143 lines
2.6 KiB
C
143 lines
2.6 KiB
C
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
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/*
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Rubber Band
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An audio time-stretching and pitch-shifting library.
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Copyright 2007-2008 Chris Cannam.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version. See the file
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COPYING included with this distribution for more information.
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*/
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#ifndef _RUBBERBAND_THREAD_H_
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#define _RUBBERBAND_THREAD_H_
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#ifdef _WIN32
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#include <windows.h>
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#else /* !_WIN32 */
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#include <pthread.h>
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#endif /* !_WIN32 */
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#include <string>
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//#define DEBUG_THREAD 1
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//#define DEBUG_MUTEX 1
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//#define DEBUG_CONDITION 1
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namespace RubberBand
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{
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class Thread
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{
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public:
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#ifdef _WIN32
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typedef HANDLE Id;
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#else
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typedef pthread_t Id;
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#endif
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Thread();
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virtual ~Thread();
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Id id();
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void start();
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void wait();
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static bool threadingAvailable();
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protected:
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virtual void run() = 0;
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private:
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#ifdef _WIN32
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HANDLE m_id;
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bool m_extant;
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static DWORD WINAPI staticRun(LPVOID lpParam);
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#else
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pthread_t m_id;
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bool m_extant;
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static void *staticRun(void *);
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#endif
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};
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class Mutex
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{
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public:
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Mutex();
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~Mutex();
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void lock();
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void unlock();
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bool trylock();
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private:
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#ifdef _WIN32
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HANDLE m_mutex;
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#ifndef NO_THREAD_CHECKS
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DWORD m_lockedBy;
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#endif
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#else
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pthread_mutex_t m_mutex;
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#ifndef NO_THREAD_CHECKS
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pthread_t m_lockedBy;
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bool m_locked;
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#endif
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#endif
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};
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class MutexLocker
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{
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public:
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MutexLocker(Mutex *);
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~MutexLocker();
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private:
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Mutex *m_mutex;
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};
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class Condition
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{
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public:
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Condition(std::string name);
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~Condition();
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// To wait on a condition, either simply call wait(), or call
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// lock() and then wait() (perhaps testing some state in between).
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// To signal a condition, call signal().
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// Although any thread may signal on a given condition, only one
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// thread should ever wait on any given condition object --
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// otherwise there will be a race conditions in the logic that
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// avoids the thread code having to track whether the condition's
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// mutex is locked or not. If that is your requirement, this
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// Condition wrapper is not for you.
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void lock();
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void unlock();
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void wait(int us = 0);
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void signal();
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private:
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#ifdef _WIN32
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HANDLE m_mutex;
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HANDLE m_condition;
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bool m_locked;
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#else
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pthread_mutex_t m_mutex;
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pthread_cond_t m_condition;
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bool m_locked;
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#endif
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#ifdef DEBUG_CONDITION
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std::string m_name;
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#endif
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};
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}
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#endif
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