102 lines
3.1 KiB
C
102 lines
3.1 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 vertexDataBuffer.h
|
||
|
|
* @author drose
|
||
|
|
* @date 2007-05-14
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef VERTEXDATABUFFER_H
|
||
|
|
#define VERTEXDATABUFFER_H
|
||
|
|
|
||
|
|
#include "pandabase.h"
|
||
|
|
#include "vertexDataBook.h"
|
||
|
|
#include "vertexDataBlock.h"
|
||
|
|
#include "pointerTo.h"
|
||
|
|
#include "virtualFile.h"
|
||
|
|
#include "pStatCollector.h"
|
||
|
|
#include "lightMutex.h"
|
||
|
|
#include "lightMutexHolder.h"
|
||
|
|
|
||
|
|
/**
|
||
|
|
* A block of bytes that stores the actual raw vertex data referenced by a
|
||
|
|
* GeomVertexArrayData object.
|
||
|
|
*
|
||
|
|
* At any point, a buffer may be in any of two states:
|
||
|
|
*
|
||
|
|
* independent - the buffer's memory is resident, and owned by the
|
||
|
|
* VertexDataBuffer object itself (in _resident_data). In this state,
|
||
|
|
* _reserved_size might be greater than or equal to _size.
|
||
|
|
*
|
||
|
|
* paged - the buffer's memory is owned by a VertexDataBlock. That block
|
||
|
|
* might itself be resident, compressed, or paged to disk. If it is resident,
|
||
|
|
* the memory may still be accessed directly from the block. However, this
|
||
|
|
* memory is considered read-only. In this state, _reserved_size will always
|
||
|
|
* equal _size.
|
||
|
|
*
|
||
|
|
* VertexDataBuffers start out in independent state. They get moved to paged
|
||
|
|
* state when their owning GeomVertexArrayData objects get evicted from the
|
||
|
|
* _independent_lru. They can get moved back to independent state if they are
|
||
|
|
* modified (e.g. get_write_pointer() or realloc() is called).
|
||
|
|
*
|
||
|
|
* The idea is to keep the highly dynamic and frequently-modified
|
||
|
|
* VertexDataBuffers resident in easy-to-access memory, while collecting the
|
||
|
|
* static and rarely accessed VertexDataBuffers together onto pages, where
|
||
|
|
* they may be written to disk as a block when necessary.
|
||
|
|
*/
|
||
|
|
class EXPCL_PANDA_GOBJ VertexDataBuffer {
|
||
|
|
public:
|
||
|
|
INLINE VertexDataBuffer();
|
||
|
|
INLINE VertexDataBuffer(size_t size);
|
||
|
|
INLINE VertexDataBuffer(const VertexDataBuffer ©);
|
||
|
|
void operator = (const VertexDataBuffer ©);
|
||
|
|
INLINE ~VertexDataBuffer();
|
||
|
|
|
||
|
|
INLINE const unsigned char *get_read_pointer(bool force) const RETURNS_ALIGNED(MEMORY_HOOK_ALIGNMENT);
|
||
|
|
INLINE unsigned char *get_write_pointer() RETURNS_ALIGNED(MEMORY_HOOK_ALIGNMENT);
|
||
|
|
|
||
|
|
INLINE size_t get_size() const;
|
||
|
|
INLINE size_t get_reserved_size() const;
|
||
|
|
INLINE void set_size(size_t size);
|
||
|
|
INLINE void clean_realloc(size_t reserved_size);
|
||
|
|
INLINE void unclean_realloc(size_t reserved_size);
|
||
|
|
INLINE void clear();
|
||
|
|
|
||
|
|
INLINE void page_out(VertexDataBook &book);
|
||
|
|
|
||
|
|
void swap(VertexDataBuffer &other);
|
||
|
|
|
||
|
|
private:
|
||
|
|
void do_clean_realloc(size_t size);
|
||
|
|
void do_unclean_realloc(size_t size);
|
||
|
|
|
||
|
|
void do_page_out(VertexDataBook &book);
|
||
|
|
void do_page_in();
|
||
|
|
|
||
|
|
unsigned char *_resident_data;
|
||
|
|
size_t _size;
|
||
|
|
size_t _reserved_size;
|
||
|
|
PT(VertexDataBlock) _block;
|
||
|
|
LightMutex _lock;
|
||
|
|
|
||
|
|
public:
|
||
|
|
static TypeHandle get_class_type() {
|
||
|
|
return _type_handle;
|
||
|
|
}
|
||
|
|
static void init_type() {
|
||
|
|
register_type(_type_handle, "VertexDataBuffer");
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
static TypeHandle _type_handle;
|
||
|
|
};
|
||
|
|
|
||
|
|
#include "vertexDataBuffer.I"
|
||
|
|
|
||
|
|
#endif
|