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/*
*
* D-Bus++ - C++ bindings for D-Bus
*
* Copyright (C) 2005-2007 Paolo Durante <shackan@gmail.com>
*
*
* 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
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
/* Project */
#include <dbus-c++/pipe.h>
#include <dbus-c++/util.h>
#include <dbus-c++/error.h>
/* STD */
#include <unistd.h>
#include <sys/poll.h>
#include <fcntl.h>
#include <errno.h>
#include <cassert>
using namespace DBus;
using namespace std;
Pipe::Pipe(void(*handler)(const void *data, void *buffer, unsigned int nbyte), const void *data) :
_handler(handler),
_fd_write(0),
_fd_read(0),
_data(data)
{
int fd[2];
if (pipe(fd) == 0)
{
_fd_read = fd[0];
_fd_write = fd[1];
fcntl(_fd_read, F_SETFL, O_NONBLOCK);
}
else
{
throw Error("PipeError:errno", toString(errno).c_str());
}
}
void Pipe::write(const void *buffer, unsigned int nbytes)
{
// TODO: ignoring return of read/write generates warning; maybe relevant for eventloop work...
// first write the size into the pipe...
::write(_fd_write, static_cast <const void *>(&nbytes), sizeof(nbytes));
// ...then write the real data
::write(_fd_write, buffer, nbytes);
}
ssize_t Pipe::read(void *buffer, unsigned int &nbytes)
{
// TODO: ignoring return of read/write generates warning; maybe relevant for eventloop work...
// first read the size from the pipe...
::read(_fd_read, &nbytes, sizeof(nbytes));
//ssize_t size = 0;
return ::read(_fd_read, buffer, nbytes);
}
void Pipe::signal()
{
// TODO: ignoring return of read/write generates warning; maybe relevant for eventloop work...
char nullc[1] = {'\0'};
::write(_fd_write, nullc, 1);
}
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