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

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//----------------------------------------------------------------------------//
// GNU GPL OS/K //
// //
// Desc: Early and very dumb memory managment //
// //
// //
// Copyright © 2018-2019 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 <kernel/heap.h>
#include <extras/malloc.h>
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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)
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{
error_t rc;
size_t brk;
if (align == 0) align = M_DEFAULT_ALIGNMENT;
if (align < M_MINIMAL_ALIGNMENT) {
return EALIGN;
}
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MmLockHeap();
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brk = (size_t)_heap_start + MmGetHeapSize();
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req = _ALIGN_UP(req + brk, align) - brk;
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rc = MmGrowHeap(req);
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MmUnlockHeap();
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if (rc) {
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if ((flags & M_CANFAIL) != 0)
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return rc;
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KeStartPanic("KalAllocMemory: Out of memory");
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}
if (flags & M_ZEROED) {
memzero(*ptr, req);
}
*ptr = (void *)brk;
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assert(*ptr);
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return rc;
}
//
// Frees allocated memory
//
error_t KalFreeMemory(void *ptr)
{
(void)ptr;
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return EOK;
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}