qzdoom-gpl/src/dobjgc.cpp

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/*
** dobjgc.cpp
** The garbage collector. Based largely on Lua's.
**
**---------------------------------------------------------------------------
** Copyright 2008 Randy Heit
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** 1. Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in the
** documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
** derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**---------------------------------------------------------------------------
**
*/
/******************************************************************************
* Copyright (C) 1994-2008 Lua.org, PUC-Rio. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
******************************************************************************/
// HEADER FILES ------------------------------------------------------------
#include "dobject.h"
#include "templates.h"
#include "b_bot.h"
#include "p_local.h"
#include "g_game.h"
#include "a_sharedglobal.h"
#include "sbar.h"
#include "stats.h"
#include "c_dispatch.h"
#include "p_acs.h"
#include "s_sndseq.h"
#include "r_data/r_interpolate.h"
#include "doomstat.h"
2008-09-15 00:47:31 +00:00
#include "m_argv.h"
#include "po_man.h"
#include "v_video.h"
#include "menu/menu.h"
#include "intermission/intermission.h"
// MACROS ------------------------------------------------------------------
/*
@@ DEFAULT_GCPAUSE defines the default pause between garbage-collector cycles
@* as a percentage.
** CHANGE it if you want the GC to run faster or slower (higher values
** mean larger pauses which mean slower collection.) You can also change
** this value dynamically.
*/
#define DEFAULT_GCPAUSE 150 // 150% (wait for memory to increase by half before next GC)
/*
@@ DEFAULT_GCMUL defines the default speed of garbage collection relative to
@* memory allocation as a percentage.
** CHANGE it if you want to change the granularity of the garbage
** collection. (Higher values mean coarser collections. 0 represents
** infinity, where each step performs a full collection.) You can also
** change this value dynamically.
*/
#define DEFAULT_GCMUL 400 // GC runs 'quadruple the speed' of memory allocation
// Number of sectors to mark for each step.
#define SECTORSTEPSIZE 32
#define POLYSTEPSIZE 120
#define SIDEDEFSTEPSIZE 240
#define GCSTEPSIZE 1024u
#define GCSWEEPMAX 40
#define GCSWEEPCOST 10
#define GCFINALIZECOST 100
// TYPES -------------------------------------------------------------------
// This object is responsible for marking sectors during the propagate
// stage. In case there are many, many sectors, it lets us break them
// up instead of marking them all at once.
class DSectorMarker : public DObject
{
DECLARE_CLASS(DSectorMarker, DObject)
public:
DSectorMarker() : SecNum(0),PolyNum(0),SideNum(0) {}
size_t PropagateMark();
int SecNum;
int PolyNum;
int SideNum;
};
IMPLEMENT_CLASS(DSectorMarker)
// EXTERNAL FUNCTION PROTOTYPES --------------------------------------------
// PUBLIC FUNCTION PROTOTYPES ----------------------------------------------
// PRIVATE FUNCTION PROTOTYPES ---------------------------------------------
// EXTERNAL DATA DECLARATIONS ----------------------------------------------
extern DThinker *NextToThink;
// PUBLIC DATA DEFINITIONS -------------------------------------------------
namespace GC
{
size_t AllocBytes;
size_t Threshold;
size_t Estimate;
DObject *Gray;
DObject *Root;
DObject *SoftRoots;
DObject **SweepPos;
DWORD CurrentWhite = OF_White0 | OF_Fixed;
EGCState State = GCS_Pause;
int Pause = DEFAULT_GCPAUSE;
int StepMul = DEFAULT_GCMUL;
int StepCount;
size_t Dept;
// PRIVATE DATA DEFINITIONS ------------------------------------------------
static DSectorMarker *SectorMarker;
// CODE --------------------------------------------------------------------
//==========================================================================
//
// SetThreshold
//
// Sets the new threshold after a collection is finished.
//
//==========================================================================
void SetThreshold()
{
Threshold = (Estimate / 100) * Pause;
}
//==========================================================================
//
// PropagateMark
//
// Marks the top-most gray object black and marks all objects it points to
// gray.
//
//==========================================================================
size_t PropagateMark()
{
DObject *obj = Gray;
assert(obj->IsGray());
obj->Gray2Black();
Gray = obj->GCNext;
return !(obj->ObjectFlags & OF_EuthanizeMe) ? obj->PropagateMark() :
obj->GetClass()->Size;
}
//==========================================================================
//
// PropagateAll
//
// Empties the gray list by propagating every single object in it.
//
//==========================================================================
static size_t PropagateAll()
{
size_t m = 0;
while (Gray != NULL)
{
m += PropagateMark();
}
return m;
}
//==========================================================================
//
// SweepList
//
// Runs a limited sweep on a list, returning the location where to resume
// the sweep at next time. (FIXME: Horrible Engrish in this description.)
//
//==========================================================================
static DObject **SweepList(DObject **p, size_t count, size_t *finalize_count)
{
DObject *curr;
int deadmask = OtherWhite();
size_t finalized = 0;
while ((curr = *p) != NULL && count-- > 0)
{
if ((curr->ObjectFlags ^ OF_WhiteBits) & deadmask) // not dead?
{
assert(!curr->IsDead() || (curr->ObjectFlags & OF_Fixed));
curr->MakeWhite(); // make it white (for next cycle)
p = &curr->ObjNext;
}
else // must erase 'curr'
{
assert(curr->IsDead());
*p = curr->ObjNext;
if (!(curr->ObjectFlags & OF_EuthanizeMe))
{ // The object must be destroyed before it can be finalized.
// Note that thinkers must already have been destroyed. If they get here without
// having been destroyed first, it means they somehow became unattached from the
// thinker lists. If I don't maintain the invariant that all live thinkers must
// be in a thinker list, then I need to add write barriers for every time a
// thinker pointer is changed. This seems easier and perfectly reasonable, since
// a live thinker that isn't on a thinker list isn't much of a thinker.
// However, this can happen during deletion of the thinker list while cleaning up
// from a savegame error so we can't assume that any thinker that gets here is an error.
curr->Destroy();
}
curr->ObjectFlags |= OF_Cleanup;
delete curr;
finalized++;
}
}
if (finalize_count != NULL)
{
*finalize_count = finalized;
}
return p;
}
//==========================================================================
//
// Mark
//
// Mark a single object gray.
//
//==========================================================================
void Mark(DObject **obj)
{
DObject *lobj = *obj;
if (lobj != NULL)
{
if (lobj->ObjectFlags & OF_EuthanizeMe)
{
*obj = (DObject *)NULL;
}
else if (lobj->IsWhite())
{
lobj->White2Gray();
lobj->GCNext = Gray;
Gray = lobj;
}
}
}
//==========================================================================
//
// MarkRoot
//
// Mark the root set of objects.
//
//==========================================================================
static void MarkRoot()
{
int i;
Gray = NULL;
Mark(Args);
Mark(screen);
Mark(StatusBar);
Mark(DMenu::CurrentMenu);
Mark(DIntermissionController::CurrentIntermission);
DThinker::MarkRoots();
FCanvasTextureInfo::Mark();
Mark(DACSThinker::ActiveThinker);
Mark(level.DefaultSkybox);
// Mark dead bodies.
for (i = 0; i < BODYQUESIZE; ++i)
{
Mark(bodyque[i]);
}
// Mark players.
for (i = 0; i < MAXPLAYERS; i++)
{
if (playeringame[i])
players[i].PropagateMark();
}
// Mark sound sequences.
DSeqNode::StaticMarkHead();
// Mark sectors.
- The garbage collector is now run one last time just before exiting the game. - Removed movie volume from the sound menu and renamed some of the other options to give the MIDI device name more room to display itself. - Moved the midi device selection into the main sound menu. - Added FMOD as MIDI device -1, to replace the MIDI mapper. This is still the default device. By default, it uses exactly the same DLS instruments as the Microsoft GS Wavetable Synth. If you have another set DLS level 1 patch set you want to use, set the snd_midipatchfile cvar to specify where it should load the instruments from. - Changed the ProduceMIDI function to store its output into a TArray<BYTE>. An overloaded version wraps around it to continue to supply file-writing support for external Timidity++ usage. - Added an FMOD credits banner to comply with their non-commercial license. - Reimplemented the snd_buffersize cvar for the FMOD Ex sound system. Rather than a time in ms, this is now the length in samples of the DSP buffer. Also added the snd_buffercount cvar to offer complete control over the call to FMOD::System::setDSPBufferSize(). Note that with any snd_samplerate below about 44kHz, you will need to set snd_buffersize to avoid long latencies. - Reimplemented the snd_output cvar for the FMOD Ex sound system. - Changed snd_samplerate default to 0. This now means to use the default sample rate. - Made snd_output, snd_output_format, snd_speakermode, snd_resampler, and snd_hrtf available through the menu. - Split the HRTF effect selection into its own cvar: snd_hrtf. - Removed 96000 Hz option from the menu. It's still available through the cvar, if desired. - Fixed: If Windows sound init failed, retry with DirectSound. (Apparently, WASAPI doesn't work with more than two speakers and PCM-Float output at the same time.) - Fixed: Area sounds only played from the front speakers once you got within the 2D panning area. SVN r854 (trunk)
2008-03-26 04:27:07 +00:00
if (SectorMarker == NULL && sectors != NULL)
{
SectorMarker = new DSectorMarker;
}
- The garbage collector is now run one last time just before exiting the game. - Removed movie volume from the sound menu and renamed some of the other options to give the MIDI device name more room to display itself. - Moved the midi device selection into the main sound menu. - Added FMOD as MIDI device -1, to replace the MIDI mapper. This is still the default device. By default, it uses exactly the same DLS instruments as the Microsoft GS Wavetable Synth. If you have another set DLS level 1 patch set you want to use, set the snd_midipatchfile cvar to specify where it should load the instruments from. - Changed the ProduceMIDI function to store its output into a TArray<BYTE>. An overloaded version wraps around it to continue to supply file-writing support for external Timidity++ usage. - Added an FMOD credits banner to comply with their non-commercial license. - Reimplemented the snd_buffersize cvar for the FMOD Ex sound system. Rather than a time in ms, this is now the length in samples of the DSP buffer. Also added the snd_buffercount cvar to offer complete control over the call to FMOD::System::setDSPBufferSize(). Note that with any snd_samplerate below about 44kHz, you will need to set snd_buffersize to avoid long latencies. - Reimplemented the snd_output cvar for the FMOD Ex sound system. - Changed snd_samplerate default to 0. This now means to use the default sample rate. - Made snd_output, snd_output_format, snd_speakermode, snd_resampler, and snd_hrtf available through the menu. - Split the HRTF effect selection into its own cvar: snd_hrtf. - Removed 96000 Hz option from the menu. It's still available through the cvar, if desired. - Fixed: If Windows sound init failed, retry with DirectSound. (Apparently, WASAPI doesn't work with more than two speakers and PCM-Float output at the same time.) - Fixed: Area sounds only played from the front speakers once you got within the 2D panning area. SVN r854 (trunk)
2008-03-26 04:27:07 +00:00
else if (sectors == NULL)
{
SectorMarker = NULL;
}
else
{
SectorMarker->SecNum = 0;
}
Mark(SectorMarker);
// Mark bot stuff.
Mark(bglobal.firstthing);
Mark(bglobal.body1);
Mark(bglobal.body2);
// NextToThink must not be freed while thinkers are ticking.
Mark(NextToThink);
// Mark soft roots.
if (SoftRoots != NULL)
{
DObject **probe = &SoftRoots->ObjNext;
while (*probe != NULL)
{
DObject *soft = *probe;
probe = &soft->ObjNext;
if ((soft->ObjectFlags & (OF_Rooted | OF_EuthanizeMe)) == OF_Rooted)
{
Mark(soft);
}
}
}
// Time to propagate the marks.
State = GCS_Propagate;
StepCount = 0;
}
//==========================================================================
//
// Atomic
//
// If their were any propagations that needed to be done atomicly, they
// would go here. It also sets things up for the sweep state.
//
//==========================================================================
static void Atomic()
{
// Flip current white
CurrentWhite = OtherWhite();
SweepPos = &Root;
State = GCS_Sweep;
Estimate = AllocBytes;
}
//==========================================================================
//
// SingleStep
//
// Performs one step of the collector.
//
//==========================================================================
static size_t SingleStep()
{
switch (State)
{
case GCS_Pause:
MarkRoot(); // Start a new collection
return 0;
case GCS_Propagate:
if (Gray != NULL)
{
return PropagateMark();
}
else
{ // no more gray objects
Atomic(); // finish mark phase
return 0;
}
case GCS_Sweep: {
size_t old = AllocBytes;
size_t finalize_count;
SweepPos = SweepList(SweepPos, GCSWEEPMAX, &finalize_count);
if (*SweepPos == NULL)
{ // Nothing more to sweep?
State = GCS_Finalize;
}
assert(old >= AllocBytes);
Estimate -= old - AllocBytes;
return (GCSWEEPMAX - finalize_count) * GCSWEEPCOST + finalize_count * GCFINALIZECOST;
}
case GCS_Finalize:
State = GCS_Pause; // end collection
Dept = 0;
return 0;
default:
assert(0);
return 0;
}
}
//==========================================================================
//
// Step
//
// Performs enough single steps to cover GCSTEPSIZE * StepMul% bytes of
// memory.
//
//==========================================================================
void Step()
{
size_t lim = (GCSTEPSIZE/100) * StepMul;
size_t olim;
if (lim == 0)
{
lim = (~(size_t)0) / 2; // no limit
}
Dept += AllocBytes - Threshold;
do
{
olim = lim;
lim -= SingleStep();
} while (olim > lim && State != GCS_Pause);
if (State != GCS_Pause)
{
if (Dept < GCSTEPSIZE)
{
Threshold = AllocBytes + GCSTEPSIZE; // - lim/StepMul
}
else
{
Dept -= GCSTEPSIZE;
Threshold = AllocBytes;
}
}
else
{
assert(AllocBytes >= Estimate);
SetThreshold();
}
StepCount++;
}
//==========================================================================
//
// FullGC
//
// Collects everything in one fell swoop.
//
//==========================================================================
void FullGC()
{
if (State <= GCS_Propagate)
{
// Reset sweep mark to sweep all elements (returning them to white)
SweepPos = &Root;
// Reset other collector lists
Gray = NULL;
State = GCS_Sweep;
}
// Finish any pending sweep phase
while (State != GCS_Finalize)
{
SingleStep();
}
MarkRoot();
while (State != GCS_Pause)
{
SingleStep();
}
SetThreshold();
}
//==========================================================================
//
// Barrier
//
// Implements a write barrier to maintain the invariant that a black node
// never points to a white node by making the node pointed at gray.
//
//==========================================================================
void Barrier(DObject *pointing, DObject *pointed)
{
assert(pointing == NULL || (pointing->IsBlack() && !pointing->IsDead()));
assert(pointed->IsWhite() && !pointed->IsDead());
assert(State != GCS_Finalize && State != GCS_Pause);
// The invariant only needs to be maintained in the propagate state.
if (State == GCS_Propagate)
{
pointed->White2Gray();
pointed->GCNext = Gray;
Gray = pointed;
}
// In other states, we can mark the pointing object white so this
// barrier won't be triggered again, saving a few cycles in the future.
else if (pointing != NULL)
{
pointing->MakeWhite();
}
}
void DelSoftRootHead()
{
if (SoftRoots != NULL)
{
// Don't let the destructor print a warning message
SoftRoots->ObjectFlags |= OF_YesReallyDelete;
delete SoftRoots;
}
SoftRoots = NULL;
}
//==========================================================================
//
// AddSoftRoot
//
// Marks an object as a soft root. A soft root behaves exactly like a root
// in MarkRoot, except it can be added at run-time.
//
//==========================================================================
void AddSoftRoot(DObject *obj)
{
DObject **probe;
// Are there any soft roots yet?
if (SoftRoots == NULL)
{
// Create a new object to root the soft roots off of, and stick
// it at the end of the object list, so we know that anything
// before it is not a soft root.
SoftRoots = new DObject;
SoftRoots->ObjectFlags |= OF_Fixed;
probe = &Root;
while (*probe != NULL)
{
probe = &(*probe)->ObjNext;
}
Root = SoftRoots->ObjNext;
SoftRoots->ObjNext = NULL;
*probe = SoftRoots;
}
// Mark this object as rooted and move it after the SoftRoots marker.
probe = &Root;
while (*probe != NULL && *probe != obj)
{
probe = &(*probe)->ObjNext;
}
*probe = (*probe)->ObjNext;
obj->ObjNext = SoftRoots->ObjNext;
SoftRoots->ObjNext = obj;
obj->ObjectFlags |= OF_Rooted;
WriteBarrier(obj);
}
//==========================================================================
//
// DelSoftRoot
//
// Unroots an object so that it must be reachable or it will get collected.
//
//==========================================================================
void DelSoftRoot(DObject *obj)
{
DObject **probe;
if (!(obj->ObjectFlags & OF_Rooted))
{ // Not rooted, so nothing to do.
return;
}
obj->ObjectFlags &= ~OF_Rooted;
// Move object out of the soft roots part of the list.
probe = &SoftRoots;
while (*probe != NULL && *probe != obj)
{
probe = &(*probe)->ObjNext;
}
if (*probe == obj)
{
*probe = obj->ObjNext;
obj->ObjNext = Root;
Root = obj;
}
}
}
//==========================================================================
//
// DSectorMarker :: PropagateMark
//
// Propagates marks across a few sectors and reinserts itself into the
// gray list if it didn't do them all.
//
//==========================================================================
size_t DSectorMarker::PropagateMark()
{
int i;
int marked = 0;
bool moretodo = false;
if (sectors != NULL)
{
for (i = 0; i < SECTORSTEPSIZE && SecNum + i < numsectors; ++i)
{
sector_t *sec = &sectors[SecNum + i];
GC::Mark(sec->SoundTarget);
GC::Mark(sec->CeilingSkyBox);
GC::Mark(sec->FloorSkyBox);
GC::Mark(sec->SecActTarget);
GC::Mark(sec->floordata);
GC::Mark(sec->ceilingdata);
GC::Mark(sec->lightingdata);
for(int j=0;j<4;j++) GC::Mark(sec->interpolations[j]);
}
marked += i * sizeof(sector_t);
if (SecNum + i < numsectors)
{
SecNum += i;
moretodo = true;
}
}
if (!moretodo && polyobjs != NULL)
{
for (i = 0; i < POLYSTEPSIZE && PolyNum + i < po_NumPolyobjs; ++i)
{
GC::Mark(polyobjs[PolyNum + i].interpolation);
}
marked += i * sizeof(FPolyObj);
if (PolyNum + i < po_NumPolyobjs)
{
PolyNum += i;
moretodo = true;
}
}
if (!moretodo && sides != NULL)
{
for (i = 0; i < SIDEDEFSTEPSIZE && SideNum + i < numsides; ++i)
{
side_t *side = &sides[SideNum + i];
for(int j=0;j<3;j++) GC::Mark(side->textures[j].interpolation);
}
marked += i * sizeof(side_t);
if (SideNum + i < numsides)
{
SideNum += i;
moretodo = true;
}
}
// If there are more sectors to mark, put ourself back into the gray
// list.
if (moretodo)
{
Black2Gray();
GCNext = GC::Gray;
GC::Gray = this;
}
return marked;
}
//==========================================================================
//
// STAT gc
//
// Provides information about the current garbage collector state.
//
//==========================================================================
ADD_STAT(gc)
{
static const char *StateStrings[] = {
" Pause ",
"Propagate",
" Sweep ",
"Finalize " };
FString out;
out.Format("[%s] Alloc:%6zuK Thresh:%6zuK Est:%6zuK Steps: %d",
StateStrings[GC::State],
(GC::AllocBytes + 1023) >> 10,
(GC::Threshold + 1023) >> 10,
(GC::Estimate + 1023) >> 10,
GC::StepCount);
if (GC::State != GC::GCS_Pause)
{
out.AppendFormat(" %zuK", (GC::Dept + 1023) >> 10);
}
return out;
}
//==========================================================================
//
// CCMD gc
//
// Controls various aspects of the collector.
//
//==========================================================================
CCMD(gc)
{
if (argv.argc() == 1)
{
Printf ("Usage: gc stop|now|full|pause [size]|stepmul [size]\n");
return;
}
if (stricmp(argv[1], "stop") == 0)
{
GC::Threshold = ~(size_t)0 - 2;
}
else if (stricmp(argv[1], "now") == 0)
{
GC::Threshold = GC::AllocBytes;
}
else if (stricmp(argv[1], "full") == 0)
{
GC::FullGC();
}
else if (stricmp(argv[1], "pause") == 0)
{
if (argv.argc() == 2)
{
Printf ("Current GC pause is %d\n", GC::Pause);
}
else
{
GC::Pause = MAX(1,atoi(argv[2]));
}
}
else if (stricmp(argv[1], "stepmul") == 0)
{
if (argv.argc() == 2)
{
Printf ("Current GC stepmul is %d\n", GC::StepMul);
}
else
{
GC::StepMul = MAX(100, atoi(argv[2]));
}
}
}