//---------------------------------------------------------------------------------------------------------
void add_cut(struct list_head *cut_list, unsigned start, unsigned end)
{
struct TS_cut *cutitem;
cutitem = malloc(sizeof(*cutitem));
CLEAR_MEM(cutitem);
list_add_tail(&cutitem->next, cut_list);
cutitem->start = start ;
cutitem->end = end ;
cutitem->magic = TS_SKIP_MAGIC ;
}
/* LIB7_Poll:
*
* The version of the polling operation for systems that provide SVR4 polling.
*/
static lib7_val_t LIB7_Poll (lib7_state_t *lib7_state, lib7_val_t poll_list, struct timeval *timeout)
{
int tout;
struct pollfd* fds;
struct pollfd* fdp;
int nfds, i, flag;
lib7_val_t l, item;
if (timeout == NULL)
tout = -1;
else
/* Convert to miliseconds: */
tout = (timeout->tv_sec * 1000) + (timeout->tv_usec / 1000);
/* Count the number of polling items:
*/
for (l = poll_list, nfds = 0; l != LIST_nil; l = LIST_tl(l))
nfds++;
/* Allocate the fds vector: */
fds = NEW_VEC(struct pollfd, nfds);
CLEAR_MEM (fds, sizeof(struct pollfd)*nfds);
/* Initialize the polling descriptors:
*/
for (l = poll_list, fdp = fds; l != LIST_nil; l = LIST_tl(l), fdp++) {
item = LIST_hd(l);
fdp->fd = REC_SELINT(item, 0);
flag = REC_SELINT(item, 1);
if ((flag & READABLE_BIT) != 0) fdp->events |= POLLIN;
if ((flag & WRITABLE_BIT) != 0) fdp->events |= POLLOUT;
if ((flag & OOBDABLE_BIT) != 0) fdp->events |= POLL_ERROR;
}
{ int status;
/* do { */ /* Backed out 2010-02-26 CrT: See discussion at bottom of src/runtime/c-libs/lib7-socket/connect.c */
status = poll (fds, nfds, tout);
/* } while (status < 0 && errno == EINTR); */ /* Restart if interrupted by a SIGALRM or SIGCHLD or whatever. */
if (status < 0) {
FREE(fds);
return RAISE_SYSERR(lib7_state, status);
}
else {
for (i = nfds-1, l = LIST_nil; i >= 0; i--) {
fdp = &(fds[i]);
if (fdp->revents != 0) {
flag = 0;
if ((fdp->revents & POLLIN ) != 0) flag |= READABLE_BIT;
if ((fdp->revents & POLLOUT ) != 0) flag |= WRITABLE_BIT;
if ((fdp->revents & POLL_ERROR) != 0) flag |= OOBDABLE_BIT;
REC_ALLOC2(lib7_state, item, INT_CtoLib7(fdp->fd), INT_CtoLib7(flag));
LIST_cons(lib7_state, l, item, l);
}
}
FREE(fds);
return l;
}
}
}
