44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
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#ifndef __LKDHASH_H__
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#define __LKDHASH_H__
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// This is intended to be used in conjunction with uthash and libglvnd_pthread.
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#include "glvnd_pthread.h"
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#include "uthash.h"
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/*
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* Macros for defining a "locked hash": a hashtable protected by a lock.
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*/
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#define DEFINE_LKDHASH(_hashtype, _hashname) \
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struct { \
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_hashtype *hash; \
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glvnd_rwlock_t lock; \
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} _hashname
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#define DEFINE_INITIALIZED_LKDHASH(_hashtype, _hashname) \
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struct { \
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_hashtype *hash; \
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glvnd_rwlock_t lock; \
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} _hashname = { NULL, GLVND_RWLOCK_INITIALIZER }
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#define LKDHASH_INIT(imp, _lockedhash) do { \
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(_lockedhash).hash = NULL; \
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(imp).rwlock_init(&(_lockedhash).lock, NULL); \
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} while (0)
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/*
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* Macros for locking/unlocking the locked hash.
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*/
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#define LKDHASH_RDLOCK(imp, _lockedhash) \
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(imp).rwlock_rdlock(&(_lockedhash).lock)
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#define LKDHASH_WRLOCK(imp, _lockedhash) \
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(imp).rwlock_wrlock(&(_lockedhash).lock)
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#define LKDHASH_UNLOCK(imp, _lockedhash) \
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(imp).rwlock_unlock(&(_lockedhash).lock)
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/*
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* Converts a locked hash into a hash suitable for use with uthash.
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*/
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#define _LH(_lockedhash) ((_lockedhash).hash)
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#endif
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