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3719602c PC |
1 | /* Copyright (C) 2010-2020 The RetroArch team |
2 | * | |
3 | * --------------------------------------------------------------------------------------- | |
4 | * The following license statement only applies to this file (fifo_queue.h). | |
5 | * --------------------------------------------------------------------------------------- | |
6 | * | |
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: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. | |
14 | * | |
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. | |
21 | */ | |
22 | ||
23 | #ifndef __LIBRETRO_SDK_FIFO_BUFFER_H | |
24 | #define __LIBRETRO_SDK_FIFO_BUFFER_H | |
25 | ||
26 | #include <stdint.h> | |
27 | #include <stddef.h> | |
28 | #include <stdlib.h> | |
29 | ||
30 | #include <retro_common_api.h> | |
31 | #include <retro_inline.h> | |
32 | #include <boolean.h> | |
33 | ||
34 | RETRO_BEGIN_DECLS | |
35 | ||
36 | #define FIFO_READ_AVAIL(buffer) (((buffer)->end + (((buffer)->end < (buffer)->first) ? (buffer)->size : 0)) - (buffer)->first) | |
37 | ||
38 | #define FIFO_WRITE_AVAIL(buffer) (((buffer)->size - 1) - (((buffer)->end + (((buffer)->end < (buffer)->first) ? (buffer)->size : 0)) - (buffer)->first)) | |
39 | ||
40 | #define FIFO_READ_AVAIL_NONPTR(buffer) (((buffer).end + (((buffer).end < (buffer).first) ? (buffer).size : 0)) - (buffer).first) | |
41 | ||
42 | #define FIFO_WRITE_AVAIL_NONPTR(buffer) (((buffer).size - 1) - (((buffer).end + (((buffer).end < (buffer).first) ? (buffer).size : 0)) - (buffer).first)) | |
43 | ||
44 | struct fifo_buffer | |
45 | { | |
46 | uint8_t *buffer; | |
47 | size_t size; | |
48 | size_t first; | |
49 | size_t end; | |
50 | }; | |
51 | ||
52 | typedef struct fifo_buffer fifo_buffer_t; | |
53 | ||
54 | fifo_buffer_t *fifo_new(size_t size); | |
55 | ||
56 | bool fifo_initialize(fifo_buffer_t *buf, size_t size); | |
57 | ||
58 | static INLINE void fifo_clear(fifo_buffer_t *buffer) | |
59 | { | |
60 | buffer->first = 0; | |
61 | buffer->end = 0; | |
62 | } | |
63 | ||
64 | void fifo_write(fifo_buffer_t *buffer, const void *in_buf, size_t size); | |
65 | ||
66 | void fifo_read(fifo_buffer_t *buffer, void *in_buf, size_t size); | |
67 | ||
68 | void fifo_free(fifo_buffer_t *buffer); | |
69 | ||
70 | bool fifo_deinitialize(fifo_buffer_t *buffer); | |
71 | ||
72 | ||
73 | RETRO_END_DECLS | |
74 | ||
75 | #endif |