historical/toontown-classic.git/panda/include/bamCacheIndex.h
2024-01-16 11:20:27 -06:00

91 lines
2.4 KiB
C++

/**
* 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."
*
* @file bamCacheIndex.h
* @author drose
* @date 2006-06-19
*/
#ifndef BAMCACHEINDEX_H
#define BAMCACHEINDEX_H
#include "pandabase.h"
#include "bamCacheRecord.h"
#include "pointerTo.h"
#include "filename.h"
#include "typedWritable.h"
#include "linkedListNode.h"
#include "pmap.h"
#include "pvector.h"
/**
* This represents the in-memory index that records the list of files stored
* in the BamCache. Since the memory is also flushed to disk from time to
* time, this class is a TypedWritable object.
*
* For the most part, this class is used only by the BamCache class.
*/
class EXPCL_PANDA_PUTIL BamCacheIndex : public TypedWritable, public LinkedListNode {
private:
INLINE BamCacheIndex();
~BamCacheIndex();
public:
void write(std::ostream &out, int indent_level = 0) const;
private:
void process_new_records();
void release_records();
PT(BamCacheRecord) evict_old_file();
bool add_record(BamCacheRecord *record);
bool remove_record(const Filename &source_pathname);
private:
typedef pmap<Filename, PT(BamCacheRecord) > Records;
Records _records;
std::streamsize _cache_size;
// This structure is a temporary container. It is only filled in while
// reading from a bam file.
typedef pvector< PT(BamCacheRecord) > RecordVector;
RecordVector _record_vector;
public:
static void register_with_read_factory();
virtual void write_datagram(BamWriter *manager, Datagram &dg);
protected:
static TypedWritable *make_from_bam(const FactoryParams &params);
virtual int complete_pointers(TypedWritable **plist, BamReader *manager);
void fillin(DatagramIterator &scan, BamReader *manager);
public:
static TypeHandle get_class_type() {
return _type_handle;
}
static void init_type() {
TypedWritable::init_type();
register_type(_type_handle, "BamCacheIndex",
TypedWritable::get_class_type());
}
virtual TypeHandle get_type() const {
return get_class_type();
}
virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
private:
static TypeHandle _type_handle;
friend class BamCache;
};
#include "bamCacheIndex.I"
#endif