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/*
* libosengine - A synchronization engine for the opensync framework
* Copyright (C) 2004-2005 Armin Bauer <armin.bauer@opensync.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "opensync.h"
#include "opensync_internals.h"
/**
* @ingroup OSEngineMessage
* @brief A Message used by the inter thread messaging library
*
*/
/*@{*/
/*! @brief Creates a new message of the given type
*
* This function will create a new message of the given type, with
* the given parent and signal name. The parent will be passed to the OSyncMessageHandler
*
* @param parent Who send this message. Can be any pointer.
* @param msgname The name of the message
* @param type The type of this message
* @returns Pointer to a newly allocated message
*
*/
OSyncMessage *osync_message_new(OSyncMessageCommand cmd, int size, OSyncError **error)
{
OSyncMessage *message = osync_try_malloc0(sizeof(OSyncMessage), error);
if (!message)
return NULL;
message->cmd = cmd;
message->refCount = 1;
if (size > 0)
message->buffer = g_byte_array_sized_new( size );
else
message->buffer = g_byte_array_new();
message->buffer_read_pos = 0;
return message;
}
void osync_message_ref(OSyncMessage *message)
{
g_atomic_int_inc(&(message->refCount));
}
void osync_message_unref(OSyncMessage *message)
{
if (g_atomic_int_dec_and_test(&(message->refCount))) {
g_byte_array_free(message->buffer, TRUE);
g_free(message);
}
}
/*! @brief Sets the handler that will receive the reply
*
* @param message The message to work on
* @param replyqueue Which queue should receive the reply
* @param handler Which handler should be called when the reply is received
* @param user_data Which user data should be passed to the handler
*
*/
void osync_message_set_handler(OSyncMessage *message, OSyncMessageHandler handler, gpointer user_data)
{
osync_trace(TRACE_INTERNAL, "%p handler to %p", message, user_data);
message->user_data = user_data;
message->callback = handler;
}
/*! @brief Creates a new reply
*
* @param parent Who send this message. Can be any pointer.
* @param message The message to which you wish to reply
* @returns Pointer to a newly allocated message
*
*/
OSyncMessage *osync_message_new_reply(OSyncMessage *message, OSyncError **error)
{
OSyncMessage *reply = osync_message_new(OSYNC_MESSAGE_REPLY, 0, error);
if (!reply)
return NULL;
reply->id1 = message->id1;
reply->id2 = message->id2;
return reply;
}
/*! @brief Creates a new error reply
*
* @param parent Who send this message. Can be any pointer.
* @param message The message to which you wish to reply
* @returns Pointer to a newly allocated message
*/
OSyncMessage *osync_message_new_errorreply(OSyncMessage *message, OSyncError **error)
{
OSyncMessage *reply = osync_message_new(OSYNC_MESSAGE_ERRORREPLY, 0, error);
if (!reply)
return NULL;
reply->id1 = message->id1;
reply->id2 = message->id2;
return reply;
}
OSyncMessage *osync_message_new_error(OSyncError *error, OSyncError **loc_error)
{
OSyncMessage *message = osync_message_new(OSYNC_MESSAGE_ERROR, 0, loc_error);
if (!message)
return NULL;
osync_marshal_error(message, error);
return message;
}
/*! @brief Checks if the message is a error
*
* @param message The message to check
* @return #TRUE if the message is a error, #FALSE otherwise
*
*/
gboolean osync_message_is_error(OSyncMessage *message)
{
if (message->cmd == OSYNC_MESSAGE_ERRORREPLY)
return TRUE;
return FALSE;
}
osync_bool osync_message_is_answered(OSyncMessage *message)
{
return message->is_answered;
}
void osync_message_set_answered(OSyncMessage *message)
{
message->is_answered = TRUE;
}
/*! @brief Gets the command from a message
*
* This function will return the command of a message
*
* @param message The message
* @returns the command
*/
OSyncMessageCommand osync_message_get_command(OSyncMessage *message)
{
g_assert(message);
return message->cmd;
}
/*@}*/
void osync_message_write_int(OSyncMessage *message, int value)
{
g_byte_array_append( message->buffer, (unsigned char*)&value, sizeof( int ) );
}
void osync_message_write_long_long_int(OSyncMessage *message, long long int value)
{
g_byte_array_append( message->buffer, (unsigned char*)&value, sizeof( long long int ) );
}
void osync_message_write_string(OSyncMessage *message, const char *value)
{
int length = 0;
if (value == NULL) {
length = -1;
g_byte_array_append( message->buffer, (unsigned char*)&length, sizeof( int ) );
} else {
int length = strlen( value ) + 1;
g_byte_array_append( message->buffer, (unsigned char*)&length, sizeof( int ) );
g_byte_array_append( message->buffer, (unsigned char*)value, length );
}
}
void osync_message_write_data(OSyncMessage *message, const void *value, int size)
{
g_byte_array_append( message->buffer, value, size );
}
void osync_message_read_int(OSyncMessage *message, int *value)
{
memcpy(value, &(message->buffer->data[ message->buffer_read_pos ]), sizeof(int));
message->buffer_read_pos += sizeof(int);
}
void osync_message_read_long_long_int(OSyncMessage *message, long long int *value)
{
memcpy(value, &(message->buffer->data[ message->buffer_read_pos ]), sizeof(long long int));
message->buffer_read_pos += sizeof(long long int);
}
void osync_message_read_const_string(OSyncMessage *message, char **value)
{
int length = 0;
memcpy(&length, &(message->buffer->data[ message->buffer_read_pos ]), sizeof(int));
message->buffer_read_pos += sizeof(int);
if (length == -1) {
*value = NULL;
return;
}
*value = (char *)&(message->buffer->data[message->buffer_read_pos]);
message->buffer_read_pos += length;
}
void osync_message_read_string(OSyncMessage *message, char **value)
{
int length = 0;
memcpy(&length, &(message->buffer->data[ message->buffer_read_pos ]), sizeof(int));
message->buffer_read_pos += sizeof(int);
if (length == -1) {
*value = NULL;
return;
}
*value = (char*)malloc(length);
memcpy(*value, &(message->buffer->data[ message->buffer_read_pos ]), length );
message->buffer_read_pos += length;
}
void osync_message_read_const_data(OSyncMessage *message, void **value, int size)
{
*value = &(message->buffer->data[message->buffer_read_pos]);
message->buffer_read_pos += size;
}
void osync_message_read_data(OSyncMessage *message, void *value, int size)
{
memcpy(value, &(message->buffer->data[ message->buffer_read_pos ]), size );
message->buffer_read_pos += size;
}
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