kolibrios/programs/demos/life2/include/kos_heap.h
IgorA 97d7b5c34a clean code
git-svn-id: svn://kolibrios.org@8170 a494cfbc-eb01-0410-851d-a64ba20cac60
2020-11-10 12:19:15 +00:00

91 lines
2.3 KiB
C++

#ifndef __KOLIBRI_HEAP_H_INCLUDED_
#define __KOLIBRI_HEAP_H_INCLUDED_
#include <kolibri.h>
#include <memheap.h>
// Kolibri memory heap interface.
namespace Kolibri // All kolibri functions, types and data are nested in the (Kolibri) namespace.
{
void *Alloc(unsigned int size);
void *ReAlloc(void *mem, unsigned int size);
void Free(void *mem);
}
#ifdef __KOLIBRI__
namespace Kolibri
{
// Global variables
MemoryHeap::TFreeSpace _KolibriFreeSpace;
MemoryHeap::TMemBlock _KolibriMemBlock;
TMutex _MemHeapMutex = KOLIBRI_MUTEX_INIT;
// Functions
void *_HeapInit(void *begin, void *use_end, void *end)
{
MemoryHeap::InitFreeSpace(_KolibriFreeSpace);
_KolibriMemBlock = MemoryHeap::CreateBlock(begin, end, _KolibriFreeSpace);
unsigned int use_beg = (unsigned int)MemoryHeap::BlockBegin(_KolibriMemBlock) +
MemoryHeap::BlockAddSize - MemoryHeap::BlockEndSize;
unsigned int use_size = (unsigned int)use_end;
if (use_size <= use_beg) return 0;
else use_size -= use_beg;
return MemoryHeap::Alloc(_KolibriFreeSpace, use_size);
}
bool _SetUseMemory(unsigned int use_mem);
int _RecalculateUseMemory(unsigned int use_mem);
void *Alloc(unsigned int size)
{
if (!size) return 0;
Lock(&_MemHeapMutex);
void *res = MemoryHeap::Alloc(_KolibriFreeSpace, size);
if (!res)
{
unsigned use_mem = (unsigned int)MemoryHeap::BlockEndFor(_KolibriMemBlock, size);
if (_SetUseMemory(_RecalculateUseMemory(use_mem)))
{
res = MemoryHeap::Alloc(_KolibriFreeSpace, size);
}
}
UnLock(&_MemHeapMutex);
return res;
}
void *ReAlloc(void *mem, unsigned int size)
{
Lock(&_MemHeapMutex);
void *res = MemoryHeap::ReAlloc(_KolibriFreeSpace, mem, size);
if (!res && size)
{
unsigned use_mem = (unsigned int)MemoryHeap::BlockEndFor(_KolibriMemBlock, size);
if (_SetUseMemory(_RecalculateUseMemory(use_mem)))
{
res = MemoryHeap::ReAlloc(_KolibriFreeSpace, mem, size);
}
}
UnLock(&_MemHeapMutex);
return res;
}
void Free(void *mem)
{
Lock(&_MemHeapMutex);
MemoryHeap::Free(_KolibriFreeSpace, mem);
UnLock(&_MemHeapMutex);
}
void _FreeAndThreadFinish(void *mem, int *exit_proc_now);
}
#endif // def __KOLIBRI__
#endif // ndef __KOLIBRI_HEAP_H_INCLUDED_