413 lines
11 KiB
C++
413 lines
11 KiB
C++
// Written by David Megginson, started 2000-12
|
|
//
|
|
// Copyright (C) 2000 David Megginson, david@megginson.com
|
|
//
|
|
// This program is free software; you can redistribute it and/or
|
|
// modify it under the terms of the GNU General Public License as
|
|
// published by the Free Software Foundation; either version 2 of the
|
|
// License, or (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful, but
|
|
// WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
// General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program; if not, write to the Free Software
|
|
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
//
|
|
// $Id$
|
|
|
|
|
|
#ifndef __SUBSYSTEM_MGR_HXX
|
|
#define __SUBSYSTEM_MGR_HXX 1
|
|
|
|
|
|
#include <simgear/compiler.h>
|
|
|
|
#include <string>
|
|
#include <map>
|
|
#include <vector>
|
|
|
|
using std::map;
|
|
using std::vector;
|
|
using std::string;
|
|
|
|
#include <simgear/props/props.hxx>
|
|
#include <simgear/timing/timestamp.hxx>
|
|
#include "SGSmplstat.hxx"
|
|
|
|
|
|
class TimingInfo
|
|
{
|
|
private:
|
|
string eventName;
|
|
SGTimeStamp time;
|
|
|
|
public:
|
|
TimingInfo(string name, SGTimeStamp &t) { eventName = name; time = t;};
|
|
string getName() { return eventName; };
|
|
SGTimeStamp getTime() { return time; };
|
|
};
|
|
|
|
typedef vector<TimingInfo> eventTimeVec;
|
|
typedef vector<TimingInfo>::iterator eventTimeVecIterator;
|
|
|
|
|
|
|
|
/**
|
|
* Basic interface for all FlightGear subsystems.
|
|
*
|
|
* <p>This is an abstract interface that all FlightGear subsystems
|
|
* will eventually implement. It defines the basic operations for
|
|
* each subsystem: initialization, property binding and unbinding, and
|
|
* updating. Interfaces may define additional methods, but the
|
|
* preferred way of exchanging information with other subsystems is
|
|
* through the property tree.</p>
|
|
*
|
|
* <p>To publish information through a property, a subsystem should
|
|
* bind it to a variable or (if necessary) a getter/setter pair in the
|
|
* bind() method, and release the property in the unbind() method:</p>
|
|
*
|
|
* <pre>
|
|
* void MySubsystem::bind ()
|
|
* {
|
|
* fgTie("/controls/flight/elevator", &_elevator);
|
|
* fgSetArchivable("/controls/flight/elevator");
|
|
* }
|
|
*
|
|
* void MySubsystem::unbind ()
|
|
* {
|
|
* fgUntie("/controls/flight/elevator");
|
|
* }
|
|
* </pre>
|
|
*
|
|
* <p>To reference a property (possibly) from another subsystem, there
|
|
* are two alternatives. If the property will be referenced only
|
|
* infrequently (say, in the init() method), then the fgGet* methods
|
|
* declared in fg_props.hxx are the simplest:</p>
|
|
*
|
|
* <pre>
|
|
* void MySubsystem::init ()
|
|
* {
|
|
* _errorMargin = fgGetFloat("/display/error-margin-pct");
|
|
* }
|
|
* </pre>
|
|
*
|
|
* <p>On the other hand, if the property will be referenced frequently
|
|
* (say, in the update() method), then the hash-table lookup required
|
|
* by the fgGet* methods might be too expensive; instead, the
|
|
* subsystem should obtain a reference to the actual property node in
|
|
* its init() function and use that reference in the main loop:</p>
|
|
*
|
|
* <pre>
|
|
* void MySubsystem::init ()
|
|
* {
|
|
* _errorNode = fgGetNode("/display/error-margin-pct", true);
|
|
* }
|
|
*
|
|
* void MySubsystem::update (double delta_time_sec)
|
|
* {
|
|
* do_something(_errorNode.getFloatValue());
|
|
* }
|
|
* </pre>
|
|
*
|
|
* <p>The node returned will always be a pointer to SGPropertyNode,
|
|
* and the subsystem should <em>not</em> delete it in its destructor
|
|
* (the pointer belongs to the property tree, not the subsystem).</p>
|
|
*
|
|
* <p>The program may ask the subsystem to suspend or resume
|
|
* sim-time-dependent operations; by default, the suspend() and
|
|
* resume() methods set the protected variable <var>_suspended</var>,
|
|
* which the subsystem can reference in its update() method, but
|
|
* subsystems may also override the suspend() and resume() methods to
|
|
* take different actions.</p>
|
|
*/
|
|
class SGSubsystem : public SGReferenced
|
|
{
|
|
public:
|
|
|
|
/**
|
|
* Default constructor.
|
|
*/
|
|
SGSubsystem ();
|
|
|
|
/**
|
|
* Virtual destructor to ensure that subclass destructors are called.
|
|
*/
|
|
virtual ~SGSubsystem ();
|
|
|
|
|
|
/**
|
|
* Initialize the subsystem.
|
|
*
|
|
* <p>This method should set up the state of the subsystem, but
|
|
* should not bind any properties. Note that any dependencies on
|
|
* the state of other subsystems should be placed here rather than
|
|
* in the constructor, so that FlightGear can control the
|
|
* initialization order.</p>
|
|
*/
|
|
virtual void init ();
|
|
|
|
|
|
/**
|
|
* Initialize parts that depend on other subsystems having been initialized.
|
|
*
|
|
* <p>This method should set up all parts that depend on other
|
|
* subsystems. One example is the scripting/Nasal subsystem, which
|
|
* is initialized last. So, if a subsystem wants to execute Nasal
|
|
* code in subsystem-specific configuration files, it has to do that
|
|
* in its postinit() method.</p>
|
|
*/
|
|
virtual void postinit ();
|
|
|
|
|
|
/**
|
|
* Reinitialize the subsystem.
|
|
*
|
|
* <p>This method should cause the subsystem to reinitialize itself,
|
|
* and (normally) to reload any configuration files.</p>
|
|
*/
|
|
virtual void reinit ();
|
|
|
|
|
|
/**
|
|
* Acquire the subsystem's property bindings.
|
|
*
|
|
* <p>This method should bind all properties that the subsystem
|
|
* publishes. It will be invoked after init, but before any
|
|
* invocations of update.</p>
|
|
*/
|
|
virtual void bind ();
|
|
|
|
|
|
/**
|
|
* Release the subsystem's property bindings.
|
|
*
|
|
* <p>This method should release all properties that the subsystem
|
|
* publishes. It will be invoked by FlightGear (not the destructor)
|
|
* just before the subsystem is removed.</p>
|
|
*/
|
|
virtual void unbind ();
|
|
|
|
|
|
/**
|
|
* Update the subsystem.
|
|
*
|
|
* <p>FlightGear invokes this method every time the subsystem should
|
|
* update its state.</p>
|
|
*
|
|
* @param delta_time_sec The delta time, in seconds, since the last
|
|
* update. On first update, delta time will be 0.
|
|
*/
|
|
virtual void update (double delta_time_sec) = 0;
|
|
|
|
|
|
/**
|
|
* Suspend operation of this subsystem.
|
|
*
|
|
* <p>This method instructs the subsystem to suspend
|
|
* sim-time-dependent operations until asked to resume. The update
|
|
* method will still be invoked so that the subsystem can take any
|
|
* non-time-dependent actions, such as updating the display.</p>
|
|
*
|
|
* <p>It is not an error for the suspend method to be invoked when
|
|
* the subsystem is already suspended; the invocation should simply
|
|
* be ignored.</p>
|
|
*/
|
|
virtual void suspend ();
|
|
|
|
|
|
/**
|
|
* Suspend or resum operation of this subsystem.
|
|
*
|
|
* @param suspended true if the subsystem should be suspended, false
|
|
* otherwise.
|
|
*/
|
|
virtual void suspend (bool suspended);
|
|
|
|
|
|
/**
|
|
* Resume operation of this subsystem.
|
|
*
|
|
* <p>This method instructs the subsystem to resume
|
|
* sim-time-depended operations. It is not an error for the resume
|
|
* method to be invoked when the subsystem is not suspended; the
|
|
* invocation should simply be ignored.</p>
|
|
*/
|
|
virtual void resume ();
|
|
|
|
|
|
/**
|
|
* Test whether this subsystem is suspended.
|
|
*
|
|
* @return true if the subsystem is suspended, false if it is not.
|
|
*/
|
|
virtual bool is_suspended () const;
|
|
|
|
|
|
/**
|
|
* Keep track of execution time.
|
|
*
|
|
* <p>This method keeps track of timing statistics for each subsystem.</p>
|
|
*
|
|
* @param time execution time in ms of last call.
|
|
*/
|
|
void updateExecutionTime(double time);
|
|
|
|
/**
|
|
* Print details of execution time.
|
|
*
|
|
* <p>For debugging purposes, developers can place stamp() calls
|
|
* at strategic points in the update() function of each subsystem, which
|
|
* record the time between the successive calls to stamp. This method,
|
|
* printExecutionTime() is called after exectution of the subsystem
|
|
* update function itself to conduct a post-hoc analysis of excecution
|
|
* time</p>
|
|
*/
|
|
void printTimingInformation();
|
|
|
|
/**
|
|
* Place time stamps at strategic points in the execution of subsystems
|
|
* update() member functions. Predominantly for debugging purposes.
|
|
*/
|
|
void stamp(string name);
|
|
|
|
|
|
|
|
protected:
|
|
|
|
bool _suspended;
|
|
|
|
eventTimeVec timingInfo;
|
|
//int test;
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
* A group of FlightGear subsystems.
|
|
*/
|
|
class SGSubsystemGroup : public SGSubsystem
|
|
{
|
|
public:
|
|
|
|
SGSubsystemGroup ();
|
|
virtual ~SGSubsystemGroup ();
|
|
|
|
virtual void init ();
|
|
virtual void postinit ();
|
|
virtual void reinit ();
|
|
virtual void bind ();
|
|
virtual void unbind ();
|
|
virtual void update (double delta_time_sec);
|
|
virtual void suspend ();
|
|
virtual void resume ();
|
|
virtual bool is_suspended () const;
|
|
|
|
virtual void set_subsystem (const string &name,
|
|
SGSubsystem * subsystem,
|
|
double min_step_sec = 0);
|
|
virtual SGSubsystem * get_subsystem (const string &name);
|
|
virtual void remove_subsystem (const string &name);
|
|
virtual bool has_subsystem (const string &name) const;
|
|
|
|
void collectDebugTiming(bool collect);
|
|
|
|
private:
|
|
|
|
struct Member {
|
|
|
|
Member ();
|
|
Member (const Member &member);
|
|
virtual ~Member ();
|
|
|
|
virtual void update (double delta_time_sec);
|
|
void printTimingInformation(double time);
|
|
void printTimingStatistics();
|
|
void updateExecutionTime(double time);
|
|
double getTimeWarningThreshold();
|
|
void collectDebugTiming (bool collect) { collectTimeStats = collect; };
|
|
|
|
SampleStatistic timeStat;
|
|
string name;
|
|
SGSubsystem * subsystem;
|
|
double min_step_sec;
|
|
double elapsed_sec;
|
|
bool collectTimeStats;
|
|
};
|
|
|
|
Member * get_member (const string &name, bool create = false);
|
|
|
|
vector<Member *> _members;
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
* Manage subsystems for FlightGear.
|
|
*
|
|
* This top-level subsystem will eventually manage all of the
|
|
* subsystems in FlightGear: it broadcasts its life-cycle events
|
|
* (init, bind, etc.) to all of the subsystems it manages. Subsystems
|
|
* are grouped to guarantee order of initialization and execution --
|
|
* currently, the only two groups are INIT and GENERAL, but others
|
|
* will appear in the future.
|
|
*
|
|
* All subsystems are named as well as grouped, and subsystems can be
|
|
* looked up by name and cast to the appropriate subtype when another
|
|
* subsystem needs to invoke specialized methods.
|
|
*
|
|
* The subsystem manager owns the pointers to all the subsystems in
|
|
* it.
|
|
*/
|
|
class SGSubsystemMgr : public SGSubsystem
|
|
{
|
|
public:
|
|
|
|
/**
|
|
* Types of subsystem groups.
|
|
*/
|
|
enum GroupType {
|
|
INIT = 0,
|
|
GENERAL,
|
|
MAX_GROUPS
|
|
};
|
|
|
|
SGSubsystemMgr ();
|
|
virtual ~SGSubsystemMgr ();
|
|
|
|
virtual void init ();
|
|
virtual void postinit ();
|
|
virtual void reinit ();
|
|
virtual void bind ();
|
|
virtual void unbind ();
|
|
virtual void update (double delta_time_sec);
|
|
virtual void suspend ();
|
|
virtual void resume ();
|
|
virtual bool is_suspended () const;
|
|
|
|
virtual void add (const char * name,
|
|
SGSubsystem * subsystem,
|
|
GroupType group = GENERAL,
|
|
double min_time_sec = 0);
|
|
|
|
virtual SGSubsystemGroup * get_group (GroupType group);
|
|
|
|
virtual SGSubsystem * get_subsystem(const string &name);
|
|
|
|
void collectDebugTiming(bool collect);
|
|
|
|
private:
|
|
|
|
SGSubsystemGroup _groups[MAX_GROUPS];
|
|
map<string,SGSubsystem *> _subsystem_map;
|
|
|
|
};
|
|
|
|
|
|
|
|
#endif // __SUBSYSTEM_MGR_HXX
|
|
|