79 lines
1.8 KiB
C
79 lines
1.8 KiB
C
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/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _LIBUNWINDSTACK_THREAD_ENTRY_H
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#define _LIBUNWINDSTACK_THREAD_ENTRY_H
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#include <pthread.h>
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#include <sys/types.h>
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#include <ucontext.h>
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#include <condition_variable>
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#include <map>
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#include <mutex>
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namespace unwindstack {
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enum WaitType : int {
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WAIT_FOR_UCONTEXT = 1,
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WAIT_FOR_UNWIND_TO_COMPLETE,
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WAIT_FOR_THREAD_TO_RESTART,
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};
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class ThreadEntry {
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public:
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static ThreadEntry* Get(pid_t tid, bool create = true);
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static void Remove(ThreadEntry* entry);
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void Wake();
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bool Wait(WaitType type);
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void CopyUcontextFromSigcontext(void* sigcontext);
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inline void Lock() {
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mutex_.lock();
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// Always reset the wait value since this could be the first or nth
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// time this entry is locked.
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wait_value_ = 0;
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}
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inline void Unlock() { mutex_.unlock(); }
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inline ucontext_t* GetUcontext() { return &ucontext_; }
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private:
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ThreadEntry(pid_t tid);
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~ThreadEntry();
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pid_t tid_;
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int ref_count_;
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std::mutex mutex_;
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std::mutex wait_mutex_;
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std::condition_variable wait_cond_;
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int wait_value_;
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ucontext_t ucontext_;
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static std::mutex entries_mutex_;
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static std::map<pid_t, ThreadEntry*> entries_;
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};
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} // namespace unwindstack
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#endif // _LIBUNWINDSTACK_THREAD_ENTRY_H
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