/*
 * Copyright (c) 2006 Ondrej Palkovsky
 * Copyright (c) 2012 Jakub Jermar
 * 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */

/** @addtogroup genericipc
 * @{
 */
/** @file
 */

#include <ipc/sysipc_ops.h>
#include <ipc/ipc.h>
#include <ipc/ipcrsc.h>
#include <abi/errno.h>
#include <arch.h>

static errno_t request_preprocess(call_t *call, phone_t *phone)
{
	cap_handle_t phone_handle;
	errno_t rc = phone_alloc(TASK, &phone_handle);

	/* Remember the phone capability or that an error occured. */
	call->priv = (rc == EOK) ? phone_handle : -1;

	if (rc != EOK) {
		return rc;
	}

	/* Set arg5 for server */
	kobject_t *phone_obj = kobject_get(TASK, phone_handle,
	    KOBJECT_TYPE_PHONE);
	/* Hand over phone_obj's reference to ARG5 */
	IPC_SET_ARG5(call->data, (sysarg_t) phone_obj->phone);

	return EOK;
}

static errno_t request_forget(call_t *call)
{
	cap_handle_t phone_handle = (cap_handle_t) call->priv;

	if (phone_handle < 0) {
		return EOK;
	}

	phone_dealloc(phone_handle);
	/* Hand over reference from ARG5 to phone->kobject */
	phone_t *phone = (phone_t *) IPC_GET_ARG5(call->data);
	/* Drop phone_obj's reference */
	kobject_put(phone->kobject);
	return EOK;
}

static errno_t answer_preprocess(call_t *answer, ipc_data_t *olddata)
{
	/* Hand over reference from ARG5 to phone */
	phone_t *phone = (phone_t *) IPC_GET_ARG5(*olddata);

	/* If the user accepted call, connect */
	if (IPC_GET_RETVAL(answer->data) == EOK) {
		/* Hand over reference from phone to the answerbox */
		(void) ipc_phone_connect(phone, &TASK->answerbox);
	} else {
		kobject_put(phone->kobject);
	}

	return EOK;
}

static errno_t answer_process(call_t *answer)
{
	cap_handle_t phone_handle = (cap_handle_t) answer->priv;

	if (IPC_GET_RETVAL(answer->data)) {
		if (phone_handle >= 0) {
			/*
			 * The phone was indeed allocated and now needs
			 * to be deallocated.
			 */
			phone_dealloc(phone_handle);
		}
	} else {
		IPC_SET_ARG5(answer->data, phone_handle);
	}
	
	return EOK;
}

sysipc_ops_t ipc_m_connect_me_to_ops = {
	.request_preprocess = request_preprocess,
	.request_forget = request_forget,
	.request_process = null_request_process,
	.answer_cleanup = null_answer_cleanup,
	.answer_preprocess = answer_preprocess,
	.answer_process = answer_process,
};

/** @}
 */