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/*
* Copyright (C) 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "chpp/memory.h"
#include <stdatomic.h>
#include <stddef.h>
#include <stdlib.h>
#ifdef CHPP_LINUX_MEMORY_DEBUG
#include "chpp/log.h"
#endif // CHPP_LINUX_MEMORY_DEBUG
#include "chpp/macros.h"
#include "chpp/platform/utils.h"
//! A header used to track the amount of allocated memory.
struct ChppAllocHeader {
size_t bytes;
};
static atomic_size_t gTotalAllocBytes = 0;
void *chppMalloc(const size_t size) {
void *ptr = NULL;
if (size != 0) {
ptr = malloc(sizeof(struct ChppAllocHeader) + size);
if (ptr != NULL) {
struct ChppAllocHeader *header = (struct ChppAllocHeader *)ptr;
header->bytes = size;
header++;
ptr = header;
gTotalAllocBytes += size;
}
}
#ifdef CHPP_LINUX_MEMORY_DEBUG
CHPP_LOGI("%s: size %zu total (after malloc) %zu", __func__, size,
gTotalAllocBytes);
#endif // CHPP_LINUX_MEMORY_DEBUG
return ptr;
}
void chppFree(void *ptr) {
if (ptr != NULL) {
struct ChppAllocHeader *header = (struct ChppAllocHeader *)ptr;
header--;
size_t size = header->bytes;
gTotalAllocBytes -= size;
#ifdef CHPP_LINUX_MEMORY_DEBUG
CHPP_LOGI("%s: size %zu total (after free) %zu", __func__, size,
gTotalAllocBytes);
#endif // CHPP_LINUX_MEMORY_DEBUG
free(header);
}
}
void *chppRealloc(void *oldPtr, const size_t newSize, const size_t oldSize) {
UNUSED_VAR(oldSize);
void *ptr = NULL;
if (newSize != oldSize) {
struct ChppAllocHeader *oldHeader = (struct ChppAllocHeader *)oldPtr;
oldHeader--;
void *reallocPtr =
realloc(oldHeader, newSize + sizeof(struct ChppAllocHeader));
if (reallocPtr != NULL) {
struct ChppAllocHeader *newHeader = (struct ChppAllocHeader *)reallocPtr;
newHeader->bytes = newSize;
newHeader++;
ptr = newHeader;
if (newSize > oldSize) {
gTotalAllocBytes += (newSize - oldSize);
} else {
gTotalAllocBytes -= (oldSize - newSize);
}
}
}
#ifdef CHPP_LINUX_MEMORY_DEBUG
CHPP_LOGI("%s: size %zu total (after realloc) %zu", __func__, newSize,
gTotalAllocBytes);
#endif // CHPP_LINUX_MEMORY_DEBUG
return ptr;
}
void chppClearTotalAllocBytes() {
gTotalAllocBytes = 0;
}
size_t chppGetTotalAllocBytes() {
return gTotalAllocBytes;
}
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