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/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
Copyright (C) 2009-2015 Red Hat, Inc.
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, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <pthread.h>
#include "red-common.h"
#include "dispatcher.h"
#include "main-dispatcher.h"
#include "red-channel.h"
#include "reds.h"
/*
* Main Dispatcher
* ===============
*
* Communication channel between any non main thread and the main thread.
*
* The main thread is that from which spice_server_init is called.
*
* Messages are single sized, sent from the non-main thread to the main-thread.
* No acknowledge is sent back. This prevents a possible deadlock with the main
* thread already waiting on a response for the existing red_dispatcher used
* by the worker thread.
*
* All events have three functions:
* main_dispatcher_<event_name> - non static, public function
* main_dispatcher_self_<event_name> - handler for main thread
* main_dispatcher_handle_<event_name> - handler for callback from main thread
* seperate from self because it may send an ack or do other work in the future.
*/
typedef struct {
Dispatcher base;
SpiceCoreInterface *core;
} MainDispatcher;
MainDispatcher main_dispatcher;
enum {
MAIN_DISPATCHER_CHANNEL_EVENT = 0,
MAIN_DISPATCHER_MIGRATE_SEAMLESS_DST_COMPLETE,
MAIN_DISPATCHER_SET_MM_TIME_LATENCY,
MAIN_DISPATCHER_CLIENT_DISCONNECT,
MAIN_DISPATCHER_NUM_MESSAGES
};
typedef struct MainDispatcherChannelEventMessage {
int event;
SpiceChannelEventInfo *info;
} MainDispatcherChannelEventMessage;
typedef struct MainDispatcherMigrateSeamlessDstCompleteMessage {
RedClient *client;
} MainDispatcherMigrateSeamlessDstCompleteMessage;
typedef struct MainDispatcherMmTimeLatencyMessage {
RedClient *client;
uint32_t latency;
} MainDispatcherMmTimeLatencyMessage;
typedef struct MainDispatcherClientDisconnectMessage {
RedClient *client;
} MainDispatcherClientDisconnectMessage;
/* channel_event - calls core->channel_event, must be done in main thread */
static void main_dispatcher_self_handle_channel_event(
int event,
SpiceChannelEventInfo *info)
{
reds_handle_channel_event(event, info);
}
static void main_dispatcher_handle_channel_event(void *opaque,
void *payload)
{
MainDispatcherChannelEventMessage *channel_event = payload;
main_dispatcher_self_handle_channel_event(channel_event->event,
channel_event->info);
}
void main_dispatcher_channel_event(int event, SpiceChannelEventInfo *info)
{
MainDispatcherChannelEventMessage msg = {0,};
if (pthread_self() == main_dispatcher.base.self) {
main_dispatcher_self_handle_channel_event(event, info);
return;
}
msg.event = event;
msg.info = info;
dispatcher_send_message(&main_dispatcher.base, MAIN_DISPATCHER_CHANNEL_EVENT,
&msg);
}
static void main_dispatcher_handle_migrate_complete(void *opaque,
void *payload)
{
MainDispatcherMigrateSeamlessDstCompleteMessage *mig_complete = payload;
reds_on_client_seamless_migrate_complete(mig_complete->client);
red_client_unref(mig_complete->client);
}
static void main_dispatcher_handle_mm_time_latency(void *opaque,
void *payload)
{
MainDispatcherMmTimeLatencyMessage *msg = payload;
reds_set_client_mm_time_latency(msg->client, msg->latency);
red_client_unref(msg->client);
}
static void main_dispatcher_handle_client_disconnect(void *opaque,
void *payload)
{
MainDispatcherClientDisconnectMessage *msg = payload;
spice_debug("client=%p", msg->client);
reds_client_disconnect(msg->client);
red_client_unref(msg->client);
}
void main_dispatcher_seamless_migrate_dst_complete(RedClient *client)
{
MainDispatcherMigrateSeamlessDstCompleteMessage msg;
if (pthread_self() == main_dispatcher.base.self) {
reds_on_client_seamless_migrate_complete(client);
return;
}
msg.client = red_client_ref(client);
dispatcher_send_message(&main_dispatcher.base, MAIN_DISPATCHER_MIGRATE_SEAMLESS_DST_COMPLETE,
&msg);
}
void main_dispatcher_set_mm_time_latency(RedClient *client, uint32_t latency)
{
MainDispatcherMmTimeLatencyMessage msg;
if (pthread_self() == main_dispatcher.base.self) {
reds_set_client_mm_time_latency(client, latency);
return;
}
msg.client = red_client_ref(client);
msg.latency = latency;
dispatcher_send_message(&main_dispatcher.base, MAIN_DISPATCHER_SET_MM_TIME_LATENCY,
&msg);
}
void main_dispatcher_client_disconnect(RedClient *client)
{
MainDispatcherClientDisconnectMessage msg;
if (!client->disconnecting) {
spice_debug("client %p", client);
msg.client = red_client_ref(client);
dispatcher_send_message(&main_dispatcher.base, MAIN_DISPATCHER_CLIENT_DISCONNECT,
&msg);
} else {
spice_debug("client %p already during disconnection", client);
}
}
static void dispatcher_handle_read(int fd, int event, void *opaque)
{
Dispatcher *dispatcher = opaque;
dispatcher_handle_recv_read(dispatcher);
}
/*
* FIXME:
* Reds routines shouldn't be exposed. Instead reds.c should register the callbacks,
* and the corresponding operations should be made only via main_dispatcher.
*/
void main_dispatcher_init(SpiceCoreInterface *core)
{
memset(&main_dispatcher, 0, sizeof(main_dispatcher));
main_dispatcher.core = core;
dispatcher_init(&main_dispatcher.base, MAIN_DISPATCHER_NUM_MESSAGES, &main_dispatcher.base);
core->watch_add(main_dispatcher.base.recv_fd, SPICE_WATCH_EVENT_READ,
dispatcher_handle_read, &main_dispatcher.base);
dispatcher_register_handler(&main_dispatcher.base, MAIN_DISPATCHER_CHANNEL_EVENT,
main_dispatcher_handle_channel_event,
sizeof(MainDispatcherChannelEventMessage), 0 /* no ack */);
dispatcher_register_handler(&main_dispatcher.base, MAIN_DISPATCHER_MIGRATE_SEAMLESS_DST_COMPLETE,
main_dispatcher_handle_migrate_complete,
sizeof(MainDispatcherMigrateSeamlessDstCompleteMessage), 0 /* no ack */);
dispatcher_register_handler(&main_dispatcher.base, MAIN_DISPATCHER_SET_MM_TIME_LATENCY,
main_dispatcher_handle_mm_time_latency,
sizeof(MainDispatcherMmTimeLatencyMessage), 0 /* no ack */);
dispatcher_register_handler(&main_dispatcher.base, MAIN_DISPATCHER_CLIENT_DISCONNECT,
main_dispatcher_handle_client_disconnect,
sizeof(MainDispatcherClientDisconnectMessage), 0 /* no ack */);
}
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