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/*
This file is part of the Boson game
Copyright (C) 2004 Andreas Beckermann (b_mann@gmx.de)
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; either version 2 of the License, or
(at your option) any later version.
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 for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "memorymanager.h"
#include "memnode.h"
#include <stdlib.h>
#include <string.h>
#include <qstring.h>
#include <qptrdict.h>
//#define TOO_MUCH_DEBUGGING
#ifndef __GLIBC__
#error __GLIBC__ is not defined - we need glibc (for __libc_malloc)
#endif
#define libc_malloc __libc_malloc
#define libc_free __libc_free
extern "C" {
void* __libc_malloc(size_t);
void __libc_free(void*);
}
// AB: see dmalloc/return.h
#ifdef __i386
#ifdef __GNUC__
#define GET_RET_ADDR(file) asm("movl 4(%%ebp),%%eax ; movl %%eax,%0" : \
"=g" (file) : \
: \
"eax")
#endif // __GNUC__
#endif // __i386
// testing
#undef GET_RET_ADDR
#ifndef GET_RET_ADDR
#endif // !GET_RET_ADDR
int MemoryManager::mDisabled = 0;
MemoryManager* MemoryManager::mManager= 0;
class MemoryManagerPrivate
{
public:
MemoryManagerPrivate()
{
}
QPtrDict<MemNode> mMemoryInfo;
unsigned long int mMemory;
};
MemoryManager::MemoryManager()
{
mDisabled++;
d = new MemoryManagerPrivate();
d->mMemoryInfo.setAutoDelete(true);
d->mMemoryInfo.resize(106487); // we might require even bigger numbers here
d->mMemory = 0;
mDisabled--;
}
MemoryManager::~MemoryManager()
{
mDisabled++;
d->mMemoryInfo.clear();
delete d;
mDisabled--;
}
void* MemoryManager::bomalloc(size_t size, const char* file, int line, const char* function, bool isMalloc)
{
if (mDisabled) {
// the memory manager also allocates memory, but we dont want to track
// that (to avoid infinite recursion)
#ifdef TOO_MUCH_DEBUGGING
printf("bomalloc: %d %p line=%d %p %d\n", size, file, line, function, isMalloc ? 1 : 0);
printf("bomalloc() done (disabled)\n");
#endif
return libc_malloc(size);
}
mDisabled++;
#ifdef TOO_MUCH_DEBUGGING
printf("bomalloc: %d %p line=%d %p %d\n", size, file, line, function, isMalloc ? 1 : 0);
#endif
void* p = libc_malloc(size);
MemNode* node = (MemNode*)libc_malloc(sizeof(struct MemNode));
makeMemNode(node, size, p, file, line, function, isMalloc);
d->mMemoryInfo.insert(p, node);
d->mMemory += size;
mDisabled--;
#ifdef TOO_MUCH_DEBUGGING
printf("bomalloc() done\n");
#endif
return p;
}
void MemoryManager::bofree(void* p, bool isFree)
{
if (!p) {
return;
}
#ifdef TOO_MUCH_DEBUGGING
printf("bofree()\n");
#endif
if (mDisabled) {
libc_free(p);
#ifdef TOO_MUCH_DEBUGGING
printf("bofree() done\n");
#endif
return;
}
mDisabled++;
MemNode* node = d->mMemoryInfo.take(p);
if (!node) {
printf("ERROR (bofree): deleting memory that is unkown to the MemoryManager: %p\n", p);
mDisabled --;
} else {
d->mMemory -= node->mSize;
if (node->mIsMalloc != isFree) {
printf("ERROR (bofree): isMalloc != isFree\n");
}
}
libc_free(node);
libc_free(p);
mDisabled--;
#ifdef TOO_MUCH_DEBUGGING
printf("bofree() done\n");
#endif
}
const QPtrDict<MemNode>& MemoryManager::allNodes() const
{
return d->mMemoryInfo;
}
unsigned long int MemoryManager::memoryInUse() const
{
return d->mMemory;
}
void MemoryManager::disable()
{
mDisabled++;
}
void MemoryManager::enable()
{
mDisabled--;
if (mDisabled < 0) {
printf("ERROR (enable()): invalid use of enable()/disable() !\n");
}
}
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