mirror of
https://github.com/clearlinux/kvmtool.git
synced 2026-08-21 12:57:49 +00:00
Sasha Levin
a009444e08
Adds a rwlock wrapper which like the mutex wrapper makes rwlock calls similar to their kernel counterparts. Signed-off-by: Sasha Levin <levinsasha928@gmail.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
40 lines
911 B
C
40 lines
911 B
C
#ifndef KVM__RWSEM_H
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#define KVM__RWSEM_H
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#include <pthread.h>
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#include "kvm/util.h"
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/*
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* Kernel-alike rwsem API - to make it easier for kernel developers
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* to write user-space code! :-)
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*/
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#define DECLARE_RWSEM(sem) pthread_rwlock_t sem = PTHREAD_RWLOCK_INITIALIZER
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static inline void down_read(pthread_rwlock_t *rwsem)
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{
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if (pthread_rwlock_rdlock(rwsem) != 0)
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die("unexpected pthread_rwlock_rdlock() failure!");
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}
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static inline void down_write(pthread_rwlock_t *rwsem)
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{
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if (pthread_rwlock_wrlock(rwsem) != 0)
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die("unexpected pthread_rwlock_wrlock() failure!");
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}
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static inline void up_read(pthread_rwlock_t *rwsem)
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{
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if (pthread_rwlock_unlock(rwsem) != 0)
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die("unexpected pthread_rwlock_unlock() failure!");
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}
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static inline void up_write(pthread_rwlock_t *rwsem)
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{
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if (pthread_rwlock_unlock(rwsem) != 0)
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die("unexpected pthread_rwlock_unlock() failure!");
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}
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#endif /* KVM__RWSEM_H */
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