pthread_setspecific(3) BSD Library Functions Manual pthread_setspecific(3)
NAME
pthread_setspecific -- set a thread-specific data value
SYNOPSIS
#include <pthread.h>
int
pthread_setspecific(pthread_key_t key, const void *value);
DESCRIPTION
The pthread_setspecific() function associates a thread-specific value
with a key obtained via a previous call to pthread_key_create(). Differ-
ent threads may bind different values to the same key. These values are
typically pointers to blocks of dynamically allocated memory that have
been reserved for use by the calling thread.
The effect of calling pthread_setspecific() with a key value not obtained
from pthread_key_create(), or after key has been deleted with
pthread_key_delete(), is undefined.
pthread_setspecific() may be called from a thread-specific data destruc-
tor function; however, this may result in lost storage or infinite loops.
RETURN VALUES
If successful, the pthread_setspecific() function will return zero.
Otherwise, an error number will be returned to indicate the error.
ERRORS
pthread_setspecific() will fail if:
[EINVAL] The key value is invalid.
[ENOMEM] Insufficient memory exists to associate the value with
the key.
SEE ALSO
pthread_getspecific(3), pthread_key_create(3), pthread_key_delete(3)
STANDARDS
pthread_setspecific() conforms to ISO/IEC 9945-1:1996 (``POSIX.1'').
BSD April 4, 1996 BSD
Mac OS X 10.8 - Generated Thu Aug 30 10:17:25 CDT 2012