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PTHREAD_KEY_DELETE(3) FreeBSD Library Functions Manual PTHREAD_KEY_DELETE(3) NAME pthread_key_delete - delete a thread-specific data key SYNOPSIS #include <pthread.h> int pthread_key_delete(pthread_key_t key); DESCRIPTION The pthread_key_delete() function deletes a thread-specific data key previously returned by pthread_key_create(). The thread-specific data values associated with key need not be NULL at the time that pthread_key_delete() is called. It is the responsibility of the application to free any application storage or perform any cleanup actions for data structures related to the deleted key or associated thread-specific data in any threads; this cleanup can be done either before or after pthread_key_delete() is called. Any attempt to use key following the call to pthread_key_delete() results in undefined behavior. The pthread_key_delete() function is callable from within destructor functions. Destructor functions are not invoked by pthread_key_delete(). Any destructor function that may have been associated with key will no longer be called upon thread exit. RETURN VALUES If successful, the pthread_key_delete() function will return zero. Otherwise an error number will be returned to indicate the error. ERRORS pthread_key_delete() will fail if: [EINVAL] The key value is invalid. SEE ALSO pthread_getspecific(3), pthread_key_create(3), pthread_setspecific(3) STANDARDS pthread_key_delete() conforms to ISO/IEC 9945-1:1996 ("POSIX.1"). FreeBSD 14.1-RELEASE-p8 June 5, 2013 FreeBSD 14.1-RELEASE-p8