Telodendria/src/Memory.c

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/*
* Copyright (C) 2022 Jordan Bancino <@jordan:bancino.net>
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <Memory.h>
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
struct MemoryInfo
{
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size_t size;
const char *file;
int line;
MemoryInfo *next;
MemoryInfo *prev;
};
static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
static MemoryInfo *lastAllocation = NULL;
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static void (*hook) (MemoryAction, MemoryInfo *, void *) = NULL;
static void *hookArgs = NULL;
void *
MemoryAllocate(size_t size, const char *file, int line)
{
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MemoryInfo *a;
pthread_mutex_lock(&lock);
a = malloc(sizeof(MemoryInfo) + size);
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if (!a)
{
pthread_mutex_unlock(&lock);
return NULL;
}
a->size = sizeof(MemoryInfo) + size;
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a->file = file;
a->line = line;
a->next = NULL;
a->prev = lastAllocation;
if (lastAllocation)
{
lastAllocation->next = a;
}
lastAllocation = a;
if (hook)
{
hook(MEMORY_ALLOCATE, a, hookArgs);
}
pthread_mutex_unlock(&lock);
return MemoryInfoGetPointer(a);
}
void *
MemoryReallocate(void *p, size_t size)
{
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MemoryInfo *a;
void *new = NULL;
a = MemoryInfoGet(p);
if (!a)
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{
if (hook)
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{
hook(MEMORY_BAD_POINTER, NULL, hookArgs);
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}
pthread_mutex_unlock(&lock);
return NULL;
}
pthread_mutex_lock(&lock);
new = realloc(a, sizeof(MemoryInfo) + size);
if (!new)
{
pthread_mutex_unlock(&lock);
return NULL;
}
a = new;
a->size = sizeof(MemoryInfo) + size;
if (a->prev)
{
a->prev->next = a;
}
else
{
lastAllocation = a;
}
if (a->next)
{
a->next->prev = a;
}
else
{
lastAllocation = a;
}
if (hook)
{
hook(MEMORY_REALLOCATE, a, hookArgs);
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}
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pthread_mutex_unlock(&lock);
return MemoryInfoGetPointer(a);
}
void
MemoryFree(void *p)
{
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MemoryInfo *a;
pthread_mutex_lock(&lock);
a = MemoryInfoGet(p);
if (!a)
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{
if (hook)
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{
hook(MEMORY_BAD_POINTER, NULL, hookArgs);
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}
pthread_mutex_unlock(&lock);
return;
}
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if (a->prev)
{
a->prev->next = a->next;
}
else
{
lastAllocation = a->next;
}
if (a->next)
{
a->next->prev = a->prev;
}
else
{
lastAllocation = a->prev;
}
if (hook)
{
hook(MEMORY_FREE, a, hookArgs);
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}
free(a);
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pthread_mutex_unlock(&lock);
}
size_t
MemoryAllocated(void)
{
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MemoryInfo *a;
size_t total = 0;
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pthread_mutex_lock(&lock);
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a = lastAllocation;
while (a)
{
total += a->size;
a = a->prev;
}
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pthread_mutex_unlock(&lock);
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return total;
}
void
MemoryFreeAll(void)
{
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MemoryInfo *a;
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pthread_mutex_lock(&lock);
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a = lastAllocation;
while (a)
{
MemoryInfo *prev = a->prev;
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free(a);
a = prev;
}
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lastAllocation = NULL;
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pthread_mutex_unlock(&lock);
}
MemoryInfo *
MemoryInfoGet(void *p)
{
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MemoryInfo *a;
if (!p)
{
return NULL;
}
p = &(((MemoryInfo *) p)[-1]);
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a = lastAllocation;
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while (a)
{
if (a == p)
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{
break;
}
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a = a->prev;
}
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return a;
}
size_t
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MemoryInfoGetSize(MemoryInfo * a)
{
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if (!a)
{
return 0;
}
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return a->size;
}
const char *
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MemoryInfoGetFile(MemoryInfo * a)
{
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if (!a)
{
return NULL;
}
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return a->file;
}
int
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MemoryInfoGetLine(MemoryInfo * a)
{
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if (!a)
{
return -1;
}
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return a->line;
}
void *
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MemoryInfoGetPointer(MemoryInfo * a)
{
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if (!a)
{
return NULL;
}
return &(a[1]);
}
void
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MemoryIterate(void (*iterFunc) (MemoryInfo *, void *), void *args)
{
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MemoryInfo *a;
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pthread_mutex_lock(&lock);
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a = lastAllocation;
while (a)
{
iterFunc(a, args);
a = a->prev;
}
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pthread_mutex_unlock(&lock);
}
void
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MemoryHook(void (*memHook) (MemoryAction, MemoryInfo *, void *), void *args)
{
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pthread_mutex_lock(&lock);
hook = memHook;
hookArgs = args;
pthread_mutex_unlock(&lock);
}