tests/loadfree.c


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/*
 * From: Todd Owen <towen@lucidcalm.dropbear.id.au>
 * To: pthreads-win32@sourceware.cygnus.com
 * Subject: invalid page fault when using LoadLibrary/FreeLibrary
 * 
 * hi,
 * for me, pthread.dll consistently causes an "invalid page fault in
 * kernel32.dll" when I load it "explicitly"...to be precise, loading (with
 * LoadLibrary) isn't a problem, it gives the error when I call FreeLibrary.
 * I guess that the dll's cleanup must be causing the error.
 * 
 * Implicit linkage of the dll has never given me this problem.  Here's a
 * program (console application) that gives me the error.
 * 
 * I compile with: mingw32 (gcc-2.95 release), with the MSVCRT add-on (not
 * that the compiler should make much difference in this case).
 * PTHREAD.DLL: is the precompiled 1999-11-02 one (I tried an older one as
 * well, with the same result).
 * 
 * Fascinatingly, if you have your own dll (mycode.dll) which implicitly
 * loads pthread.dll, and then do LoadLibrary/FreeLibrary on _this_ dll, the
 * same thing happens.
 * 
 */

#include "test.h"

int main() {
  HINSTANCE hinst;

  assert((hinst = LoadLibrary("pthread")) != (HINSTANCE) 0);

  Sleep(100);

  FreeLibrary(hinst);
  return 0;
}