author | trims |
Thu, 27 May 2010 19:08:38 -0700 | |
changeset 5547 | f4b087cbb361 |
parent 1 | 489c9b5090e2 |
child 7397 | 5b173b4ca846 |
permissions | -rw-r--r-- |
1 | 1 |
/* |
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* Copyright (c) 1999, 2005, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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// The following alternative implementations are needed because |
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// Windows 95 doesn't support (some of) the corresponding Windows NT |
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// calls. Furthermore, these versions allow inlining in the caller. |
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// (More precisely: The documentation for InterlockedExchange says |
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// it is supported for Windows 95. However, when single-stepping |
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// through the assembly code we cannot step into the routine and |
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// when looking at the routine address we see only garbage code. |
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// Better safe then sorry!). Was bug 7/31/98 (gri). |
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// |
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// Performance note: On uniprocessors, the 'lock' prefixes are not |
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// necessary (and expensive). We should generate separate cases if |
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// this becomes a performance problem. |
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#pragma warning(disable: 4035) // Disables warnings reporting missing return statement |
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inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; } |
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inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; } |
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inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; } |
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inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; } |
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inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; } |
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inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; } |
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inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; } |
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inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; } |
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inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; } |
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inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; } |
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// Adding a lock prefix to an instruction on MP machine |
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// VC++ doesn't like the lock prefix to be on a single line |
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// so we can't insert a label after the lock prefix. |
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// By emitting a lock prefix, we can define a label after it. |
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#define LOCK_IF_MP(mp) __asm cmp mp, 0 \ |
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__asm je L0 \ |
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__asm _emit 0xF0 \ |
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__asm L0: |
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#ifdef AMD64 |
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inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; } |
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inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; } |
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inline jint Atomic::add (jint add_value, volatile jint* dest) { |
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return (jint)(*os::atomic_add_func)(add_value, dest); |
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} |
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inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) { |
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return (intptr_t)(*os::atomic_add_ptr_func)(add_value, dest); |
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} |
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inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) { |
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return (void*)(*os::atomic_add_ptr_func)(add_value, (volatile intptr_t*)dest); |
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} |
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inline void Atomic::inc (volatile jint* dest) { |
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(void)add (1, dest); |
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} |
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inline void Atomic::inc_ptr(volatile intptr_t* dest) { |
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(void)add_ptr(1, dest); |
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} |
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inline void Atomic::inc_ptr(volatile void* dest) { |
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(void)add_ptr(1, dest); |
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} |
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inline void Atomic::dec (volatile jint* dest) { |
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(void)add (-1, dest); |
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} |
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inline void Atomic::dec_ptr(volatile intptr_t* dest) { |
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(void)add_ptr(-1, dest); |
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} |
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inline void Atomic::dec_ptr(volatile void* dest) { |
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(void)add_ptr(-1, dest); |
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} |
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inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) { |
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return (jint)(*os::atomic_xchg_func)(exchange_value, dest); |
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} |
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inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) { |
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return (intptr_t)(os::atomic_xchg_ptr_func)(exchange_value, dest); |
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} |
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inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) { |
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return (void *)(os::atomic_xchg_ptr_func)((intptr_t)exchange_value, (volatile intptr_t*)dest); |
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} |
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inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) { |
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return (*os::atomic_cmpxchg_func)(exchange_value, dest, compare_value); |
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} |
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inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) { |
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return (*os::atomic_cmpxchg_long_func)(exchange_value, dest, compare_value); |
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} |
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inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) { |
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return (intptr_t)cmpxchg((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value); |
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} |
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inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) { |
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return (void*)cmpxchg((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value); |
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} |
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#else // !AMD64 |
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//inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; } |
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//inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; } |
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inline jint Atomic::add (jint add_value, volatile jint* dest) { |
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int mp = os::is_MP(); |
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__asm { |
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mov edx, dest; |
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mov eax, add_value; |
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mov ecx, eax; |
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LOCK_IF_MP(mp) |
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xadd dword ptr [edx], eax; |
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add eax, ecx; |
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} |
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} |
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inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) { |
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return (intptr_t)add((jint)add_value, (volatile jint*)dest); |
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} |
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inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) { |
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return (void*)add((jint)add_value, (volatile jint*)dest); |
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} |
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inline void Atomic::inc (volatile jint* dest) { |
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// alternative for InterlockedIncrement |
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int mp = os::is_MP(); |
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__asm { |
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mov edx, dest; |
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LOCK_IF_MP(mp) |
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add dword ptr [edx], 1; |
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} |
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} |
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inline void Atomic::inc_ptr(volatile intptr_t* dest) { |
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inc((volatile jint*)dest); |
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} |
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inline void Atomic::inc_ptr(volatile void* dest) { |
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inc((volatile jint*)dest); |
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} |
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inline void Atomic::dec (volatile jint* dest) { |
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// alternative for InterlockedDecrement |
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int mp = os::is_MP(); |
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__asm { |
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mov edx, dest; |
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LOCK_IF_MP(mp) |
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sub dword ptr [edx], 1; |
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} |
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} |
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inline void Atomic::dec_ptr(volatile intptr_t* dest) { |
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dec((volatile jint*)dest); |
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} |
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inline void Atomic::dec_ptr(volatile void* dest) { |
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dec((volatile jint*)dest); |
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} |
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inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) { |
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// alternative for InterlockedExchange |
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__asm { |
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mov eax, exchange_value; |
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mov ecx, dest; |
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xchg eax, dword ptr [ecx]; |
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} |
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} |
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inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) { |
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return (intptr_t)xchg((jint)exchange_value, (volatile jint*)dest); |
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} |
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inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) { |
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return (void*)xchg((jint)exchange_value, (volatile jint*)dest); |
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} |
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inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) { |
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// alternative for InterlockedCompareExchange |
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int mp = os::is_MP(); |
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__asm { |
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mov edx, dest |
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mov ecx, exchange_value |
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mov eax, compare_value |
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LOCK_IF_MP(mp) |
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cmpxchg dword ptr [edx], ecx |
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} |
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} |
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inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) { |
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int mp = os::is_MP(); |
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jint ex_lo = (jint)exchange_value; |
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jint ex_hi = *( ((jint*)&exchange_value) + 1 ); |
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jint cmp_lo = (jint)compare_value; |
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jint cmp_hi = *( ((jint*)&compare_value) + 1 ); |
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__asm { |
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push ebx |
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push edi |
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mov eax, cmp_lo |
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mov edx, cmp_hi |
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mov edi, dest |
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mov ebx, ex_lo |
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mov ecx, ex_hi |
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LOCK_IF_MP(mp) |
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cmpxchg8b qword ptr [edi] |
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pop edi |
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pop ebx |
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} |
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} |
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inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) { |
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return (intptr_t)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value); |
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} |
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inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) { |
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return (void*)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value); |
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} |
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#endif // AMD64 |
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#pragma warning(default: 4035) // Enables warnings reporting missing return statement |