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/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "DBusWatcher.h"
#include "mozilla/Unused.h"
#include "nsThreadUtils.h"
namespace mozilla {
namespace ipc {
DBusWatcher::DBusWatcher(DBusConnection* aConnection, DBusWatch* aWatch)
: mConnection(aConnection)
, mWatch(aWatch)
{
MOZ_ASSERT(mConnection);
MOZ_ASSERT(mWatch);
}
DBusWatcher::~DBusWatcher()
{ }
DBusConnection*
DBusWatcher::GetConnection()
{
return mConnection;
}
void
DBusWatcher::StartWatching()
{
MOZ_ASSERT(!NS_IsMainThread());
auto flags = dbus_watch_get_flags(mWatch);
if (!(flags & (DBUS_WATCH_READABLE|DBUS_WATCH_WRITABLE))) {
return;
}
auto ioLoop = MessageLoopForIO::current();
auto fd = dbus_watch_get_unix_fd(mWatch);
if (flags & DBUS_WATCH_READABLE) {
ioLoop->WatchFileDescriptor(fd, true, MessageLoopForIO::WATCH_READ,
&mReadWatcher, this);
}
if (flags & DBUS_WATCH_WRITABLE) {
ioLoop->WatchFileDescriptor(fd, true, MessageLoopForIO::WATCH_WRITE,
&mWriteWatcher, this);
}
}
void
DBusWatcher::StopWatching()
{
MOZ_ASSERT(!NS_IsMainThread());
auto flags = dbus_watch_get_flags(mWatch);
if (flags & DBUS_WATCH_READABLE) {
mReadWatcher.StopWatchingFileDescriptor();
}
if (flags & DBUS_WATCH_WRITABLE) {
mWriteWatcher.StopWatchingFileDescriptor();
}
}
// DBus utility functions, used as function pointers in DBus setup
void
DBusWatcher::FreeFunction(void* aData)
{
UniquePtr<DBusWatcher> watcher(static_cast<DBusWatcher*>(aData));
}
dbus_bool_t
DBusWatcher::AddWatchFunction(DBusWatch* aWatch, void* aData)
{
MOZ_ASSERT(!NS_IsMainThread());
auto connection = static_cast<DBusConnection*>(aData);
UniquePtr<DBusWatcher> dbusWatcher =
MakeUnique<DBusWatcher>(connection, aWatch);
dbus_watch_set_data(aWatch, dbusWatcher.get(), DBusWatcher::FreeFunction);
if (dbus_watch_get_enabled(aWatch)) {
dbusWatcher->StartWatching();
}
Unused << dbusWatcher.release(); // picked up in |FreeFunction|
return TRUE;
}
void
DBusWatcher::RemoveWatchFunction(DBusWatch* aWatch, void* aData)
{
MOZ_ASSERT(!NS_IsMainThread());
auto dbusWatcher = static_cast<DBusWatcher*>(dbus_watch_get_data(aWatch));
dbusWatcher->StopWatching();
}
void
DBusWatcher::ToggleWatchFunction(DBusWatch* aWatch, void* aData)
{
MOZ_ASSERT(!NS_IsMainThread());
auto dbusWatcher = static_cast<DBusWatcher*>(dbus_watch_get_data(aWatch));
if (dbus_watch_get_enabled(aWatch)) {
dbusWatcher->StartWatching();
} else {
dbusWatcher->StopWatching();
}
}
// I/O-loop callbacks
void
DBusWatcher::OnFileCanReadWithoutBlocking(int aFd)
{
MOZ_ASSERT(!NS_IsMainThread());
dbus_watch_handle(mWatch, DBUS_WATCH_READABLE);
DBusDispatchStatus dbusDispatchStatus;
do {
dbusDispatchStatus = dbus_connection_dispatch(mConnection);
} while (dbusDispatchStatus == DBUS_DISPATCH_DATA_REMAINS);
}
void
DBusWatcher::OnFileCanWriteWithoutBlocking(int aFd)
{
MOZ_ASSERT(!NS_IsMainThread());
dbus_watch_handle(mWatch, DBUS_WATCH_WRITABLE);
}
} // namespace ipc
} // namespace mozilla
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