#include<stdio.h>
#include<pthread.h>
#include <semaphore.h>
pthread_mutex_t mutex;
void *threadfun(void *arg)
{
printf("thread1 started\n");
pthread_mutex_lock(&mutex);
if(!pthread_mutex_lock(&mutex))
printf("thread error\n");
printf("thread1 after locking\n");
printf("test\n");
pthread_mutex_unlock(&mutex);
return NULL;
}
int main()
{
pthread_t t1;
pthread_mutexattr_t attr;
pthread_mutexattr_init(&attr);
pthread_mutexattr_settype(&attr,PTHREAD_MUTEX_RECURSIVE);
pthread_mutex_init(&mutex,&attr);
pthread_create(&t1,NULL,threadfun,NULL);
pthread_join(t1,NULL);
return 0;
}
