mirror of
https://github.com/libretro/ppsspp.git
synced 2024-12-14 20:48:30 +00:00
98 lines
2.5 KiB
C++
98 lines
2.5 KiB
C++
// Copyright (c) 2012- PPSSPP Project.
|
|
|
|
// 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, version 2.0 or later versions.
|
|
|
|
// 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 2.0 for more details.
|
|
|
|
// A copy of the GPL 2.0 should have been included with the program.
|
|
// If not, see http://www.gnu.org/licenses/
|
|
|
|
// Official git repository and contact information can be found at
|
|
// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
|
|
|
|
#pragma once
|
|
|
|
#include "../../Globals.h"
|
|
|
|
class PointerWrap;
|
|
|
|
// Generic allocator thingy. Allocates blocks from a range.
|
|
|
|
class BlockAllocator
|
|
{
|
|
public:
|
|
BlockAllocator(int grain = 16); // 16 byte granularity by default.
|
|
~BlockAllocator();
|
|
|
|
void Init(u32 _rangeStart, u32 _rangeSize);
|
|
void Shutdown();
|
|
|
|
void ListBlocks() const;
|
|
|
|
// WARNING: size can be modified upwards!
|
|
u32 Alloc(u32 &size, bool fromTop = false, const char *tag = 0);
|
|
u32 AllocAligned(u32 &size, u32 sizeGrain, u32 grain, bool fromTop = false, const char *tag = 0);
|
|
u32 AllocAt(u32 position, u32 size, const char *tag = 0);
|
|
|
|
bool Free(u32 position);
|
|
bool FreeExact(u32 position);
|
|
bool IsBlockFree(u32 position) {
|
|
Block *b = GetBlockFromAddress(position);
|
|
if (b)
|
|
return !b->taken;
|
|
else
|
|
return false;
|
|
}
|
|
|
|
u32 GetBlockStartFromAddress(u32 addr) const;
|
|
u32 GetBlockSizeFromAddress(u32 addr) const;
|
|
u32 GetLargestFreeBlockSize() const;
|
|
u32 GetTotalFreeBytes() const;
|
|
|
|
void DoState(PointerWrap &p);
|
|
|
|
private:
|
|
void CheckBlocks() const;
|
|
|
|
struct Block
|
|
{
|
|
Block(u32 _start, u32 _size, bool _taken, Block *_prev, Block *_next)
|
|
: start(_start), size(_size), taken(_taken), prev(_prev), next(_next)
|
|
{
|
|
strcpy(tag, "(untitled)");
|
|
}
|
|
void SetTag(const char *_tag) {
|
|
if (_tag)
|
|
strncpy(tag, _tag, 32);
|
|
else
|
|
strncpy(tag, "---", 32);
|
|
tag[31] = 0;
|
|
}
|
|
void DoState(PointerWrap &p);
|
|
u32 start;
|
|
u32 size;
|
|
bool taken;
|
|
char tag[32];
|
|
Block *prev;
|
|
Block *next;
|
|
};
|
|
|
|
Block *bottom_;
|
|
Block *top_;
|
|
u32 rangeStart_;
|
|
u32 rangeSize_;
|
|
|
|
u32 grain_;
|
|
|
|
void MergeFreeBlocks(Block *fromBlock);
|
|
Block *GetBlockFromAddress(u32 addr);
|
|
const Block *GetBlockFromAddress(u32 addr) const;
|
|
Block *InsertFreeBefore(Block *b, u32 start, u32 size);
|
|
Block *InsertFreeAfter(Block *b, u32 start, u32 size);
|
|
};
|