telodendria/src/Memory.c

421 lines
8 KiB
C

/*
* 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>
#ifndef TELODENDRIA_MEMORY_TABLE_CHUNK
#define TELODENDRIA_MEMORY_TABLE_CHUNK 256
#endif
struct MemoryInfo
{
size_t size;
const char *file;
int line;
void *pointer;
};
static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
static void (*hook) (MemoryAction, MemoryInfo *, void *) = NULL;
static void *hookArgs = NULL;
static MemoryInfo **allocations = NULL;
static size_t allocationsSize = 0;
static size_t allocationsLen = 0;
static size_t
MemoryHash(void *p)
{
return (((size_t) p) >> 2 * 7) % allocationsSize;
}
static int
MemoryInsert(MemoryInfo * a)
{
size_t hash;
if (!allocations)
{
allocationsSize = TELODENDRIA_MEMORY_TABLE_CHUNK;
allocations = calloc(allocationsSize, sizeof(void *));
if (!allocations)
{
return 0;
}
}
/* If the next insertion would cause the table to be at least 3/4
* full, re-allocate and re-hash. */
if ((allocationsLen + 1) >= ((allocationsSize * 3) >> 2))
{
size_t i;
size_t tmpAllocationsSize = allocationsSize;
MemoryInfo **tmpAllocations;
allocationsSize += TELODENDRIA_MEMORY_TABLE_CHUNK;
tmpAllocations = calloc(allocationsSize, sizeof(void *));
if (!tmpAllocations)
{
return 0;
}
for (i = 0; i < tmpAllocationsSize; i++)
{
if (allocations[i])
{
hash = MemoryHash(allocations[i]->pointer);
while (tmpAllocations[hash])
{
hash = (hash + 1) % allocationsSize;
}
tmpAllocations[hash] = allocations[i];
}
}
free(allocations);
allocations = tmpAllocations;
}
hash = MemoryHash(a->pointer);
while (allocations[hash])
{
hash = (hash + 1) % allocationsSize;
}
allocations[hash] = a;
allocationsLen++;
return 1;
}
static void
MemoryDelete(MemoryInfo * a)
{
size_t hash = MemoryHash(a->pointer);
size_t count = 0;
while (count <= allocationsSize)
{
if (allocations[hash] && allocations[hash] == a)
{
allocations[hash] = NULL;
allocationsLen--;
return;
}
else
{
hash = (hash + 1) % allocationsSize;
count++;
}
}
}
void *
MemoryAllocate(size_t size, const char *file, int line)
{
void *p;
MemoryInfo *a;
pthread_mutex_lock(&lock);
p = malloc(size);
if (!p)
{
pthread_mutex_unlock(&lock);
return NULL;
}
a = malloc(sizeof(MemoryInfo));
if (!a)
{
free(p);
pthread_mutex_unlock(&lock);
return NULL;
}
a->size = size;
a->file = file;
a->line = line;
a->pointer = p;
if (!MemoryInsert(a))
{
free(a);
free(p);
pthread_mutex_unlock(&lock);
return NULL;
}
if (hook)
{
hook(MEMORY_ALLOCATE, a, hookArgs);
}
pthread_mutex_unlock(&lock);
return p;
}
void *
MemoryReallocate(void *p, size_t size, const char *file, int line)
{
MemoryInfo *a;
void *new = NULL;
if (!p)
{
return MemoryAllocate(size, file, line);
}
a = MemoryInfoGet(p);
if (a)
{
pthread_mutex_lock(&lock);
new = realloc(a->pointer, size);
if (new)
{
MemoryDelete(a);
a->size = size;
a->file = file;
a->line = line;
a->pointer = new;
MemoryInsert(a);
if (hook)
{
hook(MEMORY_REALLOCATE, a, hookArgs);
}
}
pthread_mutex_unlock(&lock);
}
else if (hook)
{
a = malloc(sizeof(MemoryInfo));
if (a)
{
a->size = 0;
a->file = file;
a->line = line;
a->pointer = p;
hook(MEMORY_BAD_POINTER, a, hookArgs);
free(a);
}
}
return new;
}
void
MemoryFree(void *p, const char *file, int line)
{
MemoryInfo *a;
if (!p)
{
return;
}
a = MemoryInfoGet(p);
if (a)
{
pthread_mutex_lock(&lock);
if (hook)
{
a->file = file;
a->line = line;
hook(MEMORY_FREE, a, hookArgs);
}
MemoryDelete(a);
free(a->pointer);
free(a);
pthread_mutex_unlock(&lock);
}
else if (hook)
{
a = malloc(sizeof(MemoryInfo));
if (a)
{
a->file = file;
a->line = line;
a->size = 0;
a->pointer = p;
hook(MEMORY_BAD_POINTER, a, hookArgs);
free(a);
}
}
}
size_t
MemoryAllocated(void)
{
size_t i;
size_t total = 0;
pthread_mutex_lock(&lock);
for (i = 0; i < allocationsSize; i++)
{
if (allocations[i])
{
total += allocations[i]->size;
}
}
pthread_mutex_unlock(&lock);
return total;
}
void
MemoryFreeAll(void)
{
size_t i;
pthread_mutex_lock(&lock);
for (i = 0; i < allocationsSize; i++)
{
if (allocations[i])
{
free(allocations[i]->pointer);
free(allocations[i]);
}
}
free(allocations);
allocations = NULL;
allocationsSize = 0;
allocationsLen = 0;
pthread_mutex_unlock(&lock);
}
MemoryInfo *
MemoryInfoGet(void *p)
{
size_t hash, count;
pthread_mutex_lock(&lock);
hash = MemoryHash(p);
count = 0;
while (count <= allocationsSize)
{
if (!allocations[hash] || allocations[hash]->pointer != p)
{
hash = (hash + 1) % allocationsSize;
count++;
}
else
{
pthread_mutex_unlock(&lock);
return allocations[hash];
}
}
pthread_mutex_unlock(&lock);
return NULL;
}
size_t
MemoryInfoGetSize(MemoryInfo * a)
{
if (!a)
{
return 0;
}
return a->size;
}
const char *
MemoryInfoGetFile(MemoryInfo * a)
{
if (!a)
{
return NULL;
}
return a->file;
}
int
MemoryInfoGetLine(MemoryInfo * a)
{
if (!a)
{
return -1;
}
return a->line;
}
void *
MemoryInfoGetPointer(MemoryInfo * a)
{
if (!a)
{
return NULL;
}
return a->pointer;
}
void
MemoryIterate(void (*iterFunc) (MemoryInfo *, void *), void *args)
{
size_t i;
pthread_mutex_lock(&lock);
for (i = 0; i < allocationsSize; i++)
{
if (allocations[i])
{
iterFunc(allocations[i], args);
}
}
pthread_mutex_unlock(&lock);
}
void
MemoryHook(void (*memHook) (MemoryAction, MemoryInfo *, void *), void *args)
{
pthread_mutex_lock(&lock);
hook = memHook;
hookArgs = args;
pthread_mutex_unlock(&lock);
}