互斥锁实例：

#include <pthread.h>

pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;

int pthread_mutex_destroy(pthread_mutex_t *mutex);

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

int pthread_mutex_lock(pthread_mutex_t *mutex);

int pthread_mutex_trylock(pthread_mutex_t *mutex);

int pthread_mutex_unlock(pthread_mutex_t *mutex);

 

示例代码：

#include 
     
      #include 
      
       #define NLOOP 5000static pthread_mutex_t counter_mutex = PTHREAD_MUTEX_INITIALIZER;static int counter;void *doit(void *);int main(){    pthread_t tidA, tidB;    pthread_create(&tidA, NULL, doit, NULL);    pthread_create(&tidB, NULL, doit, NULL);    /*wait for both threads to terminate*/    pthread_join(tidA, NULL);    pthread_join(tidB, NULL);        return 0;}void *doit(void *arg){        int i, val;    for (i=0; i
      
     

运行结果：

....

71025700: 9979

71025700: 9980

71025700: 9981

71025700: 9982

71025700: 9983

71025700: 9984

71025700: 9985

71025700: 9986

71025700: 9987

71025700: 9988

71025700: 9989

71025700: 9990

71025700: 9991

71025700: 9992

71025700: 9993

71025700: 9994

71025700: 9995

71025700: 9996

71025700: 9997

71025700: 9998

71025700: 9999

71025700: 10000