From 3562e78743202e43aec8727005182a2558117eca Mon Sep 17 00:00:00 2001 From: marha Date: Sun, 28 Jun 2009 22:07:26 +0000 Subject: Checked in the following released items: xkeyboard-config-1.4.tar.gz ttf-bitstream-vera-1.10.tar.gz font-alias-1.0.1.tar.gz font-sun-misc-1.0.0.tar.gz font-sun-misc-1.0.0.tar.gz font-sony-misc-1.0.0.tar.gz font-schumacher-misc-1.0.0.tar.gz font-mutt-misc-1.0.0.tar.gz font-misc-misc-1.0.0.tar.gz font-misc-meltho-1.0.0.tar.gz font-micro-misc-1.0.0.tar.gz font-jis-misc-1.0.0.tar.gz font-isas-misc-1.0.0.tar.gz font-dec-misc-1.0.0.tar.gz font-daewoo-misc-1.0.0.tar.gz font-cursor-misc-1.0.0.tar.gz font-arabic-misc-1.0.0.tar.gz font-winitzki-cyrillic-1.0.0.tar.gz font-misc-cyrillic-1.0.0.tar.gz font-cronyx-cyrillic-1.0.0.tar.gz font-screen-cyrillic-1.0.1.tar.gz font-xfree86-type1-1.0.1.tar.gz font-adobe-utopia-type1-1.0.1.tar.gz font-ibm-type1-1.0.0.tar.gz font-bitstream-type1-1.0.0.tar.gz font-bitstream-speedo-1.0.0.tar.gz font-bh-ttf-1.0.0.tar.gz font-bh-type1-1.0.0.tar.gz font-bitstream-100dpi-1.0.0.tar.gz font-bh-lucidatypewriter-100dpi-1.0.0.tar.gz font-bh-100dpi-1.0.0.tar.gz font-adobe-utopia-100dpi-1.0.1.tar.gz font-adobe-100dpi-1.0.0.tar.gz font-util-1.0.1.tar.gz font-bitstream-75dpi-1.0.0.tar.gz font-bh-lucidatypewriter-75dpi-1.0.0.tar.gz font-adobe-utopia-75dpi-1.0.1.tar.gz font-bh-75dpi-1.0.0.tar.gz bdftopcf-1.0.1.tar.gz font-adobe-75dpi-1.0.0.tar.gz mkfontscale-1.0.6.tar.gz openssl-0.9.8k.tar.gz bigreqsproto-1.0.2.tar.gz xtrans-1.2.2.tar.gz resourceproto-1.0.2.tar.gz inputproto-1.4.4.tar.gz compositeproto-0.4.tar.gz damageproto-1.1.0.tar.gz zlib-1.2.3.tar.gz xkbcomp-1.0.5.tar.gz freetype-2.3.9.tar.gz pthreads-w32-2-8-0-release.tar.gz pixman-0.12.0.tar.gz kbproto-1.0.3.tar.gz evieext-1.0.2.tar.gz fixesproto-4.0.tar.gz recordproto-1.13.2.tar.gz randrproto-1.2.2.tar.gz scrnsaverproto-1.1.0.tar.gz renderproto-0.9.3.tar.gz xcmiscproto-1.1.2.tar.gz fontsproto-2.0.2.tar.gz xextproto-7.0.3.tar.gz xproto-7.0.14.tar.gz libXdmcp-1.0.2.tar.gz libxkbfile-1.0.5.tar.gz libfontenc-1.0.4.tar.gz libXfont-1.3.4.tar.gz libX11-1.1.5.tar.gz libXau-1.0.4.tar.gz libxcb-1.1.tar.gz xorg-server-1.5.3.tar.gz --- pthreads/ptw32_InterlockedCompareExchange.c | 303 ++++++++++++++++++++++++++++ 1 file changed, 303 insertions(+) create mode 100644 pthreads/ptw32_InterlockedCompareExchange.c (limited to 'pthreads/ptw32_InterlockedCompareExchange.c') diff --git a/pthreads/ptw32_InterlockedCompareExchange.c b/pthreads/ptw32_InterlockedCompareExchange.c new file mode 100644 index 000000000..0094635f6 --- /dev/null +++ b/pthreads/ptw32_InterlockedCompareExchange.c @@ -0,0 +1,303 @@ +/* + * ptw32_InterlockedCompareExchange.c + * + * Description: + * This translation unit implements routines which are private to + * the implementation and may be used throughout it. + * + * -------------------------------------------------------------------------- + * + * 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" + + +/* + * ptw32_InterlockedCompareExchange -- + * + * Originally needed because W9x doesn't support InterlockedCompareExchange. + * We now use this version wherever possible so we can inline it. + */ + +PTW32_INTERLOCKED_LONG WINAPI +ptw32_InterlockedCompareExchange (PTW32_INTERLOCKED_LPLONG location, + PTW32_INTERLOCKED_LONG value, + PTW32_INTERLOCKED_LONG comparand) +{ + +#if defined(__WATCOMC__) +/* Don't report that result is not assigned a value before being referenced */ +#pragma disable_message (200) +#endif + + PTW32_INTERLOCKED_LONG result; + + /* + * Using the LOCK prefix on uni-processor machines is significantly slower + * and it is not necessary. The overhead of the conditional below is + * negligible in comparison. Since an optimised DLL will inline this + * routine, this will be faster than calling the system supplied + * Interlocked routine, which appears to avoid the LOCK prefix on + * uniprocessor systems. So one DLL works for all systems. + */ + if (ptw32_smp_system) + +/* *INDENT-OFF* */ + +#if defined(_M_IX86) || defined(_X86_) + +#if defined(_MSC_VER) || defined(__WATCOMC__) || (defined(__BORLANDC__) && defined(HAVE_TASM32)) +#define HAVE_INLINABLE_INTERLOCKED_CMPXCHG + { + _asm { + PUSH ecx + PUSH edx + MOV ecx,dword ptr [location] + MOV edx,dword ptr [value] + MOV eax,dword ptr [comparand] + LOCK CMPXCHG dword ptr [ecx],edx + MOV dword ptr [result], eax + POP edx + POP ecx + } + } + else + { + _asm { + PUSH ecx + PUSH edx + MOV ecx,dword ptr [location] + MOV edx,dword ptr [value] + MOV eax,dword ptr [comparand] + CMPXCHG dword ptr [ecx],edx + MOV dword ptr [result], eax + POP edx + POP ecx + } + } + +#elif defined(__GNUC__) +#define HAVE_INLINABLE_INTERLOCKED_CMPXCHG + + { + __asm__ __volatile__ + ( + "lock\n\t" + "cmpxchgl %2,%1" /* if (EAX == [location]) */ + /* [location] = value */ + /* else */ + /* EAX = [location] */ + :"=a" (result) + :"m" (*location), "r" (value), "a" (comparand)); + } + else + { + __asm__ __volatile__ + ( + "cmpxchgl %2,%1" /* if (EAX == [location]) */ + /* [location] = value */ + /* else */ + /* EAX = [location] */ + :"=a" (result) + :"m" (*location), "r" (value), "a" (comparand)); + } + +#endif + +#else + + /* + * If execution gets to here then we're running on a currently + * unsupported processor or compiler. + */ + + result = 0; + +#endif + +/* *INDENT-ON* */ + + return result; + +#if defined(__WATCOMC__) +#pragma enable_message (200) +#endif + +} + +/* + * ptw32_InterlockedExchange -- + * + * We now use this version wherever possible so we can inline it. + */ + +LONG WINAPI +ptw32_InterlockedExchange (LPLONG location, + LONG value) +{ + +#if defined(__WATCOMC__) +/* Don't report that result is not assigned a value before being referenced */ +#pragma disable_message (200) +#endif + + LONG result; + + /* + * The XCHG instruction always locks the bus with or without the + * LOCKED prefix. This makes it significantly slower than CMPXCHG on + * uni-processor machines. The Windows InterlockedExchange function + * is nearly 3 times faster than the XCHG instruction, so this routine + * is not yet very useful for speeding up pthreads. + */ + if (ptw32_smp_system) + +/* *INDENT-OFF* */ + +#if defined(_M_IX86) || defined(_X86_) + +#if defined(_MSC_VER) || defined(__WATCOMC__) || (defined(__BORLANDC__) && defined(HAVE_TASM32)) +#define HAVE_INLINABLE_INTERLOCKED_XCHG + + { + _asm { + PUSH ecx + MOV ecx,dword ptr [location] + MOV eax,dword ptr [value] + XCHG dword ptr [ecx],eax + MOV dword ptr [result], eax + POP ecx + } + } + else + { + /* + * Faster version of XCHG for uni-processor systems because + * it doesn't lock the bus. If an interrupt or context switch + * occurs between the MOV and the CMPXCHG then the value in + * 'location' may have changed, in which case we will loop + * back to do the MOV again. + * + * FIXME! Need memory barriers for the MOV+CMPXCHG combo? + * + * Tests show that this routine has almost identical timing + * to Win32's InterlockedExchange(), which is much faster than + * using the inlined 'xchg' instruction above, so it's probably + * doing something similar to this (on UP systems). + * + * Can we do without the PUSH/POP instructions? + */ + _asm { + PUSH ecx + PUSH edx + MOV ecx,dword ptr [location] + MOV edx,dword ptr [value] +L1: MOV eax,dword ptr [ecx] + CMPXCHG dword ptr [ecx],edx + JNZ L1 + MOV dword ptr [result], eax + POP edx + POP ecx + } + } + +#elif defined(__GNUC__) +#define HAVE_INLINABLE_INTERLOCKED_XCHG + + { + __asm__ __volatile__ + ( + "xchgl %2,%1" + :"=r" (result) + :"m" (*location), "0" (value)); + } + else + { + /* + * Faster version of XCHG for uni-processor systems because + * it doesn't lock the bus. If an interrupt or context switch + * occurs between the movl and the cmpxchgl then the value in + * 'location' may have changed, in which case we will loop + * back to do the movl again. + * + * FIXME! Need memory barriers for the MOV+CMPXCHG combo? + * + * Tests show that this routine has almost identical timing + * to Win32's InterlockedExchange(), which is much faster than + * using the an inlined 'xchg' instruction, so it's probably + * doing something similar to this (on UP systems). + */ + __asm__ __volatile__ + ( + "0:\n\t" + "movl %1,%%eax\n\t" + "cmpxchgl %2,%1\n\t" + "jnz 0b" + :"=&a" (result) + :"m" (*location), "r" (value)); + } + +#endif + +#else + + /* + * If execution gets to here then we're running on a currently + * unsupported processor or compiler. + */ + + result = 0; + +#endif + +/* *INDENT-ON* */ + + return result; + +#if defined(__WATCOMC__) +#pragma enable_message (200) +#endif + +} + + +#if 1 + +#if defined(PTW32_BUILD_INLINED) && defined(HAVE_INLINABLE_INTERLOCKED_CMPXCHG) +#undef PTW32_INTERLOCKED_COMPARE_EXCHANGE +#define PTW32_INTERLOCKED_COMPARE_EXCHANGE ptw32_InterlockedCompareExchange +#endif + +#if defined(PTW32_BUILD_INLINED) && defined(HAVE_INLINABLE_INTERLOCKED_XCHG) +#undef PTW32_INTERLOCKED_EXCHANGE +#define PTW32_INTERLOCKED_EXCHANGE ptw32_InterlockedExchange +#endif + +#endif -- cgit v1.2.3