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https://gitlab.nic.cz/labs/bird.git
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e91754f5b9
In multithreaded environment, we need to pass messages between workers. This is done by queuing events to their respective queues. The double-linked list is not really useful for that as it needs locking everywhere. This commit rewrites the event subsystem to use a single-linked list where events are enqueued by a single atomic instruction and the queue is processed after atomically moving the whole queue aside.
55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
/*
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* BIRD -- I/O and event loop
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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_IO_LOOP_H_
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#define _BIRD_IO_LOOP_H_
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#include "nest/bird.h"
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#include "lib/lists.h"
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#include "lib/locking.h"
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#include "lib/resource.h"
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#include "lib/event.h"
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#include "lib/socket.h"
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extern struct birdloop main_birdloop;
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void sk_start(sock *s);
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void sk_stop(sock *s);
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void sk_reloop(sock *s, struct birdloop *loop);
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/* Start a new birdloop owned by given pool and domain */
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struct birdloop *birdloop_new(pool *p, uint order, const char *name);
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/* Stop the loop. At the end, the @stopped callback is called unlocked in tail
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* position to finish cleanup. Run birdloop_free() from that callback to free
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* the loop itself. */
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void birdloop_stop(struct birdloop *loop, void (*stopped)(void *data), void *data);
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void birdloop_stop_self(struct birdloop *loop, void (*stopped)(void *data), void *data);
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void birdloop_free(struct birdloop *loop);
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/* Get birdloop's event list */
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event_list *birdloop_event_list(struct birdloop *loop);
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/* Get birdloop's time heap */
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struct timeloop *birdloop_time_loop(struct birdloop *loop);
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/* Enter and exit the birdloop */
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void birdloop_enter(struct birdloop *loop);
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void birdloop_leave(struct birdloop *loop);
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_Bool birdloop_inside(struct birdloop *loop);
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void birdloop_mask_wakeups(struct birdloop *loop);
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void birdloop_unmask_wakeups(struct birdloop *loop);
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void birdloop_link(struct birdloop *loop);
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void birdloop_unlink(struct birdloop *loop);
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void birdloop_ping(struct birdloop *loop);
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void birdloop_init(void);
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#endif /* _BIRD_IO_LOOP_H_ */
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