hw/xwin/winclipboardinit.c

   1 /*
   2  *Copyright (C) 2003-2004 Harold L Hunt II All Rights Reserved.
   3  *
   4  *Permission is hereby granted, free of charge, to any person obtaining
   5  * a copy of this software and associated documentation files (the
   6  *"Software"), to deal in the Software without restriction, including
   7  *without limitation the rights to use, copy, modify, merge, publish,
   8  *distribute, sublicense, and/or sell copies of the Software, and to
   9  *permit persons to whom the Software is furnished to do so, subject to
  10  *the following conditions:
  11  *
  12  *The above copyright notice and this permission notice shall be
  13  *included in all copies or substantial portions of the Software.
  14  *
  15  *THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  *EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  *MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  *NONINFRINGEMENT. IN NO EVENT SHALL HAROLD L HUNT II BE LIABLE FOR
  19  *ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
  20  *CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  21  *WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  *
  23  *Except as contained in this notice, the name of Harold L Hunt II
  24  *shall not be used in advertising or otherwise to promote the sale, use
  25  *or other dealings in this Software without prior written authorization
  26  *from Harold L Hunt II.
  27  *
  28  * Authors:     Harold L Hunt II
  29  */
  30
  31 #ifdef HAVE_XWIN_CONFIG_H
  32 #include <xwin-config.h>
  33 #endif
  34
  35 #include <unistd.h>
  36 #include <pthread.h>
  37
  38 #include "win.h"
  39 #include "winclipboard/winclipboard.h"
  40 #include "windisplay.h"
  41 #include "winauth.h"
  42
  43 #define WIN_CLIPBOARD_RETRIES                   40
  44 #define WIN_CLIPBOARD_DELAY                     1
  45
  46 /*
  47  * Local variables
  48  */
  49
  50 static pthread_t g_ptClipboardProc;
  51
  52 /*
  53  *
  54  */
  55 static void *
  56 winClipboardThreadProc(void *arg)
  57 {
  58   char szDisplay[512];
  59   xcb_auth_info_t *auth_info;
  60   int clipboardRestarts = 0;
  61
  62   while (1)
  63     {
  64       Bool fShutdown;
  65
  66       ++clipboardRestarts;
  67
  68       /* Setup the display connection string */
  69       /*
  70        * NOTE: Always connect to screen 0 since we require that screen
  71        * numbers start at 0 and increase without gaps.  We only need
  72        * to connect to one screen on the display to get events
  73        * for all screens on the display.  That is why there is only
  74        * one clipboard client thread.
  75       */
  76       winGetDisplayName(szDisplay, 0);
  77
  78       /* Print the display connection string */
  79       ErrorF("winClipboardThreadProc - DISPLAY=%s\n", szDisplay);
  80
  81       /* Flag that clipboard client has been launched */
  82       g_fClipboardStarted = TRUE;
  83
  84       /* Use our generated cookie for authentication */
  85       auth_info = winGetXcbAuthInfo();
  86
  87       fShutdown = winClipboardProc(szDisplay, auth_info);
  88
  89       /* Flag that clipboard client has stopped */
  90       g_fClipboardStarted = FALSE;
  91
  92       if (fShutdown)
  93         break;
  94
  95       /* checking if we need to restart */
  96       if (clipboardRestarts >= WIN_CLIPBOARD_RETRIES) {
  97         /* terminates clipboard thread but the main server still lives */
  98         ErrorF("winClipboardProc - the clipboard thread has restarted %d times and seems to be unstable, disabling clipboard integration\n", clipboardRestarts);
  99         g_fClipboard = FALSE;
 100         break;
 101       }
 102
 103       sleep(WIN_CLIPBOARD_DELAY);
 104       ErrorF("winClipboardProc - trying to restart clipboard thread \n");
 105     }
 106
 107   return NULL;
 108 }
 109
 110 /*
 111  * Initialize the Clipboard module
 112  */
 113
 114 Bool
 115 winInitClipboard(void)
 116 {
 117     winDebug("winInitClipboard ()\n");
 118
 119     /* Spawn a thread for the Clipboard module */
 120     if (pthread_create(&g_ptClipboardProc, NULL, winClipboardThreadProc, NULL)) {
 121         /* Bail if thread creation failed */
 122         ErrorF("winInitClipboard - pthread_create failed.\n");
 123         return FALSE;
 124     }
 125
 126     return TRUE;
 127 }
 128
 129 void
 130 winClipboardShutdown(void)
 131 {
 132   /* Close down clipboard resources */
 133   if (g_fClipboard && g_fClipboardStarted) {
 134     /* Synchronously destroy the clipboard window */
 135     winClipboardWindowDestroy();
 136
 137     /* Wait for the clipboard thread to exit */
 138     pthread_join(g_ptClipboardProc, NULL);
 139
 140     g_fClipboardStarted = FALSE;
 141
 142     winDebug("winClipboardShutdown - Clipboard thread has exited.\n");
 143   }
 144 }