- Summary table about the operating mode of event
EventChange (Function) In french: SignalModifie Modifies the status of an event.
// Create an event
EventCreate("Let's go", eventManual, eventClose)
// Run a first thread
ThreadExecute("Thread1", threadNormal, "Thread_First")
// Locks the current thread until the event is obtained
ThreadWaitSignal()
// Run a second thread
ThreadExecute("Thread2", threadNormal, "Thread_Second")
// Locks the current thread until the event is obtained
ThreadWaitSignal()
// Modifies the event to run the threads
EventChange("Let's go", eventOpen)
//----------------------------------------------
PROCEDURE Thread_First()
Trace(dbgInfo(dbgProcess) + " - ThreadSendSignal(threadMain)")
ThreadSendSignal(threadMain)
EventWait("Let's go")
Trace(dbgInfo(dbgProcess) + " - Event received")
//--------------------------------------------
PROCEDURE Thread_Second()
Trace(dbgInfo(dbgProcess) + " - ThreadSendSignal(threadMain)")
ThreadSendSignal(threadMain)
EventWait("Let's go")
Trace(dbgInfo(dbgProcess) + " - Event received")
Syntax
EventChange(<Event> [, <New status>])
<Event>: Character string Name of the event to modify. If this event does not exist, it is automatically created with the default options (automatic mode) and in the specified status. <New status>: Optional constant Status of the event: | | | eventClose | Closes the event.
This constant is equivalent to EventClose. | eventOpen
(Default value) | Opens the event. If threads are waiting for the event, they are automatically unlocked.
This constant is equivalent to EventOpen. | | eventOpenAndClose | Opens the event, unlocks all the pending threads and closes the event.
This constant is not recommended. It is kept for backward compatibility. |
Remarks Summary table about the operating mode of event | | | | Value of EventChange | Automatic event (by default) | Manual event |
|---|
| eventOpen | A single thread is processed by the event.
The event is automatically closed once the thread is processed.
Pending threads: If there is no pending thread, the event remains open until the next thread, then it is closed.
New threads: The new threads are added to the pending queue. | The event is opened.
Pending threads: All the pending threads are processed.
New threads: If other threads arrive while the event is still open, they are processed. | | eventOpenAndClose
This constant is not recommended. It is kept for backward compatibility. | A single thread is processed by the event.
The event is automatically closed once the thread is processed.
Pending threads: If there is no pending thread, the event remains closed.
New threads: The new threads are added to the pending queue. | All the threads are processed by the event.
The event is automatically closed once all the threads are processed.
New threads: The new threads are added to the pending queue. | | eventClose | The event remains closed.
New threads: The new threads are added to the pending queue. | The event is closed.
New threads: The new threads are added to the pending queue. |
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