150 lines
2.7 KiB
C
150 lines
2.7 KiB
C
|
/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
|
||
|
|
|
||
|
|
/*
|
||
|
|
QM DSP Library
|
||
|
|
|
||
|
|
Centre for Digital Music, Queen Mary, University of London.
|
||
|
|
This file copyright Chris Cannam, used with permission.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _THREAD_H_
|
||
|
|
#define _THREAD_H_
|
||
|
|
|
||
|
|
#ifdef _WIN32
|
||
|
|
#include <windows.h>
|
||
|
|
#else /* !_WIN32 */
|
||
|
|
#ifdef USE_PTHREADS
|
||
|
|
#include <pthread.h>
|
||
|
|
#endif /* USE_PTHREADS */
|
||
|
|
#endif /* !_WIN32 */
|
||
|
|
|
||
|
|
#include <string>
|
||
|
|
|
||
|
|
//#define DEBUG_THREAD 1
|
||
|
|
//#define DEBUG_MUTEX 1
|
||
|
|
//#define DEBUG_CONDITION 1
|
||
|
|
|
||
|
|
class Thread
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
#ifdef _WIN32
|
||
|
|
typedef HANDLE Id;
|
||
|
|
#else
|
||
|
|
#ifdef USE_PTHREADS
|
||
|
|
typedef pthread_t Id;
|
||
|
|
#endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
Thread();
|
||
|
|
virtual ~Thread();
|
||
|
|
|
||
|
|
Id id();
|
||
|
|
|
||
|
|
void start();
|
||
|
|
void wait();
|
||
|
|
|
||
|
|
static bool threadingAvailable();
|
||
|
|
|
||
|
|
protected:
|
||
|
|
virtual void run() = 0;
|
||
|
|
|
||
|
|
private:
|
||
|
|
#ifdef _WIN32
|
||
|
|
HANDLE m_id;
|
||
|
|
bool m_extant;
|
||
|
|
static DWORD WINAPI staticRun(LPVOID lpParam);
|
||
|
|
#else
|
||
|
|
#ifdef USE_PTHREADS
|
||
|
|
pthread_t m_id;
|
||
|
|
bool m_extant;
|
||
|
|
static void *staticRun(void *);
|
||
|
|
#endif
|
||
|
|
#endif
|
||
|
|
};
|
||
|
|
|
||
|
|
class Mutex
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
Mutex();
|
||
|
|
~Mutex();
|
||
|
|
|
||
|
|
void lock();
|
||
|
|
void unlock();
|
||
|
|
bool trylock();
|
||
|
|
|
||
|
|
private:
|
||
|
|
#ifdef _WIN32
|
||
|
|
HANDLE m_mutex;
|
||
|
|
#ifndef NO_THREAD_CHECKS
|
||
|
|
DWORD m_lockedBy;
|
||
|
|
#endif
|
||
|
|
#else
|
||
|
|
#ifdef USE_PTHREADS
|
||
|
|
pthread_mutex_t m_mutex;
|
||
|
|
#ifndef NO_THREAD_CHECKS
|
||
|
|
pthread_t m_lockedBy;
|
||
|
|
bool m_locked;
|
||
|
|
#endif
|
||
|
|
#endif
|
||
|
|
#endif
|
||
|
|
};
|
||
|
|
|
||
|
|
class MutexLocker
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
MutexLocker(Mutex *);
|
||
|
|
~MutexLocker();
|
||
|
|
|
||
|
|
private:
|
||
|
|
Mutex *m_mutex;
|
||
|
|
};
|
||
|
|
|
||
|
|
class Condition
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
Condition(std::string name);
|
||
|
|
~Condition();
|
||
|
|
|
||
|
|
// Condition bundles a pthread-style condition variable and mutex
|
||
|
|
// into one class.
|
||
|
|
|
||
|
|
// To wait on a condition, call lock(), test termination variables
|
||
|
|
// as appropriate, and then wait(). The condition will be
|
||
|
|
// unlocked for the duration of the wait() call, which will end
|
||
|
|
// when the condition is signalled. The condition will be locked
|
||
|
|
// again when wait() returns.
|
||
|
|
//
|
||
|
|
// To signal a condition, call signal(). If the waiting thread
|
||
|
|
// will be performing tests between its own lock() and wait(),
|
||
|
|
// then the signalling thread should also lock() before it signals
|
||
|
|
// (and then unlock afterwards). If the signalling thread always
|
||
|
|
// locks the mutex during signalling, then the waiting thread
|
||
|
|
// knows that signals will only happen during wait() and not be
|
||
|
|
// missed at other times.
|
||
|
|
|
||
|
|
void lock();
|
||
|
|
void unlock();
|
||
|
|
void wait(int us = 0);
|
||
|
|
|
||
|
|
void signal();
|
||
|
|
|
||
|
|
private:
|
||
|
|
|
||
|
|
#ifdef _WIN32
|
||
|
|
HANDLE m_mutex;
|
||
|
|
HANDLE m_condition;
|
||
|
|
bool m_locked;
|
||
|
|
#else
|
||
|
|
#ifdef USE_PTHREADS
|
||
|
|
pthread_mutex_t m_mutex;
|
||
|
|
pthread_cond_t m_condition;
|
||
|
|
bool m_locked;
|
||
|
|
#endif
|
||
|
|
#endif
|
||
|
|
#ifdef DEBUG_CONDITION
|
||
|
|
std::string m_name;
|
||
|
|
#endif
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif
|