mirror of
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76 lines
2.7 KiB
C
76 lines
2.7 KiB
C
/* Copyright (C) 2010-2020 The RetroArch team
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*
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* ---------------------------------------------------------------------------------------
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* The following license statement only applies to this file (fifo_queue.h).
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* ---------------------------------------------------------------------------------------
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*
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* Permission is hereby granted, free of charge,
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* to any person obtaining a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef __LIBRETRO_SDK_FIFO_BUFFER_H
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#define __LIBRETRO_SDK_FIFO_BUFFER_H
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#include <stdint.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <retro_common_api.h>
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#include <retro_inline.h>
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#include <boolean.h>
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RETRO_BEGIN_DECLS
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#define FIFO_READ_AVAIL(buffer) (((buffer)->end + (((buffer)->end < (buffer)->first) ? (buffer)->size : 0)) - (buffer)->first)
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#define FIFO_WRITE_AVAIL(buffer) (((buffer)->size - 1) - (((buffer)->end + (((buffer)->end < (buffer)->first) ? (buffer)->size : 0)) - (buffer)->first))
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#define FIFO_READ_AVAIL_NONPTR(buffer) (((buffer).end + (((buffer).end < (buffer).first) ? (buffer).size : 0)) - (buffer).first)
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#define FIFO_WRITE_AVAIL_NONPTR(buffer) (((buffer).size - 1) - (((buffer).end + (((buffer).end < (buffer).first) ? (buffer).size : 0)) - (buffer).first))
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struct fifo_buffer
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{
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uint8_t *buffer;
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size_t size;
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size_t first;
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size_t end;
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};
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typedef struct fifo_buffer fifo_buffer_t;
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fifo_buffer_t *fifo_new(size_t size);
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bool fifo_initialize(fifo_buffer_t *buf, size_t size);
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static INLINE void fifo_clear(fifo_buffer_t *buffer)
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{
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buffer->first = 0;
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buffer->end = 0;
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}
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void fifo_write(fifo_buffer_t *buffer, const void *in_buf, size_t size);
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void fifo_read(fifo_buffer_t *buffer, void *in_buf, size_t size);
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void fifo_free(fifo_buffer_t *buffer);
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bool fifo_deinitialize(fifo_buffer_t *buffer);
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RETRO_END_DECLS
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#endif
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