pthread_mutexattr_init, pthread_mutexattr_destroy - initialise and destroy mutex attributes object
#include <pthread.h> int pthread_mutexattr_init(pthread_mutexattr_t *attr); int pthread_mutexattr_destroy(pthread_mutexattr_t *attr);
The function pthread_mutexattr_init() initialises a mutex attributes object attr with the default value for all of the attributes defined by the implementation.The effect of initialising an already initialised mutex attributes object is undefined.
After a mutex attributes object has been used to initialise one or more mutexes, any function affecting the attributes object (including destruction) does not affect any previously initialised mutexes.
The pthread_mutexattr_destroy() function destroys a mutex attributes object; the object becomes, in effect, uninitialised. An implementation may cause pthread_mutexattr_destroy() to set the object referenced by attr to an invalid value. A destroyed mutex attributes object can be re-initialised using pthread_mutexattr_init(); the results of otherwise referencing the object after it has been destroyed are undefined.
Upon successful completion, pthread_mutexattr_init() and pthread_mutexattr_destroy() return zero. Otherwise, an error number is returned to indicate the error.
The pthread_mutexattr_init() function may fail if:
- [ENOMEM]
- Insufficient memory exists to initialise the mutex attributes object.
The pthread_mutexattr_destroy() function may fail if:
- [EINVAL]
- The value specified by attr is invalid.
These functions will not return an error code of [EINTR].
None.
None.
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pthread_create(), pthread_mutex_init(), pthread_mutexattr_init(), pthread_cond_init(), <pthread.h>.
Derived from the POSIX Threads Extension (1003.1c-1995)