.\" Copyright (c) 1996 John Birrell . .\" All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 3. All advertising materials mentioning features or use of this software .\" must display the following acknowledgement: .\" This product includes software developed by John Birrell. .\" 4. Neither the name of the author nor the names of any co-contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .Dd April 4, 1996 .Dt PTHREAD_KEY_DELETE 3 .Os BSD 4 .Sh NAME .Nm pthread_key_delete .Nd delete a thread-specific data key .Sh SYNOPSIS .Fd #include .Ft int .Fn pthread_key_delete "pthread_key_t key" .Sh DESCRIPTION The .Fn pthread_key_delete function deletes a thread-specific data key previously returned by .Fn pthread_key_create . The thread-specific data values associated with .Fa key need not be NULL at the time that .Fn 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 .Fn pthread_key_delete is called. Any attempt to use .Fa key following the call to .Fn pthread_key_delete results in undefined behavior. .Pp The .Fn pthread_key_delete function is callable from within destructor functions. Destructor functions are not invoked by .Fn pthread_key_delete . Any destructor function that may have been associated with .Fa key will no longer be called upon thread exit. .Sh RETURN VALUES If successful, the .Fn pthread_key_delete function will return zero. Otherwise an error number will be returned to indicate the error. .Sh ERRORS .Fn pthread_key_delete will fail if: .Bl -tag -width Er .It Bq Er EINVAL The .Fa key value is invalid. .El .Pp .Sh SEE ALSO .Xr pthreads 3 , .Xr pthread_getspecific 3 , .Xr pthread_key_create 3 , .Xr pthread_setspecific 3 .Sh STANDARDS .Fn pthread_key_delete conforms to ISO/IEC 9945-1 ANSI/IEEE .Pq Dq Tn POSIX Std 1003.1 Second Edition 1996-07-12.