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法律学C 语言的 pthread_cancel()
threa_cancel() 用于通过线程 ID 取消特定线程。此函数向线程发送一个终止请求。pthread_cancel() 的语法如下 −
int pthread_cancel(pthread_t th);
现在，让我们看看如何使用此函数取消线程。
示例
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <pthread.h>
int count = 0;
pthread_t sample_thread;
void* thread_one_func(void* p) {
while (1) {
printf("This is thread 1
");
sleep(1); // wait for 1 seconds
count++;
if (count == 5) {
//if the counter is 5, then request to cancel thread two and exit from current thread
pthread_cancel(sample_thread);
pthread_exit(NULL);
}
}
}
void* thread_two_func(void* p) {
sample_thread = pthread_self(); //store the id of thread 2
while (1) {
printf("This is thread 2
");
sleep(2); // wit for 2 seconds
}
}
main() {
pthread_t t1, t2;
//create two threads
pthread_create(&t1, NULL, thread_one_func, NULL);
pthread_create(&t2, NULL, thread_two_func, NULL);
//wait for completing threads
pthread_join(t1, NULL);
pthread_join(t2, NULL);
}输出
This is thread 2 This is thread 1 This is thread 1 This is thread 2 This is thread 1 This is thread 1 This is thread 1 This is thread 2 This is thread 2 This is thread 2 This is thread 2 This is thread 2 This is thread 2 This is thread 2 This is thread 2 This is thread 2 This is thread 2 This is thread 2 This is thread 2
更新于: 2019 年 7 月 30 日
622 次浏览
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