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PTHREAD_GETSPECIFIC(3) FreeBSD Library Functions Manual NAME pthread_getspecific - get a thread-specific data value LIBRARY POSIX Threads Library (libpthread, -lpthread) SYNOPSIS #include <pthread.h> void * pthread_getspecific(pthread_key_t key); DESCRIPTION The pthread_getspecific() function returns the value currently bound to the specified key on behalf of the calling thread. The effect of calling pthread_getspecific() with a key value not obtained from pthread_key_create() or after key has been deleted with pthread_key_delete() is undefined. The pthread_getspecific() function may be called from a thread-specific data destructor function. A call to pthread_getspecific() for the thread-specific data key being destroyed returns the value NULL, unless the value is changed (after the destructor starts) by a call to pthread_setspecific(). RETURN VALUES The pthread_getspecific() function will return the thread-specific data value associated with the given key. If no thread-specific data value is associated with key, then the value NULL is returned. ERRORS None. SEE ALSO pthread_key_create(3), pthread_key_delete(3), pthread_setspecific(3) STANDARDS The pthread_getspecific() function conforms to ISO/IEC 9945-1:1996 ("POSIX.1"). FreeBSD 14.1-RELEASE-p8 April 4, 1996 FreeBSD 14.1-RELEASE-p8