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22.16. Win32::Semaphore
The Win32::Semaphore module implements semaphores, synchronizing access to shared resources. The constructor new creates a new semaphore object and sets the initial count and the maximum count of the semaphore. The constructor has the following syntax:
$sem = Win32::Semaphore->new(init, max, [name]);
The arguments are defined as follows:
- init
- The initial count of the semaphore
- max
- The maximum count of the semaphore
- name
- A string containing a name of the semaphore
The open constructor opens an existing semaphore object specified by name:
$sem = Win32::Semaphore->open(name);
The following methods can be used on Win32::Semaphore objects.
| release |
$sem->release(inc, [$var])
Releases a semaphore and increments the count by the amount specified in inc. The last count (before the increment) is returned in the $var variable, if provided.
| wait |
$sem->wait([timeout])
The inherited Win32::IPC call. Waits for the semaphore's count to be nonzero, then decrements it. Optional timeout is given in milliseconds.
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| 22.15. Win32::Registry |  | 22.17. Win32::Service |
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