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simgear/simgear/structure/subsystem_mgr.cxx
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// 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.
//
// $Id$
#ifdef HAVE_CONFIG_H
# include <simgear_config.h>
#endif
#include <simgear/debug/logstream.hxx>
#include <simgear/timing/timestamp.hxx>
#include "exception.hxx"
#include "subsystem_mgr.hxx"
#include <simgear/math/SGMath.hxx>
#include "SGSmplstat.hxx"
const int SG_MAX_SUBSYSTEM_EXCEPTIONS = 4;
using std::string;
////////////////////////////////////////////////////////////////////////
// Implementation of SGSubsystem
////////////////////////////////////////////////////////////////////////
SGSubsystemTimingCb SGSubsystem::reportTimingCb = NULL;
void* SGSubsystem::reportTimingUserData = NULL;
SGSubsystem::SGSubsystem ()
: _suspended(false)
{
}
SGSubsystem::~SGSubsystem ()
{
}
void
SGSubsystem::init ()
{
}
SGSubsystem::InitStatus
SGSubsystem::incrementalInit ()
{
init();
return INIT_DONE;
}
void
SGSubsystem::postinit ()
{
}
void
SGSubsystem::reinit ()
{
}
void
SGSubsystem::shutdown ()
{
}
void
SGSubsystem::bind ()
{
}
void
SGSubsystem::unbind ()
{
}
void
SGSubsystem::suspend ()
{
_suspended = true;
}
void
SGSubsystem::suspend (bool suspended)
{
_suspended = suspended;
}
void
SGSubsystem::resume ()
{
_suspended = false;
}
bool
SGSubsystem::is_suspended () const
{
return _suspended;
}
void SGSubsystem::stamp(const string& name)
{
timingInfo.push_back(TimingInfo(name, SGTimeStamp::now()));
}
////////////////////////////////////////////////////////////////////////
// Implementation of SGSubsystemGroup.
////////////////////////////////////////////////////////////////////////
class SGSubsystemGroup::Member
{
private:
Member (const Member &member);
public:
Member ();
virtual ~Member ();
virtual void update (double delta_time_sec);
void reportTiming(void) { if (reportTimingCb) reportTimingCb(reportTimingUserData, name, &timeStat); }
void updateExecutionTime(double time) { timeStat += time;}
SampleStatistic timeStat;
std::string name;
SGSharedPtr<SGSubsystem> subsystem;
double min_step_sec;
double elapsed_sec;
bool collectTimeStats;
int exceptionCount;
int initTime;
};
SGSubsystemGroup::SGSubsystemGroup () :
_fixedUpdateTime(-1.0),
_updateTimeRemainder(0.0),
_initPosition(0)
{
}
SGSubsystemGroup::~SGSubsystemGroup ()
{
// reverse order to prevent order dependency problems
for( size_t i = _members.size(); i > 0; i-- )
{
delete _members[i-1];
}
}
void
SGSubsystemGroup::init ()
{
for( size_t i = 0; i < _members.size(); i++ )
_members[i]->subsystem->init();
}
SGSubsystem::InitStatus
SGSubsystemGroup::incrementalInit()
{
if (_initPosition >= _members.size())
return INIT_DONE;
SGTimeStamp st;
st.stamp();
InitStatus memberStatus = _members[_initPosition]->subsystem->incrementalInit();
_members[_initPosition]->initTime += st.elapsedMSec();
if (memberStatus == INIT_DONE)
++_initPosition;
return INIT_CONTINUE;
}
void
SGSubsystemGroup::postinit ()
{
for( size_t i = 0; i < _members.size(); i++ )
_members[i]->subsystem->postinit();
}
void
SGSubsystemGroup::reinit ()
{
for( size_t i = 0; i < _members.size(); i++ )
_members[i]->subsystem->reinit();
}
void
SGSubsystemGroup::shutdown ()
{
// reverse order to prevent order dependency problems
for( size_t i = _members.size(); i > 0; i-- )
_members[i-1]->subsystem->shutdown();
_initPosition = 0;
}
void
SGSubsystemGroup::bind ()
{
for( size_t i = 0; i < _members.size(); i++ )
_members[i]->subsystem->bind();
}
void
SGSubsystemGroup::unbind ()
{
// reverse order to prevent order dependency problems
for( size_t i = _members.size(); i > 0; i-- )
_members[i-1]->subsystem->unbind();
}
void
SGSubsystemGroup::update (double delta_time_sec)
{
int loopCount = 1;
// if dt == 0.0, we are paused, so we need to run one iteration
// of our members; if we have a fixed update time, we compute a
// loop count, and locally adjust dt
if ((delta_time_sec > 0.0) && (_fixedUpdateTime > 0.0)) {
double localDelta = delta_time_sec + _updateTimeRemainder;
loopCount = SGMiscd::roundToInt(localDelta / _fixedUpdateTime);
_updateTimeRemainder = delta_time_sec - (loopCount * _fixedUpdateTime);
delta_time_sec = _fixedUpdateTime;
}
bool recordTime = (reportTimingCb != NULL);
SGTimeStamp timeStamp;
while (loopCount-- > 0) {
for( size_t i = 0; i < _members.size(); i++ )
{
if (recordTime)
timeStamp = SGTimeStamp::now();
_members[i]->update(delta_time_sec); // indirect call
if ((recordTime)&&(reportTimingCb))
{
timeStamp = SGTimeStamp::now() - timeStamp;
_members[i]->updateExecutionTime(timeStamp.toUSecs());
}
}
} // of multiple update loop
}
void
SGSubsystemGroup::reportTiming(void)
{
for( size_t i = _members.size(); i > 0; i-- )
{
_members[i-1]->reportTiming();
}
}
void
SGSubsystemGroup::suspend ()
{
for( size_t i = 0; i < _members.size(); i++ )
_members[i]->subsystem->suspend();
}
void
SGSubsystemGroup::resume ()
{
for( size_t i = 0; i < _members.size(); i++ )
_members[i]->subsystem->resume();
}
string_list
SGSubsystemGroup::member_names() const
{
string_list result;
for( size_t i = 0; i < _members.size(); i++ )
result.push_back( _members[i]->name );
return result;
}
bool
SGSubsystemGroup::is_suspended () const
{
return false;
}
void
SGSubsystemGroup::set_subsystem (const string &name, SGSubsystem * subsystem,
double min_step_sec)
{
Member * member = get_member(name, true);
if (member->subsystem != 0)
delete member->subsystem;
member->name = name;
member->subsystem = subsystem;
member->min_step_sec = min_step_sec;
}
SGSubsystem *
SGSubsystemGroup::get_subsystem (const string &name)
{
Member * member = get_member(name);
if (member != 0)
return member->subsystem;
else
return 0;
}
void
SGSubsystemGroup::remove_subsystem (const string &name)
{
MemberVec::iterator it = _members.begin();
for (; it != _members.end(); ++it) {
if (name == (*it)->name) {
delete *it;
_members.erase(it);
return;
}
}
SG_LOG(SG_GENERAL, SG_WARN, "remove_subsystem: missing:" << name);
}
//------------------------------------------------------------------------------
void SGSubsystemGroup::clearSubsystems()
{
for( MemberVec::iterator it = _members.begin();
it != _members.end();
++it )
delete *it;
_members.clear();
}
void
SGSubsystemGroup::set_fixed_update_time(double dt)
{
_fixedUpdateTime = dt;
}
bool
SGSubsystemGroup::has_subsystem (const string &name) const
{
return (((SGSubsystemGroup *)this)->get_member(name) != 0);
}
SGSubsystemGroup::Member *
SGSubsystemGroup::get_member (const string &name, bool create)
{
for( size_t i = 0; i < _members.size(); i++ ) {
if (_members[i]->name == name)
return _members[i];
}
if (create) {
Member * member = new Member;
_members.push_back(member);
return member;
} else {
return 0;
}
}
////////////////////////////////////////////////////////////////////////
// Implementation of SGSubsystemGroup::Member
////////////////////////////////////////////////////////////////////////
SGSubsystemGroup::Member::Member ()
: name(""),
subsystem(0),
min_step_sec(0),
elapsed_sec(0),
exceptionCount(0),
initTime(0)
{
}
// This shouldn't be called due to subsystem pointer ownership issues.
SGSubsystemGroup::Member::Member (const Member &)
{
}
SGSubsystemGroup::Member::~Member ()
{
}
void
SGSubsystemGroup::Member::update (double delta_time_sec)
{
elapsed_sec += delta_time_sec;
if (elapsed_sec < min_step_sec) {
return;
}
if (subsystem->is_suspended()) {
return;
}
try {
subsystem->update(elapsed_sec);
elapsed_sec = 0;
} catch (sg_exception& e) {
SG_LOG(SG_GENERAL, SG_ALERT, "caught exception processing subsystem:" << name
<< "\nmessage:" << e.getMessage());
if (++exceptionCount > SG_MAX_SUBSYSTEM_EXCEPTIONS) {
SG_LOG(SG_GENERAL, SG_ALERT, "(exceptionCount=" << exceptionCount <<
", suspending)");
subsystem->suspend();
}
}
}
////////////////////////////////////////////////////////////////////////
// Implementation of SGSubsystemMgr.
////////////////////////////////////////////////////////////////////////
SGSubsystemMgr::SGSubsystemMgr () :
_initPosition(0)
{
for (int i = 0; i < MAX_GROUPS; i++) {
_groups[i] = new SGSubsystemGroup;
}
}
SGSubsystemMgr::~SGSubsystemMgr ()
{
// ensure get_subsystem returns NULL from now onwards,
// before the SGSubsystemGroup destructors are run
_subsystem_map.clear();
for (int i = 0; i < MAX_GROUPS; i++) {
delete _groups[i];
}
}
void
SGSubsystemMgr::init ()
{
for (int i = 0; i < MAX_GROUPS; i++)
_groups[i]->init();
}
SGSubsystem::InitStatus
SGSubsystemMgr::incrementalInit()
{
if (_initPosition >= MAX_GROUPS)
return INIT_DONE;
InitStatus memberStatus = _groups[_initPosition]->incrementalInit();
if (memberStatus == INIT_DONE)
++_initPosition;
return INIT_CONTINUE;
}
void
SGSubsystemMgr::postinit ()
{
for (int i = 0; i < MAX_GROUPS; i++)
_groups[i]->postinit();
}
void
SGSubsystemMgr::reinit ()
{
for (int i = 0; i < MAX_GROUPS; i++)
_groups[i]->reinit();
}
void
SGSubsystemMgr::shutdown ()
{
// reverse order to prevent order dependency problems
for (int i = MAX_GROUPS-1; i >= 0; i--)
_groups[i]->shutdown();
_initPosition = 0;
}
void
SGSubsystemMgr::bind ()
{
for (int i = 0; i < MAX_GROUPS; i++)
_groups[i]->bind();
}
void
SGSubsystemMgr::unbind ()
{
// reverse order to prevent order dependency problems
for (int i = MAX_GROUPS-1; i >= 0; i--)
_groups[i]->unbind();
}
void
SGSubsystemMgr::update (double delta_time_sec)
{
for (int i = 0; i < MAX_GROUPS; i++) {
_groups[i]->update(delta_time_sec);
}
}
void
SGSubsystemMgr::suspend ()
{
for (int i = 0; i < MAX_GROUPS; i++)
_groups[i]->suspend();
}
void
SGSubsystemMgr::resume ()
{
for (int i = 0; i < MAX_GROUPS; i++)
_groups[i]->resume();
}
bool
SGSubsystemMgr::is_suspended () const
{
return false;
}
void
SGSubsystemMgr::add (const char * name, SGSubsystem * subsystem,
GroupType group, double min_time_sec)
{
SG_LOG(SG_GENERAL, SG_DEBUG, "Adding subsystem " << name);
get_group(group)->set_subsystem(name, subsystem, min_time_sec);
if (_subsystem_map.find(name) != _subsystem_map.end()) {
SG_LOG(SG_GENERAL, SG_ALERT, "Adding duplicate subsystem " << name);
throw sg_exception("duplicate subsystem:" + std::string(name));
}
_subsystem_map[name] = subsystem;
}
void
SGSubsystemMgr::remove(const char* name)
{
SubsystemDict::iterator s =_subsystem_map.find(name);
if (s == _subsystem_map.end()) {
return;
}
_subsystem_map.erase(s);
// tedious part - we don't know which group the subsystem belongs too
for (int i = 0; i < MAX_GROUPS; i++) {
if (_groups[i]->get_subsystem(name) != NULL) {
_groups[i]->remove_subsystem(name);
break;
}
} // of groups iteration
}
SGSubsystemGroup *
SGSubsystemMgr::get_group (GroupType group)
{
return _groups[group];
}
SGSubsystem *
SGSubsystemMgr::get_subsystem (const string &name) const
{
SubsystemDict::const_iterator s =_subsystem_map.find(name);
if (s == _subsystem_map.end())
return 0;
else
return s->second;
}
/** Trigger the timing callback to report data for all subsystems. */
void
SGSubsystemMgr::reportTiming()
{
for (int i = 0; i < MAX_GROUPS; i++) {
_groups[i]->reportTiming();
} // of groups iteration
}
// end of subsystem_mgr.cxx
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