1 // 2 // Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved. 3 // DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 // 5 // This code is free software; you can redistribute it and/or modify it 6 // under the terms of the GNU General Public License version 2 only, as 7 // published by the Free Software Foundation. 8 // 9 // This code is distributed in the hope that it will be useful, but WITHOUT 10 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 // version 2 for more details (a copy is included in the LICENSE file that 13 // accompanied this code). 14 // 15 // You should have received a copy of the GNU General Public License version 16 // 2 along with this work; if not, write to the Free Software Foundation, 17 // Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 // 19 // Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 // or visit www.oracle.com if you need additional information or have any 21 // questions. 22 // 23 24 25 #include "precompiled.hpp" 26 #include "compiler/abstractCompiler.hpp" 27 #include "compiler/compileBroker.hpp" 28 #include "runtime/mutexLocker.hpp" 29 30 bool AbstractCompiler::should_perform_init() { 31 if (_compiler_state != initialized) { 32 MutexLocker only_one(CompileThread_lock); 33 34 if (_compiler_state == uninitialized) { 35 _compiler_state = initializing; 36 return true; 37 } else { 38 while (_compiler_state == initializing) { 39 CompileThread_lock->wait(); 40 } 41 } 42 } 43 return false; 44 } 45 46 bool AbstractCompiler::should_perform_shutdown() { 47 // Since this method can be called by multiple threads, the lock ensures atomicity of 48 // decrementing '_num_compiler_threads' and the following operations. 49 MutexLocker only_one(CompileThread_lock); 50 _num_compiler_threads--; 51 assert (CompileBroker::is_compilation_disabled_forever(), "Must be set, otherwise thread waits forever"); 52 53 // Only the last thread will perform shutdown operations 54 if (_num_compiler_threads == 0) { 55 return true; 56 } 57 return false; 58 } 59 60 void AbstractCompiler::set_state(int state) { 61 // Ensure that state is only set by one thread at a time 62 MutexLocker only_one(CompileThread_lock); 63 _compiler_state = state; 64 CompileThread_lock->notify_all(); 65 }