In the Linux System we can use pthread for multithread programming and in the pthread there was a pthread specific data where we should first create a key. But what is the purpose of pthread specific data, i have done use google and chatgpt to knowing for what is this but i don't understand. Does this same like thread local storage ?
Pthread Specific Data In Linux System
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I take you to mean data accessed via
pthread_setspecific()andpthread_getspecific(), using keys created viapthread_key_create().Yes, pthreads thread-specific data is a form of thread-local storage. The data accessed via a given key is specific to the thread in which it is accessed. Different threads each access their own.
Additionally, it is possible to associate a destructor function with the key, which will be used, separately by each thread, to clean up the object associated with that key in that thread when the thread terminates.
Since C11, standard C has the
_Thread_localqualifier that provides a different, simpler mechanism, but does not have a provision for destructor function.