/*
* Copyright (c) 2007 Konopa-Jelen-Majer
* 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 FileSystemTask
* @{
*/
/**
* @file message.c
* @brief Sending extended well formed messages to FS over
* standard HelenOS message agrs and over shared buffer.
*/
#include <async.h>
#include <task.h>
#include "../fs/fs.h"
#include "message.h"
int send_request(int phoneid, ipcarg_t method, message_params_t *params, void *shared_buffer);
void unpack_message(message_params_t *message, ipc_call_t m_input, void *shared_buffer);
/**
* Forms and sends extended message to FS
* This method should be used by all callers of FS. Candidate at library function.
*/
int send_request(int phoneid, ipcarg_t method, message_params_t *params, void *shared_buffer)
{
int retval, shift;
size_t size;
size = sizeof(message_params_t);
memset((void *)shared_buffer
, 0, size
);
/* Setting 'buffered' parameters. */
memcpy((void* )shared_buffer
, (void *)(¶ms
->nbytes
), sizeof(unsigned int));
shift = sizeof(unsigned int);
memcpy((void *)(shared_buffer
+ shift
), (void *)(¶ms
->offset
), sizeof(offset_t
));
shift += sizeof(offset_t);
memcpy((void *)(shared_buffer
+ shift
), (void *)(¶ms
->fname
), DIRSIZEX
);
params->fname[DIRSIZEX-1] = '\0';
shift += DIRSIZEX * sizeof(char);
memcpy((void *)(shared_buffer
+ shift
), (void *)(¶ms
->entry_number
), sizeof(int));
/* 'Most used' parameters will be pass in standart message parameters. */
retval = async_req_3(phoneid, method, task_get_id(), params->fd, params->whence, NULL, NULL, NULL);
return retval;
}
/**
* Unpacks message to given message_params_t* structure
* Will be used by FS to unpacking incoming extended message.
*/
void unpack_message(message_params_t *message, ipc_call_t m_input, void *shared_buffer)
{
int shift;
/* Core message parameters. */
message->id_task = IPC_GET_ARG1(m_input);
message->fd = IPC_GET_ARG2(m_input);
message->whence = IPC_GET_ARG3(m_input);
/* Buffered parameters - extended. */
memcpy((void *)&message
->nbytes
, (void *)(shared_buffer
), sizeof(unsigned int));
shift = sizeof(unsigned int);
memcpy((void *)(&message
->offset
), (void *)(shared_buffer
+ shift
), sizeof(offset_t
));
shift += sizeof(offset_t);
memcpy((void *)(&message
->fname
), (void *)(shared_buffer
+ shift
), DIRSIZEX
);
shift += DIRSIZEX * sizeof(char);
memcpy((void *)(&message
->entry_number
), (void *)(shared_buffer
+ shift
), sizeof(int));
}
/**
*}
*/