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/*
* Copyright (C) 2003-2013 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "SocketMonitor.hxx"
#include "Loop.hxx"
#include "system/fd_util.h"
#include "Compiler.h"
#include <assert.h>
#ifdef WIN32
#include <winsock2.h>
#else
#include <sys/socket.h>
#endif
#ifdef USE_INTERNAL_EVENTLOOP
void
SocketMonitor::Dispatch(unsigned flags)
{
flags &= GetScheduledFlags();
if (flags != 0 && !OnSocketReady(flags) && IsDefined())
Cancel();
}
#endif
#ifdef USE_GLIB_EVENTLOOP
/*
* GSource methods
*
*/
gboolean
SocketMonitor::Prepare(gcc_unused GSource *source, gcc_unused gint *timeout_r)
{
return false;
}
gboolean
SocketMonitor::Check(GSource *_source)
{
const Source &source = *(const Source *)_source;
const SocketMonitor &monitor = *source.monitor;
assert(_source == &monitor.source->base);
return monitor.Check();
}
gboolean
SocketMonitor::Dispatch(GSource *_source,
gcc_unused GSourceFunc callback,
gcc_unused gpointer user_data)
{
Source &source = *(Source *)_source;
SocketMonitor &monitor = *source.monitor;
assert(_source == &monitor.source->base);
monitor.Dispatch();
return true;
}
/**
* The vtable for our GSource implementation. Unfortunately, we
* cannot declare it "const", because g_source_new() takes a non-const
* pointer, for whatever reason.
*/
static GSourceFuncs socket_monitor_source_funcs = {
SocketMonitor::Prepare,
SocketMonitor::Check,
SocketMonitor::Dispatch,
nullptr,
nullptr,
nullptr,
};
SocketMonitor::SocketMonitor(int _fd, EventLoop &_loop)
:fd(-1), loop(_loop),
source(nullptr) {
assert(_fd >= 0);
Open(_fd);
}
#endif
SocketMonitor::~SocketMonitor()
{
if (IsDefined())
Close();
}
void
SocketMonitor::Open(int _fd)
{
assert(fd < 0);
#ifdef USE_GLIB_EVENTLOOP
assert(source == nullptr);
#endif
assert(_fd >= 0);
fd = _fd;
#ifdef USE_GLIB_EVENTLOOP
poll = {fd, 0, 0};
source = (Source *)g_source_new(&socket_monitor_source_funcs,
sizeof(*source));
source->monitor = this;
g_source_attach(&source->base, loop.GetContext());
g_source_add_poll(&source->base, &poll);
#endif
}
int
SocketMonitor::Steal()
{
assert(IsDefined());
Cancel();
int result = fd;
fd = -1;
#ifdef USE_GLIB_EVENTLOOP
g_source_destroy(&source->base);
g_source_unref(&source->base);
source = nullptr;
#endif
return result;
}
void
SocketMonitor::Abandon()
{
assert(IsDefined());
#ifdef USE_INTERNAL_EVENTLOOP
int old_fd = fd;
fd = -1;
loop.Abandon(old_fd, *this);
#else
Steal();
#endif
}
void
SocketMonitor::Close()
{
close_socket(Steal());
}
void
SocketMonitor::Schedule(unsigned flags)
{
assert(IsDefined());
if (flags == GetScheduledFlags())
return;
#ifdef USE_INTERNAL_EVENTLOOP
if (scheduled_flags == 0)
loop.AddFD(fd, flags, *this);
else if (flags == 0)
loop.RemoveFD(fd, *this);
else
loop.ModifyFD(fd, flags, *this);
scheduled_flags = flags;
#endif
#ifdef USE_GLIB_EVENTLOOP
poll.events = flags;
poll.revents &= flags;
loop.WakeUp();
#endif
}
SocketMonitor::ssize_t
SocketMonitor::Read(void *data, size_t length)
{
assert(IsDefined());
int flags = 0;
#ifdef MSG_DONTWAIT
flags |= MSG_DONTWAIT;
#endif
return recv(Get(), (char *)data, length, flags);
}
SocketMonitor::ssize_t
SocketMonitor::Write(const void *data, size_t length)
{
assert(IsDefined());
int flags = 0;
#ifdef MSG_NOSIGNAL
flags |= MSG_NOSIGNAL;
#endif
#ifdef MSG_DONTWAIT
flags |= MSG_DONTWAIT;
#endif
return send(Get(), (const char *)data, length, flags);
}
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