[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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| 298 | int roar_buffer_get_next (struct roar_buffer * buf, struct roar_buffer ** next) { |
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[4905] | 299 | _ckbuf(0) |
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[0] | 300 | |
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| 301 | *next = buf->next; |
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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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[3020] | 306 | int roar_buffer_ring_new (struct roar_buffer ** buf, size_t len, int free_running) { |
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| 307 | struct roar_buffer * n; |
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| 308 | |
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[5011] | 309 | _ckbuf_free(0) |
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[4905] | 310 | |
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| 311 | if ( len == 0 ) { |
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| 312 | roar_err_set(ROAR_ERROR_RANGE); |
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[3020] | 313 | return -1; |
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[4905] | 314 | } |
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[3020] | 315 | |
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| 316 | // just to be sure: |
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| 317 | *buf = NULL; |
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| 318 | |
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| 319 | if ( roar_buffer_new(&n, len) == -1 ) |
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| 320 | return -1; |
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| 321 | |
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| 322 | n->flags |= ROAR_BUFFER_FLAG_RING; |
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| 323 | |
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| 324 | if ( free_running ) |
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| 325 | n->flags |= ROAR_BUFFER_FLAG_FREE_RUNNING; |
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| 326 | |
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| 327 | n->meta.ring.read_pos = 0; |
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| 328 | n->meta.ring.write_pos = 0; |
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| 329 | |
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| 330 | memset(n->data, 0, n->len); |
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| 331 | |
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| 332 | *buf = n; |
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| 333 | |
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| 334 | return 0; |
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| 335 | } |
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| 336 | |
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[0] | 337 | int roar_buffer_get_data (struct roar_buffer * buf, void ** data) { |
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[4905] | 338 | _ckbuf(0) |
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[0] | 339 | |
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| 340 | *data = buf->user_data; |
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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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| 345 | int roar_buffer_set_offset (struct roar_buffer * buf, size_t off) { |
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[4905] | 346 | _ckbuf(0) |
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| 347 | |
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| 348 | if ( off > buf->user_len ) { |
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| 349 | roar_err_set(ROAR_ERROR_RANGE); |
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[0] | 350 | return -1; |
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[4905] | 351 | } |
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[0] | 352 | |
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| 353 | buf->user_len -= off; |
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| 354 | buf->user_data += off; |
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| 355 | |
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| 356 | return 0; |
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| 357 | } |
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| 358 | |
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[904] | 359 | int roar_buffer_shift_out (struct roar_buffer ** buf, void * data, size_t * len) { |
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| 360 | size_t todo, cl; |
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| 361 | struct roar_buffer * cur; |
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| 362 | void * cd; |
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| 363 | |
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[5011] | 364 | _ckbuf_free(len == NULL || data == NULL); |
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[904] | 365 | |
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[996] | 366 | if ( *buf == NULL ) { |
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| 367 | 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] | 368 | roar_err_set(ROAR_ERROR_FAULT); |
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[904] | 369 | return -1; |
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[996] | 370 | } |
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[904] | 371 | |
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| 372 | todo = *len; |
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| 373 | cur = *buf; |
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| 374 | |
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| 375 | *len = 0; |
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| 376 | |
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[2066] | 377 | while (todo && cur != NULL) { |
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[904] | 378 | ROAR_DBG("roar_buffer_shift_out(*): todo=%u, cur=%p", (unsigned int) todo, cur); |
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| 379 | |
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[5131] | 380 | _ckmem_corruption(cur, 0); |
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[5013] | 381 | |
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[904] | 382 | if ( roar_buffer_get_len(cur, &cl) == -1 ) |
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| 383 | return -1; |
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| 384 | |
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| 385 | if ( cl > todo ) { |
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| 386 | if ( roar_buffer_get_data(cur, &cd) == -1 ) |
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| 387 | return -1; |
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| 388 | |
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| 389 | cl = todo; |
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| 390 | |
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| 391 | memcpy(data, cd, cl); |
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| 392 | todo -= cl; |
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| 393 | data += cl; |
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| 394 | *len += cl; |
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| 395 | |
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| 396 | if ( roar_buffer_set_offset(cur, cl) == -1 ) |
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| 397 | return -1; |
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| 398 | } else { |
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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 | memcpy(data, cd, cl); |
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| 403 | todo -= cl; |
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| 404 | data += cl; |
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| 405 | *len += cl; |
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| 406 | |
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| 407 | if ( roar_buffer_next(&cur) == -1 ) |
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| 408 | return -1; |
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| 409 | } |
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| 410 | |
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| 411 | /* |
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| 412 | if ( cur == NULL ) |
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| 413 | break; |
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| 414 | */ |
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| 415 | } |
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| 416 | |
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| 417 | *buf = cur; |
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| 418 | |
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[996] | 419 | return 0; |
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[904] | 420 | } |
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| 421 | |
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[0] | 422 | int roar_buffer_set_meta (struct roar_buffer * buf, void * meta) { |
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[4905] | 423 | _ckbuf(0) |
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[0] | 424 | |
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[2333] | 425 | buf->meta.vp = meta; |
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[0] | 426 | |
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| 427 | return 0; |
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| 428 | } |
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| 429 | |
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| 430 | int roar_buffer_get_meta (struct roar_buffer * buf, void ** meta) { |
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[4905] | 431 | _ckbuf(meta == NULL) |
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[2333] | 432 | |
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| 433 | *meta = buf->meta.vp; |
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| 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_set_meta_i32(struct roar_buffer * buf, int32_t meta) { |
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[4905] | 439 | _ckbuf(0) |
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[0] | 440 | |
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[2333] | 441 | buf->meta.i32 = meta; |
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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_get_meta_i32(struct roar_buffer * buf, int32_t * meta) { |
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[4905] | 447 | _ckbuf(meta == NULL) |
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[2333] | 448 | |
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| 449 | *meta = buf->meta.i32; |
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[0] | 450 | |
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| 451 | return 0; |
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| 452 | } |
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| 453 | |
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[4901] | 454 | int roar_buffer_set_type (struct roar_buffer * buf, int type) { |
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[4905] | 455 | _ckbuf(0) |
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[4901] | 456 | |
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[4903] | 457 | switch (type) { |
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| 458 | case ROAR_VIO_DFT_RAW: |
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| 459 | case ROAR_VIO_DFT_PACKET: |
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| 460 | case ROAR_VIO_DFT_UNFRAMED: |
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[4988] | 461 | case ROAR_VIO_DFT_OGG_PACKET: |
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| 462 | case ROAR_VIO_DFT_OGG_PAGE: |
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[4903] | 463 | break; |
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| 464 | default: |
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[4905] | 465 | roar_err_set(ROAR_ERROR_NOTSUP); |
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[4903] | 466 | return -1; |
---|
| 467 | } |
---|
| 468 | |
---|
[4901] | 469 | buf->type = type; |
---|
| 470 | |
---|
| 471 | return 0; |
---|
| 472 | } |
---|
| 473 | |
---|
| 474 | int roar_buffer_get_type (struct roar_buffer * buf, int * type) { |
---|
[4905] | 475 | _ckbuf(type == NULL) |
---|
[4901] | 476 | |
---|
| 477 | *type = buf->type; |
---|
| 478 | |
---|
| 479 | return 0; |
---|
| 480 | } |
---|
| 481 | |
---|
[0] | 482 | int roar_buffer_set_len (struct roar_buffer * buf, size_t len) { |
---|
[2334] | 483 | size_t totlen; |
---|
| 484 | void * newbuf; |
---|
| 485 | |
---|
[4905] | 486 | _ckbuf(0) |
---|
[0] | 487 | |
---|
[3032] | 488 | // handle specal case where user length is zero: |
---|
| 489 | if ( len && !buf->user_len ) { |
---|
| 490 | buf->user_data = buf->data; |
---|
| 491 | buf->user_len = buf->len; |
---|
| 492 | } |
---|
| 493 | |
---|
[2334] | 494 | if ( len > buf->user_len ) { |
---|
[3021] | 495 | // we can only enlage a buffer if it's one of our own memory segments |
---|
[4905] | 496 | if ( buf->flags & ROAR_BUFFER_FLAG_NOFREE ) { |
---|
| 497 | roar_err_set(ROAR_ERROR_NOTSUP); |
---|
[3021] | 498 | return -1; |
---|
[4905] | 499 | } |
---|
[3021] | 500 | |
---|
[4989] | 501 | totlen = (buf->len - buf->user_len) + len; |
---|
[3021] | 502 | newbuf = roar_mm_realloc(buf->data, totlen); |
---|
[2334] | 503 | if ( newbuf == NULL ) |
---|
| 504 | return -1; |
---|
| 505 | |
---|
[4988] | 506 | buf->user_data = newbuf + (buf->user_data - buf->data); |
---|
[4989] | 507 | buf->user_len = len; |
---|
[2334] | 508 | buf->data = newbuf; |
---|
[4989] | 509 | buf->len = totlen; |
---|
[2334] | 510 | } else { |
---|
| 511 | buf->user_len = len; |
---|
| 512 | } |
---|
[0] | 513 | |
---|
| 514 | return 0; |
---|
| 515 | } |
---|
| 516 | |
---|
| 517 | int roar_buffer_get_len (struct roar_buffer * buf, size_t * len) { |
---|
[4905] | 518 | _ckbuf(0) |
---|
[0] | 519 | |
---|
| 520 | *len = buf->user_len; |
---|
| 521 | |
---|
| 522 | return 0; |
---|
| 523 | } |
---|
| 524 | |
---|
[1215] | 525 | int roar_buffer_set_flag (struct roar_buffer * buf, int flag, int reset) { |
---|
[4905] | 526 | _ckbuf(0) |
---|
[1215] | 527 | |
---|
| 528 | buf->flags |= flag; |
---|
| 529 | |
---|
| 530 | if ( reset ) |
---|
| 531 | buf->flags -= flag; |
---|
| 532 | |
---|
| 533 | return 0; |
---|
| 534 | } |
---|
| 535 | |
---|
| 536 | int roar_buffer_get_flag (struct roar_buffer * buf, int flag) { |
---|
[4905] | 537 | _ckbuf(0) |
---|
[1215] | 538 | |
---|
| 539 | return buf->flags & flag; |
---|
| 540 | } |
---|
| 541 | |
---|
[46] | 542 | int roar_buffer_duplicate (struct roar_buffer * buf, struct roar_buffer ** copy) { |
---|
| 543 | struct roar_buffer * cur = buf; |
---|
| 544 | struct roar_buffer * new; |
---|
[48] | 545 | void * od, * nd; |
---|
[4905] | 546 | int err; |
---|
| 547 | |
---|
| 548 | _ckbuf(copy == NULL) |
---|
[46] | 549 | |
---|
| 550 | *copy = NULL; |
---|
| 551 | |
---|
[5111] | 552 | // TODO: This function does not handle ring buffers. |
---|
| 553 | // FIXME: This function does not error out in case of wrong buffer type in buf. |
---|
| 554 | // TODO: This function does not handle buffer meta data. |
---|
| 555 | |
---|
[4905] | 556 | while (cur != NULL) { |
---|
[46] | 557 | if ( roar_buffer_new(&new, cur->user_len) == -1 ) { |
---|
[4905] | 558 | err = roar_error; |
---|
[46] | 559 | roar_buffer_free(*copy); |
---|
[4905] | 560 | roar_err_set(err); |
---|
[46] | 561 | return -1; |
---|
| 562 | } |
---|
| 563 | |
---|
| 564 | if ( *copy == NULL ) |
---|
| 565 | *copy = new; |
---|
| 566 | |
---|
[5111] | 567 | _LIBROAR_IGNORE_RET(roar_buffer_get_data(cur, &od)); |
---|
| 568 | _LIBROAR_IGNORE_RET(roar_buffer_get_data(new, &nd)); |
---|
[48] | 569 | memcpy(nd, od, cur->user_len); |
---|
| 570 | |
---|
[5111] | 571 | _LIBROAR_IGNORE_RET(roar_buffer_add(*copy, new)); |
---|
[46] | 572 | |
---|
| 573 | cur = cur->next; |
---|
| 574 | } |
---|
[4905] | 575 | |
---|
[46] | 576 | return 0; |
---|
| 577 | } |
---|
| 578 | |
---|
[7] | 579 | int roar_buffer_ring_stats (struct roar_buffer * buf, struct roar_buffer_stats * stats) { |
---|
[5131] | 580 | ROAR_DBG("roar_buffer_ring_stats(buf=%p, stats=%p) = ?", buf, stats); |
---|
| 581 | |
---|
[4905] | 582 | _ckbuf(0) |
---|
[7] | 583 | |
---|
[5131] | 584 | ROAR_DBG("roar_buffer_ring_stats(buf=%p, stats=%p) = ?", buf, stats); |
---|
| 585 | |
---|
[7] | 586 | stats->parts = 0; |
---|
| 587 | stats->bytes = 0; |
---|
| 588 | stats->memory_usage = 0; |
---|
| 589 | |
---|
[4905] | 590 | while (buf != NULL ) { |
---|
[7] | 591 | stats->parts++; |
---|
| 592 | stats->bytes += buf->user_len; |
---|
| 593 | stats->memory_usage += buf->len + sizeof(struct roar_buffer); |
---|
| 594 | buf = buf->next; |
---|
| 595 | } |
---|
| 596 | |
---|
| 597 | return 0; |
---|
| 598 | } |
---|
| 599 | |
---|
[3020] | 600 | int roar_buffer_ring_read (struct roar_buffer * buf, void * data, size_t * len) { |
---|
[4615] | 601 | struct roar_buffer_ring * ring; |
---|
| 602 | size_t havelen; |
---|
| 603 | size_t done; |
---|
| 604 | size_t tmp; |
---|
| 605 | |
---|
[4905] | 606 | _ckbuf(len == NULL) |
---|
| 607 | |
---|
[3020] | 608 | if ( buf == NULL || len == NULL ) |
---|
| 609 | return -1; |
---|
| 610 | |
---|
[4905] | 611 | if ( data == NULL && *len != 0 ) { |
---|
| 612 | roar_err_set(ROAR_ERROR_FAULT); |
---|
[3020] | 613 | return -1; |
---|
[4905] | 614 | } |
---|
[3020] | 615 | |
---|
[4905] | 616 | if ( !(buf->flags & ROAR_BUFFER_FLAG_RING) ) { |
---|
| 617 | roar_err_set(ROAR_ERROR_TYPEMM); |
---|
[3020] | 618 | return -1; |
---|
[4905] | 619 | } |
---|
[3020] | 620 | |
---|
| 621 | if ( *len == 0 ) |
---|
| 622 | return 0; |
---|
| 623 | |
---|
| 624 | // we may handle this later: |
---|
[4905] | 625 | if ( *len > buf->user_len ) { |
---|
| 626 | roar_err_set(ROAR_ERROR_NOTSUP); |
---|
[3020] | 627 | return -1; |
---|
[4905] | 628 | } |
---|
[3020] | 629 | |
---|
[4615] | 630 | if ( (buf->flags & ROAR_BUFFER_FLAG_FREE_RUNNING) ) { |
---|
| 631 | if ( buf->meta.ring.read_pos >= buf->user_len ) |
---|
| 632 | buf->meta.ring.read_pos -= buf->user_len; |
---|
[3020] | 633 | |
---|
[4615] | 634 | if ( (*len + buf->meta.ring.read_pos) > buf->user_len ) { |
---|
| 635 | // wraped mode: |
---|
| 636 | memcpy(data, buf->user_data+buf->meta.ring.read_pos, buf->user_len - buf->meta.ring.read_pos); |
---|
| 637 | memcpy(data, buf->user_data, *len + buf->meta.ring.read_pos - buf->user_len); |
---|
| 638 | |
---|
| 639 | buf->meta.ring.read_pos += *len; |
---|
| 640 | buf->meta.ring.read_pos -= buf->user_len; |
---|
| 641 | return 0; |
---|
| 642 | } else { |
---|
| 643 | // unwarped mode: |
---|
| 644 | memcpy(data, buf->user_data+buf->meta.ring.read_pos, *len); |
---|
| 645 | buf->meta.ring.read_pos += *len; |
---|
| 646 | return 0; |
---|
| 647 | } |
---|
| 648 | } else { |
---|
| 649 | ring = &(buf->meta.ring); |
---|
| 650 | |
---|
| 651 | if ( ring->read_pos == ring->write_pos ) { |
---|
| 652 | *len = 0; |
---|
| 653 | return 0; |
---|
| 654 | } else if ( ring->read_pos < ring->write_pos ) { |
---|
| 655 | havelen = ring->write_pos - ring->read_pos; |
---|
| 656 | |
---|
| 657 | if ( havelen > *len ) |
---|
| 658 | havelen = *len; |
---|
| 659 | |
---|
| 660 | memcpy(data, buf->user_data+ring->read_pos, havelen); |
---|
| 661 | ring->read_pos += havelen; |
---|
[3020] | 662 | |
---|
[4615] | 663 | *len = havelen; |
---|
| 664 | return 0; |
---|
| 665 | } else { // write_pos < read_pos |
---|
| 666 | done = 0; |
---|
| 667 | |
---|
| 668 | // first pass: use data up to end of buffer |
---|
| 669 | |
---|
| 670 | havelen = buf->user_len - ring->read_pos; |
---|
| 671 | |
---|
| 672 | if ( havelen > *len ) |
---|
| 673 | havelen = *len; |
---|
| 674 | |
---|
| 675 | memcpy(data, buf->user_data+ring->read_pos, havelen); |
---|
| 676 | ring->read_pos += havelen; |
---|
| 677 | |
---|
| 678 | done += havelen; |
---|
| 679 | |
---|
| 680 | if ( ring->read_pos == buf->user_len ) { |
---|
| 681 | ring->read_pos = 0; |
---|
| 682 | } |
---|
| 683 | |
---|
| 684 | // second pass: use data from strat of buffer to write pointer |
---|
| 685 | |
---|
| 686 | if ( *len > done ) { |
---|
| 687 | tmp = *len - done; |
---|
| 688 | if ( roar_buffer_ring_read(buf, data+done, &tmp) == 0 ) { |
---|
| 689 | done += tmp; |
---|
| 690 | } |
---|
| 691 | } |
---|
| 692 | |
---|
| 693 | *len = done; |
---|
| 694 | return 0; |
---|
| 695 | } |
---|
[3020] | 696 | } |
---|
| 697 | |
---|
[4905] | 698 | roar_err_set(ROAR_ERROR_UNKNOWN); |
---|
[3020] | 699 | return -1; |
---|
| 700 | } |
---|
| 701 | |
---|
| 702 | int roar_buffer_ring_write (struct roar_buffer * buf, void * data, size_t * len) { |
---|
[4624] | 703 | struct roar_buffer_ring * ring; |
---|
| 704 | size_t havelen; |
---|
| 705 | size_t done; |
---|
| 706 | size_t tmp; |
---|
| 707 | |
---|
[4625] | 708 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = ?", buf, data, len); |
---|
| 709 | |
---|
[4905] | 710 | _ckbuf(len == NULL) |
---|
[3020] | 711 | |
---|
[4905] | 712 | if ( data == NULL && *len != 0 ) { |
---|
| 713 | roar_err_set(ROAR_ERROR_FAULT); |
---|
[3020] | 714 | return -1; |
---|
[4905] | 715 | } |
---|
[3020] | 716 | |
---|
[4905] | 717 | if ( !(buf->flags & ROAR_BUFFER_FLAG_RING) ) { |
---|
| 718 | roar_err_set(ROAR_ERROR_TYPEMM); |
---|
[3020] | 719 | return -1; |
---|
[4905] | 720 | } |
---|
[3020] | 721 | |
---|
| 722 | if ( *len == 0 ) |
---|
| 723 | return 0; |
---|
| 724 | |
---|
| 725 | // we may handle this later: |
---|
[4905] | 726 | if ( *len > buf->user_len ) { |
---|
| 727 | roar_err_set(ROAR_ERROR_NOTSUP); |
---|
[3020] | 728 | return -1; |
---|
[4905] | 729 | } |
---|
[3020] | 730 | |
---|
[4615] | 731 | if ( (buf->flags & ROAR_BUFFER_FLAG_FREE_RUNNING) ) { |
---|
| 732 | if ( buf->meta.ring.write_pos >= buf->user_len ) |
---|
| 733 | buf->meta.ring.write_pos -= buf->user_len; |
---|
[3020] | 734 | |
---|
[4615] | 735 | if ( (*len + buf->meta.ring.write_pos) > buf->user_len ) { |
---|
| 736 | // wraped mode: |
---|
| 737 | memcpy(buf->user_data+buf->meta.ring.write_pos, data, buf->user_len - buf->meta.ring.write_pos); |
---|
| 738 | memcpy(buf->user_data, data, *len + buf->meta.ring.write_pos - buf->user_len); |
---|
[3020] | 739 | |
---|
[4615] | 740 | buf->meta.ring.write_pos += *len; |
---|
| 741 | buf->meta.ring.write_pos -= buf->user_len; |
---|
| 742 | return 0; |
---|
| 743 | } else { |
---|
| 744 | // unwarped mode: |
---|
| 745 | memcpy(buf->user_data+buf->meta.ring.write_pos, data, *len); |
---|
| 746 | buf->meta.ring.write_pos += *len; |
---|
| 747 | return 0; |
---|
| 748 | } |
---|
[3020] | 749 | } else { |
---|
[4624] | 750 | ring = &(buf->meta.ring); |
---|
| 751 | done = 0; |
---|
| 752 | |
---|
| 753 | 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); |
---|
| 754 | |
---|
| 755 | if ( ring->write_pos >= ring->read_pos ) { |
---|
[4625] | 756 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = ?", buf, data, len); |
---|
| 757 | |
---|
[4624] | 758 | havelen = buf->user_len - ring->write_pos; |
---|
| 759 | |
---|
| 760 | if ( ring->read_pos == 0 ) |
---|
| 761 | havelen--; |
---|
| 762 | |
---|
| 763 | if ( havelen > *len ) |
---|
| 764 | havelen = *len; |
---|
| 765 | |
---|
| 766 | memcpy(buf->user_data+ring->write_pos, data, havelen); |
---|
| 767 | |
---|
| 768 | done += havelen; |
---|
| 769 | ring->write_pos += havelen; |
---|
| 770 | |
---|
| 771 | if ( ring->write_pos == buf->user_len ) |
---|
| 772 | ring->write_pos = 0; |
---|
| 773 | |
---|
| 774 | if ( *len > done && ring->read_pos != 0 ) { |
---|
| 775 | tmp = *len - done; |
---|
| 776 | if ( roar_buffer_ring_write(buf, data+done, &tmp) == 0 ) { |
---|
| 777 | done += tmp; |
---|
| 778 | } |
---|
| 779 | } |
---|
| 780 | |
---|
| 781 | *len = done; |
---|
[4625] | 782 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = 0", buf, data, len); |
---|
[4624] | 783 | return 0; |
---|
| 784 | } else { |
---|
[4625] | 785 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = ?", buf, data, len); |
---|
| 786 | |
---|
[4624] | 787 | // test for buffer-is-full: |
---|
| 788 | if ( (ring->write_pos + 1) == ring->read_pos ) { |
---|
| 789 | *len = 0; |
---|
[4625] | 790 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = 0", buf, data, len); |
---|
[4624] | 791 | return 0; |
---|
| 792 | } |
---|
| 793 | |
---|
[4625] | 794 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = ?", buf, data, len); |
---|
| 795 | |
---|
[4624] | 796 | havelen = ring->read_pos - ring->write_pos - 1; |
---|
| 797 | |
---|
| 798 | if ( havelen > *len ) |
---|
| 799 | havelen = *len; |
---|
| 800 | |
---|
| 801 | memcpy(buf->user_data+ring->write_pos, data, havelen); |
---|
| 802 | |
---|
[4625] | 803 | ring->write_pos += havelen; |
---|
[4624] | 804 | *len = havelen; |
---|
[4625] | 805 | |
---|
| 806 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = 0", buf, data, len); |
---|
[4624] | 807 | return 0; |
---|
| 808 | } |
---|
[3020] | 809 | } |
---|
| 810 | |
---|
[4905] | 811 | roar_err_set(ROAR_ERROR_UNKNOWN); |
---|
[3020] | 812 | return -1; |
---|
| 813 | } |
---|
| 814 | |
---|
[4625] | 815 | int roar_buffer_ring_avail(struct roar_buffer * buf, size_t * readlen, size_t * writelen) { |
---|
| 816 | struct roar_buffer_ring * ring; |
---|
| 817 | size_t have; |
---|
| 818 | |
---|
[4905] | 819 | _ckbuf(0) |
---|
[4625] | 820 | |
---|
[4905] | 821 | if ( !(buf->flags & ROAR_BUFFER_FLAG_RING) ) { |
---|
| 822 | roar_err_set(ROAR_ERROR_TYPEMM); |
---|
[4625] | 823 | return -1; |
---|
[4905] | 824 | } |
---|
[4625] | 825 | |
---|
| 826 | ring = &(buf->meta.ring); |
---|
| 827 | |
---|
| 828 | ROAR_DBG("roar_buffer_ring_avail(buf=%p, readlen=%p, writelen=%p) = ?", buf, readlen, writelen); |
---|
| 829 | |
---|
| 830 | if ( readlen != NULL ) { |
---|
| 831 | have = 0; |
---|
| 832 | |
---|
| 833 | if ( ring->write_pos >= ring->read_pos ) { |
---|
| 834 | have = ring->write_pos - ring->read_pos; |
---|
| 835 | } else { |
---|
| 836 | have = buf->user_len - ring->read_pos; |
---|
| 837 | have += ring->write_pos; |
---|
| 838 | have -= 1; |
---|
| 839 | } |
---|
| 840 | |
---|
| 841 | *readlen = have; |
---|
| 842 | ROAR_DBG("roar_buffer_ring_avail(buf=%p, readlen=%p, writelen=%p): readlen=%llu", buf, readlen, writelen, (unsigned long long int)have); |
---|
| 843 | } |
---|
| 844 | |
---|
| 845 | if ( writelen != NULL ) { |
---|
| 846 | have = 0; |
---|
| 847 | |
---|
| 848 | if ( ring->read_pos > ring->write_pos ) { |
---|
| 849 | have = ring->read_pos - ring->write_pos - 1; |
---|
| 850 | } else { |
---|
| 851 | have = buf->user_len - ring->write_pos; |
---|
| 852 | have += ring->read_pos; |
---|
| 853 | have -= 1; |
---|
| 854 | } |
---|
| 855 | |
---|
| 856 | *writelen = have; |
---|
| 857 | ROAR_DBG("roar_buffer_ring_avail(buf=%p, readlen=%p, writelen=%p): readlen=%llu", buf, readlen, writelen, (unsigned long long int)have); |
---|
| 858 | } |
---|
| 859 | |
---|
| 860 | ROAR_DBG("roar_buffer_ring_avail(buf=%p, readlen=%p, writelen=%p) = 0", buf, readlen, writelen); |
---|
| 861 | |
---|
| 862 | return 0; |
---|
| 863 | } |
---|
| 864 | |
---|
[4629] | 865 | int roar_buffer_ring_reset(struct roar_buffer * buf) { |
---|
[4905] | 866 | _ckbuf(0) |
---|
[4629] | 867 | |
---|
[4905] | 868 | if ( !(buf->flags & ROAR_BUFFER_FLAG_RING) ) { |
---|
| 869 | roar_err_set(ROAR_ERROR_TYPEMM); |
---|
[4629] | 870 | return -1; |
---|
[4905] | 871 | } |
---|
[4629] | 872 | |
---|
| 873 | buf->meta.ring.read_pos = buf->meta.ring.write_pos = 0; |
---|
| 874 | |
---|
| 875 | return 0; |
---|
| 876 | } |
---|
| 877 | |
---|
[0] | 878 | //ll |
---|