winclipboardinit.c revision 35c4bbdf 
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
42#define WIN_CLIPBOARD_RETRIES			40
43#define WIN_CLIPBOARD_DELAY			1
44
45/*
46 * Local variables
47 */
48
49static pthread_t g_ptClipboardProc;
50
51/*
52 *
53 */
54static void *
55winClipboardThreadProc(void *arg)
56{
57  char szDisplay[512];
58  int clipboardRestarts = 0;
59
60  while (1)
61    {
62      Bool fShutdown;
63
64      ++clipboardRestarts;
65
66      /* Use our generated cookie for authentication */
67      winSetAuthorization();
68
69      /* Setup the display connection string */
70      /*
71       * NOTE: Always connect to screen 0 since we require that screen
72       * numbers start at 0 and increase without gaps.  We only need
73       * to connect to one screen on the display to get events
74       * for all screens on the display.  That is why there is only
75       * one clipboard client thread.
76      */
77      winGetDisplayName(szDisplay, 0);
78
79      /* Print the display connection string */
80      ErrorF("winClipboardThreadProc - DISPLAY=%s\n", szDisplay);
81
82      /* Flag that clipboard client has been launched */
83      g_fClipboardStarted = TRUE;
84
85      fShutdown = winClipboardProc(g_fUnicodeClipboard, szDisplay);
86
87      /* Flag that clipboard client has stopped */
88      g_fClipboardStarted = FALSE;
89
90      if (fShutdown)
91        break;
92
93      /* checking if we need to restart */
94      if (clipboardRestarts >= WIN_CLIPBOARD_RETRIES) {
95        /* terminates clipboard thread but the main server still lives */
96        ErrorF("winClipboardProc - the clipboard thread has restarted %d times and seems to be unstable, disabling clipboard integration\n", clipboardRestarts);
97        g_fClipboard = FALSE;
98        break;
99      }
100
101      sleep(WIN_CLIPBOARD_DELAY);
102      ErrorF("winClipboardProc - trying to restart clipboard thread \n");
103    }
104
105  return NULL;
106}
107
108/*
109 * Intialize the Clipboard module
110 */
111
112Bool
113winInitClipboard(void)
114{
115    winDebug("winInitClipboard ()\n");
116
117    /* Spawn a thread for the Clipboard module */
118    if (pthread_create(&g_ptClipboardProc, NULL, winClipboardThreadProc, NULL)) {
119        /* Bail if thread creation failed */
120        ErrorF("winInitClipboard - pthread_create failed.\n");
121        return FALSE;
122    }
123
124    return TRUE;
125}
126
127void
128winClipboardShutdown(void)
129{
130  /* Close down clipboard resources */
131  if (g_fClipboard && g_fClipboardStarted) {
132    /* Synchronously destroy the clipboard window */
133    winClipboardWindowDestroy();
134
135    /* Wait for the clipboard thread to exit */
136    pthread_join(g_ptClipboardProc, NULL);
137
138    g_fClipboardStarted = FALSE;
139
140    winDebug("winClipboardShutdown - Clipboard thread has exited.\n");
141  }
142}
143