[M3devel] Win32 SuspendThread?

[Coleburn, Randy]

Jay:

I'm very concerned about the threading not working properly on both 32-bit and 64-bit Windows.

The Thread Test program crashes for me on both platforms.

I haven't tried your new test program yet.

--Randy

From: jayk123 at hotmail.com [mailto:jayk123 at hotmail.com] On Behalf Of Jay K
Sent: Saturday, January 18, 2014 1:23 AM
To: m3devel
Subject: EXT:[M3devel] Win32 SuspendThread?

 This program also doesn't behave as expected, native, nothing to do with wow64.
 Anyone else please confirm:
   1) my expectations -- it should never print anything
   2) their importance  -- garbage collector depends on it
   3) their not being met -- stuff gets printed
 This is in the CVS repository, scratch/wow64stack/sync2.cpp
 I am following up further.
 Maybe we should get cooperative suspend really going?
Thank you.
 - Jay

#include <stdio.h>
#include <windows.h>
volatile long value;
unsigned long __stdcall Thread(PVOID parameter)
{
  while (1)
   InterlockedIncrement(&value);
  return 0;
}
int __cdecl main()
{
  HANDLE thread = CreateThread(0, 0, Thread, 0, 0, 0);
  UINT i = 0;
  while (1)
  {
    i += 1;
    if (SuspendThread(thread) == (DWORD)-1)
    {
      printf("suspend failed %X\n", GetLastError());
      Sleep(1);
      continue;
    }
    volatile long a = value;
    volatile long b = value;
    if (a != b)
    {
     printf("%d %d %d %d\n", i, a, b, b - a);
    }
    ResumeThread(thread);
  }
}
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