[Lazarus] semaphores

[Henry Vermaak]

On 14/02/12 11:15, Michael Schnell wrote:
> On 02/14/2012 11:40 AM, Henry Vermaak wrote:
>> Look into the pthread man pages for info. I
> Usual pthread_mutex() functions are designed for working within a single
> process and thus will use Futex, if available and thus will not work
> system-wide. I don't know if pthreadlib offers an option for system wide
> Mutexes.

No, you're wrong.  Read the section named "Process Shared Memory and 
Synchronization" for an example of implementing an inter-process 
semaphore with a pthread mutex and mmap:

http://linux.die.net/man/3/pthread_mutexattr_init

Henry