并发编程

Once

设置只有第一次被调用时会执行的操作,man pthread_once()

#include <pthread.h>

int pthread_once(pthread_once_t *once_control,  void (*init_routine)(void));

pthread_once_t once_control = PTHREAD_ONCE_INIT;

线程锁

线程读写锁

线程读写锁的创建初始化和销毁

创建初始化和销毁,man pthread_rwlock_init

#include <pthread.h>

int pthread_rwlock_destroy(pthread_rwlock_t *rwlock);
int pthread_rwlock_init(pthread_rwlock_t *restrict rwlock, 
       const pthread_rwlockattr_t *restrict attr);

线程读写锁的加锁解锁操作

加读锁,man pthread_rwlock_rdlock

#include <pthread.h>

int pthread_rwlock_rdlock(pthread_rwlock_t *rwlock);
int pthread_rwlock_tryrdlock(pthread_rwlock_t *rwlock);

加读锁等待超时,man pthread_rwlock_timedrdlock

#include <pthread.h>
#include <time.h>

int pthread_rwlock_timedrdlock(pthread_rwlock_t *restrict rwlock,
       const struct timespec *restrict abs_timeout);

加写锁,man pthread_rwlock_wrlock

#include <pthread.h>

int pthread_rwlock_trywrlock(pthread_rwlock_t *rwlock);
int pthread_rwlock_wrlock(pthread_rwlock_t *rwlock);

加写锁等待超时,man pthread_rwlock_timedwrlock

#include <pthread.h>
#include <time.h>

int pthread_rwlock_timedwrlock(pthread_rwlock_t *restrict rwlock,
       const struct timespec *restrict abs_timeout);

解锁,man pthread_rwlock_unlock

#include <pthread.h>

int pthread_rwlock_unlock(pthread_rwlock_t *rwlock);

线程互斥锁

线程互斥锁的创建初始化和销毁

创建初始化和销毁,man pthread_mutex_init

#include <pthread.h>

int pthread_mutex_destroy(pthread_mutex_t *mutex);
int pthread_mutex_init(pthread_mutex_t *restrict mutex,
       const pthread_mutexattr_t *restrict attr);

pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;

线程互斥锁的加锁和解锁操作

加锁解锁,man pthread_mutex_lock

#include <pthread.h>

int pthread_mutex_lock(pthread_mutex_t *mutex);
int pthread_mutex_trylock(pthread_mutex_t *mutex);

加锁等待超时,man pthread_mutex_timedlock

#include <pthread.h>
#include <time.h>

int pthread_mutex_timedlock(pthread_mutex_t *restrict mutex,
       const struct timespec *restrict abs_timeout);

解锁操作,man pthread_mutex_unlock

#include <pthread.h>

int pthread_mutex_unlock(pthread_mutex_t *mutex);

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