parser3/src/include/pa_threads.h - diff

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Diff for /parser3/src/include/pa_threads.h between versions 1.8 and 1.22

version 1.8, 2001/03/19 16:44:00	version 1.22, 2002/02/08 07:27:45
Line 1	Line 1
/** @file	/** @file
Parser	Parser: mutex & helpers decls.
Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)	Copyright (c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com)
	Author: Alexander Petrosyan <paf@design.ru> (http://paf.design.ru)

$Id$	$Id$
*/	*/
Line 9	Line 10
#ifndef PA_THREADS_H	#ifndef PA_THREADS_H
#define PA_THREADS_H	#define PA_THREADS_H

#ifdef HAVE_CONFIG_H	#include "pa_config_includes.h"
# include "pa_config.h"
#endif

#include "pa_types.h"	#include "pa_types.h"

	/// thread ID type
	typedef unsigned int pa_thread_t;

#ifdef MULTITHREAD	/// get caller thread ID
	pa_thread_t pa_get_thread_id();

	class AutoSYNCHRONIZED;

/// simple semaphore object	/// simple semaphore object
class Mutex {	class Mutex {
	friend class AutoSYNCHRONIZED;
	private:
uint handle;	uint handle;
public:	public:
Mutex();	Mutex();
~Mutex();	~Mutex();
	private: // for AutoSYNCHRONIZED
void acquire();	void acquire();
void release();	void release();
};	};

	extern const bool parser_multithreaded;
extern Mutex global_mutex;	extern Mutex global_mutex;

/**	/**
Line 36 extern Mutex global_mutex;	Line 43 extern Mutex global_mutex;
Use it with SYNCHRONIZED macro	Use it with SYNCHRONIZED macro
*/	*/
class AutoSYNCHRONIZED {	class AutoSYNCHRONIZED {
bool thread_safe;
public:	public:
AutoSYNCHRONIZED(bool athread_safe) : thread_safe(athread_safe) {	AutoSYNCHRONIZED() { global_mutex.acquire(); }
if(thread_safe)	~AutoSYNCHRONIZED() { global_mutex.release(); }
global_mutex.acquire();
}
~AutoSYNCHRONIZED() {
if(thread_safe)
global_mutex.release();
}
};	};

/**	/**
put it to first line of a function to ensure thread safety.	put it to first line of a function to ensure thread safety.

@verbatim	@verbatim
void someclass::somefunc(...) { SYNCHRONIZED(thread_safe);	void someclass::somefunc(...) { SYNCHRONIZED;
...	...
}	}
@endverbatim	@endverbatim

considering \a thread_safe to be the object field to flag	WARNING: don't use THROW or PTHROW with such thread safety mechanizm -
whether safety is really needed in this particular object instance	longjmp would leave global_mutex acquired, which is wrong!
*/	*/
#define SYNCHRONIZED(athread_safe) AutoSYNCHRONIZED autoSYNCHRONIZED(athread_safe)	#define SYNCHRONIZED AutoSYNCHRONIZED autoSYNCHRONIZED

#else // not MULTITHREAD-ed

#define SYNCHRONIZED(athread_safe) /* do nothing */

#endif


#endif	#endif

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Removed from v.1.8
changed lines
	Added in v.1.22