30 lines
600 B
C
30 lines
600 B
C
#ifndef _PERF_RWSEM_H
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#define _PERF_RWSEM_H
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#include <pthread.h>
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#include "mutex.h"
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/*
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* Mutexes have additional error checking. Enable to use a mutex rather than a
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* rwlock for debugging.
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*/
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#define RWS_ERRORCHECK 0
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struct rw_semaphore {
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#if RWS_ERRORCHECK
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struct mutex mtx;
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#else
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pthread_rwlock_t lock;
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#endif
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};
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int init_rwsem(struct rw_semaphore *sem);
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int exit_rwsem(struct rw_semaphore *sem);
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int down_read(struct rw_semaphore *sem);
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int up_read(struct rw_semaphore *sem);
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int down_write(struct rw_semaphore *sem);
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int up_write(struct rw_semaphore *sem);
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#endif /* _PERF_RWSEM_H */
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