DosFreeSpinLock

Free a subsystem spinlock

Syntax

APIRET DosFreeSpinLock (HSPINLOCK Handle)

Parameters

Handle

the spinlock handle returned from DosCreateSpinLock

Return Code

• NO_ERROR
• ERROR_INVALID_HANDLE

Remarks

DosFreeSpinLock frees a spinlock created by a call to DosCreateSpinLock.

Example Code

#define INCL_DOSSPINLOCK
 #include <os2.h>
 HSPINLOCK hspin;
 
 thread1() {
   //acquire spinlock
   DosAcquireSpinLock(hspin);
   //do something that only takes a few microseconds
   ...
   //release spinlock
   DosReleaseSpinLock(hspin);
 }
 
 void main() {
   //create spinlock
   DosCreateSpinLock(&hspin);
   //do something
   ...
   //destroy spinlock
   DosFreeSpinLock(hspin);
 }