[fpc-pascal] Semaphores removed from the rtl?
mschnell at lumino.de
Thu Jul 20 10:14:14 CEST 2017
On 19.07.2017 18:58, Karoly Balogh (Charlie/SGR) wrote:
> You are free to implement Semaphore-alike behavior using
> CriticalSections for example, which are implemented on all platforms
> which support Threading in the FPC RTL.
CriticalSection is the windows-name for Futex, and in Windows (10) the
appropriate Library call in fact is a hight performance user space Mutex.
In other environments TCriticalSection is implemented by a "Mutex"
system call (supposedly because not all archs / OSes provide "Futex"),
and seemingly pthreadlib in Linux (AFAIK) is not intended to be used
Hence, generally, CriticalSection can only be used to construct
inter-Thread Semaphores not inter-Process Semaphores.
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