53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
/** @file task.h
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* Module handling the task creation and management
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*
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* The module provides an API to create, run and manage lightweight, stack-less
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* threads (tasks). This system is based on protothreads,
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* see https://dunkels.com/adam/pt/index.html
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*/
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#ifndef _task_h_
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#define _task_h_
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//--includes--------------------------------------------------------------------
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#include <stdint.h>
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//--functions-------------------------------------------------------------------
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#define TASK(fct_name) uint8_t fct_name(uint8_t __task_context)
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#define task_begin() do { \
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_TASK_COUNT_INIT; \
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switch (__task_context) { \
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} while (0)
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#define task_end() do { \
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} \
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return _TASK_COUNT_STOP; \
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while (0)
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#define task_wait_until(cond) _task_wait_until(cond, _TASK_COUNT_INCR)
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//--internal_functions----------------------------------------------------------
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#define _TASK_COUNT_INIT enum { TASK_COUNTER_BASE = __COUNTER__ }
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#define _TASK_COUNT_INCR (uint8_t)(__COUNTER__ - TASK_COUNTER_BASE - 1)
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#define _TASK_COUNT_STOP UINT8_MAX
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#define _task(fct_name)
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#define _task_wait_until(cond, count) do { \
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case (count): \
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if (!(cond)) { \
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return count; \
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} \
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/* fall through */ \
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while (0)
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#endif //_task_h_
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