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/*
* Copyright 2003-2020 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 "Client.hxx"
#include "Config.hxx"
#include "Response.hxx"
#include "Idle.hxx"
#include <cassert>
static void
WriteIdleResponse(Response &r, unsigned flags) noexcept
{
const char *const*idle_names = idle_get_names();
for (unsigned i = 0; idle_names[i]; ++i) {
if (flags & (1 << i))
r.Format("changed: %s\n", idle_names[i]);
}
r.Write("OK\n");
}
void
Client::IdleNotify() noexcept
{
assert(idle_waiting);
assert(idle_flags != 0);
unsigned flags = std::exchange(idle_flags, 0) & idle_subscriptions;
idle_waiting = false;
Response r(*this, 0);
WriteIdleResponse(r, flags);
timeout_event.Schedule(client_timeout);
}
void
Client::IdleAdd(unsigned flags) noexcept
{
if (IsExpired())
return;
idle_flags |= flags;
if (idle_waiting && (idle_flags & idle_subscriptions))
IdleNotify();
}
bool
Client::IdleWait(unsigned flags) noexcept
{
assert(!idle_waiting);
idle_waiting = true;
idle_subscriptions = flags;
if (idle_flags & idle_subscriptions) {
IdleNotify();
return true;
} else {
/* disable timeouts while in "idle" */
timeout_event.Cancel();
return false;
}
}