2 * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
12 #include <sys/types.h>
14 #include "user_util.h"
15 #include "kern_util.h"
22 static struct pollfd
*pollfds
= NULL
;
23 static int pollfds_num
= 0;
24 static int pollfds_size
= 0;
26 int os_waiting_for_events(struct irq_fd
*active_fds
)
28 struct irq_fd
*irq_fd
;
31 n
= poll(pollfds
, pollfds_num
, 0);
35 printk("sigio_handler: os_waiting_for_events:"
36 " poll returned %d, errno = %d\n", n
, errno
);
45 for (i
= 0; i
< pollfds_num
; i
++) {
46 if (pollfds
[i
].revents
!= 0) {
47 irq_fd
->current_events
= pollfds
[i
].revents
;
50 irq_fd
= irq_fd
->next
;
55 int os_create_pollfd(int fd
, int events
, void *tmp_pfd
, int size_tmpfds
)
57 if (pollfds_num
== pollfds_size
) {
58 if (size_tmpfds
<= pollfds_size
* sizeof(pollfds
[0])) {
59 /* return min size needed for new pollfds area */
60 return((pollfds_size
+ 1) * sizeof(pollfds
[0]));
63 if (pollfds
!= NULL
) {
64 memcpy(tmp_pfd
, pollfds
,
65 sizeof(pollfds
[0]) * pollfds_size
);
66 /* remove old pollfds */
72 kfree(tmp_pfd
); /* remove not used tmp_pfd */
74 pollfds
[pollfds_num
] = ((struct pollfd
) { .fd
= fd
,
82 void os_free_irq_by_cb(int (*test
)(struct irq_fd
*, void *), void *arg
,
83 struct irq_fd
*active_fds
, struct irq_fd
***last_irq_ptr2
)
89 while (*prev
!= NULL
) {
90 if ((*test
)(*prev
, arg
)) {
91 struct irq_fd
*old_fd
= *prev
;
92 if ((pollfds
[i
].fd
!= -1) &&
93 (pollfds
[i
].fd
!= (*prev
)->fd
)) {
94 printk("os_free_irq_by_cb - mismatch between "
95 "active_fds and pollfds, fd %d vs %d\n",
96 (*prev
)->fd
, pollfds
[i
].fd
);
102 /* This moves the *whole* array after pollfds[i]
103 * (though it doesn't spot as such)!
105 memmove(&pollfds
[i
], &pollfds
[i
+ 1],
106 (pollfds_num
- i
) * sizeof(pollfds
[0]));
107 if(*last_irq_ptr2
== &old_fd
->next
)
108 *last_irq_ptr2
= prev
;
110 *prev
= (*prev
)->next
;
111 if(old_fd
->type
== IRQ_WRITE
)
112 ignore_sigio_fd(old_fd
->fd
);
116 prev
= &(*prev
)->next
;
123 int os_get_pollfd(int i
)
125 return pollfds
[i
].fd
;
128 void os_set_pollfd(int i
, int fd
)
133 void os_set_ioignore(void)
135 set_handler(SIGIO
, SIG_IGN
, 0, -1);
138 void init_irq_signals(int on_sigstack
)
142 flags
= on_sigstack
? SA_ONSTACK
: 0;
144 set_handler(SIGVTALRM
, (__sighandler_t
) alarm_handler
,
145 flags
| SA_RESTART
, SIGUSR1
, SIGIO
, SIGWINCH
, SIGALRM
, -1);
146 set_handler(SIGALRM
, (__sighandler_t
) alarm_handler
,
147 flags
| SA_RESTART
, SIGUSR1
, SIGIO
, SIGWINCH
, SIGALRM
, -1);
148 set_handler(SIGIO
, (__sighandler_t
) sig_handler
, flags
| SA_RESTART
,
149 SIGUSR1
, SIGIO
, SIGWINCH
, SIGALRM
, SIGVTALRM
, -1);
150 signal(SIGWINCH
, SIG_IGN
);