globals.c revision 507fd43f 
1/*
2
3Copyright 1989, 1998  The Open Group
4
5Permission to use, copy, modify, distribute, and sell this software and its
6documentation for any purpose is hereby granted without fee, provided that
7the above copyright notice appear in all copies and that both that
8copyright notice and this permission notice appear in supporting
9documentation.
10
11The above copyright notice and this permission notice shall be included
12in all copies or substantial portions of the Software.
13
14THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
15OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
16MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
17IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
18OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20OTHER DEALINGS IN THE SOFTWARE.
21
22Except as contained in this notice, the name of The Open Group shall
23not be used in advertising or otherwise to promote the sale, use or
24other dealings in this Software without prior written authorization
25from The Open Group.
26
27*/
28
29/*
30 *
31 *                                 Global data
32 *
33 * This file should contain only those objects which must be predefined.
34 */
35#ifdef HAVE_CONFIG_H
36#include <config.h>
37#endif
38#include <X11/Xlibint.h>
39
40
41/*
42 * If possible, it is useful to have the global data default to a null value.
43 * Some shared library implementations are *much* happier if there isn't any
44 * global initialized data.
45 */
46#ifdef NULL_NOT_ZERO			/* then need to initialize */
47#define SetZero(t,var,z) t var = z
48#else
49#define SetZero(t,var,z) t var
50#endif
51
52#ifdef USL_SHAREDLIB			/* then need extra variables */
53/*
54 * If we need to define extra variables for each global
55 */
56#define ZEROINIT(t,var,val) SetZero(t,var,val); \
57  SetZero (long, _libX_##var##Flag, 0); \
58  SetZero (void *, _libX_##var##Ptr, NULL)
59
60#else /* else not USL_SHAREDLIB */
61/*
62 * no extra crud
63 */
64#define ZEROINIT(t,var,val) SetZero (t, var, val)
65
66#endif /* USL_SHAREDLIB */
67
68
69/*
70 * Error handlers; used to be in XlibInt.c
71 */
72ZEROINIT (XErrorHandler, _XErrorFunction, NULL);
73ZEROINIT (XIOErrorHandler, _XIOErrorFunction, NULL);
74ZEROINIT (_XQEvent *, _qfree, NULL);
75
76
77/*
78 * Debugging information and display list; used to be in XOpenDis.c
79 */
80#ifndef WIN32
81ZEROINIT (int, _Xdebug, 0);
82#endif
83ZEROINIT (Display *, _XHeadOfDisplayList, NULL);
84
85
86#ifdef XTEST1
87/*
88 * Stuff for input synthesis extension:
89 */
90/*
91 * Holds the two event type codes for this extension.  The event type codes
92 * for this extension may vary depending on how many extensions are installed
93 * already, so the initial values given below will be added to the base event
94 * code that is acquired when this extension is installed.
95 *
96 * These two variables must be available to programs that use this extension.
97 */
98int			XTestInputActionType = 0;
99int			XTestFakeAckType   = 1;
100#endif
101
102#ifdef USE_THREAD_SAFETY_CONSTRUCTOR
103__attribute__((constructor)) static void
104xlib_ctor(void)
105{
106    XInitThreads();
107}
108
109__attribute__((destructor)) static void
110xlib_dtor(void)
111{
112    XFreeThreads();
113}
114#endif
115