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43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
/*
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* BIRD Library -- Garbage Collector for Threads
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*
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* (c) 2020 Maria Matejka <mq@jmq.cz>
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* (c) 2020 CZ.NIC z.s.p.o.
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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_GC_H_
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#define _BIRD_GC_H_
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#include "lib/birdlib.h"
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/* Call gc_enter() before any code where a shared structure
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* may be accessed by this thread. Mostly this should be called
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* immediately after a poll() returns. */
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void gc_enter(void);
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/* Call gc_exit() when no shared structure is being held
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* by the current thread. Mostly this means calling this
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* before calling poll() which may wait for a long time. */
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void gc_exit(void);
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/* Clean up all the data which has been freed in the oldest gc round that has been already exited.
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* Returns 1 on success (there was something to clean), 0 when there is no gc round available to cleanup.
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* It is recommended to run this outside any gc round. */
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_Bool gc_cleanup(void);
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/* GC callback type */
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struct gc_callback_set {
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void (*enter)(u64, struct gc_callback_set *);
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void (*exit)(u64, struct gc_callback_set *);
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void (*cleanup)(u64, struct gc_callback_set *);
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};
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/* Register callbacks. These are called for each entered, exited and cleaned-up round.
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* The caller must keep the structure. */
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void gc_register(struct gc_callback_set *);
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void gc_unregister(struct gc_callback_set *);
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#endif
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