From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <pthreads-win32-return-936-listarch-pthreads-win32=sources.redhat.com@sources.redhat.com>
Received: (qmail 16570 invoked by alias); 4 Mar 2005 15:53:15 -0000
Mailing-List: contact pthreads-win32-help@sources.redhat.com; run by ezmlm
Precedence: bulk
List-Subscribe: <mailto:pthreads-win32-subscribe@sources.redhat.com>
List-Archive: <http://sources.redhat.com/ml/pthreads-win32/>
List-Post: <mailto:pthreads-win32@sources.redhat.com>
List-Help: <mailto:pthreads-win32-help@sources.redhat.com>, <http://sources.redhat.com/ml/#faqs>
Sender: pthreads-win32-owner@sources.redhat.com
Received: (qmail 16234 invoked from network); 4 Mar 2005 15:53:00 -0000
Received: from unknown (HELO rproxy.gmail.com) (64.233.170.205)
  by sourceware.org with SMTP; 4 Mar 2005 15:53:00 -0000
Received: by rproxy.gmail.com with SMTP id c51so590904rne
        for <pthreads-win32@sources.redhat.com>; Fri, 04 Mar 2005 07:52:59 -0800 (PST)
Received: by 10.38.78.56 with SMTP id a56mr77527rnb;
        Fri, 04 Mar 2005 07:52:58 -0800 (PST)
Received: by 10.38.75.68 with HTTP; Fri, 4 Mar 2005 07:52:58 -0800 (PST)
Message-ID: <acf63ee050304075267f2c5f9@mail.gmail.com>
Date: Fri, 04 Mar 2005 15:53:00 -0000
From: Dmitry Sernii <bogolt@gmail.com>
Reply-To: Dmitry Sernii <bogolt@gmail.com>
To: pthreads-win32@sources.redhat.com
Subject: Handle leak when using pthread mutex with win32 api threads
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
X-SW-Source: 2005/txt/msg00018.txt.bz2

Hello All!
I have handle leak, when using win32 api threads with pthread mutexes.
I'm using pthread-win32 2005-01-03 pthread snapshot.

Here is the sample application which reproduce the problem:

#include <pthread.h>
#include <windows.h>
#include <conio.h>

const int max_threads = 500;

DWORD WINAPI threadProc(void* param)
{
	static pthread_mutex_t mutex(PTHREAD_RECURSIVE_MUTEX_INITIALIZER);	
	pthread_mutex_lock(&mutex);		
	pthread_mutex_unlock(&mutex);
	return 0;
}

void main()
{
	DWORD id;
	HANDLE th[max_threads];
	int i;
	for (i=0;i<max_threads;i++)
		th[i]=CreateThread(0,0,threadProc,0,0,&id);
	
	for (i=0;i<max_threads;i++)
	{
		WaitForSingleObject(th[i],INFINITE);
		CloseHandle(th[i]);
	}
	getch();
}

after that if you take a look at Task Manager you can see lots of
handlers used by the program. If you replace win32 API threads with
pthreads everything works fine. Also this program works ok if you
change pthread mutexes with win32 mutexes.
The same problem happends when using QT threads (version 3.3.4
)instead of win32 api threads.

problem reproduces with MSVC 6.0 compiler.

Best Regards,
Dmitrii Sernii