mirror of https://github.com/PCSX2/pcsx2.git
311 lines
7.6 KiB
C
311 lines
7.6 KiB
C
/*
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* pthread_win32_attach_detach_np.c
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*
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* Description:
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* This translation unit implements non-portable thread functions.
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*
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* --------------------------------------------------------------------------
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*
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* Pthreads-win32 - POSIX Threads Library for Win32
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* Copyright(C) 1998 John E. Bossom
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* Copyright(C) 1999,2005 Pthreads-win32 contributors
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*
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* Contact Email: rpj@callisto.canberra.edu.au
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*
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* The current list of contributors is contained
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* in the file CONTRIBUTORS included with the source
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* code distribution. The list can also be seen at the
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* following World Wide Web location:
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* http://sources.redhat.com/pthreads-win32/contributors.html
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library in the file COPYING.LIB;
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* if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#include "pthread.h"
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#include "implement.h"
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/*
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* Handle to kernel32.dll
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*/
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static HINSTANCE ptw32_h_kernel32;
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/*
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* Handle to quserex.dll
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*/
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static HINSTANCE ptw32_h_quserex;
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BOOL
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pthread_win32_process_attach_np ()
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{
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BOOL result = TRUE;
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DWORD_PTR vProcessCPUs;
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DWORD_PTR vSystemCPUs;
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if( ptw32_processInitialized ) return TRUE;
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result = ptw32_processInitialize ();
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#ifdef _UWIN
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pthread_count++;
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#endif
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ptw32_features = 0;
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#if defined(NEED_PROCESS_AFFINITY_MASK)
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ptw32_smp_system = PTW32_FALSE;
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#else
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if (GetProcessAffinityMask (GetCurrentProcess (),
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&vProcessCPUs, &vSystemCPUs))
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{
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int CPUs = 0;
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DWORD_PTR bit;
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for (bit = 1; bit != 0; bit <<= 1)
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{
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if (vSystemCPUs & bit)
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{
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CPUs++;
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}
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}
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ptw32_smp_system = (CPUs > 1);
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}
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else
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{
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ptw32_smp_system = PTW32_FALSE;
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}
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#endif
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#if 0
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#ifdef WINCE
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/*
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* Load COREDLL and try to get address of InterlockedCompareExchange
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*/
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ptw32_h_kernel32 = LoadLibrary (TEXT ("COREDLL.DLL"));
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#else
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/*
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* Load KERNEL32 and try to get address of InterlockedCompareExchange
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*/
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ptw32_h_kernel32 = LoadLibrary (TEXT ("KERNEL32.DLL"));
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#endif
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// We're only using pthreads' inline version of InterlockedExchange
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ptw32_interlocked_compare_exchange =
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(PTW32_INTERLOCKED_LONG (WINAPI *)
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(PTW32_INTERLOCKED_LPLONG, PTW32_INTERLOCKED_LONG,
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PTW32_INTERLOCKED_LONG))
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#if defined(NEED_UNICODE_CONSTS)
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GetProcAddress (ptw32_h_kernel32,
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(const TCHAR *) TEXT ("InterlockedCompareExchange"));
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#else
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GetProcAddress (ptw32_h_kernel32, (LPCSTR) "InterlockedCompareExchange");
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#endif
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if (ptw32_interlocked_compare_exchange == NULL)
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{
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ptw32_interlocked_compare_exchange = ptw32_InterlockedCompareExchange;
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/*
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* If InterlockedCompareExchange is not being used, then free
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* the kernel32.dll handle now, rather than leaving it until
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* DLL_PROCESS_DETACH.
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*
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* Note: this is not a pedantic exercise in freeing unused
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* resources! It is a work-around for a bug in Windows 95
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* (see microsoft knowledge base article, Q187684) which
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* does Bad Things when FreeLibrary is called within
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* the DLL_PROCESS_DETACH code, in certain situations.
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* Since w95 just happens to be a platform which does not
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* provide InterlockedCompareExchange, the bug will be
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* effortlessly avoided.
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*/
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(void) FreeLibrary (ptw32_h_kernel32);
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ptw32_h_kernel32 = 0;
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}
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else
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{
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ptw32_features |= PTW32_SYSTEM_INTERLOCKED_COMPARE_EXCHANGE;
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}
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#endif
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/*
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* Load QUSEREX.DLL and try to get address of QueueUserAPCEx
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*/
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ptw32_h_quserex = LoadLibrary (TEXT ("QUSEREX.DLL"));
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if (ptw32_h_quserex != NULL)
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{
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ptw32_register_cancelation = (DWORD (*)(PAPCFUNC, HANDLE, DWORD))
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#if defined(NEED_UNICODE_CONSTS)
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GetProcAddress (ptw32_h_quserex,
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(const TCHAR *) TEXT ("QueueUserAPCEx"));
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#else
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GetProcAddress (ptw32_h_quserex, (LPCSTR) "QueueUserAPCEx");
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#endif
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}
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if (NULL == ptw32_register_cancelation)
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{
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ptw32_register_cancelation = ptw32_RegisterCancelation;
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if (ptw32_h_quserex != NULL)
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{
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(void) FreeLibrary (ptw32_h_quserex);
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}
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ptw32_h_quserex = 0;
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}
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else
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{
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/* Initialise QueueUserAPCEx */
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BOOL (*queue_user_apc_ex_init) (VOID);
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queue_user_apc_ex_init = (BOOL (*)(VOID))
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#if defined(NEED_UNICODE_CONSTS)
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GetProcAddress (ptw32_h_quserex,
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(const TCHAR *) TEXT ("QueueUserAPCEx_Init"));
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#else
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GetProcAddress (ptw32_h_quserex, (LPCSTR) "QueueUserAPCEx_Init");
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#endif
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if (queue_user_apc_ex_init == NULL || !queue_user_apc_ex_init ())
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{
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ptw32_register_cancelation = ptw32_RegisterCancelation;
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(void) FreeLibrary (ptw32_h_quserex);
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ptw32_h_quserex = 0;
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}
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}
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if (ptw32_h_quserex)
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{
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ptw32_features |= PTW32_ALERTABLE_ASYNC_CANCEL;
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}
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return result;
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}
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BOOL
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pthread_win32_process_detach_np ()
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{
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if (ptw32_processInitialized)
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{
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ptw32_thread_t * sp = (ptw32_thread_t *) pthread_getspecific (ptw32_selfThreadKey);
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if (sp != NULL)
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{
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/*
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* Detached threads have their resources automatically
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* cleaned up upon exit (others must be 'joined').
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*/
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if (sp->detachState == PTHREAD_CREATE_DETACHED)
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{
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ptw32_threadDestroy (sp->ptHandle);
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TlsSetValue (ptw32_selfThreadKey->key, NULL);
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}
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}
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/*
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* The DLL is being unmapped from the process's address space
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*/
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ptw32_processTerminate ();
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if (ptw32_h_quserex)
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{
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/* Close QueueUserAPCEx */
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BOOL (*queue_user_apc_ex_fini) (VOID);
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queue_user_apc_ex_fini = (BOOL (*)(VOID))
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#if defined(NEED_UNICODE_CONSTS)
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GetProcAddress (ptw32_h_quserex,
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(const TCHAR *) TEXT ("QueueUserAPCEx_Fini"));
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#else
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GetProcAddress (ptw32_h_quserex, (LPCSTR) "QueueUserAPCEx_Fini");
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#endif
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if (queue_user_apc_ex_fini != NULL)
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{
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(void) queue_user_apc_ex_fini ();
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}
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(void) FreeLibrary (ptw32_h_quserex);
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}
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if (ptw32_h_kernel32)
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{
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(void) FreeLibrary (ptw32_h_kernel32);
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}
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}
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return TRUE;
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}
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BOOL
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pthread_win32_thread_attach_np ()
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{
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return TRUE;
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}
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BOOL
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pthread_win32_thread_detach_np ()
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{
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if (ptw32_processInitialized)
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{
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/*
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* Don't use pthread_self() - to avoid creating an implicit POSIX thread handle
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* unnecessarily.
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*/
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ptw32_thread_t * sp = (ptw32_thread_t *) pthread_getspecific (ptw32_selfThreadKey);
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if (sp != NULL) // otherwise Win32 thread with no implicit POSIX handle.
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{
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ptw32_callUserDestroyRoutines (sp->ptHandle);
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(void) pthread_mutex_lock (&sp->cancelLock);
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sp->state = PThreadStateLast;
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/*
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* If the thread is joinable at this point then it MUST be joined
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* or detached explicitly by the application.
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*/
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(void) pthread_mutex_unlock (&sp->cancelLock);
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if (sp->detachState == PTHREAD_CREATE_DETACHED)
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{
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ptw32_threadDestroy (sp->ptHandle);
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TlsSetValue (ptw32_selfThreadKey->key, NULL);
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}
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}
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}
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return TRUE;
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}
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BOOL
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pthread_win32_test_features_np (int feature_mask)
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{
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return ((ptw32_features & feature_mask) == feature_mask);
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}
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