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39 lines
1.0 KiB
C
39 lines
1.0 KiB
C
/*
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* BIRD Coroutines
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*
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* (c) 2017 Martin Mares <mj@ucw.cz>
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* (c) 2020 Maria Matejka <mq@jmq.cz>
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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#ifndef _BIRD_CORO_H_
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#define _BIRD_CORO_H_
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#include "lib/resource.h"
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/* A completely opaque coroutine handle. */
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struct coroutine;
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/* Coroutines are independent threads bound to pools.
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* You request a coroutine by calling coro_run().
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* It is forbidden to free a running coroutine from outside.
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* The running coroutine must free itself by rfree() before returning.
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*/
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struct coroutine *coro_run(pool *, void (*entry)(void *), void *data);
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/* Semaphores are handy to sleep and wake worker threads. */
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struct bsem;
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/* Create a semaphore. Be sure to choose such a pool that happens to be freed
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* only when the semaphore can't be waited for or posted. */
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struct bsem *bsem_new(pool *);
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/* Post a semaphore (wake the worker). */
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void bsem_post(struct bsem *);
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/* Wait for a semaphore. Never do this within a locked context. */
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void bsem_wait(struct bsem *);
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#endif
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