pthread_unlock_global_np()--Unlock Global Mutex

 #include <pthread.h>
 int pthread_unlock_global_np(void);   

The pthread_unlock_global_np() function unlocks a global mutex provided by the pthreads run-time. The global mutex is a recursive mutex with a name of "QP0W_GLOBAL_MTX". The global mutex is not currently used by the pthreads run-time to serialize access to any system resources, and is provided for application use only.

Note: This function is not portable

Authorities and Locks

For successful completion, the global mutex lock must be held prior to calling pthread_unlock_global_np().

Parameters

None.

Return Value

0

pthread_unlock_global_np() was successful.

value

pthread_unlock_global_np() was not successful. value is set to indicate the error condition.

Error Conditions

If pthread_unlock_global_np() was not successful, the error condition returned usually indicates one of the following errors. Under some conditions, the value returned could indicate an error other than those listed here.

[EINVAL]

The value specified for the argument is not correct.

[EPERM]

The mutex is not currently held by the caller.

Related Information

• The <pthread.h> header file. See Header files for Pthread functions.
  
  
• pthread_lock_global_np()--Lock Global Mutex

Example

See Code disclaimer information for information pertaining to code examples.

See the pthread_lock_global_np() example.