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@isaacs isaacs/kqueue.c
Created Apr 17, 2012

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/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include "uv.h"
#include "internal.h"
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/sysctl.h>
#include <sys/types.h>
#include <sys/event.h>
#include <unistd.h>
#include <fcntl.h>
#include <time.h>
static void uv__fs_event(EV_P_ ev_io* w, int revents);
static void uv__fs_event_start(uv_fs_event_t* handle) {
ev_io_init(&handle->event_watcher,
uv__fs_event,
handle->fd,
EV_LIBUV_KQUEUE_HACK);
ev_io_start(handle->loop->ev, &handle->event_watcher);
ev_unref(handle->loop->ev);
}
static void uv__fs_event_stop(uv_fs_event_t* handle) {
ev_ref(handle->loop->ev);
ev_io_stop(handle->loop->ev, &handle->event_watcher);
}
static void uv__fs_event(EV_P_ ev_io* w, int revents) {
uv_fs_event_t* handle;
int events;
assert(revents == EV_LIBUV_KQUEUE_HACK);
handle = container_of(w, uv_fs_event_t, event_watcher);
if (handle->fflags & (NOTE_ATTRIB | NOTE_EXTEND))
events = UV_CHANGE;
else
events = UV_RENAME;
handle->cb(handle, NULL, events, 0);
if (handle->fd == -1)
return;
/* File watcher operates in one-shot mode, re-arm it. */
uv__fs_event_stop(handle);
uv__fs_event_start(handle);
}
/* Called by libev, don't touch. */
void uv__kqueue_hack(EV_P_ int fflags, ev_io *w) {
uv_fs_event_t* handle;
handle = container_of(w, uv_fs_event_t, event_watcher);
handle->fflags = fflags;
}
int uv_fs_event_init(uv_loop_t* loop,
uv_fs_event_t* handle,
const char* filename,
uv_fs_event_cb cb,
int flags) {
int fd;
loop->counters.fs_event_init++;
/* We don't support any flags yet. */
assert(!flags);
if (cb == NULL) {
uv__set_sys_error(loop, EINVAL);
return -1;
}
/* TODO open asynchronously - but how do we report back errors? */
if ((fd = open(filename, O_RDONLY)) == -1) {
uv__set_sys_error(loop, errno);
return -1;
}
uv__handle_init(loop, (uv_handle_t*)handle, UV_FS_EVENT);
handle->filename = strdup(filename);
handle->fflags = 0;
handle->cb = cb;
handle->fd = fd;
uv__fs_event_start(handle);
return 0;
}
void uv__fs_event_destroy(uv_fs_event_t* handle) {
uv__fs_event_stop(handle);
free(handle->filename);
close(handle->fd);
handle->fd = -1;
}
<<<<<<< HEAD
#else /* !HAVE_KQUEUE */
int uv_fs_event_init(uv_loop_t* loop,
uv_fs_event_t* handle,
const char* filename,
uv_fs_event_cb cb,
int flags) {
loop->counters.fs_event_init++;
uv__set_sys_error(loop, ENOSYS);
return -1;
}
void uv__fs_event_destroy(uv_fs_event_t* handle) {
UNREACHABLE();
}
/* Called by libev, don't touch. */
void uv__kqueue_hack(EV_P_ int fflags, ev_io *w) {
UNREACHABLE();
}
#endif /* HAVE_KQUEUE */
=======
>>>>>>> 3c41597... unix: don't conditionally compile kqueue fs watcher
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