NAME

       pthread_mutexattr_init,   pthread_mutexattr_destroy  -  initialize  and  destroy  a  mutex
       attributes object

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);

DESCRIPTION

       The pthread_mutexattr_init() function initializes the mutex attributes object  pointed  to
       by attr with default values for all attributes defined by the implementation.

       The results of initializing an already initialized mutex attributes object are undefined.

       The  pthread_mutexattr_destroy()  function  destroys  a  mutex attribute object (making it
       uninitialized).   Once  a  mutex  attributes  object  has  been  destroyed,  it   can   be
       reinitialized with pthread_mutexattr_init().

       The results of destroying an uninitialized mutex attributes object are undefined.

RETURN VALUE

       On success, these functions return 0.  On error, they return a positive error number.

STANDARDS

       POSIX.1-2008.

HISTORY

       POSIX.1-2001.

NOTES

       Subsequent changes to a mutex attributes object do not affect mutex that have already been
       initialized using that object.

SEE ALSO

       pthread_mutex_init(3), pthread_mutexattr_getpshared(3), pthread_mutexattr_getrobust(3),
       pthreads(7)