Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 4 | |
| 5 | #ifndef V8_V8THREADS_H_ |
| 6 | #define V8_V8THREADS_H_ |
| 7 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 8 | #include "src/isolate.h" |
| 9 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 10 | namespace v8 { |
| 11 | namespace internal { |
| 12 | |
| 13 | |
| 14 | class ThreadState { |
| 15 | public: |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 16 | // Returns NULL after the last one. |
| 17 | ThreadState* Next(); |
| 18 | |
| 19 | enum List {FREE_LIST, IN_USE_LIST}; |
| 20 | |
| 21 | void LinkInto(List list); |
| 22 | void Unlink(); |
| 23 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 24 | // Id of thread. |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 25 | void set_id(ThreadId id) { id_ = id; } |
| 26 | ThreadId id() { return id_; } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 27 | |
| 28 | // Should the thread be terminated when it is restored? |
| 29 | bool terminate_on_restore() { return terminate_on_restore_; } |
| 30 | void set_terminate_on_restore(bool terminate_on_restore) { |
| 31 | terminate_on_restore_ = terminate_on_restore; |
| 32 | } |
| 33 | |
| 34 | // Get data area for archiving a thread. |
| 35 | char* data() { return data_; } |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 36 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 37 | private: |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 38 | explicit ThreadState(ThreadManager* thread_manager); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 39 | ~ThreadState(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 40 | |
| 41 | void AllocateSpace(); |
| 42 | |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 43 | ThreadId id_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 44 | bool terminate_on_restore_; |
| 45 | char* data_; |
| 46 | ThreadState* next_; |
| 47 | ThreadState* previous_; |
| 48 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 49 | ThreadManager* thread_manager_; |
| 50 | |
| 51 | friend class ThreadManager; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 52 | }; |
| 53 | |
| 54 | |
Ben Murdoch | 692be65 | 2012-01-10 18:47:50 +0000 | [diff] [blame] | 55 | // Defined in isolate.h. |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 56 | class ThreadLocalTop; |
| 57 | |
| 58 | |
| 59 | class ThreadVisitor { |
| 60 | public: |
| 61 | // ThreadLocalTop may be only available during this call. |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 62 | virtual void VisitThread(Isolate* isolate, ThreadLocalTop* top) = 0; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 63 | |
| 64 | protected: |
| 65 | virtual ~ThreadVisitor() {} |
| 66 | }; |
| 67 | |
| 68 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 69 | class ThreadManager { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 70 | public: |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 71 | void Lock(); |
| 72 | void Unlock(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 73 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 74 | void ArchiveThread(); |
| 75 | bool RestoreThread(); |
| 76 | void FreeThreadResources(); |
| 77 | bool IsArchived(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 78 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 79 | void Iterate(ObjectVisitor* v); |
| 80 | void IterateArchivedThreads(ThreadVisitor* v); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 81 | bool IsLockedByCurrentThread() { |
| 82 | return mutex_owner_.Equals(ThreadId::Current()); |
| 83 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 84 | |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 85 | ThreadId CurrentId(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 86 | |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 87 | void TerminateExecution(ThreadId thread_id); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 88 | |
| 89 | // Iterate over in-use states. |
| 90 | ThreadState* FirstThreadStateInUse(); |
| 91 | ThreadState* GetFreeThreadState(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 92 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 93 | private: |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 94 | ThreadManager(); |
| 95 | ~ThreadManager(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 96 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 97 | void DeleteThreadStateList(ThreadState* anchor); |
| 98 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 99 | void EagerlyArchiveThread(); |
| 100 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 101 | base::Mutex mutex_; |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 102 | ThreadId mutex_owner_; |
| 103 | ThreadId lazily_archived_thread_; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 104 | ThreadState* lazily_archived_thread_state_; |
| 105 | |
| 106 | // In the following two lists there is always at least one object on the list. |
| 107 | // The first object is a flying anchor that is only there to simplify linking |
| 108 | // and unlinking. |
| 109 | // Head of linked list of free states. |
| 110 | ThreadState* free_anchor_; |
| 111 | // Head of linked list of states in use. |
| 112 | ThreadState* in_use_anchor_; |
| 113 | |
| 114 | Isolate* isolate_; |
| 115 | |
| 116 | friend class Isolate; |
| 117 | friend class ThreadState; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 118 | }; |
| 119 | |
| 120 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 121 | } // namespace internal |
| 122 | } // namespace v8 |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 123 | |
| 124 | #endif // V8_V8THREADS_H_ |