static void *fsel_producer(void *data)
{
const struct timespec interval = { 0, 250000000 };
unsigned idx = 0, nr = 1;
(void) data;
while (1) {
int i, t;
pthread_mutex_lock(&fsel_mutex);
/*
* This is the main producer loop which is executed
* ever 500ms. On each iteration, it fills one byte
* to 1, 2 or 4 files and sends poll notification if
* requested.
*/
for (i = 0, t = idx; i < nr;
i++, t = (t + FSEL_FILES / nr) % FSEL_FILES) {
if (fsel_cnt[t] == FSEL_CNT_MAX)
continue;
fsel_cnt[t]++;
if (fsel_fuse && (fsel_poll_notify_mask & (1 << t))) {
struct fuse_pollhandle *ph;
printf("NOTIFY %X\n", t);
ph = fsel_poll_handle[t];
fuse_notify_poll(ph);
fuse_pollhandle_destroy(ph);
fsel_poll_notify_mask &= ~(1 << t);
fsel_poll_handle[t] = NULL;
}
}
idx = (idx + 1) % FSEL_FILES;
if (idx == 0)
nr = (nr * 2) % 7; /* cycle through 1, 2 and 4 */
pthread_mutex_unlock(&fsel_mutex);
nanosleep(&interval, NULL);
}
return NULL;
}
static int fsel_poll(const char *path, struct fuse_file_info *fi,
struct fuse_pollhandle *ph, unsigned *reventsp)
{
static unsigned polled_zero;
int idx = fi->fh;
(void) path;
/*
* Poll notification requires pointer to struct fuse which
* can't be obtained when using fuse_main(). As notification
* happens only after poll is called, fill it here from
* fuse_context.
*/
if (!fsel_fuse) {
struct fuse_context *cxt = fuse_get_context();
if (cxt)
fsel_fuse = cxt->fuse;
}
pthread_mutex_lock(&fsel_mutex);
if (ph != NULL) {
struct fuse_pollhandle *oldph = fsel_poll_handle[idx];
if (oldph)
fuse_pollhandle_destroy(oldph);
fsel_poll_notify_mask |= (1 << idx);
fsel_poll_handle[idx] = ph;
}
if (fsel_cnt[idx]) {
*reventsp |= POLLIN;
printf("POLL %X cnt=%u polled_zero=%u\n",
idx, fsel_cnt[idx], polled_zero);
polled_zero = 0;
} else
polled_zero++;
pthread_mutex_unlock(&fsel_mutex);
return 0;
}
static int pollhandle_destroy(struct fuse_pollhandle *ph)
{
fuse_pollhandle_destroy(ph);
return 0;
}