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/*
* Copyright (c) International Business Machines Corp., 2014
*
* This program 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.
*
* This program 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <unistd.h>
#include <stdlib.h>
#include <malloc.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include "assert.h"
#include "misc.h"
#include "slab.h"
#include "heap.h"
#include "bb_trace.h"
#include "memory_leak_detection.h"
/* ======================================================================= */
static const char *__heap_msg[] = {
"heap: unexpected NULL pointer"
"heap: unexpected cache and/or alloc size",
"heap: unexpected alloc size",
};
#define HEAP_NULL (__heap_msg[0])
#define HEAP_SIZE (__heap_msg[1])
#define HEAP_ALLOC (__heap_msg[2])
/* ======================================================================= */
void heap_dump(heap_t * self, FILE * out)
{
if (self == NULL)
return;
size_t i;
fprintf(out,
"*******************************************************************\n");
for (i = 0; i < self->slab_size; i++)
if (self->slab[i] != NULL)
slab_dump(self->slab[i], out);
fprintf(out,
"*******************************************************************\n");
}
heap_t *__heap_new(size_t alloc_size, size_t page_size, const char *file,
int line)
{
alloc_size = max(__round_pow2(alloc_size), CACHE_ALLOC_MIN);
page_size = max(__round_pow2(page_size), CACHE_SIZE_MIN);
if (alloc_size < CACHE_ALLOC_MIN || CACHE_ALLOC_MAX < alloc_size)
throw_unexpected(HEAP_SIZE);
if (page_size < CACHE_SIZE_MIN || CACHE_SIZE_MAX < page_size)
throw_unexpected(HEAP_SIZE);
heap_t *self = (heap_t *) MALLOC(sizeof(*self) +
sizeof(*self->slab) * page_size /
alloc_size);
assert(self != NULL);
self->page_size = page_size;
self->alloc_size = alloc_size;
self->slab_size = page_size / alloc_size;
memset(self->slab, 0, self->slab_size * sizeof(*self->slab));
return self;
}
void __heap_delete(heap_t * self, const char *file, int line)
{
if (unlikely(self == NULL))
return;
size_t i;
for (i = 0; i < self->slab_size; i++) {
if (self->slab[i] != NULL) {
slab_delete(self->slab[i]);
self->slab[i] = NULL;
}
}
memset(self, 0, sizeof *self);
FREE(self);
}
void *__heap_alloc(heap_t * self, size_t size, const char *file, int line)
{
if (unlikely(self == NULL))
throw_unexpected(HEAP_NULL);
size = max(align(size, self->alloc_size), self->alloc_size);
size_t slab_pos = size / self->alloc_size - 1;
if (unlikely(self->slab_size < slab_pos))
throw_unexpected(HEAP_ALLOC);
if (unlikely(self->slab[slab_pos] == NULL))
self->slab[slab_pos] = slab_new(size, 0);
return slab_alloc(self->slab[slab_pos]);
}
void __heap_free(heap_t * self, void *ptr, const char *file, int line)
{
if (unlikely(self == NULL))
throw_unexpected(HEAP_NULL);
void *data = (void *)((uint32_t) ptr & ~(self->page_size - 1));
cache_t *c = (cache_t *) (data + self->page_size - sizeof(cache_t));
cache_check(c);
slab_free(cache_slab(c), ptr);
}
/* ======================================================================= */
static uint32_t page_size;
void heap_ctor(void) __constructor;
void heap_ctor(void)
{
page_size = (const uint32_t)sysconf(_SC_PAGESIZE);
assert(0 < page_size);
}
void heap_dtor(void) __destructor;
void heap_dtor(void)
{
}
/* ======================================================================= */
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