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pthread_setspecific(3)

NAME

     pthread_setspecific -- set a thread-specific data value

LIBRARY

     Reentrant C Library (libc_r, -lc_r)
     POSIX Threads Library (libpthread, -lpthread)
     1:1 Threading Library (libthr, -lthr)

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 man 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.

     The pthread_setspecific() function may be called from a thread-specific
     data destructor function, however this may result in lost storage or
     infinite loops.

RETURN VALUES

     If successful, the pthread_setspecific() function will return zero.  Oth-
     erwise an error number will be returned to indicate the error.

ERRORS

     The pthread_setspecific() function will fail if:

     [ENOMEM]		Insufficient memory exists to associate the value with
			the key.

     [EINVAL]		The key value is invalid.

SEE ALSO

     pthread_getspecific(3), pthread_key_create(3), pthread_key_delete(3)

STANDARDS

     The pthread_setspecific() function conforms to ISO/IEC 9945-1:1996
     (``POSIX.1'').

FreeBSD 5.4			 April 4, 1996			   FreeBSD 5.4

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