Hello,
On 29/07/2015 12:00, fpc-pascal-requ...@lists.freepascal.org wrote:
A counting, or general, semaphore limits simultaneous access to a
resource according to the number of permits you specify. On the other
hand, a binary semaphore like a critical section limits the access to
"one at a time".
Seems, you confuse a little semaphores and critical sections.
In general, semaphores are inter-process but critical sections are not.
I mean that semaphores allow synchronize processes whereas critical
sections are designed to synchronize the threads within the same process.
Some frameworks (i.e. .NET) provide classes like "threading semaphore"
but it is very particular case.
It is possible to use real semaphores to synchronize the threads too
(with some overhead).
Regards,
Serguei
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