[boost] Re: No semaphore in Boost.Thread

From: Alexander Terekhov (terekhov_at_[hidden])
Date: 2005-02-08 06:12:08

Serguei Kolos wrote:
[...]
> This is shame. That's why I don't understand why Boost.Thread does not
> support semaphores anymore. 

How about (quoting C++ std)

"The common subset of the C and C++ languages consists of all 
 declarations, definitions, and expressions that may appear in 
 a well formed C++ program and also in a conforming C program. 
 A POF (``plain old function'') is a function that uses only 
 features from this common subset, and that does not directly 
 or indirectly use any function that is not a POF. All signal 
 handlers shall have C linkage. A POF that could be used as a 
 signal handler in a conforming C program does not produce 
 undefined behavior when used as a signal handler in a C++ 
 program. The behavior of any other function used as a signal 
 handler in a C++ program is implementation defined." 

Implementation defined is not good for boost, oder? ;-)

Get rid of async signal handling. Use SIGEV_THREAD and/or
sig{timed}wait{info}()) and dedicated signal handling thread(s).

As for synchronous signals, use SEH-like implementation 
defined EH extensions to handle them in structured fashion.

regards,
alexander.