2362N/A * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. 0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 0N/A * This code is free software; you can redistribute it and/or modify it 0N/A * under the terms of the GNU General Public License version 2 only, as 2362N/A * published by the Free Software Foundation. 2362N/A * This code is distributed in the hope that it will be useful, but WITHOUT 0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 0N/A * version 2 for more details (a copy is included in the LICENSE file that 0N/A * accompanied this code). 0N/A * You should have received a copy of the GNU General Public License version 0N/A * 2 along with this work; if not, write to the Free Software Foundation, 0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 0N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 0N/A// ThreadCritical is used to protect short non-blocking critical sections. 0N/A// This class must use no vm facilities that require initialization. 0N/A// It is used very early in the vm's initialization, in allocation 0N/A// code and other areas. ThreadCritical regions are reentrant. 0N/A// Due to race conditions during vm exit, some of the os level 0N/A// synchronization primitives may not be deallocated at exit. It 502N/A// is a good plan to implement the platform dependent sections of 502N/A// code with resources that are recoverable during process 0N/A// cleanup by the os. Calling the initialize method before use 0N/A// is also problematic, it is best to use preinitialized primitives 0N/A// if possible. As an example: 0N/A// mutex_t mp = DEFAULTMUTEX; 4632N/A// Also note that this class is declared as a StackObj to enforce 4632N/A// block structured short locks. It cannot be declared a ResourceObj 4632N/A// or CHeapObj, due to initialization issues. 0N/A#
endif // SHARE_VM_RUNTIME_THREADCRITICAL_HPP