OVMS3/OVMS.V3/components/wolfssl/IDE/ECLIPSE/DEOS/deos_malloc.c

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/* deos_malloc.c
*
* Copyright (C) 2006-2020 wolfSSL Inc.
*
* This file is part of wolfSSL.
*
* wolfSSL 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 2 of the License, or
* (at your option) any later version.
*
* wolfSSL 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
*/
#include <wolfssl/wolfcrypt/settings.h>
#include <wolfssl/ssl.h>
#define ROUND_UP(x, align) (((int) (x) + (align - 1)) & ~(align - 1))
#define SIZEOF_HEADER sizeof(size_t) /* tracks size of allocated block */
#define HEAP_SIZE_MAX (1*1024*1024)
static size_t allocatedMemory = 0;
size_t getMemAllocatedSize_deos(size_t* size){
if (size)
*size = allocatedMemory;
return allocatedMemory;
}
/* Simply returns without freeing any memory. */
void free_deos(void *ptr) {
//printf("fake free_deos()\n");
return;
}
void *realloc_deos(void *ptr, size_t size) {
void *newptr;
if (size == 0)
return ptr;
newptr = malloc_deos(size);
if (ptr != NULL && newptr != NULL) {
if ( *((char *)ptr - SIZEOF_HEADER) < *((char *)newptr - SIZEOF_HEADER))
size = *((char *)ptr - SIZEOF_HEADER);
XMEMCPY((char *) newptr, (const char *) ptr, size);
free_deos(ptr);
}
return newptr;
}
void *malloc_deos(size_t size) {
PDEOS_SYSTEM_INFO systemInfoPtr;
static VirtualAddressTYP heapAddr = NULL;
static VirtualAddressTYP freeAddr = NULL;
VirtualAddressTYP retAddr = NULL;
DWORD allocationSize = 0;
static int initialized = 0;
if (size <= 0)
return NULL;
if (!initialized) {
systemInfoPtr = (PDEOS_SYSTEM_INFO)getSystemInfoDEOS();
freeAddr = (VirtualAddressTYP)getNextLibraryStartAddress();
allocationSize = (((HEAP_SIZE_MAX - 1) / systemInfoPtr->dwPageSize) + 1) *
systemInfoPtr->dwPageSize;
if (virtualAllocDEOS(freeAddr, allocationSize) != allocSuccess){
printf("ERROR: virtualAllocDEOS failed\n");
return NULL;
}
setNextLibraryStartAddress(freeAddr + allocationSize);
heapAddr = freeAddr;
initialized = 1;
}
size = ROUND_UP(size, sizeof(size_t));
if ((size + SIZEOF_HEADER) > (HEAP_SIZE_MAX - (freeAddr - heapAddr))){
printf("ERROR: malloc_deos cannot allocate from heap memory anymore\n");
return NULL;
}
*freeAddr = size;
freeAddr += SIZEOF_HEADER;
retAddr = freeAddr;
XMEMSET(retAddr, 0, size);
freeAddr += size;
allocatedMemory += size;
return retAddr;
}