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diff --git a/MagickCore/semaphore.c b/MagickCore/semaphore.c
index a0bec447a052b8071b393f48604577f89e5128d4..f46bf67564b1acaa5a7556191f9e7a6f2c32e5d2 100644 (file)
--- a/MagickCore/semaphore.c
+++ b/MagickCore/semaphore.c
@@ -242,7 +242,8 @@ MagickExport SemaphoreInfo *AcquireSemaphoreInfo(void)
 %                                                                             %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
-%  ActivateSemaphoreInfo() acquires a semaphore.
+%  ActivateSemaphoreInfo() activates a semaphore under protection of a mutex
+%  to ensure only one thread allocates the semaphore.
 %
 %  The format of the ActivateSemaphoreInfo method is:
 %