79 lines
2.7 KiB
C
79 lines
2.7 KiB
C
//----------------------------------------------------------------------------//
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// GNU GPL OS/K //
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// //
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// Desc: Early and very dumb memory managment //
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// //
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// //
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// Copyright © 2018-2019 The OS/K Team //
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// //
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// This file is part of OS/K. //
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// //
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// OS/K is free software: you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation, either version 3 of the License, or //
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// any later version. //
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// //
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// OS/K is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY//without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with OS/K. If not, see <https://www.gnu.org/licenses/>. //
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//----------------------------------------------------------------------------//
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#include <kernel/heap.h>
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#include <extras/malloc.h>
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error_t KalAllocMemory(void **ptr, size_t req)
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{
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return KalAllocMemoryEx(ptr, req, 0, 0);
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}
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error_t KalAllocMemoryEx(void **ptr, size_t req, int flags, size_t align)
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{
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error_t rc;
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size_t brk;
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extern void *_heap_start;
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if (align == 0) align = M_DEFAULT_ALIGNMENT;
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if (align < M_MINIMAL_ALIGNMENT) {
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return EALIGN;
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}
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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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}
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if (flags & M_ZEROED) {
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memzero(*ptr, req);
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}
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*ptr = (void *)brk;
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assert(*ptr);
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return rc;
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}
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//
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// Frees allocated memory
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//
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error_t KalFreeMemory(void *ptr)
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{
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(void)ptr;
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return EOK;
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}
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