/*
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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 _LIBBACKTRACE_THREAD_ENTRY_H
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#define _LIBBACKTRACE_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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class ThreadEntry {
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public:
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static ThreadEntry* Get(pid_t pid, 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(int);
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void CopyUcontextFromSigcontext(void*);
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inline void Lock() {
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pthread_mutex_lock(&mutex_);
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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() {
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pthread_mutex_unlock(&mutex_);
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}
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inline ucontext_t* GetUcontext() { return &ucontext_; }
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private:
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ThreadEntry(pid_t pid, pid_t tid);
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~ThreadEntry();
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bool Match(pid_t chk_pid, pid_t chk_tid) { return (chk_pid == pid_ && chk_tid == tid_); }
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pid_t pid_;
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pid_t tid_;
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int ref_count_;
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pthread_mutex_t mutex_;
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pthread_mutex_t wait_mutex_;
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pthread_cond_t wait_cond_;
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int wait_value_;
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ThreadEntry* next_;
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ThreadEntry* prev_;
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ucontext_t ucontext_;
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static ThreadEntry* list_;
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static pthread_mutex_t list_mutex_;
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};
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#endif // _LIBBACKTRACE_THREAD_ENTRY_H
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