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add waituntil and waituntil2 (internal)

master
Felix von Leitner 18 years ago
parent
commit
d8d68112b8
  1. 15
      io/io_waituntil.c
  2. 39
      io/io_waituntil2.c

15
io/io_waituntil.c

@ -0,0 +1,15 @@
#include <unistd.h>
#include <sys/time.h>
#include <poll.h>
#include <errno.h>
#include "io_internal.h"
#include "safemult.h"
void io_waituntil(tai6464 t) {
uint64 x,y;
tai6464 now;
taia_now(&now);
if (!umult64(now.sec.x,1000,&x) || (y=x+now.nano/10000000)<x)
y=-1; /* overflow; wait indefinitely */
io_waituntil2(y);
}

39
io/io_waituntil2.c

@ -0,0 +1,39 @@
#include <unistd.h>
#include <sys/time.h>
#include <poll.h>
#include <errno.h>
#include "io_internal.h"
int64 io_waituntil2(int64 milliseconds) {
struct pollfd* p;
long i,r;
if (!io_wanted_fds) return 0;
for (i=r=0; i<array_length(&io_fds,sizeof(io_entry)); ++i) {
io_entry* e=array_get(&io_fds,sizeof(io_entry),i);
if (!e) return -1;
e->canread=e->canwrite=0;
if (e->wantread || e->wantwrite) {
struct pollfd* p;
if ((p=array_allocate(&io_pollfds,sizeof(struct pollfd),r))) {
p->fd=i;
p->events=(e->wantread?POLLIN:0) + (e->wantwrite?POLLOUT:0);
++r;
} else
return -1;
}
}
p=array_start(&io_pollfds);
again:
while ((i=poll(array_start(&io_pollfds),r,milliseconds))==0);
if (i==-1) {
if (errno==EINTR) goto again;
return -1;
}
for (i=0; i<r; ++i) {
io_entry* e=array_get(&io_fds,sizeof(io_entry),p->fd);
if (p->revents&POLLIN) e->canread=1;
if (p->revents&POLLOUT) e->canwrite=1;
p++;
}
return i;
}
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