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