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/*
* pthread_win32_attach_detach_np.c
*
* Description:
* This translation unit implements non-portable thread functions.
*
* --------------------------------------------------------------------------
*
* Pthreads-win32 - POSIX Threads Library for Win32
* Copyright(C) 1998 John E. Bossom
* Copyright(C) 1999,2002 Pthreads-win32 contributors
*
* Contact Email: rpj@ise.canberra.edu.au
*
* The current list of contributors is contained
* in the file CONTRIBUTORS included with the source
* code distribution. The list can also be seen at the
* following World Wide Web location:
* http://sources.redhat.com/pthreads-win32/contributors.html
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library in the file COPYING.LIB;
* if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include "pthread.h"
#include "implement.h"
/*
* Handle to kernel32.dll
*/
static HINSTANCE ptw32_h_kernel32;
BOOL
pthread_win32_process_attach_np ()
{
BOOL result = TRUE;
result = ptw32_processInitialize ();
#ifdef _UWIN
pthread_count++;
#endif
#ifndef TEST_ICE
/*
* Load KERNEL32 and try to get address of InterlockedCompareExchange
*/
ptw32_h_kernel32 = LoadLibrary(TEXT("KERNEL32.DLL"));
ptw32_interlocked_compare_exchange =
(PTW32_INTERLOCKED_LONG (WINAPI *)(PTW32_INTERLOCKED_LPLONG, PTW32_INTERLOCKED_LONG, PTW32_INTERLOCKED_LONG))
#if defined(NEED_UNICODE_CONSTS)
GetProcAddress(ptw32_h_kernel32,
(const TCHAR *)TEXT("InterlockedCompareExchange"));
#else
GetProcAddress(ptw32_h_kernel32,
(LPCSTR) "InterlockedCompareExchange");
#endif
if (ptw32_interlocked_compare_exchange == NULL)
{
ptw32_interlocked_compare_exchange = ptw32_InterlockedCompareExchange;
/*
* If InterlockedCompareExchange is not being used, then free
* the kernel32.dll handle now, rather than leaving it until
* DLL_PROCESS_DETACH.
*
* Note: this is not a pedantic exercise in freeing unused
* resources! It is a work-around for a bug in Windows 95
* (see microsoft knowledge base article, Q187684) which
* does Bad Things when FreeLibrary is called within
* the DLL_PROCESS_DETACH code, in certain situations.
* Since w95 just happens to be a platform which does not
* provide InterlockedCompareExchange, the bug will be
* effortlessly avoided.
*/
(void) FreeLibrary(ptw32_h_kernel32);
ptw32_h_kernel32 = 0;
}
#else /* TEST_ICE */
ptw32_interlocked_compare_exchange = ptw32_InterlockedCompareExchange;
#endif /* TEST_ICE */
return result;
}
BOOL
pthread_win32_process_detach_np ()
{
if (ptw32_processInitialized)
{
pthread_t self = (pthread_t) pthread_getspecific (ptw32_selfThreadKey);
/*
* Detached threads have their resources automatically
* cleaned up upon exit (others must be 'joined').
*/
if (self != NULL &&
self->detachState == PTHREAD_CREATE_DETACHED)
{
pthread_setspecific (ptw32_selfThreadKey, NULL);
ptw32_threadDestroy (self);
}
/*
* The DLL is being unmapped into the process's address space
*/
ptw32_processTerminate ();
if (ptw32_h_kernel32)
{
(void) FreeLibrary(ptw32_h_kernel32);
}
}
return TRUE;
}
BOOL
pthread_win32_thread_attach_np ()
{
return TRUE;
}
BOOL
pthread_win32_thread_detach_np ()
{
if (ptw32_processInitialized)
{
pthread_t self = (pthread_t) pthread_getspecific (ptw32_selfThreadKey);
/*
* Detached threads have their resources automatically
* cleaned up upon exit (others must be 'joined').
*/
if (self != NULL &&
self->detachState == PTHREAD_CREATE_DETACHED)
{
pthread_setspecific (ptw32_selfThreadKey, NULL);
ptw32_threadDestroy (self);
}
}
return TRUE;
}
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