1 /* Copyright (C) 2010-2020 The RetroArch team
3 * ---------------------------------------------------------------------------------------
4 * The following license statement only applies to this file (fifo_queue.h).
5 * ---------------------------------------------------------------------------------------
7 * Permission is hereby granted, free of charge,
8 * to any person obtaining a copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation the rights to
10 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
11 * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
16 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
18 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
19 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 #ifndef __LIBRETRO_SDK_FIFO_BUFFER_H
24 #define __LIBRETRO_SDK_FIFO_BUFFER_H
30 #include <retro_common_api.h>
31 #include <retro_inline.h>
36 #define FIFO_READ_AVAIL(buffer) (((buffer)->end + (((buffer)->end < (buffer)->first) ? (buffer)->size : 0)) - (buffer)->first)
38 #define FIFO_WRITE_AVAIL(buffer) (((buffer)->size - 1) - (((buffer)->end + (((buffer)->end < (buffer)->first) ? (buffer)->size : 0)) - (buffer)->first))
40 #define FIFO_READ_AVAIL_NONPTR(buffer) (((buffer).end + (((buffer).end < (buffer).first) ? (buffer).size : 0)) - (buffer).first)
42 #define FIFO_WRITE_AVAIL_NONPTR(buffer) (((buffer).size - 1) - (((buffer).end + (((buffer).end < (buffer).first) ? (buffer).size : 0)) - (buffer).first))
52 typedef struct fifo_buffer fifo_buffer_t;
54 fifo_buffer_t *fifo_new(size_t size);
56 bool fifo_initialize(fifo_buffer_t *buf, size_t size);
58 static INLINE void fifo_clear(fifo_buffer_t *buffer)
64 void fifo_write(fifo_buffer_t *buffer, const void *in_buf, size_t size);
66 void fifo_read(fifo_buffer_t *buffer, void *in_buf, size_t size);
68 void fifo_free(fifo_buffer_t *buffer);
70 bool fifo_deinitialize(fifo_buffer_t *buffer);