ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 1 | // Copyright 2008 the V8 project authors. All rights reserved. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #ifndef V8_V8THREADS_H_ |
| 29 | #define V8_V8THREADS_H_ |
| 30 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 31 | namespace v8 { |
| 32 | namespace internal { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 33 | |
| 34 | |
| 35 | class ThreadState { |
| 36 | public: |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 37 | // Returns NULL after the last one. |
| 38 | ThreadState* Next(); |
| 39 | |
| 40 | enum List {FREE_LIST, IN_USE_LIST}; |
| 41 | |
| 42 | void LinkInto(List list); |
| 43 | void Unlink(); |
| 44 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 45 | // Id of thread. |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 46 | void set_id(ThreadId id) { id_ = id; } |
| 47 | ThreadId id() { return id_; } |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 48 | |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 49 | // Should the thread be terminated when it is restored? |
| 50 | bool terminate_on_restore() { return terminate_on_restore_; } |
| 51 | void set_terminate_on_restore(bool terminate_on_restore) { |
| 52 | terminate_on_restore_ = terminate_on_restore; |
| 53 | } |
| 54 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 55 | // Get data area for archiving a thread. |
| 56 | char* data() { return data_; } |
| 57 | private: |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 58 | explicit ThreadState(ThreadManager* thread_manager); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 59 | |
| 60 | void AllocateSpace(); |
| 61 | |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 62 | ThreadId id_; |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 63 | bool terminate_on_restore_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 64 | char* data_; |
| 65 | ThreadState* next_; |
| 66 | ThreadState* previous_; |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 67 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 68 | ThreadManager* thread_manager_; |
| 69 | |
| 70 | friend class ThreadManager; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 71 | }; |
| 72 | |
| 73 | |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 74 | // Defined in top.h |
| 75 | class ThreadLocalTop; |
| 76 | |
| 77 | |
| 78 | class ThreadVisitor { |
| 79 | public: |
| 80 | // ThreadLocalTop may be only available during this call. |
vegorov@chromium.org | 74f333b | 2011-04-06 11:17:46 +0000 | [diff] [blame] | 81 | virtual void VisitThread(Isolate* isolate, ThreadLocalTop* top) = 0; |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 82 | |
| 83 | protected: |
| 84 | virtual ~ThreadVisitor() {} |
| 85 | }; |
| 86 | |
| 87 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 88 | class ThreadManager { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 89 | public: |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 90 | void Lock(); |
| 91 | void Unlock(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 92 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 93 | void ArchiveThread(); |
| 94 | bool RestoreThread(); |
| 95 | void FreeThreadResources(); |
| 96 | bool IsArchived(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 97 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 98 | void Iterate(ObjectVisitor* v); |
| 99 | void IterateArchivedThreads(ThreadVisitor* v); |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 100 | bool IsLockedByCurrentThread() { |
| 101 | return mutex_owner_.Equals(ThreadId::Current()); |
| 102 | } |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 103 | |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 104 | ThreadId CurrentId(); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 105 | |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 106 | void TerminateExecution(ThreadId thread_id); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 107 | |
| 108 | // Iterate over in-use states. |
| 109 | ThreadState* FirstThreadStateInUse(); |
| 110 | ThreadState* GetFreeThreadState(); |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 111 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 112 | private: |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 113 | ThreadManager(); |
| 114 | ~ThreadManager(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 115 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 116 | void EagerlyArchiveThread(); |
| 117 | |
| 118 | Mutex* mutex_; |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 119 | ThreadId mutex_owner_; |
| 120 | ThreadId lazily_archived_thread_; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 121 | ThreadState* lazily_archived_thread_state_; |
| 122 | |
| 123 | // In the following two lists there is always at least one object on the list. |
| 124 | // The first object is a flying anchor that is only there to simplify linking |
| 125 | // and unlinking. |
| 126 | // Head of linked list of free states. |
| 127 | ThreadState* free_anchor_; |
| 128 | // Head of linked list of states in use. |
| 129 | ThreadState* in_use_anchor_; |
| 130 | |
| 131 | Isolate* isolate_; |
| 132 | |
| 133 | friend class Isolate; |
| 134 | friend class ThreadState; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 135 | }; |
| 136 | |
| 137 | |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 138 | // The ContextSwitcher thread is used to schedule regular preemptions to |
| 139 | // multiple running V8 threads. Generally it is necessary to call |
| 140 | // StartPreemption if there is more than one thread running. If not, a single |
| 141 | // JavaScript can take full control of V8 and not allow other threads to run. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 142 | class ContextSwitcher: public Thread { |
| 143 | public: |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 144 | // Set the preemption interval for the ContextSwitcher thread. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 145 | static void StartPreemption(int every_n_ms); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 146 | |
| 147 | // Stop sending preemption requests to threads. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 148 | static void StopPreemption(); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 149 | |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 150 | // Preempted thread needs to call back to the ContextSwitcher to acknowledge |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 151 | // the handling of a preemption request. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 152 | static void PreemptionReceived(); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 153 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 154 | private: |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 155 | ContextSwitcher(Isolate* isolate, int every_n_ms); |
| 156 | |
| 157 | Isolate* isolate() const { return isolate_; } |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 158 | |
| 159 | void Run(); |
| 160 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 161 | bool keep_going_; |
| 162 | int sleep_ms_; |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 163 | Isolate* isolate_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 164 | }; |
| 165 | |
| 166 | } } // namespace v8::internal |
| 167 | |
| 168 | #endif // V8_V8THREADS_H_ |