[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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[4905] | 59 | #define _ckbuf(m) if ( buf == NULL || (m) ) { roar_err_set(ROAR_ERROR_FAULT); return -1; } |
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| 60 | |
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[3764] | 61 | int roar_buffer_new_data (struct roar_buffer ** buf, size_t len, void ** data) { |
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| 62 | void * bufdata; |
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[4905] | 63 | int err; |
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[3764] | 64 | |
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| 65 | if ((bufdata = roar_mm_malloc(len)) == NULL) { |
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[1215] | 66 | return -1; |
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| 67 | } |
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| 68 | |
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[3764] | 69 | if ( roar_buffer_new_no_ma(buf, len, bufdata) == -1 ) { |
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[4905] | 70 | err = roar_error; |
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[3764] | 71 | roar_mm_free(bufdata); |
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[4905] | 72 | roar_err_set(err); |
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[1215] | 73 | return -1; |
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| 74 | } |
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| 75 | |
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| 76 | if ( roar_buffer_set_flag(*buf, ROAR_BUFFER_FLAG_NOFREE, ROAR_BUFFER_RESET) == -1 ) { |
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[4905] | 77 | err = roar_error; |
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[1215] | 78 | roar_buffer_free(*buf); |
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[3764] | 79 | roar_mm_free(bufdata); |
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[4905] | 80 | roar_err_set(err); |
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[1215] | 81 | return -1; |
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| 82 | } |
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| 83 | |
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[3764] | 84 | if ( data != NULL ) |
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| 85 | *data = bufdata; |
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| 86 | |
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[1215] | 87 | return 0; |
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| 88 | } |
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| 89 | |
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| 90 | int roar_buffer_new_no_ma(struct roar_buffer ** buf, size_t len, void * data) { // no internal malloc |
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[0] | 91 | struct roar_buffer * new; |
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| 92 | |
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| 93 | ROAR_DBG("buffer_new(buf=%p, len=%i) = ?", buf, len); |
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| 94 | |
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[4905] | 95 | _ckbuf(data == NULL) |
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[1215] | 96 | |
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[2976] | 97 | if ((new = roar_mm_malloc(sizeof(struct roar_buffer))) == NULL) { |
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[0] | 98 | *buf = NULL; |
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| 99 | return -1; |
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| 100 | } |
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| 101 | |
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[4901] | 102 | new->refc = 1; |
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[4522] | 103 | |
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[1215] | 104 | new->data = data; |
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| 105 | |
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| 106 | new->flags = ROAR_BUFFER_FLAG_NONE|ROAR_BUFFER_FLAG_NOFREE; |
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[4901] | 107 | new->type = -1; |
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[0] | 108 | |
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| 109 | new->user_data = new->data; |
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| 110 | |
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| 111 | new->next = NULL; |
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| 112 | |
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| 113 | new->len = len; |
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| 114 | new->user_len = len; |
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| 115 | *buf = new; |
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| 116 | |
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| 117 | ROAR_DBG("buffer_new(buf=%p, len=%i): New buffer at %p", buf, len, new); |
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| 118 | |
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| 119 | return 0; |
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| 120 | } |
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| 121 | |
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[4522] | 122 | int roar_buffer_ref (struct roar_buffer * buf) { |
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[4905] | 123 | _ckbuf(0) |
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[4522] | 124 | |
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| 125 | buf->refc++; |
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| 126 | |
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| 127 | return 0; |
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| 128 | } |
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| 129 | |
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| 130 | int roar_buffer_unref (struct roar_buffer * buf) { |
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[0] | 131 | struct roar_buffer * next; |
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| 132 | |
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[4905] | 133 | _ckbuf(0) |
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[0] | 134 | |
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[4522] | 135 | if ( buf->refc == 0 ) { |
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| 136 | ROAR_WARN("roar_buffer_unref(buf=%p): Ref counter is wrong. assuming one."); |
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| 137 | buf->refc = 1; |
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| 138 | } |
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| 139 | |
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| 140 | buf->refc--; |
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| 141 | |
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| 142 | if ( buf->refc ) |
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| 143 | return 0; |
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| 144 | |
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[0] | 145 | while ((next = buf->next)) { |
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[2976] | 146 | if ( roar_buffer_get_flag(buf, ROAR_BUFFER_FLAG_NOFREE) != 1 ) |
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| 147 | roar_mm_free(buf->data); |
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| 148 | |
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| 149 | roar_mm_free(buf); |
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[0] | 150 | buf = next; |
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| 151 | } |
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| 152 | |
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[1215] | 153 | if ( roar_buffer_get_flag(buf, ROAR_BUFFER_FLAG_NOFREE) != 1 ) |
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[2976] | 154 | roar_mm_free(buf->data); |
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[1215] | 155 | |
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[2976] | 156 | roar_mm_free(buf); |
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[0] | 157 | |
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| 158 | return 0; |
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| 159 | } |
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| 160 | |
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| 161 | int roar_buffer_delete (struct roar_buffer * buf, struct roar_buffer ** next) { |
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| 162 | if ( buf == NULL ) { |
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| 163 | if ( next != NULL ) |
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| 164 | *next = NULL; |
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[4905] | 165 | roar_err_set(ROAR_ERROR_FAULT); |
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[0] | 166 | return -1; |
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| 167 | } |
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| 168 | |
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| 169 | ROAR_DBG("buffer_delete(buf=%p, next=%p) = ?", buf, next); |
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| 170 | |
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| 171 | if ( next != NULL ) |
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| 172 | *next = buf->next; |
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| 173 | |
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[2976] | 174 | if ( roar_buffer_get_flag(buf, ROAR_BUFFER_FLAG_NOFREE) != 1 ) |
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| 175 | roar_mm_free(buf->data); |
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| 176 | |
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| 177 | roar_mm_free(buf); |
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[0] | 178 | |
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| 179 | ROAR_DBG("buffer_delete(buf=%p, next=%p) = 0", buf, next); |
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| 180 | return 0; |
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| 181 | } |
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| 182 | |
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| 183 | int roar_buffer_add (struct roar_buffer * buf, struct roar_buffer * next) { |
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[1953] | 184 | unsigned int deep = 0; |
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| 185 | |
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[4905] | 186 | _ckbuf(0) |
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[0] | 187 | |
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| 188 | ROAR_DBG("buffer_add(buf=%p, next=%p) = ?", buf, next); |
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| 189 | |
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[4905] | 190 | if ( buf->flags & ROAR_BUFFER_FLAG_RING ) { |
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| 191 | roar_err_set(ROAR_ERROR_INVAL); |
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[3020] | 192 | return -1; |
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[4905] | 193 | } |
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[3020] | 194 | |
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[1953] | 195 | if ( buf == next ) { |
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| 196 | ROAR_ERR("buffer_add(*): both pointer are of the same destination, This is a error in the application"); |
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[4905] | 197 | roar_err_set(ROAR_ERROR_INVAL); |
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[1953] | 198 | return -1; |
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| 199 | } |
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| 200 | |
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[0] | 201 | while ( buf->next != NULL ) { |
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[302] | 202 | ROAR_DBG("buffer_add(*): buf=%p, next=%p (len=%i)", buf, buf->next, buf->user_len); |
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[0] | 203 | // ROAR_DBG("buffer_add(): buf=%p, buf->next=%p", buf, buf->next); |
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| 204 | buf = buf->next; |
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[1953] | 205 | deep++; |
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| 206 | |
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| 207 | if ( buf == next ) { |
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| 208 | 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] | 209 | // why don't we return here? |
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[1953] | 210 | } |
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[0] | 211 | } |
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| 212 | |
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| 213 | buf->next = next; |
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| 214 | |
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[1953] | 215 | ROAR_DBG("buffer_add(*): adding buffer at deep %u", deep); |
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| 216 | |
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[0] | 217 | return 0; |
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| 218 | } |
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| 219 | |
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[4516] | 220 | int roar_buffer_clear_next (struct roar_buffer * buf) { |
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[4905] | 221 | _ckbuf(0) |
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[4516] | 222 | |
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| 223 | buf->next = NULL; |
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| 224 | |
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| 225 | return 0; |
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| 226 | } |
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| 227 | |
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[0] | 228 | int roar_buffer_get_next (struct roar_buffer * buf, struct roar_buffer ** next) { |
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[4905] | 229 | _ckbuf(0) |
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[0] | 230 | |
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| 231 | *next = buf->next; |
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| 232 | |
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| 233 | return 0; |
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| 234 | } |
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| 235 | |
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[3020] | 236 | int roar_buffer_ring_new (struct roar_buffer ** buf, size_t len, int free_running) { |
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| 237 | struct roar_buffer * n; |
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| 238 | |
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[4905] | 239 | _ckbuf(0) |
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| 240 | |
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| 241 | if ( len == 0 ) { |
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| 242 | roar_err_set(ROAR_ERROR_RANGE); |
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[3020] | 243 | return -1; |
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[4905] | 244 | } |
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[3020] | 245 | |
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| 246 | // just to be sure: |
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| 247 | *buf = NULL; |
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| 248 | |
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| 249 | if ( roar_buffer_new(&n, len) == -1 ) |
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| 250 | return -1; |
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| 251 | |
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| 252 | n->flags |= ROAR_BUFFER_FLAG_RING; |
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| 253 | |
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| 254 | if ( free_running ) |
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| 255 | n->flags |= ROAR_BUFFER_FLAG_FREE_RUNNING; |
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| 256 | |
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| 257 | n->meta.ring.read_pos = 0; |
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| 258 | n->meta.ring.write_pos = 0; |
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| 259 | |
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| 260 | memset(n->data, 0, n->len); |
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| 261 | |
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| 262 | *buf = n; |
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| 263 | |
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| 264 | return 0; |
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| 265 | } |
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| 266 | |
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[0] | 267 | int roar_buffer_get_data (struct roar_buffer * buf, void ** data) { |
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[4905] | 268 | _ckbuf(0) |
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[0] | 269 | |
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| 270 | *data = buf->user_data; |
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| 271 | |
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| 272 | return 0; |
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| 273 | } |
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| 274 | |
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| 275 | int roar_buffer_set_offset (struct roar_buffer * buf, size_t off) { |
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[4905] | 276 | _ckbuf(0) |
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| 277 | |
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| 278 | if ( off > buf->user_len ) { |
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| 279 | roar_err_set(ROAR_ERROR_RANGE); |
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[0] | 280 | return -1; |
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[4905] | 281 | } |
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[0] | 282 | |
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| 283 | buf->user_len -= off; |
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| 284 | buf->user_data += off; |
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| 285 | |
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| 286 | return 0; |
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| 287 | } |
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| 288 | |
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[904] | 289 | int roar_buffer_shift_out (struct roar_buffer ** buf, void * data, size_t * len) { |
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| 290 | size_t todo, cl; |
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| 291 | struct roar_buffer * cur; |
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| 292 | void * cd; |
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| 293 | |
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[4905] | 294 | _ckbuf(len == NULL || data == NULL); |
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[904] | 295 | |
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[996] | 296 | if ( *buf == NULL ) { |
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| 297 | 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] | 298 | roar_err_set(ROAR_ERROR_FAULT); |
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[904] | 299 | return -1; |
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[996] | 300 | } |
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[904] | 301 | |
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| 302 | todo = *len; |
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| 303 | cur = *buf; |
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| 304 | |
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| 305 | *len = 0; |
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| 306 | |
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[2066] | 307 | while (todo && cur != NULL) { |
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[904] | 308 | ROAR_DBG("roar_buffer_shift_out(*): todo=%u, cur=%p", (unsigned int) todo, cur); |
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| 309 | |
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| 310 | if ( roar_buffer_get_len(cur, &cl) == -1 ) |
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| 311 | return -1; |
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| 312 | |
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| 313 | if ( cl > todo ) { |
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| 314 | if ( roar_buffer_get_data(cur, &cd) == -1 ) |
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| 315 | return -1; |
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| 316 | |
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| 317 | cl = todo; |
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| 318 | |
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| 319 | memcpy(data, cd, cl); |
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| 320 | todo -= cl; |
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| 321 | data += cl; |
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| 322 | *len += cl; |
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| 323 | |
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| 324 | if ( roar_buffer_set_offset(cur, cl) == -1 ) |
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| 325 | return -1; |
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| 326 | } else { |
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| 327 | if ( roar_buffer_get_data(cur, &cd) == -1 ) |
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| 328 | return -1; |
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| 329 | |
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| 330 | memcpy(data, cd, cl); |
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| 331 | todo -= cl; |
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| 332 | data += cl; |
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| 333 | *len += cl; |
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| 334 | |
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| 335 | if ( roar_buffer_next(&cur) == -1 ) |
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| 336 | return -1; |
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| 337 | } |
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| 338 | |
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| 339 | /* |
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| 340 | if ( cur == NULL ) |
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| 341 | break; |
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| 342 | */ |
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| 343 | } |
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| 344 | |
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| 345 | *buf = cur; |
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| 346 | |
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[996] | 347 | return 0; |
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[904] | 348 | } |
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| 349 | |
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[0] | 350 | int roar_buffer_set_meta (struct roar_buffer * buf, void * meta) { |
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[4905] | 351 | _ckbuf(0) |
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[0] | 352 | |
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[2333] | 353 | buf->meta.vp = meta; |
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[0] | 354 | |
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| 355 | return 0; |
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| 356 | } |
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| 357 | |
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| 358 | int roar_buffer_get_meta (struct roar_buffer * buf, void ** meta) { |
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[4905] | 359 | _ckbuf(meta == NULL) |
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[2333] | 360 | |
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| 361 | *meta = buf->meta.vp; |
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| 362 | |
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| 363 | return 0; |
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| 364 | } |
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| 365 | |
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| 366 | int roar_buffer_set_meta_i32(struct roar_buffer * buf, int32_t meta) { |
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[4905] | 367 | _ckbuf(0) |
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[0] | 368 | |
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[2333] | 369 | buf->meta.i32 = meta; |
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| 370 | |
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| 371 | return 0; |
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| 372 | } |
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| 373 | |
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| 374 | int roar_buffer_get_meta_i32(struct roar_buffer * buf, int32_t * meta) { |
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[4905] | 375 | _ckbuf(meta == NULL) |
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[2333] | 376 | |
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| 377 | *meta = buf->meta.i32; |
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[0] | 378 | |
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| 379 | return 0; |
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| 380 | } |
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| 381 | |
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[4901] | 382 | int roar_buffer_set_type (struct roar_buffer * buf, int type) { |
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[4905] | 383 | _ckbuf(0) |
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[4901] | 384 | |
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[4903] | 385 | switch (type) { |
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| 386 | case ROAR_VIO_DFT_RAW: |
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| 387 | case ROAR_VIO_DFT_PACKET: |
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| 388 | case ROAR_VIO_DFT_UNFRAMED: |
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| 389 | break; |
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| 390 | default: |
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[4905] | 391 | roar_err_set(ROAR_ERROR_NOTSUP); |
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[4903] | 392 | return -1; |
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| 393 | } |
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| 394 | |
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[4901] | 395 | buf->type = type; |
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| 396 | |
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| 397 | return 0; |
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| 398 | } |
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| 399 | |
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| 400 | int roar_buffer_get_type (struct roar_buffer * buf, int * type) { |
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[4905] | 401 | _ckbuf(type == NULL) |
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[4901] | 402 | |
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| 403 | *type = buf->type; |
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| 404 | |
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| 405 | return 0; |
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| 406 | } |
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| 407 | |
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[0] | 408 | int roar_buffer_set_len (struct roar_buffer * buf, size_t len) { |
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[2334] | 409 | size_t totlen; |
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| 410 | void * newbuf; |
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| 411 | |
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[4905] | 412 | _ckbuf(0) |
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[0] | 413 | |
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[3032] | 414 | // handle specal case where user length is zero: |
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| 415 | if ( len && !buf->user_len ) { |
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| 416 | buf->user_data = buf->data; |
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| 417 | buf->user_len = buf->len; |
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| 418 | } |
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| 419 | |
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[2334] | 420 | if ( len > buf->user_len ) { |
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[3021] | 421 | // we can only enlage a buffer if it's one of our own memory segments |
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[4905] | 422 | if ( buf->flags & ROAR_BUFFER_FLAG_NOFREE ) { |
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| 423 | roar_err_set(ROAR_ERROR_NOTSUP); |
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[3021] | 424 | return -1; |
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[4905] | 425 | } |
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[3021] | 426 | |
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[2334] | 427 | totlen = buf->len - buf->user_len + len; |
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[3021] | 428 | newbuf = roar_mm_realloc(buf->data, totlen); |
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[2334] | 429 | if ( newbuf == NULL ) |
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| 430 | return -1; |
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| 431 | |
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| 432 | buf->data = newbuf; |
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| 433 | buf->user_len = len; |
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| 434 | } else { |
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| 435 | buf->user_len = len; |
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| 436 | } |
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[0] | 437 | |
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| 438 | return 0; |
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| 439 | } |
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| 440 | |
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| 441 | int roar_buffer_get_len (struct roar_buffer * buf, size_t * len) { |
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[4905] | 442 | _ckbuf(0) |
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[0] | 443 | |
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| 444 | *len = buf->user_len; |
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| 445 | |
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| 446 | return 0; |
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| 447 | } |
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| 448 | |
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[1215] | 449 | int roar_buffer_set_flag (struct roar_buffer * buf, int flag, int reset) { |
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[4905] | 450 | _ckbuf(0) |
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[1215] | 451 | |
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| 452 | buf->flags |= flag; |
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| 453 | |
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| 454 | if ( reset ) |
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| 455 | buf->flags -= flag; |
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| 456 | |
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| 457 | return 0; |
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| 458 | } |
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| 459 | |
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| 460 | int roar_buffer_get_flag (struct roar_buffer * buf, int flag) { |
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[4905] | 461 | _ckbuf(0) |
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[1215] | 462 | |
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| 463 | return buf->flags & flag; |
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| 464 | } |
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| 465 | |
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[46] | 466 | int roar_buffer_duplicate (struct roar_buffer * buf, struct roar_buffer ** copy) { |
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| 467 | struct roar_buffer * cur = buf; |
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| 468 | struct roar_buffer * new; |
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[48] | 469 | void * od, * nd; |
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[4905] | 470 | int err; |
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| 471 | |
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| 472 | _ckbuf(copy == NULL) |
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[46] | 473 | |
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| 474 | *copy = NULL; |
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| 475 | |
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[4905] | 476 | while (cur != NULL) { |
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[46] | 477 | if ( roar_buffer_new(&new, cur->user_len) == -1 ) { |
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[4905] | 478 | err = roar_error; |
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[46] | 479 | roar_buffer_free(*copy); |
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[4905] | 480 | roar_err_set(err); |
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[46] | 481 | return -1; |
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| 482 | } |
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| 483 | |
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| 484 | if ( *copy == NULL ) |
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| 485 | *copy = new; |
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| 486 | |
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[48] | 487 | roar_buffer_get_data(cur, &od); |
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| 488 | roar_buffer_get_data(new, &nd); |
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| 489 | memcpy(nd, od, cur->user_len); |
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| 490 | |
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[46] | 491 | roar_buffer_add(*copy, new); |
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| 492 | |
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| 493 | cur = cur->next; |
---|
| 494 | } |
---|
[4905] | 495 | |
---|
[46] | 496 | return 0; |
---|
| 497 | } |
---|
| 498 | |
---|
[7] | 499 | int roar_buffer_ring_stats (struct roar_buffer * buf, struct roar_buffer_stats * stats) { |
---|
[4905] | 500 | _ckbuf(0) |
---|
[7] | 501 | |
---|
| 502 | stats->parts = 0; |
---|
| 503 | stats->bytes = 0; |
---|
| 504 | stats->memory_usage = 0; |
---|
| 505 | |
---|
[4905] | 506 | while (buf != NULL ) { |
---|
[7] | 507 | stats->parts++; |
---|
| 508 | stats->bytes += buf->user_len; |
---|
| 509 | stats->memory_usage += buf->len + sizeof(struct roar_buffer); |
---|
| 510 | buf = buf->next; |
---|
| 511 | } |
---|
| 512 | |
---|
| 513 | return 0; |
---|
| 514 | } |
---|
| 515 | |
---|
[3020] | 516 | int roar_buffer_ring_read (struct roar_buffer * buf, void * data, size_t * len) { |
---|
[4615] | 517 | struct roar_buffer_ring * ring; |
---|
| 518 | size_t havelen; |
---|
| 519 | size_t done; |
---|
| 520 | size_t tmp; |
---|
| 521 | |
---|
[4905] | 522 | _ckbuf(len == NULL) |
---|
| 523 | |
---|
[3020] | 524 | if ( buf == NULL || len == NULL ) |
---|
| 525 | return -1; |
---|
| 526 | |
---|
[4905] | 527 | if ( data == NULL && *len != 0 ) { |
---|
| 528 | roar_err_set(ROAR_ERROR_FAULT); |
---|
[3020] | 529 | return -1; |
---|
[4905] | 530 | } |
---|
[3020] | 531 | |
---|
[4905] | 532 | if ( !(buf->flags & ROAR_BUFFER_FLAG_RING) ) { |
---|
| 533 | roar_err_set(ROAR_ERROR_TYPEMM); |
---|
[3020] | 534 | return -1; |
---|
[4905] | 535 | } |
---|
[3020] | 536 | |
---|
| 537 | if ( *len == 0 ) |
---|
| 538 | return 0; |
---|
| 539 | |
---|
| 540 | // we may handle this later: |
---|
[4905] | 541 | if ( *len > buf->user_len ) { |
---|
| 542 | roar_err_set(ROAR_ERROR_NOTSUP); |
---|
[3020] | 543 | return -1; |
---|
[4905] | 544 | } |
---|
[3020] | 545 | |
---|
[4615] | 546 | if ( (buf->flags & ROAR_BUFFER_FLAG_FREE_RUNNING) ) { |
---|
| 547 | if ( buf->meta.ring.read_pos >= buf->user_len ) |
---|
| 548 | buf->meta.ring.read_pos -= buf->user_len; |
---|
[3020] | 549 | |
---|
[4615] | 550 | if ( (*len + buf->meta.ring.read_pos) > buf->user_len ) { |
---|
| 551 | // wraped mode: |
---|
| 552 | memcpy(data, buf->user_data+buf->meta.ring.read_pos, buf->user_len - buf->meta.ring.read_pos); |
---|
| 553 | memcpy(data, buf->user_data, *len + buf->meta.ring.read_pos - buf->user_len); |
---|
| 554 | |
---|
| 555 | buf->meta.ring.read_pos += *len; |
---|
| 556 | buf->meta.ring.read_pos -= buf->user_len; |
---|
| 557 | return 0; |
---|
| 558 | } else { |
---|
| 559 | // unwarped mode: |
---|
| 560 | memcpy(data, buf->user_data+buf->meta.ring.read_pos, *len); |
---|
| 561 | buf->meta.ring.read_pos += *len; |
---|
| 562 | return 0; |
---|
| 563 | } |
---|
| 564 | } else { |
---|
| 565 | ring = &(buf->meta.ring); |
---|
| 566 | |
---|
| 567 | if ( ring->read_pos == ring->write_pos ) { |
---|
| 568 | *len = 0; |
---|
| 569 | return 0; |
---|
| 570 | } else if ( ring->read_pos < ring->write_pos ) { |
---|
| 571 | havelen = ring->write_pos - ring->read_pos; |
---|
| 572 | |
---|
| 573 | if ( havelen > *len ) |
---|
| 574 | havelen = *len; |
---|
| 575 | |
---|
| 576 | memcpy(data, buf->user_data+ring->read_pos, havelen); |
---|
| 577 | ring->read_pos += havelen; |
---|
[3020] | 578 | |
---|
[4615] | 579 | *len = havelen; |
---|
| 580 | return 0; |
---|
| 581 | } else { // write_pos < read_pos |
---|
| 582 | done = 0; |
---|
| 583 | |
---|
| 584 | // first pass: use data up to end of buffer |
---|
| 585 | |
---|
| 586 | havelen = buf->user_len - ring->read_pos; |
---|
| 587 | |
---|
| 588 | if ( havelen > *len ) |
---|
| 589 | havelen = *len; |
---|
| 590 | |
---|
| 591 | memcpy(data, buf->user_data+ring->read_pos, havelen); |
---|
| 592 | ring->read_pos += havelen; |
---|
| 593 | |
---|
| 594 | done += havelen; |
---|
| 595 | |
---|
| 596 | if ( ring->read_pos == buf->user_len ) { |
---|
| 597 | ring->read_pos = 0; |
---|
| 598 | } |
---|
| 599 | |
---|
| 600 | // second pass: use data from strat of buffer to write pointer |
---|
| 601 | |
---|
| 602 | if ( *len > done ) { |
---|
| 603 | tmp = *len - done; |
---|
| 604 | if ( roar_buffer_ring_read(buf, data+done, &tmp) == 0 ) { |
---|
| 605 | done += tmp; |
---|
| 606 | } |
---|
| 607 | } |
---|
| 608 | |
---|
| 609 | *len = done; |
---|
| 610 | return 0; |
---|
| 611 | } |
---|
[3020] | 612 | } |
---|
| 613 | |
---|
[4905] | 614 | roar_err_set(ROAR_ERROR_UNKNOWN); |
---|
[3020] | 615 | return -1; |
---|
| 616 | } |
---|
| 617 | |
---|
| 618 | int roar_buffer_ring_write (struct roar_buffer * buf, void * data, size_t * len) { |
---|
[4624] | 619 | struct roar_buffer_ring * ring; |
---|
| 620 | size_t havelen; |
---|
| 621 | size_t done; |
---|
| 622 | size_t tmp; |
---|
| 623 | |
---|
[4625] | 624 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = ?", buf, data, len); |
---|
| 625 | |
---|
[4905] | 626 | _ckbuf(len == NULL) |
---|
[3020] | 627 | |
---|
[4905] | 628 | if ( data == NULL && *len != 0 ) { |
---|
| 629 | roar_err_set(ROAR_ERROR_FAULT); |
---|
[3020] | 630 | return -1; |
---|
[4905] | 631 | } |
---|
[3020] | 632 | |
---|
[4905] | 633 | if ( !(buf->flags & ROAR_BUFFER_FLAG_RING) ) { |
---|
| 634 | roar_err_set(ROAR_ERROR_TYPEMM); |
---|
[3020] | 635 | return -1; |
---|
[4905] | 636 | } |
---|
[3020] | 637 | |
---|
| 638 | if ( *len == 0 ) |
---|
| 639 | return 0; |
---|
| 640 | |
---|
| 641 | // we may handle this later: |
---|
[4905] | 642 | if ( *len > buf->user_len ) { |
---|
| 643 | roar_err_set(ROAR_ERROR_NOTSUP); |
---|
[3020] | 644 | return -1; |
---|
[4905] | 645 | } |
---|
[3020] | 646 | |
---|
[4615] | 647 | if ( (buf->flags & ROAR_BUFFER_FLAG_FREE_RUNNING) ) { |
---|
| 648 | if ( buf->meta.ring.write_pos >= buf->user_len ) |
---|
| 649 | buf->meta.ring.write_pos -= buf->user_len; |
---|
[3020] | 650 | |
---|
[4615] | 651 | if ( (*len + buf->meta.ring.write_pos) > buf->user_len ) { |
---|
| 652 | // wraped mode: |
---|
| 653 | memcpy(buf->user_data+buf->meta.ring.write_pos, data, buf->user_len - buf->meta.ring.write_pos); |
---|
| 654 | memcpy(buf->user_data, data, *len + buf->meta.ring.write_pos - buf->user_len); |
---|
[3020] | 655 | |
---|
[4615] | 656 | buf->meta.ring.write_pos += *len; |
---|
| 657 | buf->meta.ring.write_pos -= buf->user_len; |
---|
| 658 | return 0; |
---|
| 659 | } else { |
---|
| 660 | // unwarped mode: |
---|
| 661 | memcpy(buf->user_data+buf->meta.ring.write_pos, data, *len); |
---|
| 662 | buf->meta.ring.write_pos += *len; |
---|
| 663 | return 0; |
---|
| 664 | } |
---|
[3020] | 665 | } else { |
---|
[4624] | 666 | ring = &(buf->meta.ring); |
---|
| 667 | done = 0; |
---|
| 668 | |
---|
| 669 | 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); |
---|
| 670 | |
---|
| 671 | if ( ring->write_pos >= ring->read_pos ) { |
---|
[4625] | 672 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = ?", buf, data, len); |
---|
| 673 | |
---|
[4624] | 674 | havelen = buf->user_len - ring->write_pos; |
---|
| 675 | |
---|
| 676 | if ( ring->read_pos == 0 ) |
---|
| 677 | havelen--; |
---|
| 678 | |
---|
| 679 | if ( havelen > *len ) |
---|
| 680 | havelen = *len; |
---|
| 681 | |
---|
| 682 | memcpy(buf->user_data+ring->write_pos, data, havelen); |
---|
| 683 | |
---|
| 684 | done += havelen; |
---|
| 685 | ring->write_pos += havelen; |
---|
| 686 | |
---|
| 687 | if ( ring->write_pos == buf->user_len ) |
---|
| 688 | ring->write_pos = 0; |
---|
| 689 | |
---|
| 690 | if ( *len > done && ring->read_pos != 0 ) { |
---|
| 691 | tmp = *len - done; |
---|
| 692 | if ( roar_buffer_ring_write(buf, data+done, &tmp) == 0 ) { |
---|
| 693 | done += tmp; |
---|
| 694 | } |
---|
| 695 | } |
---|
| 696 | |
---|
| 697 | *len = done; |
---|
[4625] | 698 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = 0", buf, data, len); |
---|
[4624] | 699 | return 0; |
---|
| 700 | } else { |
---|
[4625] | 701 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = ?", buf, data, len); |
---|
| 702 | |
---|
[4624] | 703 | // test for buffer-is-full: |
---|
| 704 | if ( (ring->write_pos + 1) == ring->read_pos ) { |
---|
| 705 | *len = 0; |
---|
[4625] | 706 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = 0", buf, data, len); |
---|
[4624] | 707 | return 0; |
---|
| 708 | } |
---|
| 709 | |
---|
[4625] | 710 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = ?", buf, data, len); |
---|
| 711 | |
---|
[4624] | 712 | havelen = ring->read_pos - ring->write_pos - 1; |
---|
| 713 | |
---|
| 714 | if ( havelen > *len ) |
---|
| 715 | havelen = *len; |
---|
| 716 | |
---|
| 717 | memcpy(buf->user_data+ring->write_pos, data, havelen); |
---|
| 718 | |
---|
[4625] | 719 | ring->write_pos += havelen; |
---|
[4624] | 720 | *len = havelen; |
---|
[4625] | 721 | |
---|
| 722 | ROAR_DBG("roar_buffer_ring_write(buf=%p, data=%p, len=%p) = 0", buf, data, len); |
---|
[4624] | 723 | return 0; |
---|
| 724 | } |
---|
[3020] | 725 | } |
---|
| 726 | |
---|
[4905] | 727 | roar_err_set(ROAR_ERROR_UNKNOWN); |
---|
[3020] | 728 | return -1; |
---|
| 729 | } |
---|
| 730 | |
---|
[4625] | 731 | int roar_buffer_ring_avail(struct roar_buffer * buf, size_t * readlen, size_t * writelen) { |
---|
| 732 | struct roar_buffer_ring * ring; |
---|
| 733 | size_t have; |
---|
| 734 | |
---|
[4905] | 735 | _ckbuf(0) |
---|
[4625] | 736 | |
---|
[4905] | 737 | if ( !(buf->flags & ROAR_BUFFER_FLAG_RING) ) { |
---|
| 738 | roar_err_set(ROAR_ERROR_TYPEMM); |
---|
[4625] | 739 | return -1; |
---|
[4905] | 740 | } |
---|
[4625] | 741 | |
---|
| 742 | ring = &(buf->meta.ring); |
---|
| 743 | |
---|
| 744 | ROAR_DBG("roar_buffer_ring_avail(buf=%p, readlen=%p, writelen=%p) = ?", buf, readlen, writelen); |
---|
| 745 | |
---|
| 746 | if ( readlen != NULL ) { |
---|
| 747 | have = 0; |
---|
| 748 | |
---|
| 749 | if ( ring->write_pos >= ring->read_pos ) { |
---|
| 750 | have = ring->write_pos - ring->read_pos; |
---|
| 751 | } else { |
---|
| 752 | have = buf->user_len - ring->read_pos; |
---|
| 753 | have += ring->write_pos; |
---|
| 754 | have -= 1; |
---|
| 755 | } |
---|
| 756 | |
---|
| 757 | *readlen = have; |
---|
| 758 | ROAR_DBG("roar_buffer_ring_avail(buf=%p, readlen=%p, writelen=%p): readlen=%llu", buf, readlen, writelen, (unsigned long long int)have); |
---|
| 759 | } |
---|
| 760 | |
---|
| 761 | if ( writelen != NULL ) { |
---|
| 762 | have = 0; |
---|
| 763 | |
---|
| 764 | if ( ring->read_pos > ring->write_pos ) { |
---|
| 765 | have = ring->read_pos - ring->write_pos - 1; |
---|
| 766 | } else { |
---|
| 767 | have = buf->user_len - ring->write_pos; |
---|
| 768 | have += ring->read_pos; |
---|
| 769 | have -= 1; |
---|
| 770 | } |
---|
| 771 | |
---|
| 772 | *writelen = have; |
---|
| 773 | ROAR_DBG("roar_buffer_ring_avail(buf=%p, readlen=%p, writelen=%p): readlen=%llu", buf, readlen, writelen, (unsigned long long int)have); |
---|
| 774 | } |
---|
| 775 | |
---|
| 776 | ROAR_DBG("roar_buffer_ring_avail(buf=%p, readlen=%p, writelen=%p) = 0", buf, readlen, writelen); |
---|
| 777 | |
---|
| 778 | return 0; |
---|
| 779 | } |
---|
| 780 | |
---|
[4629] | 781 | int roar_buffer_ring_reset(struct roar_buffer * buf) { |
---|
[4905] | 782 | _ckbuf(0) |
---|
[4629] | 783 | |
---|
[4905] | 784 | if ( !(buf->flags & ROAR_BUFFER_FLAG_RING) ) { |
---|
| 785 | roar_err_set(ROAR_ERROR_TYPEMM); |
---|
[4629] | 786 | return -1; |
---|
[4905] | 787 | } |
---|
[4629] | 788 | |
---|
| 789 | buf->meta.ring.read_pos = buf->meta.ring.write_pos = 0; |
---|
| 790 | |
---|
| 791 | return 0; |
---|
| 792 | } |
---|
| 793 | |
---|
[0] | 794 | //ll |
---|