Differences

This shows you the differences between two versions of the page.

--- action:Semaphore_Lock [2017/05/18 20:56]
JMichaelTX rewrite to add clarity and sections
+++ action:Semaphore_Lock [2019/08/24 20:43]
JMichaelTX [Preventing Multiple Executions of One or More Macros]
@@ Line 22: / Line 22: @@
 Occasionally there are cases where multiple macros can be triggered, or the same macro triggered again, before the other macros complete. This can sometimes cause a problem, which needs to be prevented.
-**The primary purpose of using a //Semaphore Lock// is to prevent simultaneous macro executions.**
+**The primary purpose of using a //Semaphore Lock// is to prevent simultaneous macro executions of the same, or related, macros.**\\
-  * To do this, just place a //Semaphore Lock// Action with the same Semaphore Name as the first action of each Macro that you wish to prevent executing simultaneously.
+In order to achieve this:
+  * Place a //Semaphore Lock// Action (using the same Semaphore Name) as the first action of each Macro that you wish to prevent executing simultaneously.
   * The lock will remain in place preventing any other macros that try to execute until the first macro completes, or until you execute a Semaphore Unlock action.
+  * You can also cause all additional macro instances to be immediately cancelled by setting a very short timeout (1 hundredth of a second) for the Semaphore Action.
 The //Semaphore actions// take a name, and different names can be used for different (independent) locks.

Keyboard Maestro Wiki