EventOpen (Function)

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EventOpen (Function)

In french: SignalOuvre

Opens a synchronization event between several threads.

Example

// Création d'un signal
AllezY is AutomaticEvent

// Exécution d'un premier thread
ThreadExecute("Thread1", threadNormal, "Thread_Premier")
// Bloque le thread en cours jusqu'à l'obtention du signal
ThreadWaitSignal()

// Exécution d'un second thread
ThreadExecute("Thread2", threadNormal, "Thread_Second")
// Bloque le thread en cours jusqu'à l'obtention du signal
ThreadWaitSignal()

// Ouvre le signal pour exécuter les threads
EventOpen(AllezY)

PROCEDURE Thread_Premier()
Trace(dbgInfo(dbgProcess) + " - ThreadEnvoieSignal(threadPrincipal)")
ThreadSendSignal(threadMain)
EventWait(Allezy)
Trace(dbgInfo(dbgProcess) + " - Signal reçu")

PROCEDURE Thread_Second()
Trace(dbgInfo(dbgProcess) + " - ThreadEnvoieSignal(threadPrincipal)")
ThreadSendSignal(threadMain)
EventWait(Allezy)
Trace(dbgInfo(dbgProcess) + " - Signal reçu")

Syntax

EventOpen(<Event>)

<Event>: Character string, or AutomaticEvent or ManualEvent variable

Name of the event to open. This name can correspond to:
a character string,
the name of a variable of type ManualEvent,
the name of a variable of type AutomaticEvent.

Remarks

This function is equivalent to the following syntax of EventChange:
SignalModifie(<Signal>, signalOuvert)
Case of an automatic signal: The signal lets a single thread through.
The event is automatically closed once the thread is processed.
- Waiting threads: If no thread was waiting, the signal remains open until the next thread passes, then closes again..
- New threads: If other threads arrive, they are put on hold.
Case of a manual signal: Signal goes to open state.
- Waiting threads: All waiting threads pass through.
- New threads: If other threads arrive while the signal is still open, they pass.

Business / UI classification: Neutral code

Component: wd300vm.dll