thread-mutex

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1. mutex//mutex usage#include <pthread.h>void sample(){pthread_mutex_t work_mutex;int res = pthread_mutex_init(&work_mutex, NULL);pthread_mutex_lock(&work_mutex);//... critical sectionpthread_mutex_unlock(&work_mutex);pthread_mutex_destroy(&work_mutex);}compile:cc -D_REENTANT xx.c xx -lpthread


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