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Merge remote-tracking branch 'origin/patches-2.0'

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This commit is contained in:
Nick Mathewson 2011-06-16 13:28:40 -04:00
commit 89def5391e
1 changed files with 47 additions and 20 deletions
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67
kqueue.c
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@ -50,8 +50,10 @@
* easy way to tell them apart via autoconf, so we need to use OS macros. */
#if defined(_EVENT_HAVE_INTTYPES_H) && !defined(__OpenBSD__) && !defined(__FreeBSD__) && !defined(__darwin__) && !defined(__APPLE__)
#define PTR_TO_UDATA(x) ((intptr_t)(x))
#define INT_TO_UDATA(x) ((intptr_t)(x))
#else
#define PTR_TO_UDATA(x) (x)
#define INT_TO_UDATA(x) ((void*)(x))
#endif
#include "event-internal.h"
@ -168,6 +170,8 @@ kq_sighandler(int sig)
/* Do nothing here */
}
#define ADD_UDATA 0x30303
static void
kq_setup_kevent(struct kevent *out, evutil_socket_t fd, int filter, short change)
{
@ -177,6 +181,9 @@ kq_setup_kevent(struct kevent *out, evutil_socket_t fd, int filter, short change
if (change & EV_CHANGE_ADD) {
out->flags = EV_ADD;
/* We set a magic number here so that we can tell 'add'
* errors from 'del' errors. */
out->udata = INT_TO_UDATA(ADD_UDATA);
if (change & EV_ET)
out->flags |= EV_CLEAR;
#ifdef NOTE_EOF
@ -315,27 +322,47 @@ kq_dispatch(struct event_base *base, struct timeval *tv)
int which = 0;
if (events[i].flags & EV_ERROR) {
/*
* Error messages that can happen, when a delete fails.
* EBADF happens when the file descriptor has been
* closed,
* ENOENT when the file descriptor was closed and
* then reopened.
* EINVAL for some reasons not understood; EINVAL
* should not be returned ever; but FreeBSD does :-\
* An error is also indicated when a callback deletes
* an event we are still processing. In that case
* the data field is set to ENOENT.
*/
if (events[i].data == EBADF ||
events[i].data == EINVAL ||
events[i].data == ENOENT)
continue;
errno = events[i].data;
return (-1);
}
switch (events[i].data) {
if (events[i].filter == EVFILT_READ) {
/* Can occur on delete if we are not currently
* watching any events on this fd. That can
* happen when the fd was closed and another
* file was opened with that fd. */
case ENOENT:
/* Can occur for reasons not fully understood
* on FreeBSD. */
case EINVAL:
continue;
/* Can occur on a delete if the fd is closed. Can
* occur on an add if the fd was one side of a pipe,
* and the other side was closed. */
case EBADF:
/* These two can occur on an add if the fd was one side
* of a pipe, and the other side was closed. */
case EPERM:
case EPIPE:
/* Report read events, if we're listening for
* them, so that the user can learn about any
* add errors. (If the operation was a
* delete, then udata should be cleared.) */
if (events[i].udata) {
/* The operation was an add:
* report the error as a read. */
which |= EV_READ;
break;
} else {
/* The operation was a del:
* report nothing. */
continue;
}
/* Other errors shouldn't occur. */
default:
errno = events[i].data;
return (-1);
}
} else if (events[i].filter == EVFILT_READ) {
which |= EV_READ;
} else if (events[i].filter == EVFILT_WRITE) {
which |= EV_WRITE;