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https://gitlab.uni-freiburg.de/opensourcevdi/spice
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176970f3f1
Make all RedChannelClient hierarchy a C++ class. This allows to use virtual methods. Added a normal contructor instead or properties and g_object_new. As we remove GObject conversion macros I added a macro XXX_CAST to create a function to replace the old macro. They will be removed when more type safety is introduced. There's a new SPICE_CXX_GLIB_ALLOCATOR macro in red-common.h. This macro, added to a class define the class allocator allowing to use, in this case, GLib for allocation. This to avoid C++ library dependency and to initialize all structure to 0 (not all fields are manually initialized, will be improved with more encapsulation). Currently the methods are mainly public, access will be modified when more encapsulation (all functions in method) are done. Some classes are now defined in the header, C++ uses access to limit accessibility but for efficiency and type safety/inline and other features require types to be defined in the headers. Some fields were moved from XxxPrivate structure to class, C++ has accessibility. Many destructors are defined as protected to forbid the use of stack, this as these objects uses internal reference counting to have normal pointers. Maybe in the future pointers like std::shared_ptr could be used instead. Reference counting is now implemented very easily using atomic operations. Signed-off-by: Frediano Ziglio <fziglio@redhat.com>
102 lines
3.5 KiB
C++
102 lines
3.5 KiB
C++
/*
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Copyright (C) 2009-2016 Red Hat, Inc.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <fcntl.h>
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#include "common-graphics-channel.h"
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#include "dcc.h"
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#include "red-client.h"
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struct CommonGraphicsChannelPrivate
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{
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int during_target_migrate; /* TRUE when the client that is associated with the channel
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is during migration. Turned off when the vm is started.
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The flag is used to avoid sending messages that are artifacts
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of the transition from stopped vm to loaded vm (e.g., recreation
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of the primary surface) */
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};
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G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE(CommonGraphicsChannel, common_graphics_channel,
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RED_TYPE_CHANNEL)
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uint8_t *CommonGraphicsChannelClient::alloc_recv_buf(uint16_t type, uint32_t size)
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{
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/* SPICE_MSGC_MIGRATE_DATA is the only client message whose size is dynamic */
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if (type == SPICE_MSGC_MIGRATE_DATA) {
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return (uint8_t *) g_malloc(size);
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}
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if (size > sizeof(recv_buf)) {
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spice_warning("unexpected message size %u (max is %zd)", size, sizeof(recv_buf));
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return NULL;
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}
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return recv_buf;
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}
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void CommonGraphicsChannelClient::release_recv_buf(uint16_t type, uint32_t size, uint8_t* msg)
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{
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if (type == SPICE_MSGC_MIGRATE_DATA) {
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g_free(msg);
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}
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}
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bool CommonGraphicsChannelClient::config_socket()
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{
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RedClient *client = get_client();
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MainChannelClient *mcc = red_client_get_main(client);
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RedStream *stream = get_stream();
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gboolean is_low_bandwidth;
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// TODO - this should be dynamic, not one time at channel creation
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is_low_bandwidth = main_channel_client_is_low_bandwidth(mcc);
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if (!red_stream_set_auto_flush(stream, false)) {
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/* FIXME: Using Nagle's Algorithm can lead to apparent delays, depending
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* on the delayed ack timeout on the other side.
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* Instead of using Nagle's, we need to implement message buffering on
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* the application level.
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* see: http://www.stuartcheshire.org/papers/NagleDelayedAck/
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*/
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red_stream_set_no_delay(stream, !is_low_bandwidth);
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}
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// TODO: move wide/narrow ack setting to red_channel.
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ack_set_client_window(is_low_bandwidth ? WIDE_CLIENT_ACK_WINDOW : NARROW_CLIENT_ACK_WINDOW);
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return true;
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}
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static void
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common_graphics_channel_class_init(CommonGraphicsChannelClass *klass)
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{
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}
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static void
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common_graphics_channel_init(CommonGraphicsChannel *self)
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{
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self->priv = (CommonGraphicsChannelPrivate*) common_graphics_channel_get_instance_private(self);
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}
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void common_graphics_channel_set_during_target_migrate(CommonGraphicsChannel *self, gboolean value)
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{
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self->priv->during_target_migrate = value;
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}
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gboolean common_graphics_channel_get_during_target_migrate(CommonGraphicsChannel *self)
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{
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return self->priv->during_target_migrate;
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}
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