pcsx2/3rdparty/w32pthreads/pthread_win32_attach_detach...

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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) 1999,2005 Pthreads-win32 contributors
*
* Contact Email: rpj@callisto.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;
/*
* Handle to quserex.dll
*/
static HINSTANCE ptw32_h_quserex;
BOOL
pthread_win32_process_attach_np ()
{
BOOL result = TRUE;
DWORD_PTR vProcessCPUs;
DWORD_PTR vSystemCPUs;
if( ptw32_processInitialized ) return TRUE;
result = ptw32_processInitialize ();
#ifdef _UWIN
pthread_count++;
#endif
ptw32_features = 0;
#if defined(NEED_PROCESS_AFFINITY_MASK)
ptw32_smp_system = PTW32_FALSE;
#else
if (GetProcessAffinityMask (GetCurrentProcess (),
&vProcessCPUs, &vSystemCPUs))
{
int CPUs = 0;
DWORD_PTR bit;
for (bit = 1; bit != 0; bit <<= 1)
{
if (vSystemCPUs & bit)
{
CPUs++;
}
}
ptw32_smp_system = (CPUs > 1);
}
else
{
ptw32_smp_system = PTW32_FALSE;
}
#endif
#if 0
#ifdef WINCE
/*
* Load COREDLL and try to get address of InterlockedCompareExchange
*/
ptw32_h_kernel32 = LoadLibrary (TEXT ("COREDLL.DLL"));
#else
/*
* Load KERNEL32 and try to get address of InterlockedCompareExchange
*/
ptw32_h_kernel32 = LoadLibrary (TEXT ("KERNEL32.DLL"));
#endif
// We're only using pthreads' inline version of InterlockedExchange
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
{
ptw32_features |= PTW32_SYSTEM_INTERLOCKED_COMPARE_EXCHANGE;
}
#endif
/*
* Load QUSEREX.DLL and try to get address of QueueUserAPCEx
*/
ptw32_h_quserex = LoadLibrary (TEXT ("QUSEREX.DLL"));
if (ptw32_h_quserex != NULL)
{
ptw32_register_cancelation = (DWORD (*)(PAPCFUNC, HANDLE, DWORD))
#if defined(NEED_UNICODE_CONSTS)
GetProcAddress (ptw32_h_quserex,
(const TCHAR *) TEXT ("QueueUserAPCEx"));
#else
GetProcAddress (ptw32_h_quserex, (LPCSTR) "QueueUserAPCEx");
#endif
}
if (NULL == ptw32_register_cancelation)
{
ptw32_register_cancelation = ptw32_RegisterCancelation;
if (ptw32_h_quserex != NULL)
{
(void) FreeLibrary (ptw32_h_quserex);
}
ptw32_h_quserex = 0;
}
else
{
/* Initialise QueueUserAPCEx */
BOOL (*queue_user_apc_ex_init) (VOID);
queue_user_apc_ex_init = (BOOL (*)(VOID))
#if defined(NEED_UNICODE_CONSTS)
GetProcAddress (ptw32_h_quserex,
(const TCHAR *) TEXT ("QueueUserAPCEx_Init"));
#else
GetProcAddress (ptw32_h_quserex, (LPCSTR) "QueueUserAPCEx_Init");
#endif
if (queue_user_apc_ex_init == NULL || !queue_user_apc_ex_init ())
{
ptw32_register_cancelation = ptw32_RegisterCancelation;
(void) FreeLibrary (ptw32_h_quserex);
ptw32_h_quserex = 0;
}
}
if (ptw32_h_quserex)
{
ptw32_features |= PTW32_ALERTABLE_ASYNC_CANCEL;
}
return result;
}
BOOL
pthread_win32_process_detach_np ()
{
if (ptw32_processInitialized)
{
ptw32_thread_t * sp = (ptw32_thread_t *) pthread_getspecific (ptw32_selfThreadKey);
if (sp != NULL)
{
/*
* Detached threads have their resources automatically
* cleaned up upon exit (others must be 'joined').
*/
if (sp->detachState == PTHREAD_CREATE_DETACHED)
{
ptw32_threadDestroy (sp->ptHandle);
TlsSetValue (ptw32_selfThreadKey->key, NULL);
}
}
/*
* The DLL is being unmapped from the process's address space
*/
ptw32_processTerminate ();
if (ptw32_h_quserex)
{
/* Close QueueUserAPCEx */
BOOL (*queue_user_apc_ex_fini) (VOID);
queue_user_apc_ex_fini = (BOOL (*)(VOID))
#if defined(NEED_UNICODE_CONSTS)
GetProcAddress (ptw32_h_quserex,
(const TCHAR *) TEXT ("QueueUserAPCEx_Fini"));
#else
GetProcAddress (ptw32_h_quserex, (LPCSTR) "QueueUserAPCEx_Fini");
#endif
if (queue_user_apc_ex_fini != NULL)
{
(void) queue_user_apc_ex_fini ();
}
(void) FreeLibrary (ptw32_h_quserex);
}
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)
{
/*
* Don't use pthread_self() - to avoid creating an implicit POSIX thread handle
* unnecessarily.
*/
ptw32_thread_t * sp = (ptw32_thread_t *) pthread_getspecific (ptw32_selfThreadKey);
if (sp != NULL) // otherwise Win32 thread with no implicit POSIX handle.
{
ptw32_callUserDestroyRoutines (sp->ptHandle);
(void) pthread_mutex_lock (&sp->cancelLock);
sp->state = PThreadStateLast;
/*
* If the thread is joinable at this point then it MUST be joined
* or detached explicitly by the application.
*/
(void) pthread_mutex_unlock (&sp->cancelLock);
if (sp->detachState == PTHREAD_CREATE_DETACHED)
{
ptw32_threadDestroy (sp->ptHandle);
TlsSetValue (ptw32_selfThreadKey->key, NULL);
}
}
}
return TRUE;
}
BOOL
pthread_win32_test_features_np (int feature_mask)
{
return ((ptw32_features & feature_mask) == feature_mask);
}