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/*
* Copyright (c) 2017 Cisco and/or its affiliates.
* 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 <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/errno.h>
#include <stdbool.h>
#include <string.h>
#include <strings.h>
#include <pthread.h>
#include <parc/assert/parc_Assert.h>
#include <parc/algol/parc_StdlibMemory.h>
static uint32_t _parcStdlibMemory_OutstandingAllocations;
#ifdef PARCLibrary_DISABLE_ATOMICS
static pthread_mutex_t _parcStdlibMemory_Mutex = PTHREAD_MUTEX_INITIALIZER;
static inline void
_parcStdlibMemory_IncrementOutstandingAllocations(void)
{
pthread_mutex_lock(&_parcStdlibMemory_Mutex);
_parcStdlibMemory_OutstandingAllocations++;
pthread_mutex_unlock(&_parcStdlibMemory_Mutex);
}
static inline void
_parcStdlibMemory_DecrementOutstandingAllocations(void)
{
pthread_mutex_lock(&_parcStdlibMemory_Mutex);
_parcStdlibMemory_OutstandingAllocations--;
pthread_mutex_unlock(&_parcStdlibMemory_Mutex);
}
#else
static inline void
_parcStdlibMemory_IncrementOutstandingAllocations(void)
{
__sync_add_and_fetch(&_parcStdlibMemory_OutstandingAllocations, 1);
}
static inline void
_parcStdlibMemory_DecrementOutstandingAllocations(void)
{
__sync_sub_and_fetch(&_parcStdlibMemory_OutstandingAllocations, 1);
}
#endif
#ifndef HAVE_REALLOC
static void *
_parcStdlibMemory_rplRealloc(void *oldAlloc, size_t newSize)
{
if (newSize == 0) {
newSize = 1;
}
char *newAlloc = malloc(newSize);
if (oldAlloc != NULL) {
memcpy(newAlloc, oldAlloc, newSize);
free(oldAlloc);
}
return newAlloc;
}
#endif
void *
parcStdlibMemory_Allocate(size_t size)
{
if (size == 0) {
return NULL;
}
void *result = malloc(size);
if (result != NULL) {
_parcStdlibMemory_IncrementOutstandingAllocations();
}
return result;
}
void *
parcStdlibMemory_AllocateAndClear(size_t size)
{
void *pointer = parcStdlibMemory_Allocate(size);
if (pointer != NULL) {
memset(pointer, 0, size);
}
return pointer;
}
int
parcStdlibMemory_MemAlign(void **pointer, size_t alignment, size_t size)
{
if (size == 0) {
return EINVAL;
}
int failure = posix_memalign(pointer, alignment, size);
if (failure != 0) {
return failure;
}
if (*pointer == NULL) {
return ENOMEM;
}
_parcStdlibMemory_IncrementOutstandingAllocations();
return 0;
}
void
parcStdlibMemory_Deallocate(void **pointer)
{
#ifndef PARCLibrary_DISABLE_VALIDATION
parcTrapIllegalValueIf(_parcStdlibMemory_OutstandingAllocations == 0,
"parcStdlibMemory_Deallocate invoked with nothing left to free (double free somewhere?)\n");
#endif
free(*pointer);
*pointer = NULL;
_parcStdlibMemory_DecrementOutstandingAllocations();
}
void *
parcStdlibMemory_Reallocate(void *pointer, size_t newSize)
{
#ifdef HAVE_REALLOC
void *result = realloc(pointer, newSize);
#else
void *result = _parcStdlibMemory_rplRealloc(pointer, newSize);
#endif
if (pointer == NULL) {
_parcStdlibMemory_IncrementOutstandingAllocations();
}
return result;
}
char *
parcStdlibMemory_StringDuplicate(const char *string, size_t length)
{
_parcStdlibMemory_IncrementOutstandingAllocations();
return strndup(string, length);
}
uint32_t
parcStdlibMemory_Outstanding(void)
{
return _parcStdlibMemory_OutstandingAllocations;
}
PARCMemoryInterface PARCStdlibMemoryAsPARCMemory = {
.Allocate = (uintptr_t) parcStdlibMemory_Allocate,
.AllocateAndClear = (uintptr_t) parcStdlibMemory_AllocateAndClear,
.MemAlign = (uintptr_t) parcStdlibMemory_MemAlign,
.Deallocate = (uintptr_t) parcStdlibMemory_Deallocate,
.Reallocate = (uintptr_t) parcStdlibMemory_Reallocate,
.StringDuplicate = (uintptr_t) parcStdlibMemory_StringDuplicate,
.Outstanding = (uintptr_t) parcStdlibMemory_Outstanding
};
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