/*
* Copyright (c) 2012, Jonathan Schleifer <js@webkeks.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdlib.h>
#include <assert.h>
#include "object.h"
#include "refpool.h"
void*
cfw_new(CFWClass *class, ...)
{
CFWObject *obj;
if ((obj = malloc(class->size)) == NULL)
return NULL;
obj->cls = class;
obj->ref_cnt = 1;
if (class->ctor != NULL) {
va_list args;
va_start(args, class);
if (!class->ctor(obj, args)) {
cfw_unref(obj);
return NULL;
}
va_end(args);
}
return obj;
}
void*
cfw_create(CFWClass *class, ...)
{
CFWObject *obj;
assert(class != cfw_refpool);
if ((obj = malloc(class->size)) == NULL)
return NULL;
obj->cls = class;
obj->ref_cnt = 1;
if (class->ctor != NULL) {
va_list args;
va_start(args, class);
if (!class->ctor(obj, args)) {
cfw_unref(obj);
return NULL;
}
va_end(args);
}
if (!cfw_refpool_add(obj)) {
cfw_unref(obj);
return NULL;
}
return obj;
}
void*
cfw_ref(void *ptr)
{
CFWObject *obj = ptr;
if (obj == NULL)
return NULL;
obj->ref_cnt++;
return obj;
}
void
cfw_unref(void *ptr)
{
CFWObject *obj = ptr;
if (obj == NULL)
return NULL;
if (--obj->ref_cnt == 0)
cfw_free(obj);
}
void
cfw_free(void *ptr)
{
CFWObject *obj = ptr;
if (obj == NULL)
return NULL;
if (obj->cls->dtor != NULL)
obj->cls->dtor(obj);
free(obj);
}
CFWClass*
cfw_class(void *ptr)
{
CFWObject *obj = ptr;
if (obj == NULL)
return NULL;
return obj->cls;
}
bool
cfw_is(void *ptr, CFWClass *cls)
{
CFWObject *obj = ptr;
if (obj == NULL || cls == NULL)
return false;
return (obj->cls == cls);
}
bool
cfw_equal(void *ptr1, void *ptr2)
{
CFWObject *obj1 = ptr1, *obj2 = ptr2;
if (obj1 == obj2)
return true;
if (obj1 == NULL || obj2 == NULL)
return false;
if (obj1->cls->equal != NULL) {
return obj1->cls->equal(obj1, obj2);
} else
return (obj1 == obj2);
}
uint32_t
cfw_hash(void *ptr)
{
CFWObject *obj = ptr;
if (obj == NULL)
return 0;
if (obj->cls->hash != NULL)
return obj->cls->hash(obj);
return (uint32_t)(uintptr_t)ptr;
}
void*
cfw_copy(void *ptr)
{
CFWObject *obj = ptr;
if (obj == NULL)
return NULL;
if (obj->cls->copy != NULL)
return obj->cls->copy(obj);
return NULL;
}
static CFWClass class = {
.name = "CFWObject",
.size = sizeof(CFWObject),
};
CFWClass *cfw_object = &class;