🚀 go-pugleaf

Greetings.
I have installed a very simple memory manager to call winapi
alloc,re-alloc,free routines (Global**() apis).

When I install the mem mgr in WinMain(), after Application->Initialize().


The mgr. seems to be working ok.

The application that uses this cut-down mem mgr does multiple threading with
TThread objects.

Is the Global***() mem functions thread safe? Can 2 threads call the Global
fucntions at same time without worrying about screwing memory up?

In the context of the memory manager, is it correct to assume that the tmem
mgr usage by the vcl is thread safe?



Thanks for the assistance,
CurtC


------ Simple mem mgr code below:

static TMemoryManager mmNew;
static TMemoryManager mmOld;
void* __fastcall MyGetMem(int nbytes)
{
    HGLOBAL memptr = GlobalAlloc(GMEM_FIXED ,nbytes);
    return (void*)memptr;
}
void* __fastcall MyReallocMem(void *p, int nbytes)
{
    HGLOBAL memptr=GlobalReAlloc( p, nbytes, GMEM_ZEROINIT);
    return (void*)memptr;
}
int __fastcall MyFreeMem(void *p)
{
   if(p==NULL)return 0;
   if(GlobalFree(p)==NULL)
    return 0;
   return 1;
}
void SetMemMgr(void)
{
    mmNew.GetMem=MyGetMem;
    mmNew.FreeMem=MyFreeMem;
    mmNew.ReallocMem=MyReallocMem;
    GetMemoryManager(mmOld);
    SetMemoryManager(mmNew);
}

... WinMain(.....


            Application->Initialize();
SetMemMgr(); // SET NEW MEM MGR HERE......
            Application->CreateForm(__classid(TForm1), &Form1);