| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "thread_list.h" |
| |
| namespace art { |
| |
| ThreadList::ThreadList() : lock_("ThreadList lock") { |
| } |
| |
| ThreadList::~ThreadList() { |
| if (Contains(Thread::Current())) { |
| Runtime::Current()->DetachCurrentThread(); |
| } |
| |
| // All threads should have exited and unregistered when we |
| // reach this point. This means that all daemon threads had been |
| // shutdown cleanly. |
| // TODO: dump ThreadList if non-empty. |
| CHECK_EQ(list_.size(), 0U); |
| } |
| |
| bool ThreadList::Contains(Thread* thread) { |
| return find(list_.begin(), list_.end(), thread) != list_.end(); |
| } |
| |
| void ThreadList::Dump(std::ostream& os) { |
| MutexLock mu(lock_); |
| os << "DALVIK THREADS (" << list_.size() << "):\n"; |
| typedef std::list<Thread*>::const_iterator It; // TODO: C++0x auto |
| for (It it = list_.begin(), end = list_.end(); it != end; ++it) { |
| (*it)->Dump(os); |
| os << "\n"; |
| } |
| } |
| |
| void ThreadList::Register(Thread* thread) { |
| //LOG(INFO) << "ThreadList::Register() " << *thread; |
| MutexLock mu(lock_); |
| CHECK(!Contains(thread)); |
| list_.push_back(thread); |
| } |
| |
| void ThreadList::Unregister() { |
| Thread* self = Thread::Current(); |
| |
| //LOG(INFO) << "ThreadList::Unregister() " << self; |
| MutexLock mu(lock_); |
| |
| // Remove this thread from the list. |
| CHECK(Contains(self)); |
| list_.remove(self); |
| |
| // Delete the Thread* and release the thin lock id. |
| uint32_t thin_lock_id = self->thin_lock_id_; |
| delete self; |
| ReleaseThreadId(thin_lock_id); |
| |
| // Clear the TLS data, so that thread is recognizably detached. |
| // (It may wish to reattach later.) |
| errno = pthread_setspecific(Thread::pthread_key_self_, NULL); |
| if (errno != 0) { |
| PLOG(FATAL) << "pthread_setspecific failed"; |
| } |
| } |
| |
| void ThreadList::VisitRoots(Heap::RootVisitor* visitor, void* arg) const { |
| MutexLock mu(lock_); |
| typedef std::list<Thread*>::const_iterator It; // TODO: C++0x auto |
| for (It it = list_.begin(), end = list_.end(); it != end; ++it) { |
| (*it)->VisitRoots(visitor, arg); |
| } |
| } |
| |
| uint32_t ThreadList::AllocThreadId() { |
| MutexLock mu(lock_); |
| for (size_t i = 0; i < allocated_ids_.size(); ++i) { |
| if (!allocated_ids_[i]) { |
| allocated_ids_.set(i); |
| return i + 1; // Zero is reserved to mean "invalid". |
| } |
| } |
| LOG(FATAL) << "Out of internal thread ids"; |
| return 0; |
| } |
| |
| void ThreadList::ReleaseThreadId(uint32_t id) { |
| lock_.AssertHeld(); |
| --id; // Zero is reserved to mean "invalid". |
| DCHECK(allocated_ids_[id]) << id; |
| allocated_ids_.reset(id); |
| } |
| |
| } // namespace art |