PTHREAD_MUTEXATTR(3)					   BSD Library Functions Manual 				      PTHREAD_MUTEXATTR(3)

NAME

     pthread_mutexattr_init, pthread_mutexattr_destroy, pthread_mutexattr_setprioceiling, pthread_mutexattr_getprioceiling,
     pthread_mutexattr_setprotocol, pthread_mutexattr_getprotocol, pthread_mutexattr_settype, pthread_mutexattr_gettype -- mutex attribute opera-
     tions

LIBRARY

     POSIX Threads Library (libpthread, -lpthread)

SYNOPSIS

     #include <pthread.h>

     int
     pthread_mutexattr_init(pthread_mutexattr_t *attr);

     int
     pthread_mutexattr_destroy(pthread_mutexattr_t *attr);

     int
     pthread_mutexattr_setprioceiling(pthread_mutexattr_t *attr, int prioceiling);

     int
     pthread_mutexattr_getprioceiling(pthread_mutexattr_t *attr, int *prioceiling);

     int
     pthread_mutexattr_setprotocol(pthread_mutexattr_t *attr, int protocol);

     int
     pthread_mutexattr_getprotocol(pthread_mutexattr_t *attr, int *protocol);

     int
     pthread_mutexattr_settype(pthread_mutexattr_t *attr, int type);

     int
     pthread_mutexattr_gettype(pthread_mutexattr_t *attr, int *type);

DESCRIPTION

     Mutex attributes are used to specify parameters to pthread_mutex_init().  One attribute object can be used in multiple calls to
     pthread_mutex_init(), with or without modifications between calls.

     The pthread_mutexattr_init() function initializes attr with all the default mutex attributes.

     The pthread_mutexattr_destroy() function destroys attr.

     The pthread_mutexattr_set*() functions set the attribute that corresponds to each function name.

     The pthread_mutexattr_get*() functions copy the value of the attribute that corresponds to each function name to the location pointed to by
     the second function parameter.

RETURN VALUES

     If successful, these functions return 0.  Otherwise, an error number is returned to indicate the error.

ERRORS

     The pthread_mutexattr_init() function will fail if:

     [ENOMEM]		Out of memory.

     The pthread_mutexattr_destroy() function will fail if:

     [EINVAL]		Invalid value for attr.

     The pthread_mutexattr_setprioceiling() function will fail if:

     [EINVAL]		Invalid value for attr, or invalid value for prioceiling.

     The pthread_mutexattr_getprioceiling() function will fail if:

     [EINVAL]		Invalid value for attr.

     The pthread_mutexattr_setprotocol() function will fail if:

     [EINVAL]		Invalid value for attr, or invalid value for protocol.

     The pthread_mutexattr_getprotocol() function will fail if:

     [EINVAL]		Invalid value for attr.

     The pthread_mutexattr_settype() function will fail if:

     [EINVAL]		Invalid value for attr, or invalid value for type.

     The pthread_mutexattr_gettype() function will fail if:

     [EINVAL]		Invalid value for attr.

SEE ALSO

     pthread_mutex_init(3)

STANDARDS

     The pthread_mutexattr_init() and pthread_mutexattr_destroy() functions conform to ISO/IEC 9945-1:1996 (``POSIX.1'')

     The pthread_mutexattr_setprioceiling(), pthread_mutexattr_getprioceiling(), pthread_mutexattr_setprotocol(), pthread_mutexattr_getprotocol(),
     pthread_mutexattr_settype(), and pthread_mutexattr_gettype() functions conform to Version 2 of the Single UNIX Specification (``SUSv2'')

BSD
								    May 1, 2000 							       BSD