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
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
#include "glib-ectomy.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
// static void remove_watch(int fd);
GIOError g_io_channel_read (GIOChannel *channel,
gchar *buf,
gsize count,
gsize *bytes_read)
{
int fd = channel->fd;
gssize result;
if (count > SSIZE_MAX) /* At least according to the Debian manpage for read */
count = SSIZE_MAX;
retry:
result = read (fd, buf, count);
if (result < 0)
{
*bytes_read = 0;
switch (errno)
{
#ifdef EINTR
case EINTR:
goto retry;
#endif
#ifdef EAGAIN
case EAGAIN:
return G_IO_STATUS_AGAIN;
#endif
default:
return G_IO_STATUS_ERROR;
}
}
*bytes_read = result;
return (result > 0) ? G_IO_STATUS_NORMAL : G_IO_STATUS_EOF;
}
void g_io_channel_close (GIOChannel *channel)
{
int fd = channel->fd;
close(fd);
memset(channel, 0, sizeof(channel));
free(channel);
}
GIOChannel* g_io_channel_unix_new (int fd)
{
GIOChannel *channel = malloc(sizeof(GIOChannel));
channel->fd = fd;
return channel;
}
gint g_io_channel_unix_get_fd (GIOChannel *channel)
{
return channel->fd;
}
struct watch {
guint id;
GIOChannel *channel;
GIOCondition condition;
GIOFunc func;
gpointer user_data;
struct watch *next;
};
static struct watch watch_head = { .id = 0, .next = 0 };
guint g_io_add_watch (GIOChannel *channel,
GIOCondition condition,
GIOFunc func,
gpointer user_data)
{
struct watch *watch = malloc(sizeof(struct watch));
watch->id = ++watch_head.id;
watch->channel = channel;
watch->condition = condition;
watch->func = func;
watch->user_data = user_data;
watch->next = watch_head.next;
watch_head.next = watch;
return watch->id;
}
GMainLoop *g_main_loop_new (GMainContext *context,
gboolean is_running)
{
GMainLoop *ml = malloc(sizeof(GMainLoop));
ml->bail = 0;
return ml;
}
void g_main_loop_run (GMainLoop *loop)
{
int open_max = sysconf(_SC_OPEN_MAX);
struct pollfd *ufds = malloc(open_max * sizeof(struct pollfd));
while (!loop->bail) {
int nfds, rc, i;
struct watch *p, *w;
nfds = 0;
for (w = watch_head.next; w != NULL; w = w->next) {
ufds[nfds].fd = w->channel->fd;
ufds[nfds].events = w->condition;
ufds[nfds].revents = 0;
nfds++;
}
rc = poll(ufds, nfds, -1);
if (rc < 0 && (errno == EINTR))
continue;
if (rc < 0) {
perror("poll");
continue;
}
p = &watch_head;
w = watch_head.next;
i = 0;
while (w) {
if (ufds[i].revents) {
gboolean keep = w->func(w->channel, ufds[i].revents, w->user_data);
if (!keep) {
p->next = w->next;
memset(w, 0, sizeof(*w));
w = p->next;
i++;
continue;
}
}
p = w;
w = w->next;
i++;
}
}
}
void g_main_loop_quit (GMainLoop *loop)
{
loop->bail = 1;
}
|
