pthread_key_delete(3) - NetBSD Manual Pages

PTHREAD_KEY_DELETE(3)   NetBSD Library Functions Manual  PTHREAD_KEY_DELETE(3)


NAME
pthread_key_delete -- delete a thread-specific data key
LIBRARY
POSIX Threads Library (libpthread, -lpthread)
SYNOPSIS
#include <pthread.h> int pthread_key_delete(pthread_key_t key);
DESCRIPTION
The pthread_key_delete() function deletes a thread-specific data key pre- viously returned by pthread_key_create(). The thread-specific data val- ues associated with key need not be NULL at the time that pthread_key_delete() is called. It is the responsibility of the applica- tion 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. Oth- erwise an error number will be returned to indicate the error.
ERRORS
pthread_key_delete() may 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'').
BUGS
The current specifications of pthread_key_create() and pthread_key_delete() are flawed and do not permit a clean implementation without potential problems. The current implementation of these func- tions NetBSD in addresses these problems by not supporting key reuse. NetBSD 5.0.1 January 30, 2003 NetBSD 5.0.1

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