Hi everyone,
I've got a problem migrating several C++ based server applications from
Watcom 10.5 compiler to cygwin. The problem arises when diferent threads
get into a try/catch block concurrently. Then cygwin forces me to
include a semaphore out of try block to solve a concurrency conflict
that I didn't have using Watcom 10.5, or I don't have now only avoiding
the try/catch structure.
Source code
void A()
{
MySemaphore.Request();
try
{
}
catch(...)
{
}
catch(...)
{
}
MySemaphore.Release() ;
return;
}
works properly in multithreading, but
void A()
{
try
{
MySemaphore.Request();
}
catch(...)
{
}
catch(...)
{
}
MySemaphore.Release() ;
return;
}
gives me a concurrent problem.
Obviously without semaphores I get a concurrency error also.
I use here the semaphore in order to investigate where in the code the
problem arises. Normally I cannot use it because of performance problem.
Here is Cygwin version I'm using:
cygwin 1.3.12-2
gcc 2.95.3-5
gcc-mingw 3_1-20020516-1
I don't use pthreads emulation in order to maintain compatibility to
previos versions. So I'm using for multithreading _beginthreadex familly
funtions, the same that work using Watcom.
Could anyone give me a hint ?
Thanks in advance, Ignasi Villagrasa. GRI S.L.
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