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  • Mode for sharing the semaphores
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Stored procedures
Creates a semaphore.
Reminder: The semaphores are used to define a protected code section that can only be run by a specific number of threads.
Example
// Create a semaphore
SemaphoreCreate("MySemaphore", 3)
Syntax
SemaphoreCreate(<Semaphore Name> [, <Authorization> [, <Use> [, <Options>]]])
<Semaphore Name>: Character string (with quotes)
Name of the semaphore to create. This name will be used by all the functions for semaphore management.
<Authorization>: Optional integer
Number of concurrent threads allowed in the protected section. This parameter is set to 1 by default.
<Use>: Optional integer
Number of threads found in the section when creating the semaphore (0 by default).
<Options>: Optional Integer constant
Mode for sharing the semaphore:
shareNoneThe semaphore is specific to the application. If SemaphoreDestroy is not called, the semaphore is destroyed at the end of the application.
shareGlobalThe semaphore is shared among all the applications found on the computer.
shareUser
(default value)
The semaphore is shared among all the applications of the session of the user who is running the application.
Remarks
Reports and Queries

Mode for sharing the semaphores

In shareUser mode, the semaphore is shared among all the applications of the session of the user who runs the application.
  • The semaphore is created by the first application of the session of the user who calls SemaphoreCreate.
  • The following applications that call SemaphoreCreate connect to the existing semaphore.
  • The last application that is closed destroys the semaphore.
  • A semaphore with the same name cannot be used by a session of another user on the same computer: the system returns an error of access rights.
In shareGlobal mode, the semaphore is shared among all the applications found on the computer.
  • The semaphore is created by the first application that calls SemaphoreCreate.
  • The following applications that call SemaphoreCreate connect to the existing semaphore.
  • The last application that is closed destroys the semaphore.
Component : wd240vm.dll
Minimum version required
  • Version 9
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