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// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/***************************************************************************
profiler.h
Functions to manage profiling of MAME execution.
****************************************************************************
Profiling is scope-based. To start profiling, put a profiler scope
object on the stack. To end profiling, just end the scope:
{
auto scope = g_profiler.start(PROFILER_VIDEO);
your_work_here();
}
the profiler handles a FILO list so calls may be nested.
***************************************************************************/
#ifndef MAME_EMU_PROFILER_H
#define MAME_EMU_PROFILER_H
#pragma once
#include "emufwd.h"
#include "attotime.h"
#include "eminline.h" // for get_profile_ticks()
#include "osdcore.h"
#include <cstdio>
#include <cstdlib>
#include <string>
//**************************************************************************
// CONSTANTS
//**************************************************************************
enum profile_type
{
PROFILER_DEVICE_FIRST = 0,
PROFILER_DEVICE_MAX = PROFILER_DEVICE_FIRST + 256,
PROFILER_DRC_COMPILE,
PROFILER_MEM_REMAP,
PROFILER_MEMREAD,
PROFILER_MEMWRITE,
PROFILER_VIDEO,
PROFILER_DRAWGFX,
PROFILER_COPYBITMAP,
PROFILER_TILEMAP_DRAW,
PROFILER_TILEMAP_DRAW_ROZ,
PROFILER_TILEMAP_UPDATE,
PROFILER_BLIT,
PROFILER_SOUND,
PROFILER_TIMER_CALLBACK,
PROFILER_INPUT, // input.cpp and inptport.cpp
PROFILER_MOVIE_REC, // movie recording
PROFILER_LOGERROR, // logerror
PROFILER_LUA, // LUA
PROFILER_EXTRA, // everything else
// the USER types are available to driver writers to profile
// custom sections of the code
PROFILER_USER1,
PROFILER_USER2,
PROFILER_USER3,
PROFILER_USER4,
PROFILER_USER5,
PROFILER_USER6,
PROFILER_USER7,
PROFILER_USER8,
PROFILER_PROFILER,
PROFILER_IDLE,
PROFILER_TOTAL
};
DECLARE_ENUM_INCDEC_OPERATORS(profile_type)
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> real_profiler_state
class real_profiler_state
{
public:
class scope
{
private:
real_profiler_state &m_host;
bool m_active;
public:
scope(scope const &) = delete;
scope &operator=(scope const &) = delete;
scope(scope &&that) noexcept : m_host(that.m_host), m_active(that.m_active)
{
that.m_active = false;
}
scope(real_profiler_state &host, profile_type type) noexcept : m_host(host), m_active(false)
{
if (m_host.enabled())
{
m_host.real_start(type);
m_active = true;
}
}
~scope()
{
stop();
}
void stop() noexcept
{
if (m_active)
{
m_host.real_stop();
m_active = false;
}
}
};
// construction/destruction
real_profiler_state();
// getters
bool enabled() const noexcept
{
return m_filoptr != nullptr;
}
const char *text(running_machine &machine);
// enable/disable
void enable(bool state = true) noexcept
{
if (state != enabled())
{
reset(state);
}
}
// start/stop
[[nodiscard]] auto start(profile_type type) noexcept { return scope(*this, type); }
private:
// an entry in the FILO
struct filo_entry
{
int type; // type of entry
osd_ticks_t start; // start time
};
void reset(bool enabled) noexcept;
void update_text(running_machine &machine);
//-------------------------------------------------
// real_start - mark the beginning of a
// profiler entry
//-------------------------------------------------
ATTR_FORCE_INLINE void real_start(profile_type type) noexcept
{
// fail if we overflow
if (UNEXPECTED(m_filoptr >= &m_filo[std::size(m_filo) - 1]))
{
std::fprintf(stderr, "Profiler FILO overflow (type = %d)\n", int(type));
std::abort();
}
// get current tick count
osd_ticks_t curticks = get_profile_ticks();
// update previous entry
m_data[m_filoptr->type] += curticks - m_filoptr->start;
// move to next entry
m_filoptr++;
// fill in this entry
m_filoptr->type = type;
m_filoptr->start = curticks;
}
//-------------------------------------------------
// real_stop - mark the end of a profiler entry
//-------------------------------------------------
ATTR_FORCE_INLINE void real_stop() noexcept
{
// degenerate scenario
if (UNEXPECTED(m_filoptr <= m_filo))
return;
// get current tick count
osd_ticks_t curticks = get_profile_ticks();
// account for the time taken
m_data[m_filoptr->type] += curticks - m_filoptr->start;
// move back an entry
m_filoptr--;
// reset previous entry start time
m_filoptr->start = curticks;
}
// internal state
filo_entry * m_filoptr; // current FILO index
std::string m_text; // profiler text
attotime m_text_time; // profiler text last update
filo_entry m_filo[32]; // array of FILO entries
osd_ticks_t m_data[PROFILER_TOTAL + 1]; // array of data
};
// ======================> dummy_profiler_state
class dummy_profiler_state
{
public:
class scope
{
private:
dummy_profiler_state &m_host;
public:
scope(scope const &) = delete;
scope &operator=(scope const &) = delete;
scope(scope &&that) noexcept = default;
scope(dummy_profiler_state &host, profile_type type) noexcept : m_host(host) { }
~scope() { m_host.real_stop(); }
void stop() noexcept { }
};
// construction/destruction
dummy_profiler_state();
// getters
bool enabled() const noexcept { return false; }
const char *text(running_machine &machine) { return ""; }
// enable/disable
void enable(bool state = true) noexcept { }
// start/stop
[[nodiscard]] auto start(profile_type type) noexcept { return scope(*this, type); }
private:
void real_stop() noexcept { }
};
// ======================> profiler_state
#ifdef MAME_PROFILER
typedef real_profiler_state profiler_state;
#else
typedef dummy_profiler_state profiler_state;
#endif
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
extern profiler_state g_profiler;
#endif // MAME_EMU_PROFILER_H
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