zydronium/SBSPSS
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Browse source
This commit is contained in:
Paul 2000-09-15 16:51:09 +00:00
parent 260b8ab85e
commit 4e57518409
2 changed files with 97 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

65
source/mem/memory.cpp
View file

@ -18,6 +18,16 @@ void MemRemoveNode(sLList *LList,u_short Node);
sLList MainRam;
int MemNodeCount=0;
#define USE_MEM_GUARDS
#ifdef USE_MEM_GUARDS
static const unsigned int HEAD_GUARD_FILL_PATTERN =0x3c3c3c3c;
static const unsigned int MEM_FILL_PATTERN =0x3d3d3d3d;
static const unsigned int TAIL_GUARD_FILL_PATTERN =0x3e3e3e3e;
static const unsigned int MEM_GUARD_SIZE=sizeof(int)*2;
#endif /* USE_MEM_GUARDS */
/*****************************************************************************/
#ifdef __DEBUG_MEM__
@ -117,6 +127,8 @@ static FontBank s_debugFont;
void dumpDebugMem()
{
if (s_dumpMem)
@ -386,6 +398,9 @@ u32 Len = ((TLen + 3) & 0xfffffffc);
int BestNode,FirstNode;
Len += 4; //add on 4 to store Addr !
#ifdef USE_MEM_GUARDS
Len+=(MEM_GUARD_SIZE*2);
#endif /* USE_MEM_GUARDS */
// Find First (and possably only)
while (Head != 0xffff && mem->Nodes[ Head ].Len<Len) Head = mem->Nodes[ Head ].Next;
@ -411,8 +426,30 @@ int BestNode,FirstNode;
mem->Nodes[BestNode].Len -= Len;
mem->Nodes[BestNode].Addr += Len;
if (mem->Nodes[BestNode].Len == 0) MemRemoveNode( mem, BestNode);
*(u32*)Addr = Len;
Addr += 4;
#ifdef USE_MEM_GUARDS
unsigned int i;
for(i=0;i<MEM_GUARD_SIZE;i+=sizeof(int))
{
*(int*)(Addr+i)=HEAD_GUARD_FILL_PATTERN;
}
Addr+=MEM_GUARD_SIZE;
for(i=0;i<((TLen+3)&0xfffffffc);i+=sizeof(int))
{
*(int*)(Addr+i)=MEM_FILL_PATTERN;
}
for(i=0;i<MEM_GUARD_SIZE;i+=sizeof(int))
{
*(int*)(Addr+((TLen+3)&0xfffffffc)+i)=TAIL_GUARD_FILL_PATTERN;
}
#endif /* USE_MEM_GUARDS */
mem->RamUsed += Len;
}
@ -435,9 +472,35 @@ char *Addr = (char*)Address;
// If file from Databank, dont try and clear it (simple!!)
if (CFileIO::IsFromDataBank(Address)) return;
#ifdef USE_MEM_GUARDS
Addr-=MEM_GUARD_SIZE;
#endif /* USE_MEM_GUARDS */
Addr -= 4;
Len = *(u32*)Addr;
#ifdef USE_MEM_GUARDS
// Check that the guards are intact
unsigned int i;
unsigned int *guardAddr;
guardAddr=(unsigned int*)(Addr+4);
for(i=0;i<MEM_GUARD_SIZE;i+=sizeof(unsigned int),guardAddr++)
{
if(*guardAddr!=HEAD_GUARD_FILL_PATTERN)
{
ASSERT(!"Memory guard trashed (head)");
break;
}
}
guardAddr=(unsigned int*)(Addr+Len-MEM_GUARD_SIZE);
for(i=0;i<MEM_GUARD_SIZE;i+=sizeof(unsigned int),guardAddr++)
{
if(*guardAddr!=TAIL_GUARD_FILL_PATTERN)
{
ASSERT(!"Memory guard trashed (tail)");
break;
}
}
#endif /* USE_MEM_GUARDS */
mem->RamUsed -= Len;