { |
---|
[4905] | 545 | _ckbuf(0) |
---|
[1215] | 546 | |
---|
| 547 | return buf->flags & flag; |
---|
| 548 | } |
---|
| 549 | |
---|
[46] | 550 | int roar_buffer_duplicate (struct roar_buffer * buf, struct roar_buffer ** copy) { |
---|
| 551 | struct roar_buffer * cur = buf; |
---|
| 552 | struct roar_buffer * new; |
---|
[48] | 553 | void * od, * nd; |
---|
[4905] | 554 | int err; |
---|
| 555 | |
---|
| 556 | _ckbuf(copy == NULL) |
---|
[46] | 557 | |
---|
| 558 | *copy = NULL; |
---|
| 559 | |
---|
[5111] | 560 | // TODO: This function does not handle ring buffers. |
---|
| 561 | // FIXME: This function does not error out in case of wrong buffer type in buf. |
---|
| 562 | // TODO: This function does not handle buffer meta data. |
---|
| 563 | |
---|
[4905] | 564 | while (cur != NULL) { |
---|
[46] | 565 | if ( roar_buffer_new(&new, cur->user_len) == -1 ) { |
---|
[4905] | 566 | err = roar_error; |
---|
[46] | 567 | roar_buffer_free(*copy); |
---|
[4905] | 568 | roar_err_set(err); |
---|
[46] | 569 | return -1; |
---|
| 570 | } |
---|
| 571 | |
---|
| 572 | if ( *copy == NULL ) |
---|
| 573 | *copy = new; |
---|
| 574 | |
---|
[5111] | 575 | _LIBROAR_IGNORE_RET(roar_buffer_get_data(cur, &od)); |
---|
| 576 | _LIBROAR_IGNORE_RET(roar_buffer_get_data(new, &nd)); |
---|
[48] | 577 | memcpy(nd, od, cur->user_len); |
---|
| 578 | |
---|
[5111] | 579 | _LIBROAR_IGNORE_RET(roar_buffer_add(*copy, new)); |
---|
[46] | 580 | |
---|
| 581 | cur = cur->next; |
---|
| 582 | } |
---|
[4905] | 583 | |
---|
[46] | 584 | return 0; |
---|
| 585 | } |
---|
| 586 | |
---|
[7] | 587 | int roar_buffer_ring_stats (struct roar_buffer * buf, struct roar_buffer_stats * stats) { |
---|
[5131] | 588 | ROAR_DBG("roar_buffer_ring_stats(buf=%p, stats=%p) = ?", buf, stats); |
---|
| 589 | |
---|
[4905] | 590 | _ckbuf(0) |
---|
[7] | 591 | |
---|
[5131] | 592 | ROAR_DBG("roar_buffer_ring_stats(buf=%p, stats=%p) = ?", buf, stats); |
---|
| 593 | |
---|
[7] | 594 | stats->parts = 0; |
---|
| 595 | stats->bytes = 0; |
---|
| 596 | stats->memory_usage = 0; |
---|
| 597 | |
---|
[4905] | 598 | while (buf != NULL ) { |
---|
[7] | 599 | stats->parts++; |
---|
| 600 | stats->bytes += buf->user_len; |
---|
| 601 | stats->memory_usage += buf->len + sizeof(struct roar_buffer); |
---|
| 602 | buf = buf->next; |
---|
| 603 | } |
---|
| 604 | |
---|
| 605 | return 0; |
---|
| 606 | } |
---|
| 607 | |
---|
[3020] | 608 | int roar_buffer_ring_read (struct roar_buffer * buf, void * data, size_t * len) { |
---|
[4615] | 609 | struct roar_buffer_ring * ring; |
---|
| 610 | size_t havelen; |
---|
| 611 | size_t done; |
---|
| 612 | size_t tmp; |
---|
| 613 | |
---|
[4905] | 614 | _ckbuf(len == NULL) |
---|
| 615 | |
---|
[3020] | 616 | if ( buf == NULL || len == NULL ) |
---|
| 617 | return -1; |
---|
| 618 | |
---|
[4905] | 619 | if ( data == NULL && *len != 0 ) { |
---|
| 620 | roar_err_set(ROAR_ERROR_FAULT); |
---|
[3020] | 621 | return -1; |
---|
[4905] | 622 | } |
---|
[3020] | 623 | |
---|
[4905] | 624 | if ( !(buf->flags & ROAR_BUFFER_FLAG_RING) ) { |
---|
| 625 | roar_err_set(ROAR_ERROR_TYPEMM); |
---|
[3020] | 626 | return -1; |
---|
[4905] | 627 | } |
---|
[3020] | 628 | |
---|
| 629 | if ( *len == 0 ) |
---|
| 630 | return 0; |
---|
| 631 | |
---|
| 632 | // we may handle this later: |
---|
[4905] | 633 | if ( *len > buf->user_len ) { |
---|
| 634 | roar_err_set(ROAR_ERROR_NOTSUP); |
---|
[3020] | 635 | return -1; |
---|
[4905] | 636 | } |
---|
[3020] | 637 | |
---|
[4615] | 638 | if ( (buf->flags & ROAR_BUFFER_FLAG_FREE_RUNNING) ) { |
---|
| 639 | if ( buf->meta.ring.read_pos >= buf->user_len ) |
---|
| 640 | buf->meta.ring.read_pos -= buf->user_len; |
---|
[3020] | 641 | |
---|
[4615] | 642 | if ( (*len + buf->meta.ring.read_pos) > buf->user_len ) { |
---|
| 643 | // wraped mode: |
---|
| 644 | memcpy(data, buf->user_data+buf->meta.ring.read_pos, buf->user_len - buf->meta.ring.read_pos); |
---|
| 645 | memcpy(data, buf->user_data, *len + buf->meta.ring.read_pos - buf->user_len); |
---|
| 646 | |
---|
| 647 | buf->meta.ring.read_pos += *len; |
---|
| 648 | buf->meta.ring.read_pos -= buf->user_len; |
---|
| 649 | return 0; |
---|
| 650 | } else { |
---|
| 651 | // unwarped mode: |
---|
| 652 | memcpy(data, buf->user_data+buf->meta.ring.read_pos, *len); |
---|
| 653 | buf->meta.ring.read_pos += *len; |
---|
| 654 | return 0; |
---|
| 655 | } |
---|
| 656 | } else { |
---|
| 657 | ring = &(buf->meta.ring); |
---|
| 658 | |
---|
| 659 | if ( ring->read_pos == ring->write_pos ) { |
---|
| 660 | *len = 0; |
---|
| 661 | return 0; |
---|
| 662 | } else if ( ring->read_pos < ring->write_pos ) { |
---|
| 663 | havelen = ring->write_pos - ring->read_pos; |
---|
| 664 | |
---|
| 665 | if ( havelen > *len ) |
---|
| 666 | havelen = *len; |
---|
| 667 | |
---|
| 668 | memcpy(data, buf->user_data+ring->read_pos, havelen); |
---|
| 669 | ring->read_pos += havelen; |
---|
[3020] | 670 | |
---|
[4615] | 671 | *len = havelen; |
---|
| 672 | return 0; |
---|
| 673 | } else { // write_pos < read_pos |
---|
| 674 | done = 0; |
---|
| 675 | |
---|
| 676 | // first pass: use data up to end of buffer |
---|
| 677 | |
---|
| 678 | havelen = buf->user_len - ring->read_pos; |
---|
| 679 | |
---|
| 680 | if ( havelen > *len ) |
---|
| 681 | havelen = *len; |
---|
| 682 | |
---|
| 683 | memcpy(data, buf->user_data+ring->read_pos, havelen); |
---|
| 684 | ring->read_pos += havelen; |
---|
| 685 | |
---|
| 686 | done += havelen; |
---|
| 687 | |
---|
| 688 | if ( ring->read_pos == buf->user_len ) { |
---|
| 689 | ring->read_pos = 0; |
---|
| 690 | } |
---|
| 691 | |
---|
| 692 | // second pass: use data from strat of buffer to write pointer |
---|
| 693 | |
---|
| 694 | if ( *len > done ) { |
---|
| 695 | tmp = *len - done; |
---|
| 696 | if ( roar_buffer_ring_read(buf, data+done, &tmp) == 0 ) { |
---|
| 697 | done += tmp; |
---|
| 698 | } |
---|
| 699 | } |
---|
| 700 | |
---|
| 701 | *len = done; |
---|
| 702 | return 0; |
---|
| 703 | } |
---|
[3020] | 704 | } |
---|
| 705 | |
---|
[4905] | 706 | roar_err_set(ROAR_ERROR_UNKNOWN); |
---|
[3020] | 707 | return -1; |
---|
| 708 | } |
---|
| 709 | |
---|
| 710 | int roar_buffer_ring_write (struct roar_buffer * buf, void * data, size_t * len) { |
---|
[4624] | 711 | struct roar_buffer_ring * ring; |
---|
| 712 | size_t havelen; |
---|
| 713 | size_t done; |
---|
| 714 | size_t tmp; |
---|
| 715 | |
---|
[4625] | 716 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = ?", buf, data, len); |
---|
| 717 | |
---|
[4905] | 718 | _ckbuf(len == NULL) |
---|
[3020] | 719 | |
---|
[4905] | 720 | if ( data == NULL && *len != 0 ) { |
---|
| 721 | roar_err_set(ROAR_ERROR_FAULT); |
---|
[3020] | 722 | return -1; |
---|
[4905] | 723 | } |
---|
[3020] | 724 | |
---|
[4905] | 725 | if ( !(buf->flags & ROAR_BUFFER_FLAG_RING) ) { |
---|
| 726 | roar_err_set(ROAR_ERROR_TYPEMM); |
---|
[3020] | 727 | return -1; |
---|
[4905] | 728 | } |
---|
[3020] | 729 | |
---|
| 730 | if ( *len == 0 ) |
---|
| 731 | return 0; |
---|
| 732 | |
---|
| 733 | // we may handle this later: |
---|
[4905] | 734 | if ( *len > buf->user_len ) { |
---|
| 735 | roar_err_set(ROAR_ERROR_NOTSUP); |
---|
[3020] | 736 | return -1; |
---|
[4905] | 737 | } |
---|
[3020] | 738 | |
---|
[4615] | 739 | if ( (buf->flags & ROAR_BUFFER_FLAG_FREE_RUNNING) ) { |
---|
| 740 | if ( buf->meta.ring.write_pos >= buf->user_len ) |
---|
| 741 | buf->meta.ring.write_pos -= buf->user_len; |
---|
[3020] | 742 | |
---|
[4615] | 743 | if ( (*len + buf->meta.ring.write_pos) > buf->user_len ) { |
---|
| 744 | // wraped mode: |
---|
| 745 | memcpy(buf->user_data+buf->meta.ring.write_pos, data, buf->user_len - buf->meta.ring.write_pos); |
---|
| 746 | memcpy(buf->user_data, data, *len + buf->meta.ring.write_pos - buf->user_len); |
---|
[3020] | 747 | |
---|
[4615] | 748 | buf->meta.ring.write_pos += *len; |
---|
| 749 | buf->meta.ring.write_pos -= buf->user_len; |
---|
| 750 | return 0; |
---|
| 751 | } else { |
---|
| 752 | // unwarped mode: |
---|
| 753 | memcpy(buf->user_data+buf->meta.ring.write_pos, data, *len); |
---|
| 754 | buf->meta.ring.write_pos += *len; |
---|
| 755 | return 0; |
---|
| 756 | } |
---|
[3020] | 757 | } else { |
---|
[4624] | 758 | ring = &(buf->meta.ring); |
---|
| 759 | done = 0; |
---|
| 760 | |
---|
| 761 | 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); |
---|
| 762 | |
---|
| 763 | if ( ring->write_pos >= ring->read_pos ) { |
---|
[4625] | 764 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = ?", buf, data, len); |
---|
| 765 | |
---|
[4624] | 766 | havelen = buf->user_len - ring->write_pos; |
---|
| 767 | |
---|
| 768 | if ( ring->read_pos == 0 ) |
---|
| 769 | havelen--; |
---|
| 770 | |
---|
| 771 | if ( havelen > *len ) |
---|
| 772 | havelen = *len; |
---|
| 773 | |
---|
| 774 | memcpy(buf->user_data+ring->write_pos, data, havelen); |
---|
| 775 | |
---|
| 776 | done += havelen; |
---|
| 777 | ring->write_pos += havelen; |
---|
| 778 | |
---|
| 779 | if ( ring->write_pos == buf->user_len ) |
---|
| 780 | ring->write_pos = 0; |
---|
| 781 | |
---|
| 782 | if ( *len > done && ring->read_pos != 0 ) { |
---|
| 783 | tmp = *len - done; |
---|
| 784 | if ( roar_buffer_ring_write(buf, data+done, &tmp) == 0 ) { |
---|
| 785 | done += tmp; |
---|
| 786 | } |
---|
| 787 | } |
---|
| 788 | |
---|
| 789 | *len = done; |
---|
[4625] | 790 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = 0", buf, data, len); |
---|
[4624] | 791 | return 0; |
---|
| 792 | } else { |
---|
[4625] | 793 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = ?", buf, data, len); |
---|
| 794 | |
---|
[4624] | 795 | // test for buffer-is-full: |
---|
| 796 | if ( (ring->write_pos + 1) == ring->read_pos ) { |
---|
| 797 | *len = 0; |
---|
[4625] | 798 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = 0", buf, data, len); |
---|
[4624] | 799 | return 0; |
---|
| 800 | } |
---|
| 801 | |
---|
[4625] | 802 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = ?", buf, data, len); |
---|
| 803 | |
---|
[4624] | 804 | havelen = ring->read_pos - ring->write_pos - 1; |
---|
| 805 | |
---|
| 806 | if ( havelen > *len ) |
---|
| 807 | havelen = *len; |
---|
| 808 | |
---|
| 809 | memcpy(buf->user_data+ring->write_pos, data, havelen); |
---|
| 810 | |
---|
[4625] | 811 | ring->write_pos += havelen; |
---|
[4624] | 812 | *len = havelen; |
---|
[4625] | 813 | |
---|
| 814 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = 0", buf, data, len); |
---|
[4624] | 815 | return 0; |
---|
| 816 | } |
---|
[3020] | 817 | } |
---|
| 818 | |
---|
[4905] | 819 | roar_err_set(ROAR_ERROR_UNKNOWN); |
---|
[3020] | 820 | return -1; |
---|
| 821 | } |
---|
| 822 | |
---|
[4625] | 823 | int roar_buffer_ring_avail(struct roar_buffer * buf, size_t * readlen, size_t * writelen) { |
---|
| 824 | struct roar_buffer_ring * ring; |
---|
| 825 | size_t have; |
---|
| 826 | |
---|
[4905] | 827 | _ckbuf(0) |
---|
[4625] | 828 | |
---|
[4905] | 829 | if ( !(buf->flags & ROAR_BUFFER_FLAG_RING) ) { |
---|
| 830 | roar_err_set(ROAR_ERROR_TYPEMM); |
---|
[4625] | 831 | return -1; |
---|
[4905] | 832 | } |
---|
[4625] | 833 | |
---|
| 834 | ring = &(buf->meta.ring); |
---|
| 835 | |
---|
| 836 | ROAR_DBG("roar_buffer_ring_avail(buf=%p, readlen=%p, writelen=%p) = ?", buf, readlen, writelen); |
---|
| 837 | |
---|
| 838 | if ( readlen != NULL ) { |
---|
| 839 | have = 0; |
---|
| 840 | |
---|
| 841 | if ( ring->write_pos >= ring->read_pos ) { |
---|
| 842 | have = ring->write_pos - ring->read_pos; |
---|
| 843 | } else { |
---|
| 844 | have = buf->user_len - ring->read_pos; |
---|
| 845 | have += ring->write_pos; |
---|
| 846 | have -= 1; |
---|
| 847 | } |
---|
| 848 | |
---|
| 849 | *readlen = have; |
---|
| 850 | ROAR_DBG("roar_buffer_ring_avail(buf=%p, readlen=%p, writelen=%p): readlen=%llu", buf, readlen, writelen, (unsigned long long int)have); |
---|
| 851 | } |
---|
| 852 | |
---|
| 853 | if ( writelen != NULL ) { |
---|
| 854 | have = 0; |
---|
| 855 | |
---|
| 856 | if ( ring->read_pos > ring->write_pos ) { |
---|
| 857 | have = ring->read_pos - ring->write_pos - 1; |
---|
| 858 | } else { |
---|
| 859 | have = buf->user_len - ring->write_pos; |
---|
| 860 | have += ring->read_pos; |
---|
| 861 | have -= 1; |
---|
| 862 | } |
---|
| 863 | |
---|
| 864 | *writelen = have; |
---|
| 865 | ROAR_DBG("roar_buffer_ring_avail(buf=%p, readlen=%p, writelen=%p): readlen=%llu", buf, readlen, writelen, (unsigned long long int)have); |
---|
| 866 | } |
---|
| 867 | |
---|
| 868 | ROAR_DBG("roar_buffer_ring_avail(buf=%p, readlen=%p, writelen=%p) = 0", buf, readlen, writelen); |
---|
| 869 | |
---|
| 870 | return 0; |
---|
| 871 | } |
---|
| 872 | |
---|
[4629] | 873 | int roar_buffer_ring_reset(struct roar_buffer * buf) { |
---|
[4905] | 874 | _ckbuf(0) |
---|
[4629] | 875 | |
---|
[4905] | 876 | if ( !(buf->flags & ROAR_BUFFER_FLAG_RING) ) { |
---|
| 877 | roar_err_set(ROAR_ERROR_TYPEMM); |
---|
[4629] | 878 | return -1; |
---|
[4905] | 879 | } |
---|
[4629] | 880 | |
---|
| 881 | buf->meta.ring.read_pos = buf->meta.ring.write_pos = 0; |
---|
| 882 | |
---|
| 883 | return 0; |
---|
| 884 | } |
---|
| 885 | |
---|
[0] | 886 | //ll |
---|