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Merge branch 'safetimevalms'

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This commit is contained in:
Christopher Davis 2010-04-10 11:26:53 -07:00
commit fd90274056
5 changed files with 39 additions and 18 deletions
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18
epoll.c
View File

@ -35,6 +35,7 @@
#include <sys/queue.h>
#include <sys/epoll.h>
#include <signal.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@ -269,15 +270,16 @@ epoll_dispatch(struct event_base *base, struct timeval *tv)
{
struct epollop *epollop = base->evbase;
struct epoll_event *events = epollop->events;
int i, res, timeout = -1;
int i, res;
long timeout = -1;
if (tv != NULL)
timeout = tv->tv_sec * 1000 + (tv->tv_usec + 999) / 1000;
if (timeout > MAX_EPOLL_TIMEOUT_MSEC) {
/* Linux kernels can wait forever if the timeout is too big;
* see comment on MAX_EPOLL_TIMEOUT_MSEC. */
timeout = MAX_EPOLL_TIMEOUT_MSEC;
if (tv != NULL) {
timeout = evutil_tv_to_msec(tv);
if (timeout < 0 || timeout > MAX_EPOLL_TIMEOUT_MSEC) {
/* Linux kernels can wait forever if the timeout is
* too big; see comment on MAX_EPOLL_TIMEOUT_MSEC. */
timeout = MAX_EPOLL_TIMEOUT_MSEC;
}
}
epoll_apply_changes(base);

13
evutil.c
View File

@ -52,6 +52,7 @@
#include <stdlib.h>
#endif
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>
#ifdef _EVENT_HAVE_ARPA_INET_H
@ -1894,3 +1895,15 @@ evutil_sockaddr_is_loopback(const struct sockaddr *addr)
return 0;
}
#define MAX_SECONDS_IN_MSEC_LONG \
(((LONG_MAX) - 999) / 1000)
long
evutil_tv_to_msec(const struct timeval *tv)
{
if (tv->tv_usec > 1000000 || tv->tv_sec > MAX_SECONDS_IN_MSEC_LONG)
return -1;
return (tv->tv_sec * 1000) + ((tv->tv_usec + 999) / 1000);
}

11
poll.c
View File

@ -35,6 +35,7 @@
#include <sys/queue.h>
#include <poll.h>
#include <signal.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@ -117,7 +118,8 @@ poll_check_ok(struct pollop *pop)
static int
poll_dispatch(struct event_base *base, struct timeval *tv)
{
int res, i, j, msec = -1, nfds;
int res, i, j, nfds;
long msec = -1;
struct pollop *pop = base->evbase;
struct pollfd *event_set;
@ -152,8 +154,11 @@ poll_dispatch(struct event_base *base, struct timeval *tv)
event_set = pop->event_set;
#endif
if (tv != NULL)
msec = tv->tv_sec * 1000 + (tv->tv_usec + 999) / 1000;
if (tv != NULL) {
msec = evutil_tv_to_msec(tv);
if (msec < 0 || msec > INT_MAX)
msec = INT_MAX;
}
EVBASE_RELEASE_LOCK(base, th_base_lock);

2
util-internal.h
View File

@ -213,6 +213,8 @@ int evutil_getaddrinfo_async(struct evdns_base *dns_base,
* ::1). */
int evutil_sockaddr_is_loopback(const struct sockaddr *sa);
long evutil_tv_to_msec(const struct timeval *tv);
#ifdef __cplusplus
}
#endif

13
win32select.c
View File

@ -30,6 +30,7 @@
#include <windows.h>
#include <sys/types.h>
#include <sys/queue.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
@ -114,12 +115,6 @@ realloc_fd_sets(struct win32op *op, size_t new_size)
return (0);
}
static int
timeval_to_ms(struct timeval *tv)
{
return ((tv->tv_sec * 1000) + (tv->tv_usec / 1000));
}
static int
do_fd_set(struct win32op *op, struct idx_info *ent, evutil_socket_t s, int read)
{
@ -303,8 +298,12 @@ win32_dispatch(struct event_base *base, struct timeval *tv)
win32op->readset_out->fd_count : win32op->writeset_out->fd_count;
if (!fd_count) {
long msec = evutil_tv_to_msec(tv);
/* Sleep's DWORD argument is unsigned long */
if (msec < 0)
msec = LONG_MAX;
/* Windows doesn't like you to call select() with no sockets */
Sleep(timeval_to_ms(tv));
Sleep(msec);
evsig_process(base);
return (0);
}