os-k/kaleid/kernel/mm/malloc.c

81 lines
2.8 KiB
C

//----------------------------------------------------------------------------//
// OS on Kaleid //
// //
// Desc: Early and very dumb memory managment //
// //
// //
// Copyright © 2018-2021 The OS/K Team //
// //
// This file is part of OS/K. //
// //
// OS/K 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 3 of the License, or //
// any later version. //
// //
// OS/K 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 OS/K. If not, see <https://www.gnu.org/licenses/>. //
//----------------------------------------------------------------------------//
#include <mm/heap.h>
#include <ex/malloc.h>
error_t KalAllocMemory(void **ptr, size_t req)
{
return KalAllocMemoryEx(ptr, req, 0, 0);
}
error_t KalAllocMemoryEx(void **ptr, size_t req, int flags, size_t align)
{
error_t rc;
size_t brk;
if (align == 0) align = M_DEFAULT_ALIGNMENT;
if (align < M_MINIMAL_ALIGNMENT) {
return EALIGN;
}
MmLockHeap();
brk = (size_t)_heap_start + MmGetHeapSize();
req = _ALIGN_UP(req + brk, align) - brk;
/* DebugLog("MALLOC: start=%p, size=%lx, brk=%p, req=%lx\n", */
/* _heap_start, MmGetHeapSize(), brk, req); */
rc = MmGrowHeap(req);
MmUnlockHeap();
if (rc) {
if ((flags & M_CANFAIL) != 0)
return rc;
KeStartPanic("KalAllocMemory: Out of memory");
}
*ptr = (void *)_ALIGN_UP(brk, align);
if (flags & M_ZEROED) {
memzero(*ptr, req);
}
assert(*ptr);
return rc;
}
//
// Frees allocated memory
//
error_t KalFreeMemory(void *ptr)
{
(void)ptr;
return EOK;
}