[0] | 1 | //buffer.c: |
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| 2 | |
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[690] | 3 | /* |
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[5823] | 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008-2013 |
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[690] | 5 | * |
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| 6 | * This file is part of libroar a part of RoarAudio, |
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| 7 | * a cross-platform sound system for both, home and professional use. |
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| 8 | * See README for details. |
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| 9 | * |
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| 10 | * This file is free software; you can redistribute it and/or modify |
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| 11 | * it under the terms of the GNU General Public License version 3 |
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| 12 | * as published by the Free Software Foundation. |
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| 13 | * |
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| 14 | * libroar is distributed in the hope that it will be useful, |
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | * GNU General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU General Public License |
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| 20 | * along with this software; see the file COPYING. If not, write to |
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[3517] | 21 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
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| 22 | * Boston, MA 02110-1301, USA. |
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[690] | 23 | * |
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| 24 | * NOTE for everyone want's to change something and send patches: |
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| 25 | * read README and HACKING! There a addition information on |
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| 26 | * the license of this document you need to read before you send |
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| 27 | * any patches. |
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| 28 | * |
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| 29 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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| 30 | * or libpulse*: |
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| 31 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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| 32 | * and are therefore GPL. Because of this it may be illigal to use |
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| 33 | * them with any software that uses libesd, libartsc or libpulse*. |
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| 34 | */ |
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| 35 | |
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[0] | 36 | #include "libroar.h" |
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| 37 | |
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[4516] | 38 | struct roar_buffer_ring { |
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| 39 | size_t read_pos; |
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| 40 | size_t write_pos; |
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| 41 | }; |
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| 42 | |
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| 43 | struct roar_buffer { |
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| 44 | size_t refc; |
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| 45 | size_t len; |
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| 46 | size_t user_len; |
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| 47 | int flags; |
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| 48 | void * data; |
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| 49 | void * user_data; |
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| 50 | union { |
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| 51 | void * vp; |
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| 52 | int32_t i32; |
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| 53 | struct roar_buffer_ring ring; |
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| 54 | } meta; |
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[4901] | 55 | int type; |
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[4516] | 56 | struct roar_buffer * next; |
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| 57 | }; |
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[1215] | 58 | |
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[5011] | 59 | #define _ckbuf_free(m) if ( buf == NULL || (m) ) { roar_err_set(ROAR_ERROR_FAULT); return -1; } |
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[5131] | 60 | #define _ckbuf(m) if ( _ckmem_corruption(buf, (m)) == -1 ) return -1; |
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| 61 | |
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| 62 | // if we use the 'inline' keyword here the program segfaults. why? |
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| 63 | static int _ckmem_corruption(volatile struct roar_buffer * buf, int m) { |
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| 64 | int flags; |
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| 65 | |
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| 66 | ROAR_DBG("_ckmem_corruption(buf=%p) = ?", buf); |
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[5011] | 67 | |
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[5131] | 68 | // we need to recheck here, why? |
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| 69 | // gcc changes the order of the above macros. why? |
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| 70 | // this is a strange world. |
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| 71 | if ( buf == NULL || m ) { |
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| 72 | ROAR_DBG("_ckmem_corruption(buf=%p) = -1 // FAULT", buf); |
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| 73 | roar_err_set(ROAR_ERROR_FAULT); |
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| 74 | return -1; |
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| 75 | } |
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| 76 | |
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| 77 | ROAR_DBG("_ckmem_corruption(buf=%p) = ?", buf); |
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| 78 | |
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| 79 | flags = buf->flags & (ROAR_BUFFER_FLAG_USEABLE|ROAR_BUFFER_FLAG_FREED); |
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[5011] | 80 | |
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[5652] | 81 | ROAR_DBG("_ckmem_corruption(buf=%p{.flags=0x%.4x, ...}) = ?", buf, buf->flags); |
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[5011] | 82 | |
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| 83 | if ( flags == ROAR_BUFFER_FLAG_USEABLE ) { |
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| 84 | // seems ok, continue with next check. |
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| 85 | } else if ( flags == ROAR_BUFFER_FLAG_FREED ) { |
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| 86 | roar_panic(ROAR_FATAL_ERROR_MEMORY_USED_AFTER_FREE, NULL); |
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| 87 | roar_err_set(ROAR_ERROR_FAULT); |
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| 88 | return -1; |
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| 89 | } else { |
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| 90 | roar_panic(ROAR_FATAL_ERROR_MEMORY_CORRUPTION, NULL); |
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| 91 | roar_err_set(ROAR_ERROR_BADCKSUM); |
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| 92 | return -1; |
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| 93 | } |
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| 94 | |
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| 95 | if ( buf->refc == 0 ) { |
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| 96 | roar_panic(ROAR_FATAL_ERROR_MEMORY_CORRUPTION, NULL); |
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[5299] | 97 | roar_err_set(ROAR_ERROR_FAULT); |
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| 98 | return -1; |
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[5011] | 99 | } |
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| 100 | |
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| 101 | return 0; |
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| 102 | } |
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[4905] | 103 | |
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[3764] | 104 | int roar_buffer_new_data (struct roar_buffer ** buf, size_t len, void ** data) { |
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| 105 | void * bufdata; |
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[4905] | 106 | int err; |
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[3764] | 107 | |
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| 108 | if ((bufdata = roar_mm_malloc(len)) == NULL) { |
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[1215] | 109 | return -1; |
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| 110 | } |
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| 111 | |
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[3764] | 112 | if ( roar_buffer_new_no_ma(buf, len, bufdata) == -1 ) { |
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[5901] | 113 | roar_mm_free_noerror(bufdata); |
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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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[5733] | 163 | int roar_buffer_new_str (struct roar_buffer ** buf, const char * str, int terminate) { |
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| 164 | size_t len; |
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| 165 | void * data; |
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| 166 | |
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| 167 | if ( buf == NULL || str == NULL ) { |
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| 168 | roar_err_set(ROAR_ERROR_FAULT); |
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| 169 | return -1; |
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| 170 | } |
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| 171 | |
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| 172 | len = roar_mm_strlen(str); |
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| 173 | if ( terminate ) |
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| 174 | len++; |
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| 175 | |
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| 176 | if ( roar_buffer_new_data(buf, len, &data) == -1 ) |
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| 177 | return -1; |
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| 178 | |
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| 179 | if ( len ) |
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| 180 | memcpy(data, str, len); |
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| 181 | return 0; |
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| 182 | } |
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| 183 | |
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[4522] | 184 | int roar_buffer_ref (struct roar_buffer * buf) { |
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[4905] | 185 | _ckbuf(0) |
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[4522] | 186 | |
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| 187 | buf->refc++; |
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| 188 | |
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| 189 | return 0; |
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| 190 | } |
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| 191 | |
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| 192 | int roar_buffer_unref (struct roar_buffer * buf) { |
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[5011] | 193 | struct roar_buffer * next, * cur; |
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| 194 | int flags; |
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| 195 | |
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| 196 | ROAR_DBG("roar_buffer_unref(buf=%p) = ?", buf); |
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| 197 | |
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| 198 | _ckbuf_free(0) |
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| 199 | |
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| 200 | ROAR_DBG("roar_buffer_unref(buf=%p) = ?", buf); |
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[0] | 201 | |
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[5348] | 202 | cur = buf; |
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[5011] | 203 | while (cur != NULL) { |
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| 204 | flags = cur->flags & (ROAR_BUFFER_FLAG_USEABLE|ROAR_BUFFER_FLAG_FREED); |
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| 205 | if ( flags == ROAR_BUFFER_FLAG_FREED ) { |
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| 206 | roar_panic(ROAR_FATAL_ERROR_MEMORY_DOUBLE_FREE, NULL); |
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| 207 | } |
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| 208 | |
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[5348] | 209 | _ckmem_corruption(cur, 0); |
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[5011] | 210 | |
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[5348] | 211 | if ( cur->refc == 0 ) { |
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[5651] | 212 | ROAR_WARN("roar_buffer_unref(buf=%p): Ref counter for buffer at %p is wrong. assuming one.", cur, cur); |
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[5348] | 213 | cur->refc = 1; |
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| 214 | roar_panic(ROAR_FATAL_ERROR_MEMORY_CORRUPTION, NULL); |
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| 215 | } else if ( cur->refc > 1 ) { |
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| 216 | cur->refc--; |
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| 217 | return 0; |
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| 218 | } |
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| 219 | |
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| 220 | ROAR_DBG("roar_buffer_unref(buf=%p) = ?", buf); |
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[5011] | 221 | |
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| 222 | if ( roar_buffer_get_flag(cur, ROAR_BUFFER_FLAG_NOFREE) != 1 ) |
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| 223 | roar_mm_free(cur->data); |
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| 224 | |
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| 225 | cur->flags = ROAR_BUFFER_FLAG_FREED; |
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| 226 | next = cur->next; |
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| 227 | roar_mm_free(cur); |
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| 228 | cur = next; |
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| 229 | } |
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| 230 | |
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| 231 | ROAR_DBG("roar_buffer_unref(buf=%p) = 0", buf); |
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[0] | 232 | return 0; |
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| 233 | } |
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| 234 | |
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| 235 | int roar_buffer_delete (struct roar_buffer * buf, struct roar_buffer ** next) { |
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| 236 | if ( buf == NULL ) { |
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| 237 | if ( next != NULL ) |
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| 238 | *next = NULL; |
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[4905] | 239 | roar_err_set(ROAR_ERROR_FAULT); |
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[0] | 240 | return -1; |
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| 241 | } |
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| 242 | |
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[5348] | 243 | ROAR_DBG("roar_buffer_delete(buf=%p, next=%p) = ?", buf, next); |
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[0] | 244 | |
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[5348] | 245 | if ( next != NULL ) { |
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| 246 | *next = buf; |
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| 247 | return roar_buffer_next(next); |
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| 248 | } else { |
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| 249 | return roar_buffer_unref(buf); |
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| 250 | } |
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| 251 | } |
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| 252 | |
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| 253 | int roar_buffer_next (struct roar_buffer ** buf) { |
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| 254 | struct roar_buffer * ret; |
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[0] | 255 | |
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[5348] | 256 | if ( buf == NULL || *buf == NULL ) { |
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| 257 | roar_err_set(ROAR_ERROR_FAULT); |
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| 258 | } |
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| 259 | |
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| 260 | ret = (*buf)->next; |
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[2976] | 261 | |
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[5348] | 262 | if ( ret != NULL ) |
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| 263 | roar_buffer_ref(ret); |
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[0] | 264 | |
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[5348] | 265 | roar_buffer_unref(*buf); |
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| 266 | |
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| 267 | *buf = ret; |
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| 268 | |
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[0] | 269 | return 0; |
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| 270 | } |
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| 271 | |
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| 272 | int roar_buffer_add (struct roar_buffer * buf, struct roar_buffer * next) { |
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[5348] | 273 | if ( roar_buffer_ref(next) == -1 ) |
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| 274 | return -1; |
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[5299] | 275 | return roar_buffer_moveinto(buf, &next); |
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[5298] | 276 | } |
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| 277 | |
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[5299] | 278 | int roar_buffer_moveinto (struct roar_buffer * buf, struct roar_buffer ** next) { |
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[1953] | 279 | unsigned int deep = 0; |
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| 280 | |
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[5299] | 281 | _ckbuf(next == NULL || _ckmem_corruption(*next, 0)) |
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[0] | 282 | |
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| 283 | ROAR_DBG("buffer_add(buf=%p, next=%p) = ?", buf, next); |
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[5299] | 284 | ROAR_DBG("buffer_add(buf=%p, next=%p): *next=%p", buf, next, *next); |
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[0] | 285 | |
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[4905] | 286 | if ( buf->flags & ROAR_BUFFER_FLAG_RING ) { |
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| 287 | roar_err_set(ROAR_ERROR_INVAL); |
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[3020] | 288 | return -1; |
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[4905] | 289 | } |
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[3020] | 290 | |
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[5299] | 291 | if ( buf == *next ) { |
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[1953] | 292 | ROAR_ERR("buffer_add(*): both pointer are of the same destination, This is a error in the application"); |
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[4905] | 293 | roar_err_set(ROAR_ERROR_INVAL); |
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[1953] | 294 | return -1; |
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| 295 | } |
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| 296 | |
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[0] | 297 | while ( buf->next != NULL ) { |
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[302] | 298 | ROAR_DBG("buffer_add(*): buf=%p, next=%p (len=%i)", buf, buf->next, buf->user_len); |
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[0] | 299 | // ROAR_DBG("buffer_add(): buf=%p, buf->next=%p", buf, buf->next); |
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| 300 | buf = buf->next; |
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[1953] | 301 | deep++; |
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| 302 | |
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[5299] | 303 | if ( buf == *next ) { |
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[1953] | 304 | 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] | 305 | // why don't we return here? |
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[1953] | 306 | } |
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[0] | 307 | } |
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| 308 | |
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[5299] | 309 | buf->next = *next; |
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[0] | 310 | |
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[1953] | 311 | ROAR_DBG("buffer_add(*): adding buffer at deep %u", deep); |
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| 312 | |
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[5299] | 313 | *next = NULL; |
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| 314 | |
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[0] | 315 | return 0; |
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| 316 | } |
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| 317 | |
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[5603] | 318 | int roar_buffer_moveintoqueue(struct roar_buffer ** buf, struct roar_buffer ** next) { |
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| 319 | if ( buf == NULL || next == NULL ) { |
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| 320 | roar_err_set(ROAR_ERROR_FAULT); |
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| 321 | return -1; |
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| 322 | } |
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| 323 | |
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| 324 | if ( *buf == NULL ) { |
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| 325 | *buf = *next; |
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| 326 | *next = NULL; |
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| 327 | return 0; |
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| 328 | } else { |
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| 329 | return roar_buffer_moveinto(*buf, next); |
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| 330 | } |
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| 331 | } |
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| 332 | |
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[0] | 333 | int roar_buffer_get_next (struct roar_buffer * buf, struct roar_buffer ** next) { |
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[4905] | 334 | _ckbuf(0) |
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[0] | 335 | |
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| 336 | *next = buf->next; |
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| 337 | |
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[5348] | 338 | return roar_buffer_ref(*next); |
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[0] | 339 | } |
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| 340 | |
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[3020] | 341 | int roar_buffer_ring_new (struct roar_buffer ** buf, size_t len, int free_running) { |
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| 342 | struct roar_buffer * n; |
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| 343 | |
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[5011] | 344 | _ckbuf_free(0) |
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[4905] | 345 | |
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| 346 | if ( len == 0 ) { |
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| 347 | roar_err_set(ROAR_ERROR_RANGE); |
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[3020] | 348 | return -1; |
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[4905] | 349 | } |
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[3020] | 350 | |
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| 351 | // just to be sure: |
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| 352 | *buf = NULL; |
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| 353 | |
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| 354 | if ( roar_buffer_new(&n, len) == -1 ) |
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| 355 | return -1; |
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| 356 | |
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| 357 | n->flags |= ROAR_BUFFER_FLAG_RING; |
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| 358 | |
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| 359 | if ( free_running ) |
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| 360 | n->flags |= ROAR_BUFFER_FLAG_FREE_RUNNING; |
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| 361 | |
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| 362 | n->meta.ring.read_pos = 0; |
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| 363 | n->meta.ring.write_pos = 0; |
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| 364 | |
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| 365 | memset(n->data, 0, n->len); |
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| 366 | |
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| 367 | *buf = n; |
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| 368 | |
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| 369 | return 0; |
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| 370 | } |
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| 371 | |
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[0] | 372 | int roar_buffer_get_data (struct roar_buffer * buf, void ** data) { |
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[5352] | 373 | _ckbuf(data == NULL) |
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| 374 | |
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| 375 | *data = buf->user_data; |
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| 376 | |
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| 377 | return 0; |
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| 378 | } |
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| 379 | |
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| 380 | int roar_buffer_get_datalen(struct roar_buffer * buf, void ** data, size_t * len) { |
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[4905] | 381 | _ckbuf(0) |
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[0] | 382 | |
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[5352] | 383 | if ( data != NULL ) |
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| 384 | *data = buf->user_data; |
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| 385 | if ( len != NULL ) |
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| 386 | *len = buf->user_len; |
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[0] | 387 | |
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| 388 | return 0; |
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| 389 | } |
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| 390 | |
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| 391 | int roar_buffer_set_offset (struct roar_buffer * buf, size_t off) { |
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[4905] | 392 | _ckbuf(0) |
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| 393 | |
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| 394 | if ( off > buf->user_len ) { |
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| 395 | roar_err_set(ROAR_ERROR_RANGE); |
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[0] | 396 | return -1; |
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[4905] | 397 | } |
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[0] | 398 | |
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| 399 | buf->user_len -= off; |
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| 400 | buf->user_data += off; |
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| 401 | |
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| 402 | return 0; |
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| 403 | } |
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| 404 | |
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[904] | 405 | int roar_buffer_shift_out (struct roar_buffer ** buf, void * data, size_t * len) { |
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| 406 | size_t todo, cl; |
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| 407 | struct roar_buffer * cur; |
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| 408 | void * cd; |
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| 409 | |
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[5011] | 410 | _ckbuf_free(len == NULL || data == NULL); |
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[904] | 411 | |
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[996] | 412 | if ( *buf == NULL ) { |
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| 413 | 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] | 414 | roar_err_set(ROAR_ERROR_FAULT); |
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[904] | 415 | return -1; |
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[996] | 416 | } |
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[904] | 417 | |
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| 418 | todo = *len; |
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| 419 | cur = *buf; |
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| 420 | |
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| 421 | *len = 0; |
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| 422 | |
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[2066] | 423 | while (todo && cur != NULL) { |
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[904] | 424 | ROAR_DBG("roar_buffer_shift_out(*): todo=%u, cur=%p", (unsigned int) todo, cur); |
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| 425 | |
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[5131] | 426 | _ckmem_corruption(cur, 0); |
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[5013] | 427 | |
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[904] | 428 | if ( roar_buffer_get_len(cur, &cl) == -1 ) |
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| 429 | return -1; |
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| 430 | |
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| 431 | if ( cl > todo ) { |
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| 432 | if ( roar_buffer_get_data(cur, &cd) == -1 ) |
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| 433 | return -1; |
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| 434 | |
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| 435 | cl = todo; |
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| 436 | |
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| 437 | memcpy(data, cd, cl); |
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| 438 | todo -= cl; |
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| 439 | data += cl; |
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| 440 | *len += cl; |
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| 441 | |
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| 442 | if ( roar_buffer_set_offset(cur, cl) == -1 ) |
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| 443 | return -1; |
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| 444 | } else { |
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| 445 | if ( roar_buffer_get_data(cur, &cd) == -1 ) |
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| 446 | return -1; |
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| 447 | |
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| 448 | memcpy(data, cd, cl); |
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| 449 | todo -= cl; |
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| 450 | data += cl; |
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| 451 | *len += cl; |
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| 452 | |
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| 453 | if ( roar_buffer_next(&cur) == -1 ) |
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| 454 | return -1; |
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| 455 | } |
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| 456 | |
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| 457 | /* |
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| 458 | if ( cur == NULL ) |
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| 459 | break; |
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| 460 | */ |
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| 461 | } |
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| 462 | |
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| 463 | *buf = cur; |
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| 464 | |
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[996] | 465 | return 0; |
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[904] | 466 | } |
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| 467 | |
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[0] | 468 | int roar_buffer_set_meta (struct roar_buffer * buf, void * meta) { |
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[4905] | 469 | _ckbuf(0) |
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[0] | 470 | |
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[2333] | 471 | buf->meta.vp = meta; |
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[0] | 472 | |
---|
| 473 | return 0; |
---|
| 474 | } |
---|
| 475 | |
---|
| 476 | int roar_buffer_get_meta (struct roar_buffer * buf, void ** meta) { |
---|
[4905] | 477 | _ckbuf(meta == NULL) |
---|
[2333] | 478 | |
---|
| 479 | *meta = buf->meta.vp; |
---|
| 480 | |
---|
| 481 | return 0; |
---|
| 482 | } |
---|
| 483 | |
---|
| 484 | int roar_buffer_set_meta_i32(struct roar_buffer * buf, int32_t meta) { |
---|
[4905] | 485 | _ckbuf(0) |
---|
[0] | 486 | |
---|
[2333] | 487 | buf->meta.i32 = meta; |
---|
| 488 | |
---|
| 489 | return 0; |
---|
| 490 | } |
---|
| 491 | |
---|
| 492 | int roar_buffer_get_meta_i32(struct roar_buffer * buf, int32_t * meta) { |
---|
[4905] | 493 | _ckbuf(meta == NULL) |
---|
[2333] | 494 | |
---|
| 495 | *meta = buf->meta.i32; |
---|
[0] | 496 | |
---|
| 497 | return 0; |
---|
| 498 | } |
---|
| 499 | |
---|
[4901] | 500 | int roar_buffer_set_type (struct roar_buffer * buf, int type) { |
---|
[4905] | 501 | _ckbuf(0) |
---|
[4901] | 502 | |
---|
[4903] | 503 | switch (type) { |
---|
| 504 | case ROAR_VIO_DFT_RAW: |
---|
| 505 | case ROAR_VIO_DFT_PACKET: |
---|
| 506 | case ROAR_VIO_DFT_UNFRAMED: |
---|
[4988] | 507 | case ROAR_VIO_DFT_OGG_PACKET: |
---|
| 508 | case ROAR_VIO_DFT_OGG_PAGE: |
---|
[4903] | 509 | break; |
---|
| 510 | default: |
---|
[4905] | 511 | roar_err_set(ROAR_ERROR_NOTSUP); |
---|
[4903] | 512 | return -1; |
---|
| 513 | } |
---|
| 514 | |
---|
[4901] | 515 | buf->type = type; |
---|
| 516 | |
---|
| 517 | return 0; |
---|
| 518 | } |
---|
| 519 | |
---|
| 520 | int roar_buffer_get_type (struct roar_buffer * buf, int * type) { |
---|
[4905] | 521 | _ckbuf(type == NULL) |
---|
[4901] | 522 | |
---|
| 523 | *type = buf->type; |
---|
| 524 | |
---|
| 525 | return 0; |
---|
| 526 | } |
---|
| 527 | |
---|
[0] | 528 | int roar_buffer_set_len (struct roar_buffer * buf, size_t len) { |
---|
[2334] | 529 | size_t totlen; |
---|
| 530 | void * newbuf; |
---|
[5647] | 531 | size_t true_len; |
---|
| 532 | |
---|
| 533 | ROAR_DBG("roar_buffer_set_len(buf=%p, len=%lu) = ?", buf, (long unsigned int)len); |
---|
[2334] | 534 | |
---|
[4905] | 535 | _ckbuf(0) |
---|
[0] | 536 | |
---|
[5647] | 537 | ROAR_DBG("roar_buffer_set_len(buf=%p, len=%lu) = ?", buf, (long unsigned int)len); |
---|
| 538 | |
---|
[5637] | 539 | // handle special case where user length is zero: |
---|
[3032] | 540 | if ( len && !buf->user_len ) { |
---|
| 541 | buf->user_data = buf->data; |
---|
| 542 | buf->user_len = buf->len; |
---|
| 543 | } |
---|
| 544 | |
---|
[5647] | 545 | ROAR_DBG("roar_buffer_set_len(buf=%p, len=%lu) = ?", buf, (long unsigned int)len); |
---|
| 546 | |
---|
| 547 | // calculate the true length of our buffer starting at buf->user_data. |
---|
| 548 | true_len = buf->len - (buf->user_data - buf->data); |
---|
| 549 | |
---|
| 550 | if ( len > true_len ) { |
---|
| 551 | ROAR_DBG("roar_buffer_set_len(buf=%p, len=%lu): We need to enlarge the buffer.", buf, (long unsigned int)len); |
---|
| 552 | |
---|
[3021] | 553 | // we can only enlage a buffer if it's one of our own memory segments |
---|
[4905] | 554 | if ( buf->flags & ROAR_BUFFER_FLAG_NOFREE ) { |
---|
[5647] | 555 | ROAR_DBG("roar_buffer_set_len(buf=%p, len=%lu) = -1 //error=NOTSUP", buf, (long unsigned int)len); |
---|
[4905] | 556 | roar_err_set(ROAR_ERROR_NOTSUP); |
---|
[3021] | 557 | return -1; |
---|
[4905] | 558 | } |
---|
[3021] | 559 | |
---|
[4989] | 560 | totlen = (buf->len - buf->user_len) + len; |
---|
[3021] | 561 | newbuf = roar_mm_realloc(buf->data, totlen); |
---|
[2334] | 562 | if ( newbuf == NULL ) |
---|
| 563 | return -1; |
---|
| 564 | |
---|
[4988] | 565 | buf->user_data = newbuf + (buf->user_data - buf->data); |
---|
[4989] | 566 | buf->user_len = len; |
---|
[2334] | 567 | buf->data = newbuf; |
---|
[4989] | 568 | buf->len = totlen; |
---|
[2334] | 569 | } else { |
---|
[5647] | 570 | ROAR_DBG("roar_buffer_set_len(buf=%p, len=%lu): No need to enlarge the buffer.", buf, (long unsigned int)len); |
---|
[2334] | 571 | buf->user_len = len; |
---|
| 572 | } |
---|
[0] | 573 | |
---|
[5647] | 574 | ROAR_DBG("roar_buffer_set_len(buf=%p, len=%lu) = 0", buf, (long unsigned int)len); |
---|
[0] | 575 | return 0; |
---|
| 576 | } |
---|
| 577 | |
---|
| 578 | int roar_buffer_get_len (struct roar_buffer * buf, size_t * len) { |
---|
[4905] | 579 | _ckbuf(0) |
---|
[0] | 580 | |
---|
| 581 | *len = buf->user_len; |
---|
| 582 | |
---|
| 583 | return 0; |
---|
| 584 | } |
---|
| 585 | |
---|
[1215] | 586 | int roar_buffer_set_flag (struct roar_buffer * buf, int flag, int reset) { |
---|
[4905] | 587 | _ckbuf(0) |
---|
[1215] | 588 | |
---|
| 589 | buf->flags |= flag; |
---|
| 590 | |
---|
| 591 | if ( reset ) |
---|
| 592 | buf->flags -= flag; |
---|
| 593 | |
---|
| 594 | return 0; |
---|
| 595 | } |
---|
| 596 | |
---|
| 597 | int roar_buffer_get_flag (struct roar_buffer * buf, int flag) { |
---|
[4905] | 598 | _ckbuf(0) |
---|
[1215] | 599 | |
---|
| 600 | return buf->flags & flag; |
---|
| 601 | } |
---|
| 602 | |
---|
[46] | 603 | int roar_buffer_duplicate (struct roar_buffer * buf, struct roar_buffer ** copy) { |
---|
| 604 | struct roar_buffer * cur = buf; |
---|
| 605 | struct roar_buffer * new; |
---|
[48] | 606 | void * od, * nd; |
---|
[4905] | 607 | int err; |
---|
| 608 | |
---|
| 609 | _ckbuf(copy == NULL) |
---|
[46] | 610 | |
---|
| 611 | *copy = NULL; |
---|
| 612 | |
---|
[5111] | 613 | // TODO: This function does not handle ring buffers. |
---|
| 614 | // FIXME: This function does not error out in case of wrong buffer type in buf. |
---|
| 615 | // TODO: This function does not handle buffer meta data. |
---|
| 616 | |
---|
[4905] | 617 | while (cur != NULL) { |
---|
[46] | 618 | if ( roar_buffer_new(&new, cur->user_len) == -1 ) { |
---|
[4905] | 619 | err = roar_error; |
---|
[46] | 620 | roar_buffer_free(*copy); |
---|
[4905] | 621 | roar_err_set(err); |
---|
[46] | 622 | return -1; |
---|
| 623 | } |
---|
| 624 | |
---|
| 625 | if ( *copy == NULL ) |
---|
| 626 | *copy = new; |
---|
| 627 | |
---|
[5111] | 628 | _LIBROAR_IGNORE_RET(roar_buffer_get_data(cur, &od)); |
---|
| 629 | _LIBROAR_IGNORE_RET(roar_buffer_get_data(new, &nd)); |
---|
[48] | 630 | memcpy(nd, od, cur->user_len); |
---|
| 631 | |
---|
[5720] | 632 | if ( *copy != new ) { |
---|
| 633 | _LIBROAR_IGNORE_RET(roar_buffer_moveinto(*copy, &new)); |
---|
| 634 | } |
---|
[46] | 635 | |
---|
| 636 | cur = cur->next; |
---|
| 637 | } |
---|
[4905] | 638 | |
---|
[46] | 639 | return 0; |
---|
| 640 | } |
---|
| 641 | |
---|
[7] | 642 | int roar_buffer_ring_stats (struct roar_buffer * buf, struct roar_buffer_stats * stats) { |
---|
[5131] | 643 | ROAR_DBG("roar_buffer_ring_stats(buf=%p, stats=%p) = ?", buf, stats); |
---|
| 644 | |
---|
[4905] | 645 | _ckbuf(0) |
---|
[7] | 646 | |
---|
[5131] | 647 | ROAR_DBG("roar_buffer_ring_stats(buf=%p, stats=%p) = ?", buf, stats); |
---|
| 648 | |
---|
[7] | 649 | stats->parts = 0; |
---|
| 650 | stats->bytes = 0; |
---|
| 651 | stats->memory_usage = 0; |
---|
| 652 | |
---|
[4905] | 653 | while (buf != NULL ) { |
---|
[7] | 654 | stats->parts++; |
---|
| 655 | stats->bytes += buf->user_len; |
---|
| 656 | stats->memory_usage += buf->len + sizeof(struct roar_buffer); |
---|
| 657 | buf = buf->next; |
---|
| 658 | } |
---|
| 659 | |
---|
| 660 | return 0; |
---|
| 661 | } |
---|
| 662 | |
---|
[3020] | 663 | int roar_buffer_ring_read (struct roar_buffer * buf, void * data, size_t * len) { |
---|
[4615] | 664 | struct roar_buffer_ring * ring; |
---|
| 665 | size_t havelen; |
---|
| 666 | size_t done; |
---|
| 667 | size_t tmp; |
---|
| 668 | |
---|
[4905] | 669 | _ckbuf(len == NULL) |
---|
| 670 | |
---|
[3020] | 671 | if ( buf == NULL || len == NULL ) |
---|
| 672 | return -1; |
---|
| 673 | |
---|
[4905] | 674 | if ( data == NULL && *len != 0 ) { |
---|
| 675 | roar_err_set(ROAR_ERROR_FAULT); |
---|
[3020] | 676 | return -1; |
---|
[4905] | 677 | } |
---|
[3020] | 678 | |
---|
[4905] | 679 | if ( !(buf->flags & ROAR_BUFFER_FLAG_RING) ) { |
---|
| 680 | roar_err_set(ROAR_ERROR_TYPEMM); |
---|
[3020] | 681 | return -1; |
---|
[4905] | 682 | } |
---|
[3020] | 683 | |
---|
| 684 | if ( *len == 0 ) |
---|
| 685 | return 0; |
---|
| 686 | |
---|
| 687 | // we may handle this later: |
---|
[4905] | 688 | if ( *len > buf->user_len ) { |
---|
| 689 | roar_err_set(ROAR_ERROR_NOTSUP); |
---|
[3020] | 690 | return -1; |
---|
[4905] | 691 | } |
---|
[3020] | 692 | |
---|
[4615] | 693 | if ( (buf->flags & ROAR_BUFFER_FLAG_FREE_RUNNING) ) { |
---|
| 694 | if ( buf->meta.ring.read_pos >= buf->user_len ) |
---|
| 695 | buf->meta.ring.read_pos -= buf->user_len; |
---|
[3020] | 696 | |
---|
[4615] | 697 | if ( (*len + buf->meta.ring.read_pos) > buf->user_len ) { |
---|
| 698 | // wraped mode: |
---|
| 699 | memcpy(data, buf->user_data+buf->meta.ring.read_pos, buf->user_len - buf->meta.ring.read_pos); |
---|
| 700 | memcpy(data, buf->user_data, *len + buf->meta.ring.read_pos - buf->user_len); |
---|
| 701 | |
---|
| 702 | buf->meta.ring.read_pos += *len; |
---|
| 703 | buf->meta.ring.read_pos -= buf->user_len; |
---|
| 704 | return 0; |
---|
| 705 | } else { |
---|
| 706 | // unwarped mode: |
---|
| 707 | memcpy(data, buf->user_data+buf->meta.ring.read_pos, *len); |
---|
| 708 | buf->meta.ring.read_pos += *len; |
---|
| 709 | return 0; |
---|
| 710 | } |
---|
| 711 | } else { |
---|
| 712 | ring = &(buf->meta.ring); |
---|
| 713 | |
---|
| 714 | if ( ring->read_pos == ring->write_pos ) { |
---|
| 715 | *len = 0; |
---|
| 716 | return 0; |
---|
| 717 | } else if ( ring->read_pos < ring->write_pos ) { |
---|
| 718 | havelen = ring->write_pos - ring->read_pos; |
---|
| 719 | |
---|
| 720 | if ( havelen > *len ) |
---|
| 721 | havelen = *len; |
---|
| 722 | |
---|
| 723 | memcpy(data, buf->user_data+ring->read_pos, havelen); |
---|
| 724 | ring->read_pos += havelen; |
---|
[3020] | 725 | |
---|
[4615] | 726 | *len = havelen; |
---|
| 727 | return 0; |
---|
| 728 | } else { // write_pos < read_pos |
---|
| 729 | done = 0; |
---|
| 730 | |
---|
| 731 | // first pass: use data up to end of buffer |
---|
| 732 | |
---|
| 733 | havelen = buf->user_len - ring->read_pos; |
---|
| 734 | |
---|
| 735 | if ( havelen > *len ) |
---|
| 736 | havelen = *len; |
---|
| 737 | |
---|
| 738 | memcpy(data, buf->user_data+ring->read_pos, havelen); |
---|
| 739 | ring->read_pos += havelen; |
---|
| 740 | |
---|
| 741 | done += havelen; |
---|
| 742 | |
---|
| 743 | if ( ring->read_pos == buf->user_len ) { |
---|
| 744 | ring->read_pos = 0; |
---|
| 745 | } |
---|
| 746 | |
---|
| 747 | // second pass: use data from strat of buffer to write pointer |
---|
| 748 | |
---|
| 749 | if ( *len > done ) { |
---|
| 750 | tmp = *len - done; |
---|
| 751 | if ( roar_buffer_ring_read(buf, data+done, &tmp) == 0 ) { |
---|
| 752 | done += tmp; |
---|
| 753 | } |
---|
| 754 | } |
---|
| 755 | |
---|
| 756 | *len = done; |
---|
| 757 | return 0; |
---|
| 758 | } |
---|
[3020] | 759 | } |
---|
| 760 | |
---|
[4905] | 761 | roar_err_set(ROAR_ERROR_UNKNOWN); |
---|
[3020] | 762 | return -1; |
---|
| 763 | } |
---|
| 764 | |
---|
| 765 | int roar_buffer_ring_write (struct roar_buffer * buf, void * data, size_t * len) { |
---|
[4624] | 766 | struct roar_buffer_ring * ring; |
---|
| 767 | size_t havelen; |
---|
| 768 | size_t done; |
---|
| 769 | size_t tmp; |
---|
| 770 | |
---|
[4625] | 771 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = ?", buf, data, len); |
---|
| 772 | |
---|
[4905] | 773 | _ckbuf(len == NULL) |
---|
[3020] | 774 | |
---|
[4905] | 775 | if ( data == NULL && *len != 0 ) { |
---|
| 776 | roar_err_set(ROAR_ERROR_FAULT); |
---|
[3020] | 777 | return -1; |
---|
[4905] | 778 | } |
---|
[3020] | 779 | |
---|
[4905] | 780 | if ( !(buf->flags & ROAR_BUFFER_FLAG_RING) ) { |
---|
| 781 | roar_err_set(ROAR_ERROR_TYPEMM); |
---|
[3020] | 782 | return -1; |
---|
[4905] | 783 | } |
---|
[3020] | 784 | |
---|
| 785 | if ( *len == 0 ) |
---|
| 786 | return 0; |
---|
| 787 | |
---|
| 788 | // we may handle this later: |
---|
[4905] | 789 | if ( *len > buf->user_len ) { |
---|
| 790 | roar_err_set(ROAR_ERROR_NOTSUP); |
---|
[3020] | 791 | return -1; |
---|
[4905] | 792 | } |
---|
[3020] | 793 | |
---|
[4615] | 794 | if ( (buf->flags & ROAR_BUFFER_FLAG_FREE_RUNNING) ) { |
---|
| 795 | if ( buf->meta.ring.write_pos >= buf->user_len ) |
---|
| 796 | buf->meta.ring.write_pos -= buf->user_len; |
---|
[3020] | 797 | |
---|
[4615] | 798 | if ( (*len + buf->meta.ring.write_pos) > buf->user_len ) { |
---|
| 799 | // wraped mode: |
---|
| 800 | memcpy(buf->user_data+buf->meta.ring.write_pos, data, buf->user_len - buf->meta.ring.write_pos); |
---|
| 801 | memcpy(buf->user_data, data, *len + buf->meta.ring.write_pos - buf->user_len); |
---|
[3020] | 802 | |
---|
[4615] | 803 | buf->meta.ring.write_pos += *len; |
---|
| 804 | buf->meta.ring.write_pos -= buf->user_len; |
---|
| 805 | return 0; |
---|
| 806 | } else { |
---|
| 807 | // unwarped mode: |
---|
| 808 | memcpy(buf->user_data+buf->meta.ring.write_pos, data, *len); |
---|
| 809 | buf->meta.ring.write_pos += *len; |
---|
| 810 | return 0; |
---|
| 811 | } |
---|
[3020] | 812 | } else { |
---|
[4624] | 813 | ring = &(buf->meta.ring); |
---|
| 814 | done = 0; |
---|
| 815 | |
---|
| 816 | 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); |
---|
| 817 | |
---|
| 818 | if ( ring->write_pos >= ring->read_pos ) { |
---|
[4625] | 819 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = ?", buf, data, len); |
---|
| 820 | |
---|
[4624] | 821 | havelen = buf->user_len - ring->write_pos; |
---|
| 822 | |
---|
| 823 | if ( ring->read_pos == 0 ) |
---|
| 824 | havelen--; |
---|
| 825 | |
---|
| 826 | if ( havelen > *len ) |
---|
| 827 | havelen = *len; |
---|
| 828 | |
---|
| 829 | memcpy(buf->user_data+ring->write_pos, data, havelen); |
---|
| 830 | |
---|
| 831 | done += havelen; |
---|
| 832 | ring->write_pos += havelen; |
---|
| 833 | |
---|
| 834 | if ( ring->write_pos == buf->user_len ) |
---|
| 835 | ring->write_pos = 0; |
---|
| 836 | |
---|
| 837 | if ( *len > done && ring->read_pos != 0 ) { |
---|
| 838 | tmp = *len - done; |
---|
| 839 | if ( roar_buffer_ring_write(buf, data+done, &tmp) == 0 ) { |
---|
| 840 | done += tmp; |
---|
| 841 | } |
---|
| 842 | } |
---|
| 843 | |
---|
| 844 | *len = done; |
---|
[4625] | 845 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = 0", buf, data, len); |
---|
[4624] | 846 | return 0; |
---|
| 847 | } else { |
---|
[4625] | 848 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = ?", buf, data, len); |
---|
| 849 | |
---|
[4624] | 850 | // test for buffer-is-full: |
---|
| 851 | if ( (ring->write_pos + 1) == ring->read_pos ) { |
---|
| 852 | *len = 0; |
---|
[4625] | 853 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = 0", buf, data, len); |
---|
[4624] | 854 | return 0; |
---|
| 855 | } |
---|
| 856 | |
---|
[4625] | 857 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = ?", buf, data, len); |
---|
| 858 | |
---|
[4624] | 859 | havelen = ring->read_pos - ring->write_pos - 1; |
---|
| 860 | |
---|
| 861 | if ( havelen > *len ) |
---|
| 862 | havelen = *len; |
---|
| 863 | |
---|
| 864 | memcpy(buf->user_data+ring->write_pos, data, havelen); |
---|
| 865 | |
---|
[4625] | 866 | ring->write_pos += havelen; |
---|
[4624] | 867 | *len = havelen; |
---|
[4625] | 868 | |
---|
| 869 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = 0", buf, data, len); |
---|
[4624] | 870 | return 0; |
---|
| 871 | } |
---|
[3020] | 872 | } |
---|
| 873 | |
---|
[4905] | 874 | roar_err_set(ROAR_ERROR_UNKNOWN); |
---|
[3020] | 875 | return -1; |
---|
| 876 | } |
---|
| 877 | |
---|
[4625] | 878 | int roar_buffer_ring_avail(struct roar_buffer * buf, size_t * readlen, size_t * writelen) { |
---|
| 879 | struct roar_buffer_ring * ring; |
---|
| 880 | size_t have; |
---|
| 881 | |
---|
[4905] | 882 | _ckbuf(0) |
---|
[4625] | 883 | |
---|
[4905] | 884 | if ( !(buf->flags & ROAR_BUFFER_FLAG_RING) ) { |
---|
| 885 | roar_err_set(ROAR_ERROR_TYPEMM); |
---|
[4625] | 886 | return -1; |
---|
[4905] | 887 | } |
---|
[4625] | 888 | |
---|
| 889 | ring = &(buf->meta.ring); |
---|
| 890 | |
---|
| 891 | ROAR_DBG("roar_buffer_ring_avail(buf=%p, readlen=%p, writelen=%p) = ?", buf, readlen, writelen); |
---|
| 892 | |
---|
| 893 | if ( readlen != NULL ) { |
---|
| 894 | have = 0; |
---|
| 895 | |
---|
| 896 | if ( ring->write_pos >= ring->read_pos ) { |
---|
| 897 | have = ring->write_pos - ring->read_pos; |
---|
| 898 | } else { |
---|
| 899 | have = buf->user_len - ring->read_pos; |
---|
| 900 | have += ring->write_pos; |
---|
| 901 | have -= 1; |
---|
| 902 | } |
---|
| 903 | |
---|
| 904 | *readlen = have; |
---|
| 905 | ROAR_DBG("roar_buffer_ring_avail(buf=%p, readlen=%p, writelen=%p): readlen=%llu", buf, readlen, writelen, (unsigned long long int)have); |
---|
| 906 | } |
---|
| 907 | |
---|
| 908 | if ( writelen != NULL ) { |
---|
| 909 | have = 0; |
---|
| 910 | |
---|
| 911 | if ( ring->read_pos > ring->write_pos ) { |
---|
| 912 | have = ring->read_pos - ring->write_pos - 1; |
---|
| 913 | } else { |
---|
| 914 | have = buf->user_len - ring->write_pos; |
---|
| 915 | have += ring->read_pos; |
---|
| 916 | have -= 1; |
---|
| 917 | } |
---|
| 918 | |
---|
| 919 | *writelen = have; |
---|
| 920 | ROAR_DBG("roar_buffer_ring_avail(buf=%p, readlen=%p, writelen=%p): readlen=%llu", buf, readlen, writelen, (unsigned long long int)have); |
---|
| 921 | } |
---|
| 922 | |
---|
| 923 | ROAR_DBG("roar_buffer_ring_avail(buf=%p, readlen=%p, writelen=%p) = 0", buf, readlen, writelen); |
---|
| 924 | |
---|
| 925 | return 0; |
---|
| 926 | } |
---|
| 927 | |
---|
[4629] | 928 | int roar_buffer_ring_reset(struct roar_buffer * buf) { |
---|
[4905] | 929 | _ckbuf(0) |
---|
[4629] | 930 | |
---|
[4905] | 931 | if ( !(buf->flags & ROAR_BUFFER_FLAG_RING) ) { |
---|
| 932 | roar_err_set(ROAR_ERROR_TYPEMM); |
---|
[4629] | 933 | return -1; |
---|
[4905] | 934 | } |
---|
[4629] | 935 | |
---|
| 936 | buf->meta.ring.read_pos = buf->meta.ring.write_pos = 0; |
---|
| 937 | |
---|
| 938 | return 0; |
---|
| 939 | } |
---|
| 940 | |
---|
[0] | 941 | //ll |
---|