Mercurial > hg > truffle
view src/share/vm/runtime/threadCritical.hpp @ 18394:973c6551dfd8
Add TrustedInterface to list of classes for tests
author | Gilles Duboscq <duboscq@ssw.jku.at> |
---|---|
date | Mon, 22 Sep 2014 10:27:52 +0200 |
parents | f95d63e2154a |
children |
line wrap: on
line source
/* * Copyright (c) 2001, 2010, 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. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_RUNTIME_THREADCRITICAL_HPP #define SHARE_VM_RUNTIME_THREADCRITICAL_HPP #include "memory/allocation.hpp" // ThreadCritical is used to protect short non-blocking critical sections. // This class must use no vm facilities that require initialization. // It is used very early in the vm's initialization, in allocation // code and other areas. ThreadCritical regions are reentrant. // // Due to race conditions during vm exit, some of the os level // synchronization primitives may not be deallocated at exit. It // is a good plan to implement the platform dependent sections of // code with resources that are recoverable during process // cleanup by the os. Calling the initialize method before use // is also problematic, it is best to use preinitialized primitives // if possible. As an example: // // mutex_t mp = DEFAULTMUTEX; // // Also note that this class is declared as a StackObj to enforce // block structured short locks. It cannot be declared a ResourceObj // or CHeapObj, due to initialization issues. class ThreadCritical : public StackObj { friend class os; private: static void initialize(); static void release(); public: ThreadCritical(); ~ThreadCritical(); }; #endif // SHARE_VM_RUNTIME_THREADCRITICAL_HPP