[Mingw-users] resumption from signal handler

[David L. <le...@cs...>]

Hi,

MinGW 1.1
gcc 2.95.3-6

The program below demonstrates that execution is not resumed
after a signal is handled.  This program does work properly when
built with Cygwin's gcc.

Is this a known problem?  If not, any suggestions on how to fix
it?

I just need this behavior at just one place in a program (blocked
on select ()).  Unfortunately, setjmp/longjmp doesn't seem to help.
Any other alternatives?

Thanks,
David

8<----------8<----------8<----------8<----------8<----------8<----------8<----

/* Demonstrates that execution doesn't resume after a signal
   is caught and handled, when built with MinGW g++ 2.95.3-4.
   To build:
     gcc -o resume.exe resume.c -W -Wall
   To run:
     resume.exe
     then Ctrl-C after the "start sleep" printout appears.  The
     "should see this message" printout should always appear.
     It doesn't when build with MinGW's gcc 2.95.3-4.
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <errno.h>

void
sig_handler (int sig) {
  printf ("caught signal %d\n", sig);
}

int
main () {
  if (signal (SIGINT, sig_handler) == SIG_ERR) {
    fprintf (stderr, "failed to install signal handler");
    return -1;
  }

  printf ("start sleep\n");
#ifdef _WIN32
  _sleep (4000);
#else
  sleep (4);
#endif

  printf ("should see this message; finished sleep with errno %d\n",
          errno);

  return 0;
}