obt/instance.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56

#include "obt/obt.h"

#ifdef HAVE_STRING_H
#  include <string.h>
#endif
#ifdef HAVE_FCNTL_H
#  include <fcntl.h>
#endif
#ifdef HAVE_UNISTD_H
#  include <unistd.h>
#endif

struct _ObtInstance
{
    gint ref;
    Display *d;
};

ObtInstance* obt_instance_new(const char *display_name)
{
    gchar *n;
    Display *d;
    ObtInstance *inst = NULL;

    n = display_name ? g_strdup(display_name) : NULL;
    d = XOpenDisplay(n);
    if (d) {
        if (fcntl(ConnectionNumber(d), F_SETFD, 1) == -1)
            g_message("Failed to set display as close-on-exec");

        inst = g_new(ObtInstance, 1);
        inst->ref = 1;
        inst->d = d;
    }
    g_free(n);

    return inst;
}

void obt_instance_ref(ObtInstance *inst)
{
    ++inst->ref;
}

void obt_instance_unref(ObtInstance *inst)
{
    if (inst && --inst->ref == 0) {
        XCloseDisplay(inst->d);
        obt_free0(inst, ObtInstance, 1);
    }
}

Display* obt_display(const ObtInstance *inst)
{
    return inst->d;
}