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src/os_cpu/solaris_x86/vm/orderAccess_solaris_x86.inline.hpp
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@@ -1,7 +1,7 @@
/*
- * Copyright (c) 2003, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
@@ -29,110 +29,32 @@
#include "runtime/orderAccess.hpp"
#include "runtime/os.hpp"
// Implementation of class OrderAccess.
-// For Sun Studio - implementation is in solaris_i486.il.
-// For gcc - implementation is just below.
-extern "C" void _OrderAccess_acquire();
-extern "C" void _OrderAccess_fence();
-
-inline void OrderAccess::loadload() { acquire(); }
-inline void OrderAccess::storestore() { release(); }
-inline void OrderAccess::loadstore() { acquire(); }
-inline void OrderAccess::storeload() { fence(); }
-
-inline void OrderAccess::acquire() {
- _OrderAccess_acquire();
-
+// A compiler barrier, forcing the C++ compiler to invalidate all memory assumptions
+inline void compiler_barrier() {
+ __asm__ volatile ("" : : : "memory");
}
-inline void OrderAccess::release() {
- // Avoid hitting the same cache-line from
- // different threads.
- volatile jint local_dummy = 0;
-}
+inline void OrderAccess::loadload() { compiler_barrier(); }
+inline void OrderAccess::storestore() { compiler_barrier(); }
+inline void OrderAccess::loadstore() { compiler_barrier(); }
+inline void OrderAccess::storeload() { fence(); }
+
+inline void OrderAccess::acquire() { compiler_barrier(); }
+inline void OrderAccess::release() { compiler_barrier(); }
inline void OrderAccess::fence() {
if (os::is_MP()) {
- _OrderAccess_fence();
- }
-}
-
-#ifdef _GNU_SOURCE
-
-extern "C" {
- inline void _OrderAccess_acquire() {
- volatile intptr_t local_dummy;
#ifdef AMD64
- __asm__ volatile ("movq 0(%%rsp), %0" : "=r" (local_dummy) : : "memory");
+ __asm__ volatile ("lock; addl $0,0(%%rsp)" : : : "cc", "memory");
#else
- __asm__ volatile ("movl 0(%%esp),%0" : "=r" (local_dummy) : : "memory");
-#endif // AMD64
- }
- inline void _OrderAccess_fence() {
- // Always use locked addl since mfence is sometimes expensive
__asm__ volatile ("lock; addl $0,0(%%esp)" : : : "cc", "memory");
+#endif
}
-
+ compiler_barrier();
}
-#endif // GNU_SOURCE
-
-inline jbyte OrderAccess::load_acquire(volatile jbyte* p) { return *p; }
-inline jshort OrderAccess::load_acquire(volatile jshort* p) { return *p; }
-inline jint OrderAccess::load_acquire(volatile jint* p) { return *p; }
-inline jlong OrderAccess::load_acquire(volatile jlong* p) { return Atomic::load(p); }
-inline jubyte OrderAccess::load_acquire(volatile jubyte* p) { return *p; }
-inline jushort OrderAccess::load_acquire(volatile jushort* p) { return *p; }
-inline juint OrderAccess::load_acquire(volatile juint* p) { return *p; }
-inline julong OrderAccess::load_acquire(volatile julong* p) { return Atomic::load((volatile jlong*)p); }
-inline jfloat OrderAccess::load_acquire(volatile jfloat* p) { return *p; }
-inline jdouble OrderAccess::load_acquire(volatile jdouble* p) { return jdouble_cast(Atomic::load((volatile jlong*)p)); }
-
-inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t* p) { return *p; }
-inline void* OrderAccess::load_ptr_acquire(volatile void* p) { return *(void* volatile *)p; }
-inline void* OrderAccess::load_ptr_acquire(const volatile void* p) { return *(void* const volatile *)p; }
-
-inline void OrderAccess::release_store(volatile jbyte* p, jbyte v) { *p = v; }
-inline void OrderAccess::release_store(volatile jshort* p, jshort v) { *p = v; }
-inline void OrderAccess::release_store(volatile jint* p, jint v) { *p = v; }
-inline void OrderAccess::release_store(volatile jlong* p, jlong v) { Atomic::store(v, p); }
-inline void OrderAccess::release_store(volatile jubyte* p, jubyte v) { *p = v; }
-inline void OrderAccess::release_store(volatile jushort* p, jushort v) { *p = v; }
-inline void OrderAccess::release_store(volatile juint* p, juint v) { *p = v; }
-inline void OrderAccess::release_store(volatile julong* p, julong v) { Atomic::store((jlong)v, (volatile jlong*)p); }
-inline void OrderAccess::release_store(volatile jfloat* p, jfloat v) { *p = v; }
-inline void OrderAccess::release_store(volatile jdouble* p, jdouble v) { release_store((volatile jlong*)p, jlong_cast(v)); }
-
-inline void OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { *p = v; }
-inline void OrderAccess::release_store_ptr(volatile void* p, void* v) { *(void* volatile *)p = v; }
-
-inline void OrderAccess::store_fence(jbyte* p, jbyte v) { *p = v; fence(); }
-inline void OrderAccess::store_fence(jshort* p, jshort v) { *p = v; fence(); }
-inline void OrderAccess::store_fence(jint* p, jint v) { *p = v; fence(); }
-inline void OrderAccess::store_fence(jlong* p, jlong v) { *p = v; fence(); }
-inline void OrderAccess::store_fence(jubyte* p, jubyte v) { *p = v; fence(); }
-inline void OrderAccess::store_fence(jushort* p, jushort v) { *p = v; fence(); }
-inline void OrderAccess::store_fence(juint* p, juint v) { *p = v; fence(); }
-inline void OrderAccess::store_fence(julong* p, julong v) { *p = v; fence(); }
-inline void OrderAccess::store_fence(jfloat* p, jfloat v) { *p = v; fence(); }
-inline void OrderAccess::store_fence(jdouble* p, jdouble v) { *p = v; fence(); }
-
-inline void OrderAccess::store_ptr_fence(intptr_t* p, intptr_t v) { *p = v; fence(); }
-inline void OrderAccess::store_ptr_fence(void** p, void* v) { *p = v; fence(); }
-
-inline void OrderAccess::release_store_fence(volatile jbyte* p, jbyte v) { *p = v; fence(); }
-inline void OrderAccess::release_store_fence(volatile jshort* p, jshort v) { *p = v; fence(); }
-inline void OrderAccess::release_store_fence(volatile jint* p, jint v) { *p = v; fence(); }
-inline void OrderAccess::release_store_fence(volatile jlong* p, jlong v) { release_store(p, v); fence(); }
-inline void OrderAccess::release_store_fence(volatile jubyte* p, jubyte v) { *p = v; fence(); }
-inline void OrderAccess::release_store_fence(volatile jushort* p, jushort v) { *p = v; fence(); }
-inline void OrderAccess::release_store_fence(volatile juint* p, juint v) { *p = v; fence(); }
-inline void OrderAccess::release_store_fence(volatile julong* p, julong v) { release_store((jlong *)p, (jlong)v); fence(); }
-inline void OrderAccess::release_store_fence(volatile jfloat* p, jfloat v) { *p = v; fence(); }
-inline void OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { release_store_fence((volatile jlong*)p, jlong_cast(v)); }
-
-inline void OrderAccess::release_store_ptr_fence(volatile intptr_t* p, intptr_t v) { *p = v; fence(); }
-inline void OrderAccess::release_store_ptr_fence(volatile void* p, void* v) { *(void* volatile *)p = v; fence(); }
+#define VM_HAS_GENERALIZED_ORDER_ACCESS 1
#endif // OS_CPU_SOLARIS_X86_VM_ORDERACCESS_SOLARIS_X86_INLINE_HPP
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