如何在 C 中获取 pthread 名称

Question

假设我创建了一个 pthread 作为 pthread_t lift_3; 和 pthread_create(&lift_1, NULL, lift, share);。当它进入 lift() 时，我怎样才能让它打印线程的实际名称？或者为线程设置一个名称？

我试过使用pthread_self()获取id，但它给出的是随机数

#include <stdio.h> 
#include <stdlib.h> 
#include <pthread.h> 
void* lift(void* ptr) 
{ 
    printf("thread name = %c\n", pthread_self()); 
    pthread_exit(NULL); 
    return NULL; 
} 

int main() 
{ 
    pthread_t lift_1; // declare thread 
    pthread_create(&lift_1, NULL, lift, NULL); 
    pthread_join(lift_1, NULL);  
    return 0; 
}

预期结果应该是thread name = lift_1

Answer 1

您正在寻找 "name of the function that the thread started in"。没有"thread name"这样的东西。调用 pthread_self 时，您会得到线程的 "id"，类似于随机生成的名称。

为了模拟过去想要的行为，我写了下面的代码：

#include <stdio.h> 
#include <stdlib.h> 
#include <pthread.h> 

// This lines means a variable that is created per-thread
__thread const char* thread_name;

void* lift(void* ptr) 
{ 
    // Paste this line in the beginning of every thread routine.
    thread_name = __FUNCTION__;

    // Note two changes in this line
    printf("thread name = %s\n", thread_name); 
    pthread_exit(NULL); 
    return NULL; 
} 

int main() 
{ 
    // Added line
    thread_name = __FUNCTION__;

    pthread_t lift_1; // declare thread 
    pthread_create(&lift_1, NULL, lift, NULL); 
    pthread_join(lift_1, NULL);  
    //Added line
    printf("Original thread name: %s\n", thread_name);
    return 0; 
}

如何在 C 中获取 pthread 名称

How to get a pthread name in C

c

pthreads