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1 | /* |
2 | The MIT License (MIT) | |
3 | ||
4 | Copyright (c) 2016 Fred Sundvik | |
5 | ||
6 | Permission is hereby granted, free of charge, to any person obtaining a copy | |
7 | of this software and associated documentation files (the "Software"), to deal | |
8 | in the Software without restriction, including without limitation the rights | |
9 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | copies of the Software, and to permit persons to whom the Software is | |
11 | furnished to do so, subject to the following conditions: | |
12 | ||
13 | The above copyright notice and this permission notice shall be included in all | |
14 | copies or substantial portions of the Software. | |
15 | ||
16 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
19 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
22 | SOFTWARE. | |
23 | */ | |
24 | ||
25 | #ifndef SERIAL_LINK_TRIPLE_BUFFERED_OBJECT_H | |
26 | #define SERIAL_LINK_TRIPLE_BUFFERED_OBJECT_H | |
27 | ||
6873b171 FS |
28 | #include <stdint.h> |
29 | ||
50edb3d9 FS |
30 | typedef struct { |
31 | uint8_t state; | |
4ee6eadf | 32 | uint8_t buffer[] __attribute__((aligned(4))); |
50edb3d9 FS |
33 | }triple_buffer_object_t; |
34 | ||
b7059d35 | 35 | void triple_buffer_init(triple_buffer_object_t* object); |
2710361c FS |
36 | |
37 | #define triple_buffer_begin_write(object) \ | |
38 | (typeof(*object.buffer[0])*)triple_buffer_begin_write_internal(sizeof(*object.buffer[0]), (triple_buffer_object_t*)object) | |
39 | ||
40 | #define triple_buffer_end_write(object) \ | |
41 | triple_buffer_end_write_internal((triple_buffer_object_t*)object) | |
42 | ||
43 | #define triple_buffer_read(object) \ | |
44 | (typeof(*object.buffer[0])*)triple_buffer_read_internal(sizeof(*object.buffer[0]), (triple_buffer_object_t*)object) | |
45 | ||
46 | void* triple_buffer_begin_write_internal(uint16_t object_size, triple_buffer_object_t* object); | |
47 | void triple_buffer_end_write_internal(triple_buffer_object_t* object); | |
48 | void* triple_buffer_read_internal(uint16_t object_size, triple_buffer_object_t* object); | |
50edb3d9 FS |
49 | |
50 | ||
51 | #endif |