hotspot/src/os_cpu/windows_x86/vm/atomic_windows_x86.inline.hpp
author stefank
Tue, 23 Nov 2010 13:22:55 -0800
changeset 7397 5b173b4ca846
parent 5547 f4b087cbb361
child 7885 c02b05ba16a1
permissions -rw-r--r--
6989984: Use standard include model for Hospot Summary: Replaced MakeDeps and the includeDB files with more standardized solutions. Reviewed-by: coleenp, kvn, kamg
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/*
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 * Copyright (c) 1999, 2010, 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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#ifndef OS_CPU_WINDOWS_X86_VM_ATOMIC_WINDOWS_X86_INLINE_HPP
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#define OS_CPU_WINDOWS_X86_VM_ATOMIC_WINDOWS_X86_INLINE_HPP
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#include "orderAccess_windows_x86.inline.hpp"
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#include "runtime/atomic.hpp"
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#include "runtime/os.hpp"
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#include "vm_version_x86.hpp"
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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
7397
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#endif // OS_CPU_WINDOWS_X86_VM_ATOMIC_WINDOWS_X86_INLINE_HPP