[Mod-c-cvs] ehtml/include Profiling.h,NONE,1.1

[Gonzalo A. <ga...@us...>]

Update of /cvsroot/mod-c/ehtml/include
In directory sc8-pr-cvs7.sourceforge.net:/tmp/cvs-serv22962/include

Added Files:
	Profiling.h 
Log Message:
Profiling classes & macro ("ProfileMe").


--- NEW FILE: Profiling.h ---

#ifndef __PROFILING_H_
#define __PROFILING_H_

//////////////////////////////////////////////////////////////////////////////
//
// Profiling declarations
//

typedef int64_t hrtime_t;

static inline hrtime_t get_tick(void) {
	hrtime_t regs;
	asm volatile ("rdtsc":"=A" (regs));
	return regs;
}

class ProfileFunction {
	hrtime_t _accum;
	int64_t _ncalls;
	int _overflows;
	int _depth;
	const char* _name;
	const char* _file;
	int _line;
	ProfileFunction *_next, *_prev;
	static ProfileFunction *_head;
	friend class ProfileRun;

public:
	ProfileFunction(const char* name, const char* file, int line):
		_accum(0), _ncalls(0), _overflows(0), _depth(0),
		_name(name), _file(file), _line(line) {
		_next = _head;
		_prev = NULL;
		if (_next)
			_next->_prev = this;
		_head = this;
	}
	~ProfileFunction() {
		if (_next)
			_next->_prev = _prev;
		if (_prev)
			_prev->_next = _next;
		else
			_head = _next;
	}

	static ProfileFunction* Head() { return _head; }
	ProfileFunction* Next() { return _next; }

	hrtime_t Accum() const { return _accum; }
	int64_t NCalls() const { return _ncalls; }
	int Overflows() const { return _overflows; }
	const char* Function() const { return _name; }
	const char* File() const { return _file; }
	int Line() const { return _line; }
};

class ProfileRun {
	hrtime_t _started;
	ProfileFunction* _f;
public:
	ProfileRun(ProfileFunction* f): _started(get_tick()), _f(f) { ; }
	~ProfileRun() {
		hrtime_t diff = get_tick() - _started;
		if (diff < 0) {
			++_f->_overflows;
			return;
		}
		_f->_accum += diff;
		++_f->_ncalls;
	}
};

#define ProfileMe \
	static ProfileFunction(__PRETTY_FUNCTION__, __FILE__, __LINE__) __profile;\
	ProfileRun __profile_run(&__profileme);

#endif