参考：

写了个demo：

#include

#include

static pthread_mutex_t mutex;

static pthread_cond_t cond;

static int flag = 0;

void srpthread_init()

{

pthread_mutex_init(&mutex,NULL);

pthread_cond_init(&cond,NULL);

}

void srpthread_suspend()

{

pthread_mutex_lock(&mutex);

flag--;

pthread_mutex_unlock(&mutex);

}

void srpthread_resume()

{

pthread_mutex_lock(&mutex);

flag++;

pthread_cond_signal(&cond);

pthread_mutex_unlock(&mutex);

}

void *thread_run()

{

while(1)

{

pthread_mutex_lock(&mutex);

while(flag<=0)

{

pthread_cond_wait(&cond,&mutex);

}

pthread_mutex_unlock(&mutex);

//actual work

printf("i am running!\n");

}

}

int main(int argc,char *argv[])

{

char ch;

pthread_t p1;

srpthread_init();

pthread_create(&p1,NULL,(void *)thread_run,NULL);

while(1)

{

scanf("%c",&ch);

switch(ch)

{

case 's':

srpthread_suspend();

break;

case 'r':

srpthread_resume();

break;

default:

break;

}

}

#if 0

printf("1111\n");

srpthread_resume();

printf("2222\n");

sleep(3);

printf("3333\n");

srpthread_suspend();

printf("4444\n");

#endif

return 1;

}

编译命令： gcc file.c -o file lpthread