99 lines
3.2 KiB
C++
99 lines
3.2 KiB
C++
// Filename: geomCacheManager.h
|
|
// Created by: drose (11Mar05)
|
|
//
|
|
////////////////////////////////////////////////////////////////////
|
|
//
|
|
// PANDA 3D SOFTWARE
|
|
// Copyright (c) Carnegie Mellon University. All rights reserved.
|
|
//
|
|
// All use of this software is subject to the terms of the revised BSD
|
|
// license. You should have received a copy of this license along
|
|
// with this source code in a file named "LICENSE."
|
|
//
|
|
////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef GEOMCACHEMANAGER_H
|
|
#define GEOMCACHEMANAGER_H
|
|
|
|
#include "pandabase.h"
|
|
#include "config_gobj.h"
|
|
#include "lightMutex.h"
|
|
#include "pStatCollector.h"
|
|
|
|
class GeomCacheEntry;
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Class : GeomCacheManager
|
|
// Description : This is used to keep track of, and limit the size of,
|
|
// the cache of munged vertices, which would otherwise
|
|
// be distributed through all of the GeomVertexData
|
|
// objects in the system.
|
|
//
|
|
// The actual data in the cache is not stored here, but
|
|
// rather it is distributed among the various
|
|
// GeomVertexData source objects. This allows the cache
|
|
// data to propagate through the multiprocess pipeline.
|
|
//
|
|
// This structure actually caches any of a number of
|
|
// different types of pointers, and mixes them all up in
|
|
// the same LRU cache list. Some of them (such as
|
|
// GeomMunger) are reference-counted here in the cache;
|
|
// most are not.
|
|
////////////////////////////////////////////////////////////////////
|
|
class EXPCL_PANDA_GOBJ GeomCacheManager {
|
|
protected:
|
|
GeomCacheManager();
|
|
~GeomCacheManager();
|
|
|
|
PUBLISHED:
|
|
INLINE void set_max_size(int max_size) const;
|
|
INLINE int get_max_size() const;
|
|
|
|
INLINE int get_total_size() const;
|
|
|
|
void flush();
|
|
|
|
static GeomCacheManager *get_global_ptr();
|
|
|
|
public:
|
|
INLINE void evict_old_entries();
|
|
void evict_old_entries(int max_size, bool keep_current);
|
|
INLINE static void flush_level();
|
|
|
|
private:
|
|
// This mutex protects all operations on this object, especially the
|
|
// linked-list operations.
|
|
LightMutex _lock;
|
|
|
|
int _total_size;
|
|
|
|
// We maintain a doubly-linked list to keep the cache entries in
|
|
// least-recently-used order: the items at the head of the list are
|
|
// ready to be flushed. We use our own doubly-linked list instead
|
|
// of an STL list, just so we can avoid a tiny bit of overhead,
|
|
// especially in keeping the pointer directly into the list from the
|
|
// calling objects.
|
|
|
|
// The tail and the head of the list are both kept by the _prev and
|
|
// _next pointers, respectively, within the following object, which
|
|
// always exists solely to keep a handle to the list. Keeping a
|
|
// token of the list this way avoids special cases for an empty
|
|
// list.
|
|
GeomCacheEntry *_list;
|
|
|
|
static GeomCacheManager *_global_ptr;
|
|
|
|
public:
|
|
static PStatCollector _geom_cache_size_pcollector;
|
|
static PStatCollector _geom_cache_active_pcollector;
|
|
static PStatCollector _geom_cache_record_pcollector;
|
|
static PStatCollector _geom_cache_erase_pcollector;
|
|
static PStatCollector _geom_cache_evict_pcollector;
|
|
|
|
friend class GeomCacheEntry;
|
|
};
|
|
|
|
#include "geomCacheManager.I"
|
|
|
|
#endif
|