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==Syntax==
==Syntax==
<PRE>
APIRET DosFreeSpinLock ([[HSPINLOCK]] Handle)
APIRET DosFreeSpinLock ([[HSPINLOCK]] Handle)
 
</PRE>
==Parameters==
==Parameters==
; Handle : the spinlock handle returned from DosCreateSpinLock  
; Handle : the spinlock handle returned from DosCreateSpinLock  

Revision as of 13:59, 24 August 2017

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);
 }

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