CreateSemaphore.md

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Function name : CreateSemaphore

Group: Synchronization - Library: kernel32

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The CreateSemaphore function creates a named or unnamed semaphore object

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Code examples:

Using the Semaphore object
Using the Semaphore object to allow only one instance of VFP application running

Declaration:

HANDLE CreateSemaphore(
    LPSECURITY_ATTRIBUTES  lpSemaphoreAttrib, //security attrib. address
    LONG  lInitialCount,	//initial count
    LONG  lMaximumCount,	//maximum count
    LPCTSTR  lpName 	//address of semaphore-object name
   );  

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FoxPro declaration:

DECLARE INTEGER CreateSemaphore IN kernel32;
	STRING @ lpSemaphoreAttrib,;
	INTEGER  lInitialCount,;
	INTEGER  lMaximumCount,;
	STRING   lpName
  

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Parameters:

lpSemaphoreAttributes Points to a SECURITY_ATTRIBUTES structure

lInitialCount Specifies an initial count for the semaphore object

lMaximumCount Specifies the maximum count for the semaphore object

lpName Points to a null-terminated string specifying the name of the semaphore object

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Return value:

If the function succeeds, the return value is a handle of the semaphore object

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