DosCloseMuxWaitSem: Difference between revisions
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DosCloseMuxWaitSem decrements the usage count of a specified MuxWait semaphore. If the usage count of the semaphore reaches zero, the system frees the MuxWait semaphore resources. | DosCloseMuxWaitSem decrements the usage count of a specified MuxWait semaphore. If the usage count of the semaphore reaches zero, the system frees the MuxWait semaphore resources. | ||
==Syntax== | |||
DosCloseMuxWaitSem( ''hmuxSemaphore'' ) | |||
== Parameters == | |||
;HMUX ''hmuxSemaphore'' (input):The handle of the MuxWait semaphore to be closed. | ;HMUX ''hmuxSemaphore'' (input):The handle of the MuxWait semaphore to be closed. | ||
=== Returns === | === Returns === | ||
;APIRET rc:The following values can be returned | |||
The following values can be returned | :0 - NO_ERROR - Operation was successful. | ||
:6 - ERROR_INVALID_HANDLE - Error, The value in ''hmuxSemaphore'' does not point to a valid semaphore | |||
:301 - ERROR_SEM_BUSY - Error, Another thread is currently blocking on this MuxWait semaphore. | |||
successful. | |||
semaphore | |||
Another thread is currently blocking on this MuxWait semaphore. | |||
=== Sample Code === | === Sample Code === | ||
<PRE> | <PRE> | ||
#define INCL_DOSSEMAPHORES | #define INCL_DOSSEMAPHORES | ||
#include | #include <os2.h> | ||
HMUX hmuxMySemaphore; /* MySemaphore handle */ | HMUX hmuxMySemaphore; /* MySemaphore handle */ | ||
/* access is gained to the semaphore in question */ | /* access is gained to the semaphore in question */ | ||
Revision as of 18:46, 1 December 2018
DosCloseMuxWaitSem decrements the usage count of a specified MuxWait semaphore. If the usage count of the semaphore reaches zero, the system frees the MuxWait semaphore resources.
Syntax
DosCloseMuxWaitSem( hmuxSemaphore )
Parameters
- HMUX hmuxSemaphore (input)
- The handle of the MuxWait semaphore to be closed.
Returns
- APIRET rc
- The following values can be returned
- 0 - NO_ERROR - Operation was successful.
- 6 - ERROR_INVALID_HANDLE - Error, The value in hmuxSemaphore does not point to a valid semaphore
- 301 - ERROR_SEM_BUSY - Error, Another thread is currently blocking on this MuxWait semaphore.
Sample Code
#define INCL_DOSSEMAPHORES
#include <os2.h>
HMUX hmuxMySemaphore; /* MySemaphore handle */
/* access is gained to the semaphore in question */
/* either by DosCreateMuxWaitSem ... */
/* ... or by DosOpenMuxWaitSem */
/* its handle is placed in hmuxMySemaphore */
rc = DosCloseMuxWaitSem(hmuxMySemaphore);
if (rc != 0)
{
/* We got an error to take care of. */
}