* - wrappers for poll(2)
*/
/*
- * This file is part of adns, which is Copyright (C) 1997-1999 Ian Jackson
+ * This file is part of adns, which is
+ * Copyright (C) 1997-2000,2003,2006 Ian Jackson
+ * Copyright (C) 1999-2000,2003,2006 Tony Finch
+ * Copyright (C) 1991 Massachusetts Institute of Technology
+ * (See the file INSTALL for full details.)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
*/
#include <limits.h>
+#include <string.h>
#include "internal.h"
#ifdef HAVE_POLL
-int adns_beforepoll(adns_state ads, struct pollfd *fds, int *nfds_io, int *timeout_io,
- const struct timeval *now) {
+int adns_beforepoll(adns_state ads, struct pollfd *fds, int *nfds_io,
+ int *timeout_io, const struct timeval *now) {
struct timeval tv_nowbuf, tv_tobuf, *tv_to;
- int space, found, timeout_ms;
+ int space, found, timeout_ms, r;
struct pollfd fds_tmp[MAX_POLLFDS];
+ adns__consistency(ads,0,cc_entex);
+
if (timeout_io) {
adns__must_gettimeofday(ads,&now,&tv_nowbuf);
- if (!now) { *nfds_io= 0; return 0; }
+ if (!now) { *nfds_io= 0; r= 0; goto xit; }
timeout_ms= *timeout_io;
if (timeout_ms == -1) {
} else {
found= adns__pollfds(ads,fds_tmp);
*nfds_io= found;
- if (space < found) return ERANGE;
+ if (space < found) { r= ERANGE; goto xit; }
memcpy(fds,fds_tmp,sizeof(struct pollfd)*found);
}
- return 0;
+ r= 0;
+xit:
+ adns__consistency(ads,0,cc_entex);
+ return r;
}
void adns_afterpoll(adns_state ads, const struct pollfd *fds, int nfds,
const struct timeval *now) {
struct timeval tv_buf;
+ adns__consistency(ads,0,cc_entex);
adns__must_gettimeofday(ads,&now,&tv_buf);
- if (!now) return;
+ if (now) {
+ adns__timeouts(ads, 1, 0,0, *now);
+ adns__fdevents(ads, fds,nfds, 0,0,0,0, *now,0);
+ }
+ adns__consistency(ads,0,cc_entex);
+}
+
+int adns_wait_poll(adns_state ads,
+ adns_query *query_io,
+ adns_answer **answer_r,
+ void **context_r) {
+ int r, nfds, to;
+ struct pollfd fds[MAX_POLLFDS];
+
+ adns__consistency(ads,0,cc_entex);
+
+ for (;;) {
+ r= adns__internal_check(ads,query_io,answer_r,context_r);
+ if (r != EAGAIN) goto xit;
+ nfds= MAX_POLLFDS; to= -1;
+ adns_beforepoll(ads,fds,&nfds,&to,0);
+ r= poll(fds,nfds,to);
+ if (r == -1) {
+ if (errno == EINTR) {
+ if (ads->iflags & adns_if_eintr) { r= EINTR; goto xit; }
+ } else {
+ adns__diag(ads,-1,0,"poll failed in wait: %s",strerror(errno));
+ adns_globalsystemfailure(ads);
+ }
+ } else {
+ assert(r >= 0);
+ adns_afterpoll(ads,fds,nfds,0);
+ }
+ }
- adns__timeouts(ads, 1, 0,0, *now);
- adns__fdevents(ads, fds,nfds, 0,0,0,0, *now,0);
+ xit:
+ adns__consistency(ads,0,cc_entex);
+ return r;
}
#endif