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src/os_cpu/linux_zero/vm/orderAccess_linux_zero.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.
* Copyright 2007, 2008, 2009 Red Hat, Inc.
* 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
@@ -38,137 +38,43 @@
*/
typedef void (__kernel_dmb_t) (void);
#define __kernel_dmb (*(__kernel_dmb_t *) 0xffff0fa0)
#define FULL_MEM_BARRIER __kernel_dmb()
-#define READ_MEM_BARRIER __kernel_dmb()
-#define WRITE_MEM_BARRIER __kernel_dmb()
+#define LIGHT_MEM_BARRIER __kernel_dmb()
#else // ARM
#define FULL_MEM_BARRIER __sync_synchronize()
#ifdef PPC
-#define READ_MEM_BARRIER __asm __volatile ("isync":::"memory")
#ifdef __NO_LWSYNC__
-#define WRITE_MEM_BARRIER __asm __volatile ("sync":::"memory")
+#define LIGHT_MEM_BARRIER __asm __volatile ("sync":::"memory")
#else
-#define WRITE_MEM_BARRIER __asm __volatile ("lwsync":::"memory")
+#define LIGHT_MEM_BARRIER __asm __volatile ("lwsync":::"memory")
#endif
#else // PPC
-#define READ_MEM_BARRIER __asm __volatile ("":::"memory")
-#define WRITE_MEM_BARRIER __asm __volatile ("":::"memory")
+#define LIGHT_MEM_BARRIER __asm __volatile ("":::"memory")
#endif // PPC
#endif // ARM
+// Note: What is meant by LIGHT_MEM_BARRIER is a barrier which is sufficient
+// to provide TSO semantics, i.e. StoreStore | LoadLoad | LoadStore.
-inline void OrderAccess::loadload() { acquire(); }
-inline void OrderAccess::storestore() { release(); }
-inline void OrderAccess::loadstore() { acquire(); }
-inline void OrderAccess::storeload() { fence(); }
-
-inline void OrderAccess::acquire() {
- READ_MEM_BARRIER;
-}
-
-inline void OrderAccess::release() {
- WRITE_MEM_BARRIER;
-}
-
-inline void OrderAccess::fence() {
- FULL_MEM_BARRIER;
-}
-
-inline jbyte OrderAccess::load_acquire(volatile jbyte* p) { jbyte data = *p; acquire(); return data; }
-inline jshort OrderAccess::load_acquire(volatile jshort* p) { jshort data = *p; acquire(); return data; }
-inline jint OrderAccess::load_acquire(volatile jint* p) { jint data = *p; acquire(); return data; }
-inline jlong OrderAccess::load_acquire(volatile jlong* p) {
- jlong tmp;
- os::atomic_copy64(p, &tmp);
- acquire();
- return tmp;
-}
-inline jubyte OrderAccess::load_acquire(volatile jubyte* p) { jubyte data = *p; acquire(); return data; }
-inline jushort OrderAccess::load_acquire(volatile jushort* p) { jushort data = *p; acquire(); return data; }
-inline juint OrderAccess::load_acquire(volatile juint* p) { juint data = *p; acquire(); return data; }
-inline julong OrderAccess::load_acquire(volatile julong* p) {
- julong tmp;
- os::atomic_copy64(p, &tmp);
- acquire();
- return tmp;
-}
-inline jfloat OrderAccess::load_acquire(volatile jfloat* p) { jfloat data = *p; acquire(); return data; }
-inline jdouble OrderAccess::load_acquire(volatile jdouble* p) {
- jdouble tmp;
- os::atomic_copy64(p, &tmp);
- acquire();
- return tmp;
-}
-
-inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t* p) {
- intptr_t data = *p;
- acquire();
- return data;
-}
-inline void* OrderAccess::load_ptr_acquire(volatile void* p) {
- void *data = *(void* volatile *)p;
- acquire();
- return data;
-}
-inline void* OrderAccess::load_ptr_acquire(const volatile void* p) {
- void *data = *(void* const volatile *)p;
- acquire();
- return data;
-}
-
-inline void OrderAccess::release_store(volatile jbyte* p, jbyte v) { release(); *p = v; }
-inline void OrderAccess::release_store(volatile jshort* p, jshort v) { release(); *p = v; }
-inline void OrderAccess::release_store(volatile jint* p, jint v) { release(); *p = v; }
-inline void OrderAccess::release_store(volatile jlong* p, jlong v)
-{ release(); os::atomic_copy64(&v, p); }
-inline void OrderAccess::release_store(volatile jubyte* p, jubyte v) { release(); *p = v; }
-inline void OrderAccess::release_store(volatile jushort* p, jushort v) { release(); *p = v; }
-inline void OrderAccess::release_store(volatile juint* p, juint v) { release(); *p = v; }
-inline void OrderAccess::release_store(volatile julong* p, julong v)
-{ release(); os::atomic_copy64(&v, p); }
-inline void OrderAccess::release_store(volatile jfloat* p, jfloat v) { release(); *p = v; }
-inline void OrderAccess::release_store(volatile jdouble* p, jdouble v)
-{ release(); os::atomic_copy64(&v, p); }
-
-inline void OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { release(); *p = v; }
-inline void OrderAccess::release_store_ptr(volatile void* p, void* v)
-{ release(); *(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) { os::atomic_copy64(&v, p); 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) { os::atomic_copy64(&v, p); fence(); }
-inline void OrderAccess::store_fence(jfloat* p, jfloat v) { *p = v; fence(); }
-inline void OrderAccess::store_fence(jdouble* p, jdouble v) { os::atomic_copy64(&v, p); 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) { release_store(p, v); fence(); }
-inline void OrderAccess::release_store_fence(volatile jshort* p, jshort v) { release_store(p, v); fence(); }
-inline void OrderAccess::release_store_fence(volatile jint* p, jint v) { release_store(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) { release_store(p, v); fence(); }
-inline void OrderAccess::release_store_fence(volatile jushort* p, jushort v) { release_store(p, v); fence(); }
-inline void OrderAccess::release_store_fence(volatile juint* p, juint v) { release_store(p, v); fence(); }
-inline void OrderAccess::release_store_fence(volatile julong* p, julong v) { release_store(p, v); fence(); }
-inline void OrderAccess::release_store_fence(volatile jfloat* p, jfloat v) { release_store(p, v); fence(); }
-inline void OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { release_store(p, v); fence(); }
+inline void OrderAccess::loadload() { LIGHT_MEM_BARRIER; }
+inline void OrderAccess::storestore() { LIGHT_MEM_BARRIER; }
+inline void OrderAccess::loadstore() { LIGHT_MEM_BARRIER; }
+inline void OrderAccess::storeload() { FULL_MEM_BARRIER; }
-inline void OrderAccess::release_store_ptr_fence(volatile intptr_t* p, intptr_t v) { release_store_ptr(p, v); fence(); }
-inline void OrderAccess::release_store_ptr_fence(volatile void* p, void* v) { release_store_ptr(p, v); fence(); }
+inline void OrderAccess::acquire() { LIGHT_MEM_BARRIER; }
+inline void OrderAccess::release() { LIGHT_MEM_BARRIER; }
+
+inline void OrderAccess::fence() { FULL_MEM_BARRIER; }
+
+#define VM_HAS_GENERALIZED_ORDER_ACCESS 1
#endif // OS_CPU_LINUX_ZERO_VM_ORDERACCESS_LINUX_ZERO_INLINE_HPP
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