sigwait portability

[Frediano Ziglio]

I'm trying to compile CommonC++ with cygwin (gcc utility and related ported to windows) but sigwait don't work. How to implement sigwait using sigsuspend (supported) ??

Something like

void wait(signo_t signo)
{
  sigset_t mask, old;

  sigemptyset(&mask);
  sigaddset(&mask, signo);
  pthread_sigmask(SIG_BLOCK, &mask, &old);
  sigsuspend(&mask);
  pthread_sigmask(SIG_UNBLOCK, &old, &mask);
}

instead of

void    wait(signo_t signo)
{
    sigset_t mask;

    sigemptyset(&mask);
    sigaddset(&mask, signo);
    sigwait(&mask, &signo);
}

work (I'm not a posix guru...) ???

[David Sugar]

In this one case it might be interesting to see if a hybradized operation could be done in cygwin.  I think sigwait is only needed to support suspend/resume functionality in pthreads.  If one can extract the win32 "handle" for the pthread thread context in cygwin, one could do a native win32 thread suspend and resume call.

[Frediano Ziglio]

Well, yesterday I tried to compile on a MacOsX (sf compile farm) and have the same problem (not sigwait). Also in MacOsX pthread_kill are not declared, so PosixThread do not compile...