69 lines
1.4 KiB
C
69 lines
1.4 KiB
C
/*
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* Copyright (C) 2019 Intel Corporation. All rights reserved.
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* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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*/
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#include <stdio.h>
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#include <pthread.h>
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static pthread_mutex_t mutex;
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static pthread_cond_t cond;
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static void *thread(void *arg)
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{
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int *num = (int *)arg;
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pthread_mutex_lock(&mutex);
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printf("thread start \n");
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for (int i = 0; i < 10; i++) {
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*num = *num + 1;
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printf("num: %d\n", *num);
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}
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pthread_cond_signal(&cond);
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pthread_mutex_unlock(&mutex);
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printf("thread exit \n");
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return NULL;
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}
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int main(int argc, char *argv[])
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{
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pthread_t tid;
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int num = 0, ret = -1;
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if (pthread_mutex_init(&mutex, NULL) != 0) {
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printf("Failed to init mutex.\n");
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return -1;
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}
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if (pthread_cond_init(&cond, NULL) != 0) {
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printf("Failed to init cond.\n");
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goto fail1;
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}
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pthread_mutex_lock(&mutex);
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if (pthread_create(&tid, NULL, thread, &num) != 0) {
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printf("Failed to create thread.\n");
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goto fail2;
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}
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printf("cond wait start\n");
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pthread_cond_wait(&cond, &mutex);
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pthread_mutex_unlock(&mutex);
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printf("cond wait success.\n");
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if (pthread_join(tid, NULL) != 0) {
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printf("Failed to join thread.\n");
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}
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ret = 0;
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fail2:
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pthread_cond_destroy(&cond);
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fail1:
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pthread_mutex_destroy(&mutex);
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return ret;
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} |