Threading Question

[Sean Kelly]

On Oct 30, 2012, at 11:06 AM, Alex Rønne Petersen <alex at lycus.org> wrote:

> On 30-10-2012 19:04, Sean Kelly wrote:
>> 
>> 
>> The semaphore implementation for OSX is not signal-safe.  Originally, druntime used the signal approach on OSX and had deadlock issues in the signal handler (OSX semaphores wrap a global mutex to obtain something from a shared pool).  Also, semaphores on OSX are just ridiculously slow.  The current method for suspending and scanning threads on OSX is much faster.  I wish Posix in general had the same feature.  Using signals is really a hack.
>> 
>> It may be worth dropping use of SIGUSR1/2 in favor of the realtime signals as well, since SIGUSR1/2 are in pretty common use.
>> 
> 
> Real time signals as in?

SIGRTMIN - SIGRTMAX.  Linux supports them, but I'm not sure which other Posix OSes.