Linux C：获取线程ID的方法（linuxc线程id）
Linux C:
How to Get the Thread ID
Linux is the most popular operating system for workstations and servers. Many people use Linux for applications that require heavy workloads and multithreading. In order to manage these workloads, it is important to be able to obtain and manage the individual thread IDs of each thread running on the system.
In this article, we’ll explore how to obtain the thread ID in Linux with C programming.
First, let’s understand how threads work. Threads are lightweight processes that run within a single process. Each thread in a single process is assigned a unique thread ID. To obtain this ID, you will use the pthread_self() library function.
The pthread_self library function will return a thread ID (type pthread_t) that is unique for each thread in the same process. Therefore, if you are running multiple threads in the same process, you need to call pthread_self for each thread to get its thread ID.
Let us have a look at a simple example program that obtains the thread ID from a pthread_t.
#include
#include
void* fun()
{
pthread_t myid = pthread_self();
printf (“Thread ID is: %ld\n”, myid);
// Return value is not used
return NULL;
}
int main()
{
// Create thread
pthread_t id;
pthread_create(&id, NULL, fun, NULL);
// Wait for thread to terminate
pthread_join(id, NULL);
return 0;
}
In this example, we create a thread, and then call the pthread_create() library function. This sends the thread to the fun() function, which then calls the pthread_self() library function to get the thread ID, which we store in the myid variable. Finally, we call the pthread_join() library function, which will wait for the thread to terminate before ending the program.
From the example above, we can see that obtaining thread IDs in Linux with C programming is a straightforward process. The pthread library can be used to obtain and manage the individual thread IDs for each thread in the same process.
In conclusion, obtaining thread IDs in Linux with C programming is a simple process. With the help of the pthread library, we can manage the individual thread IDs of each thread in the same process without any difficulty.
