seccfobject.cpp   [plain text]

/*
 * Copyright (c) 2000-2004 Apple Computer, Inc. All Rights Reserved.
 * 
 * @APPLE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
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 * 
 * @APPLE_LICENSE_HEADER_END@
 */

#include <security_utilities/seccfobject.h>
#include <security_utilities/cfclass.h>
#include <security_utilities/errors.h>
#include <security_utilities/debugging.h>

//
// SecCFObject
//
SecCFObject *
SecCFObject::optional(CFTypeRef cfTypeRef) throw()
{
	if (!cfTypeRef)
		return NULL;

	return const_cast<SecCFObject *>(reinterpret_cast<const SecCFObject *>(reinterpret_cast<const uint8_t *>(cfTypeRef) + kAlignedRuntimeSize));
}

SecCFObject *
SecCFObject::required(CFTypeRef cfTypeRef, OSStatus error)
{
	SecCFObject *object = optional(cfTypeRef);
	if (!object)
		MacOSError::throwMe(error);

	return object;
}

void *
SecCFObject::allocate(size_t size, const CFClass &cfclass) throw(std::bad_alloc)
{
	void *p = const_cast<void *>(_CFRuntimeCreateInstance(cfclass.allocator, cfclass.typeID,
		size + kAlignedRuntimeSize - sizeof(CFRuntimeBase), NULL));
	if (p == NULL)
		throw std::bad_alloc();

	reinterpret_cast<SecRuntimeBase *>(p)->isNew = true;

	void *q = reinterpret_cast<void *>(reinterpret_cast<uint8_t *>(p) + kAlignedRuntimeSize);

#if !defined(NDEBUG)
	const CFRuntimeClass *runtimeClass = _CFRuntimeGetClassWithTypeID(cfclass.typeID);
	secdebug("sec", "allocated: %p: %s(%lu)", q,
		runtimeClass && runtimeClass->className ? runtimeClass->className
		: "SecCFObject", cfclass.typeID);
#endif
	return q;
}

void
SecCFObject::operator delete(void *object) throw()
{
	secdebug("sec", "SecCFObject operator delete %p", object);
	CFTypeRef cfType = reinterpret_cast<CFTypeRef>(reinterpret_cast<const uint8_t *>(object) - kAlignedRuntimeSize);
	CFRelease(cfType);
}

SecCFObject::~SecCFObject() throw()
{
#if !defined(NDEBUG)
	CFTypeRef cfType = *this;
	CFTypeID typeID = CFGetTypeID(cfType);
	const CFRuntimeClass *runtimeClass = _CFRuntimeGetClassWithTypeID(typeID);
	secdebug("sec", "destroyed: %p: %s(%lu)", this,
		runtimeClass && runtimeClass->className ? runtimeClass->className
		: "SecCFObject", typeID);
#endif
}

bool
SecCFObject::equal(SecCFObject &other)
{
	return this == &other;
}

CFHashCode
SecCFObject::hash()
{
	return CFHashCode(this);
}

CFStringRef
SecCFObject::copyFormattingDesc(CFDictionaryRef dict)
{
	return NULL;
}

CFStringRef
SecCFObject::copyDebugDesc()
{
	return NULL;
}

CFTypeRef
SecCFObject::handle(bool retain) throw()
{
	CFTypeRef cfType = *this;
	if (retain && !isNew()) CFRetain(cfType);
	return cfType;
}