72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
#include <stdio.h>
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#include <pthread.h>
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#include <unistd.h>
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void clean(void *data)
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{
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printf("---已清理---\n");
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}
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void *read_line(void *path)
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{
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pthread_cleanup_push(clean, NULL); // 注册清理函数
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printf("按行读取 %s 数据\n", (char *)path);
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sleep(2);
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pthread_cleanup_pop(1); // 执行清理函数
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}
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int main(int argc, char const **argv)
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{
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if (argc != 3)
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{
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printf("usage: %s filepath1 filepath2", argv[0]);
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return 0;
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}
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pthread_attr_t attr; // 线程属性
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pthread_attr_init(&attr); // 初始化线程属性
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// 设置线程分离 （通过属性修改）
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pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
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// 获取当前线程的栈的大小
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size_t stackSize;
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pthread_attr_getstacksize(&attr, &stackSize);
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printf("线程默认的栈大小: %ld Mb\n", stackSize / 1024 / 1024);
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stackSize /= 2;
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pthread_attr_setstacksize(&attr, stackSize);
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pthread_attr_getstacksize(&attr, &stackSize);
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printf("修改后栈大小: %ld Mb\n", stackSize / 1024 / 1024);
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// 获取当前线程的优先级
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struct sched_param param;
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pthread_attr_getschedparam(&attr, ¶m);
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printf("默认线程的优先级: %d\n", param.__sched_priority);
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pthread_t tid2;
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pthread_create(&tid2, &attr, read_line, (void *)argv[2]);
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pthread_t tid;
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pthread_create(&tid, &attr, read_line, (void *)argv[1]); // 创建线程
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param.__sched_priority = 10;
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// 设置单个线程的优先级
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pthread_setschedparam(tid, SCHED_FIFO, ¶m);
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struct sched_param param2;
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param2.__sched_priority = 12;
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pthread_setschedparam(tid2, SCHED_FIFO, ¶m2);
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int detachstate;
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if (pthread_attr_getdetachstate(&attr, &detachstate) == 0) // 获取线程的分离状态
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{
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if (detachstate != PTHREAD_CREATE_DETACHED) // 如果线程不是分离状态
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{
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pthread_join(tid, NULL); // 等待线程结束
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}
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}
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sleep(3);
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pthread_attr_destroy(&attr); // 清理线程属性
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return 0;
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}
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