66 lines
1.1 KiB
C
66 lines
1.1 KiB
C
#include <pthread.h>
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#include <semaphore.h>
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#include <stdio.h>
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static sem_t sema;
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static void* other_thread()
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{
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printf("other_thread here!\n");
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sleep(1);
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while (1)
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{
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printf("other_thread: sem_post...\n");
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if(sem_post(&sema) == -1)
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printf("sem_post failed\n");
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sleep(1);
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}
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printf("other_thread dies!\n");
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pthread_exit(0);
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}
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static void test_thread(void* parameter)
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{
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pthread_t tid;
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printf("main thread here!\n");
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printf("sleep 5 seconds...");
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sleep(5);
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printf("done\n");
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sem_init(&sema, 0, 0);
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/* create the "other" thread */
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if(pthread_create(&tid, 0, &other_thread, 0)!=0)
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/* error */
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printf("pthread_create OtherThread failed.\n");
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else
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printf("created OtherThread=%x\n", tid);
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/* let the other thread run */
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while (1)
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{
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printf("Main: sem_wait...\n");
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if(sem_wait(&sema) == -1)
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printf("sem_wait failed\n");
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printf("Main back.\n\n");
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}
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pthread_exit(0);
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}
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#include <finsh.h>
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void libc_sem()
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{
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rt_thread_t tid;
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tid = rt_thread_create("semtest", test_thread, RT_NULL,
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2048, 20, 5);
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if (tid != RT_NULL)
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{
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rt_thread_startup(tid);
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}
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}
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FINSH_FUNCTION_EXPORT(libc_sem, posix semaphore test);
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