GDI Semaphore Services

GDI provides a selection of services related to semaphores and safe semaphores. A driver can use these services to create or delete a semaphore, and acquire or release a semaphore.

Function	Description
EngAcquireSemaphore	Acquires the resource associated with the semaphore for exclusive access by the calling thread.
EngCreateSemaphore	Creates a semaphore object.
EngDeleteSafeSemaphore	Removes a reference to the specified safe semaphore.
EngDeleteSemaphore	Deletes a semaphore object from the system's resource list.
EngInitializeSafeSemaphore	Initializes the specified safe semaphore.
EngIsSemaphoreOwned	Determines whether any thread holds the specified semaphore.
EngIsSemaphoreOwnedByCurrentThread	Determines whether the currently executing thread holds the specified semaphore.
EngReleaseSemaphore	Releases the specified semaphore.