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1 // Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #include "vm/os_thread.h" | 5 #include "vm/os_thread.h" |
6 | 6 |
7 #include "vm/atomic.h" | 7 #include "vm/atomic.h" |
8 #include "vm/lockers.h" | 8 #include "vm/lockers.h" |
9 #include "vm/log.h" | 9 #include "vm/log.h" |
10 #include "vm/thread_interrupter.h" | 10 #include "vm/thread_interrupter.h" |
11 #include "vm/timeline.h" | 11 #include "vm/timeline.h" |
12 | 12 |
13 namespace dart { | 13 namespace dart { |
14 | 14 |
15 // The single thread local key which stores all the thread local data | 15 // The single thread local key which stores all the thread local data |
16 // for a thread. | 16 // for a thread. |
17 ThreadLocalKey OSThread::thread_key_ = kUnsetThreadLocalKey; | 17 ThreadLocalKey OSThread::thread_key_ = kUnsetThreadLocalKey; |
18 OSThread* OSThread::thread_list_head_ = NULL; | 18 OSThread* OSThread::thread_list_head_ = NULL; |
19 Mutex* OSThread::thread_list_lock_ = NULL; | 19 Mutex* OSThread::thread_list_lock_ = NULL; |
20 bool OSThread::creation_enabled_ = false; | 20 bool OSThread::creation_enabled_ = false; |
21 | 21 |
22 | 22 |
23 OSThread::OSThread() : | 23 OSThread::OSThread() |
24 BaseThread(true), | 24 : BaseThread(true), |
25 id_(OSThread::GetCurrentThreadId()), | 25 id_(OSThread::GetCurrentThreadId()), |
26 #if defined(DEBUG) | 26 #if defined(DEBUG) |
27 join_id_(kInvalidThreadJoinId), | 27 join_id_(kInvalidThreadJoinId), |
28 #endif | 28 #endif |
29 #ifndef PRODUCT | 29 #ifndef PRODUCT |
30 trace_id_(OSThread::GetCurrentThreadTraceId()), | 30 trace_id_(OSThread::GetCurrentThreadTraceId()), |
31 #endif | 31 #endif |
32 name_(NULL), | 32 name_(NULL), |
33 timeline_block_lock_(new Mutex()), | 33 timeline_block_lock_(new Mutex()), |
34 timeline_block_(NULL), | 34 timeline_block_(NULL), |
35 thread_list_next_(NULL), | 35 thread_list_next_(NULL), |
36 thread_interrupt_disabled_(1), // Thread interrupts disabled by default. | 36 thread_interrupt_disabled_(1), // Thread interrupts disabled by default. |
37 log_(new class Log()), | 37 log_(new class Log()), |
38 stack_base_(0), | 38 stack_base_(0), |
39 thread_(NULL) { | 39 thread_(NULL) { |
40 } | 40 } |
41 | 41 |
42 | 42 |
43 OSThread* OSThread::CreateOSThread() { | 43 OSThread* OSThread::CreateOSThread() { |
44 ASSERT(thread_list_lock_ != NULL); | 44 ASSERT(thread_list_lock_ != NULL); |
45 MutexLocker ml(thread_list_lock_); | 45 MutexLocker ml(thread_list_lock_); |
46 if (!creation_enabled_) { | 46 if (!creation_enabled_) { |
47 return NULL; | 47 return NULL; |
48 } | 48 } |
49 OSThread* os_thread = new OSThread(); | 49 OSThread* os_thread = new OSThread(); |
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60 if (Timeline::recorder() != NULL) { | 60 if (Timeline::recorder() != NULL) { |
61 Timeline::recorder()->FinishBlock(timeline_block_); | 61 Timeline::recorder()->FinishBlock(timeline_block_); |
62 } | 62 } |
63 } | 63 } |
64 timeline_block_ = NULL; | 64 timeline_block_ = NULL; |
65 delete timeline_block_lock_; | 65 delete timeline_block_lock_; |
66 free(name_); | 66 free(name_); |
67 } | 67 } |
68 | 68 |
69 | 69 |
70 | |
71 void OSThread::SetName(const char* name) { | 70 void OSThread::SetName(const char* name) { |
72 MutexLocker ml(thread_list_lock_); | 71 MutexLocker ml(thread_list_lock_); |
73 // Clear the old thread name. | 72 // Clear the old thread name. |
74 if (name_ != NULL) { | 73 if (name_ != NULL) { |
75 free(name_); | 74 free(name_); |
76 name_ = NULL; | 75 name_ = NULL; |
77 } | 76 } |
78 set_name(name); | 77 set_name(name); |
79 } | 78 } |
80 | 79 |
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128 | 127 |
129 // Create a new OSThread strcture and set it as the TLS. | 128 // Create a new OSThread strcture and set it as the TLS. |
130 OSThread* os_thread = CreateOSThread(); | 129 OSThread* os_thread = CreateOSThread(); |
131 ASSERT(os_thread != NULL); | 130 ASSERT(os_thread != NULL); |
132 OSThread::SetCurrent(os_thread); | 131 OSThread::SetCurrent(os_thread); |
133 os_thread->set_name("Dart_Initialize"); | 132 os_thread->set_name("Dart_Initialize"); |
134 } | 133 } |
135 | 134 |
136 | 135 |
137 void OSThread::Cleanup() { | 136 void OSThread::Cleanup() { |
138 // We cannot delete the thread local key and thread list lock, yet. | 137 // We cannot delete the thread local key and thread list lock, yet. |
139 // See the note on thread_list_lock_ in os_thread.h. | 138 // See the note on thread_list_lock_ in os_thread.h. |
140 #if 0 | 139 #if 0 |
141 if (thread_list_lock_ != NULL) { | 140 if (thread_list_lock_ != NULL) { |
142 // Delete the thread local key. | 141 // Delete the thread local key. |
143 ASSERT(thread_key_ != kUnsetThreadLocalKey); | 142 ASSERT(thread_key_ != kUnsetThreadLocalKey); |
144 DeleteThreadLocal(thread_key_); | 143 DeleteThreadLocal(thread_key_); |
145 thread_key_ = kUnsetThreadLocalKey; | 144 thread_key_ = kUnsetThreadLocalKey; |
146 | 145 |
147 // Delete the global OSThread lock. | 146 // Delete the global OSThread lock. |
148 ASSERT(thread_list_lock_ != NULL); | 147 ASSERT(thread_list_lock_ != NULL); |
149 delete thread_list_lock_; | 148 delete thread_list_lock_; |
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236 // Scan across list and remove |thread|. | 235 // Scan across list and remove |thread|. |
237 while (current != NULL) { | 236 while (current != NULL) { |
238 if (current == thread) { | 237 if (current == thread) { |
239 // We found |thread|, remove from list. | 238 // We found |thread|, remove from list. |
240 if (previous == NULL) { | 239 if (previous == NULL) { |
241 thread_list_head_ = thread->thread_list_next_; | 240 thread_list_head_ = thread->thread_list_next_; |
242 } else { | 241 } else { |
243 previous->thread_list_next_ = current->thread_list_next_; | 242 previous->thread_list_next_ = current->thread_list_next_; |
244 } | 243 } |
245 thread->thread_list_next_ = NULL; | 244 thread->thread_list_next_ = NULL; |
246 final_thread = !creation_enabled_ && (thread_list_head_ == NULL); | 245 final_thread = !creation_enabled_ && (thread_list_head_ == NULL); |
247 break; | 246 break; |
248 } | 247 } |
249 previous = current; | 248 previous = current; |
250 current = current->thread_list_next_; | 249 current = current->thread_list_next_; |
251 } | 250 } |
252 } | 251 } |
253 // Check if this is the last thread. The last thread does a cleanup | 252 // Check if this is the last thread. The last thread does a cleanup |
254 // which removes the thread local key and the associated mutex. | 253 // which removes the thread local key and the associated mutex. |
255 if (final_thread) { | 254 if (final_thread) { |
256 Cleanup(); | 255 Cleanup(); |
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287 | 286 |
288 OSThread* OSThreadIterator::Next() { | 287 OSThread* OSThreadIterator::Next() { |
289 ASSERT(OSThread::thread_list_lock_ != NULL); | 288 ASSERT(OSThread::thread_list_lock_ != NULL); |
290 ASSERT(OSThread::thread_list_lock_->IsOwnedByCurrentThread()); | 289 ASSERT(OSThread::thread_list_lock_->IsOwnedByCurrentThread()); |
291 OSThread* current = next_; | 290 OSThread* current = next_; |
292 next_ = next_->thread_list_next_; | 291 next_ = next_->thread_list_next_; |
293 return current; | 292 return current; |
294 } | 293 } |
295 | 294 |
296 } // namespace dart | 295 } // namespace dart |
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