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/*-
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* 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., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
* The full GNU General Public License is included in this distribution
* in the file called LICENSE.GPL.
*
* BSD LICENSE
*
* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
*
* $FreeBSD$
*/
#ifndef _SCI_BASE_SUBJECT_H_
#define _SCI_BASE_SUBJECT_H_
/**
* @file
*
* @brief This file contains all of the structures, constants, and methods
* common to all subjects object definitions. A subject is a
* participant in the observer pattern. A subject represents the
* object being observed.
*/
#ifdef __cplusplus
extern "C" {
#endif // __cplusplus
#include <dev/isci/scil/sci_types.h>
#if defined(SCI_LOGGING)
struct SCI_BASE_OBSERVER;
/**
* @struct SCI_BASE_SUBJECT
*
* @brief This structure defines the fields common to all subjects that
* participate in the observer design pattern
*/
typedef struct SCI_BASE_SUBJECT
{
struct SCI_BASE_OBSERVER *observer_list;
} SCI_BASE_SUBJECT_T;
/**
* @brief This method acts as the basic constructor for the subject.
*
* @param[in] this_subject This fields specifies the subject being
* constructed.
*
* @return none
*/
void sci_base_subject_construct(
SCI_BASE_SUBJECT_T *this_subject
);
/**
* @brief This method will call the update method for all
* observers attached to this subject.
*
* @param[in] this_subject This parameter specifies the subject for
* which to notify participating observers.
*
* @return none
*/
void sci_base_subject_notify(
SCI_BASE_SUBJECT_T *this_subject
);
/**
* @brief This method will add an observer to the subject.
*
* @param[in] this_subject This parameter specifies the subject for which
* an observer is being added.
* @param[in] observer This parameter specifies the observer that wishes
* it listen for notifications for the supplied subject.
*
* @return none
*/
void sci_base_subject_attach_observer(
SCI_BASE_SUBJECT_T *this_subject,
struct SCI_BASE_OBSERVER *observer
);
/**
* @brief This method will remove the observer from the subject.
*
* @param[in] this_subject
* @param[in] my_observer
*
* @return none
*/
void sci_base_subject_detach_observer(
SCI_BASE_SUBJECT_T *this_subject,
struct SCI_BASE_OBSERVER *my_observer
);
#else // defined(SCI_LOGGING)
typedef U8 SCI_BASE_SUBJECT_T;
#define sci_base_subject_construct
#define sci_base_subject_notify
#define sci_base_subject_attach_observer
#define sci_base_subject_detach_observer
#endif // defined(SCI_LOGGING)
#ifdef __cplusplus
}
#endif // __cplusplus
#endif // _SCI_BASE_SUBJECT_H_
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