NAME
pthread_mutex_init —
create a mutex
SYNOPSIS
#include
<pthread.h>
int
pthread_mutex_init(pthread_mutex_t
*mutex, const
pthread_mutexattr_t *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, otherwise
attr should be initialized by calling
pthread_mutexattr_init(3).
A mutex may also be initialized by assignment with the macro PTHREAD_MUTEX_INITIALIZER.
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() will fail if:
- [
EINVAL] - The value specified by attr is invalid.
- [
ENOMEM] - The process cannot allocate enough memory to create another mutex.
SEE ALSO
pthread_mutex_destroy(3), pthread_mutex_lock(3), pthread_mutex_unlock(3), pthread_mutexattr_init(3)
STANDARDS
pthread_mutex_init() conforms to
ISO/IEC 9945-1:1996 (“POSIX.1”).