1//
2// Copyright (c) 2007, 2019, 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#include "precompiled.hpp"
25#include "compiler/abstractCompiler.hpp"
26#include "compiler/compileBroker.hpp"
27#include "runtime/mutexLocker.hpp"
28
29bool AbstractCompiler::should_perform_init() {
30 if (_compiler_state != initialized) {
31 MonitorLocker only_one(CompileThread_lock);
32
33 if (_compiler_state == uninitialized) {
34 _compiler_state = initializing;
35 return true;
36 } else {
37 while (_compiler_state == initializing) {
38 only_one.wait();
39 }
40 }
41 }
42 return false;
43}
44
45bool AbstractCompiler::should_perform_shutdown() {
46 // Since this method can be called by multiple threads, the lock ensures atomicity of
47 // decrementing '_num_compiler_threads' and the following operations.
48 MutexLocker only_one(CompileThread_lock);
49 _num_compiler_threads--;
50 assert (CompileBroker::is_compilation_disabled_forever(), "Must be set, otherwise thread waits forever");
51
52 // Only the last thread will perform shutdown operations
53 if (_num_compiler_threads == 0) {
54 return true;
55 }
56 return false;
57}
58
59void AbstractCompiler::set_state(int state) {
60 // Ensure that state is only set by one thread at a time
61 MutexLocker only_one(CompileThread_lock);
62 _compiler_state = state;
63 CompileThread_lock->notify_all();
64}
65