Linux线程通信－－信号量（例子）

#include <stdio.h>#include <stdlib.h>#include <semaphore.h>#include <pthread.h>sem_t smt;void DisplayData(){printf ("Display a frame/n");}void *ThreadFuncDisplay(void *arg){while (1){printf ("sem_wait............................../n");sem_wait (&smt);DisplayData();}}void *ThreadFuncControl(void *arg){while (1){sleep (3);sem_post (&smt);printf ("sem_post/n");}}int main(int argc, char *argv[]){gtk_init (&argc, &argv);int rt;pthread_tpt_dsp;pthread_tpt_ctrl;rt = sem_init (&smt, 0, 0);if (rt){perror ("semaphore initialization failed");}pthread_create (&pt_dsp, NULL, ThreadFuncDisplay, NULL);pthread_create (&pt_ctrl, NULL, ThreadFuncControl, NULL);gtk_main();return 0;}