NAME

pthread_mutex_init - create a mutex

LIBRARY

POSIX Thread Library (libpthread, -lpthread)

SYNOPSIS



int pthread_mutex_init(pthread_mutex_t * restrict mutex, const pthread_mutexattr_t * restrict attr)

DESCRIPTION

The pthread_mutex_init() function creates a new mutex, with attributes specified with attr. If attr is NULL the default attributes are used.

RETURN VALUES

If successful, pthread_mutex_init() will return zero and put the new mutex id into mutex, otherwise an error number will be returned to indicate the error.

ERRORS

pthread_mutex_init() shall fail if:

[EAGAIN]
The system lacks the resources to initialize another mutex.

[ENOMEM]
The process cannot allocate enough memory to initialize another mutex.

pthread_mutex_init() may fail if:

[EINVAL]
The value specified by attr is invalid.

SEE ALSO

pthread_mutex_destroy(3), pthread_mutex_lock(3), pthread_mutex_trylock(3), pthread_mutex_unlock(3)

STANDARDS

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