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c13062093b
Use atomic load and store in inc_stat_counter() only on SPARC and X86. Reviewed-by: iveresov
80 lines
2.5 KiB
C++
80 lines
2.5 KiB
C++
/*
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* Copyright (c) 1997, 2011, 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 SHARE_VM_MEMORY_ALLOCATION_INLINE_HPP
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#define SHARE_VM_MEMORY_ALLOCATION_INLINE_HPP
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#include "runtime/os.hpp"
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// Explicit C-heap memory management
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void trace_heap_malloc(size_t size, const char* name, void *p);
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void trace_heap_free(void *p);
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#ifndef PRODUCT
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// Increments unsigned long value for statistics (not atomic on MP).
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inline void inc_stat_counter(volatile julong* dest, julong add_value) {
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#if defined(SPARC) || defined(X86)
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// Sparc and X86 have atomic jlong (8 bytes) instructions
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julong value = Atomic::load((volatile jlong*)dest);
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value += add_value;
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Atomic::store((jlong)value, (volatile jlong*)dest);
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#else
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// possible word-tearing during load/store
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*dest += add_value;
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#endif
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}
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#endif
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// allocate using malloc; will fail if no memory available
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inline char* AllocateHeap(size_t size, const char* name = NULL) {
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char* p = (char*) os::malloc(size);
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#ifdef ASSERT
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if (PrintMallocFree) trace_heap_malloc(size, name, p);
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#else
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Unused_Variable(name);
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#endif
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if (p == NULL) vm_exit_out_of_memory(size, name);
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return p;
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}
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inline char* ReallocateHeap(char *old, size_t size, const char* name = NULL) {
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char* p = (char*) os::realloc(old,size);
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#ifdef ASSERT
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if (PrintMallocFree) trace_heap_malloc(size, name, p);
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#else
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Unused_Variable(name);
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#endif
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if (p == NULL) vm_exit_out_of_memory(size, name);
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return p;
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}
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inline void FreeHeap(void* p) {
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#ifdef ASSERT
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if (PrintMallocFree) trace_heap_free(p);
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#endif
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os::free(p);
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}
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#endif // SHARE_VM_MEMORY_ALLOCATION_INLINE_HPP
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