51 lines
2 KiB
C
51 lines
2 KiB
C
/*
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The MIT License (MIT)
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Copyright (c) 2016 Fred Sundvik
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, 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
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SOFTWARE.
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*/
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#ifndef SERIAL_LINK_TRIPLE_BUFFERED_OBJECT_H
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#define SERIAL_LINK_TRIPLE_BUFFERED_OBJECT_H
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#include <stdint.h>
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typedef struct {
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uint8_t state;
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uint8_t buffer[] __attribute__((aligned(4)));
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}triple_buffer_object_t;
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void triple_buffer_init(triple_buffer_object_t* object);
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#define triple_buffer_begin_write(object) \
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(typeof(*object.buffer[0])*)triple_buffer_begin_write_internal(sizeof(*object.buffer[0]), (triple_buffer_object_t*)object)
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#define triple_buffer_end_write(object) \
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triple_buffer_end_write_internal((triple_buffer_object_t*)object)
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#define triple_buffer_read(object) \
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(typeof(*object.buffer[0])*)triple_buffer_read_internal(sizeof(*object.buffer[0]), (triple_buffer_object_t*)object)
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void* triple_buffer_begin_write_internal(uint16_t object_size, triple_buffer_object_t* object);
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void triple_buffer_end_write_internal(triple_buffer_object_t* object);
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void* triple_buffer_read_internal(uint16_t object_size, triple_buffer_object_t* object);
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#endif
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