mirror of
https://github.com/gnif/LookingGlass.git
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147 lines
3.2 KiB
C
147 lines
3.2 KiB
C
/**
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* Looking Glass
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* Copyright © 2017-2025 The Looking Glass Authors
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* https://looking-glass.io
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "message.h"
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#include "core.h"
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#include "common/debug.h"
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#include "common/ll.h"
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#include "common/time.h"
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#include <stdbool.h>
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#include <stdint.h>
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#include <string.h>
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typedef struct MsgEvent
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{
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uint64_t timestamp;
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LGMsg msg;
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}
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MsgEvent;
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struct MsgState
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{
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struct ll * list;
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struct
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{
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unsigned width;
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unsigned height;
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}
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lastWindowSize;
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};
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static struct MsgState this = {0};
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bool lgMessage_init(void)
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{
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this.list = ll_new();
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if (!this.list)
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{
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DEBUG_ERROR("Failed to create the message list");
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return false;
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}
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return true;
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}
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void lgMessage_deinit(void)
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{
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if (this.list)
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{
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void * tmp;
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while(ll_shift(this.list, &tmp))
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free(tmp);
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ll_free(this.list);
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this.list = NULL;
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}
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}
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void lgMessage_post(const LGMsg * msg)
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{
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MsgEvent * event = (MsgEvent *)malloc(sizeof(*event));
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if (!event)
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{
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DEBUG_ERROR("Out of memory");
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return;
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}
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event->timestamp = microtime();
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memcpy(&event->msg, msg, sizeof(event->msg));
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if (!ll_push(this.list, event))
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{
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DEBUG_ERROR("Failed to post a message to the list");
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free(event);
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}
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}
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void lgMessage_process(void)
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{
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MsgEvent * event;
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MsgEvent * windowSize = NULL;
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while(ll_shift(this.list, (void **)&event))
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{
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switch(event->msg.type)
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{
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case LG_MSG_WINDOWSIZE:
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{
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// retain the last/latest windowsize event
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if (windowSize)
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free(windowSize);
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windowSize = event;
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continue;
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}
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default:
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DEBUG_ERROR("Unhandled %d", event->msg.type);
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break;
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}
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free(event);
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}
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// if there was a windowSize event, then process it
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if (windowSize)
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{
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const uint64_t time = microtime();
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if (time - windowSize->timestamp < 500000)
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{
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// requeue the event for later
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if (!ll_push(this.list, event))
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{
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DEBUG_ERROR("Failed to re-queue the windowSize event");
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free(windowSize);
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}
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}
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else
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{
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if (event->msg.windowSize.width != this.lastWindowSize.width ||
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event->msg.windowSize.height != this.lastWindowSize.height)
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{
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this.lastWindowSize.width = event->msg.windowSize.width;
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this.lastWindowSize.height = event->msg.windowSize.height;
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core_onWindowSizeChanged(
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event->msg.windowSize.width,
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event->msg.windowSize.height);
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}
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free(windowSize);
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}
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}
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}
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