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121 lines
3.7 KiB
C++
121 lines
3.7 KiB
C++
/* -*- mode: c++; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: t -*-
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* vim: ts=4 sw=4 noet ai cindent syntax=cpp
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*
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* timed_thread.h: Abstraction layer for timed threads
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*
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* Copyright (C) 2006-2007 Philip Kovacs pkovacs@users.sourceforge.net
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* Copyright (c) 2005-2010 Brenden Matthews, et. al. (see AUTHORS)
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* All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
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* USA. */
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#ifndef _TIMED_THREAD_H_
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#define _TIMED_THREAD_H_
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#include <stdlib.h>
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#include <functional>
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#include <memory>
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/* 10000 microseconds = 10 ms = 0.01 sec */
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const unsigned int MINIMUM_INTERVAL_USECS = 10000;
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/* private data */
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typedef struct _timed_thread _timed_thread;
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class timed_thread;
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typedef std::shared_ptr<timed_thread> timed_thread_ptr;
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namespace std { class mutex; }
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class thread_handle {
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/* this class is passed to threaded functions allowing them to control
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* specific thread aspects */
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public:
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virtual ~thread_handle() {}
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int test(int override_wait_time);
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std::mutex &mutex();
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void lock(void);
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void unlock(void);
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int readfd(void) const;
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private:
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thread_handle(timed_thread *thread) : thread(thread) {}
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friend class timed_thread;
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timed_thread *thread;
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};
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class timed_thread {
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public:
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/* create a timed thread (object creation only) */
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static timed_thread_ptr create(const std::function<void(thread_handle &)> start_routine, const unsigned int
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interval_usecs, bool register_for_destruction = true) {
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timed_thread_ptr ptr(new timed_thread(std::cref(start_routine), interval_usecs));
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if (register_for_destruction) {
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register_(ptr);
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}
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return ptr;
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}
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virtual ~timed_thread(void) {
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destroy();
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}
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/* run a timed thread (drop the thread and run it) */
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int run(void);
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/* lock a timed thread for critical section activity */
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void lock(void);
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/* unlock a timed thread after critical section activity */
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void unlock(void);
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/* returns the critical section mutex */
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std::mutex &mutex();
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/* destroy all registered timed threads */
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static void destroy_registered_threads(void);
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/* returns read file descriptor for thread pipe */
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int readfd(void) const;
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private:
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/* create a timed thread (object creation only) */
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timed_thread(const std::function<void(thread_handle &)> start_routine, unsigned int
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interval_usecs);
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/* waits required interval (unless override_wait_time is non-zero) for
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* termination signal returns 1 if received, 0 otherwise. should also return 1
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* if the thread has been asked kindly to die. */
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int test(int override_wait_time);
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/* destroy a timed thread */
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void destroy(bool deregister_this = true);
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/* register a timed thread for destruction */
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static int register_(const timed_thread_ptr &timed_thread);
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/* de-register a timed thread for destruction */
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static void deregister(const timed_thread *timed_thread);
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/* private internal data */
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std::auto_ptr<_timed_thread> p_timed_thread;
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thread_handle p_thread_handle;
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unsigned int interval_usecs;
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bool running;
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friend class thread_handle;
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};
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#endif /* #ifdef _TIMED_THREAD_H_ */
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