pcsx2/3rdparty/w32pthreads/ptw32_cancel.c

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/*
* ptw32_new.c
*
* Description:
* This translation unit provides platform-specific cancelation functionality.
*
* --------------------------------------------------------------------------
*
* 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 "ptw32pch.h"
#if defined(_M_IX86) || defined(_X86_)
#define PTW32_PROGCTR(Context) ((Context).Eip)
#endif
#if defined (_M_IA64)
#define PTW32_PROGCTR(Context) ((Context).StIIP)
#endif
#if defined(_MIPS_)
#define PTW32_PROGCTR(Context) ((Context).Fir)
#endif
#if defined(_ALPHA_)
#define PTW32_PROGCTR(Context) ((Context).Fir)
#endif
#if defined(_PPC_)
#define PTW32_PROGCTR(Context) ((Context).Iar)
#endif
#if defined(_AMD64_)
#define PTW32_PROGCTR(Context) ((Context).Rip)
#endif
#if !defined(PTW32_PROGCTR)
#error Module contains CPU-specific code; modify and recompile.
#endif
static void
ptw32_cancel_self (void)
{
ptw32_throw (PTW32_EPS_CANCEL);
/* Never reached */
}
static void CALLBACK
ptw32_cancel_callback (DWORD unused)
{
ptw32_throw (PTW32_EPS_CANCEL);
/* Never reached */
}
/*
* ptw32_RegisterCancelation() -
* Must have args of same type as QueueUserAPCEx because this function
* is a substitute for QueueUserAPCEx if it's not available.
*/
DWORD
ptw32_RegisterCancelation (PAPCFUNC unused1, HANDLE threadH, DWORD unused2)
{
CONTEXT context;
context.ContextFlags = CONTEXT_CONTROL;
GetThreadContext (threadH, &context);
PTW32_PROGCTR (context) = (DWORD_PTR) ptw32_cancel_self;
SetThreadContext (threadH, &context);
return 0;
}
void ptw32_PrepCancel( ptw32_thread_t* tp )
{
HANDLE threadH = tp->threadH;
SuspendThread (threadH);
if (WaitForSingleObject (threadH, 0) == WAIT_TIMEOUT)
{
tp->state = PThreadStateCanceling;
tp->cancelState = PTHREAD_CANCEL_DISABLE;
/*
* If alertdrv and QueueUserAPCEx is available then the following
* will result in a call to QueueUserAPCEx with the args given, otherwise
* this will result in a call to ptw32_RegisterCancelation and only
* the threadH arg will be used.
*/
ptw32_register_cancelation (ptw32_cancel_callback, threadH, 0);
(void) pthread_mutex_unlock (&tp->cancelLock);
ResumeThread (threadH);
}
}