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Mini Shell
Mini Shell
/* 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"
#if TARGET_OS_IPHONE
/* iOS (currently) doesn't provide the FSEvents-API (nor CoreServices) */
int uv__fsevents_init(uv_fs_event_t* handle) {
return 0;
}
int uv__fsevents_close(uv_fs_event_t* handle) {
return 0;
}
#else /* TARGET_OS_IPHONE */
#include <assert.h>
#include <stdlib.h>
#include <CoreServices/CoreServices.h>
typedef struct uv__fsevents_event_s uv__fsevents_event_t;
struct uv__fsevents_event_s {
int events;
ngx_queue_t member;
char path[1];
};
#define UV__FSEVENTS_WALK(handle, block) \
{ \
ngx_queue_t* curr; \
ngx_queue_t split_head; \
uv__fsevents_event_t* event; \
uv_mutex_lock(&(handle)->cf_mutex); \
ngx_queue_init(&split_head); \
if (!ngx_queue_empty(&(handle)->cf_events)) { \
ngx_queue_t* split_pos = ngx_queue_next(&(handle)->cf_events); \
ngx_queue_split(&(handle)->cf_events, split_pos, &split_head); \
} \
uv_mutex_unlock(&(handle)->cf_mutex); \
while (!ngx_queue_empty(&split_head)) { \
curr = ngx_queue_head(&split_head); \
/* Invoke callback */ \
event = ngx_queue_data(curr, uv__fsevents_event_t, member); \
ngx_queue_remove(curr); \
/* Invoke block code, but only if handle wasn't closed */ \
if (((handle)->flags & (UV_CLOSING | UV_CLOSED)) == 0) \
block \
/* Free allocated data */ \
free(event); \
} \
}
void uv__fsevents_cb(uv_async_t* cb, int status) {
uv_fs_event_t* handle;
handle = cb->data;
UV__FSEVENTS_WALK(handle, {
if (handle->event_watcher.fd != -1)
handle->cb(handle, event->path[0] ? event->path : NULL, event->events, 0);
});
if ((handle->flags & (UV_CLOSING | UV_CLOSED)) == 0 &&
handle->event_watcher.fd == -1) {
uv__fsevents_close(handle);
}
}
void uv__fsevents_event_cb(ConstFSEventStreamRef streamRef,
void* info,
size_t numEvents,
void* eventPaths,
const FSEventStreamEventFlags eventFlags[],
const FSEventStreamEventId eventIds[]) {
size_t i;
int len;
char** paths;
char* path;
char* pos;
uv_fs_event_t* handle;
uv__fsevents_event_t* event;
ngx_queue_t add_list;
int kFSEventsModified;
int kFSEventsRenamed;
kFSEventsModified = kFSEventStreamEventFlagItemFinderInfoMod |
kFSEventStreamEventFlagItemModified |
kFSEventStreamEventFlagItemInodeMetaMod |
kFSEventStreamEventFlagItemChangeOwner |
kFSEventStreamEventFlagItemXattrMod;
kFSEventsRenamed = kFSEventStreamEventFlagItemCreated |
kFSEventStreamEventFlagItemRemoved |
kFSEventStreamEventFlagItemRenamed;
handle = info;
paths = eventPaths;
ngx_queue_init(&add_list);
for (i = 0; i < numEvents; i++) {
/* Ignore system events */
if (eventFlags[i] & (kFSEventStreamEventFlagUserDropped |
kFSEventStreamEventFlagKernelDropped |
kFSEventStreamEventFlagEventIdsWrapped |
kFSEventStreamEventFlagHistoryDone |
kFSEventStreamEventFlagMount |
kFSEventStreamEventFlagUnmount |
kFSEventStreamEventFlagRootChanged)) {
continue;
}
/* TODO: Report errors */
path = paths[i];
len = strlen(path);
/* Remove absolute path prefix */
if (strstr(path, handle->realpath) == path) {
path += handle->realpath_len;
len -= handle->realpath_len;
/* Skip back slash */
if (*path != 0) {
path++;
len--;
}
}
#ifdef MAC_OS_X_VERSION_10_7
/* Ignore events with path equal to directory itself */
if (len == 0)
continue;
#endif /* MAC_OS_X_VERSION_10_7 */
/* Do not emit events from subdirectories (without option set) */
pos = strchr(path, '/');
if ((handle->cf_flags & UV_FS_EVENT_RECURSIVE) == 0 &&
pos != NULL &&
pos != path + 1)
continue;
#ifndef MAC_OS_X_VERSION_10_7
path = "";
len = 0;
#endif /* MAC_OS_X_VERSION_10_7 */
event = malloc(sizeof(*event) + len);
if (event == NULL)
break;
memcpy(event->path, path, len + 1);
if ((eventFlags[i] & kFSEventsModified) != 0 &&
(eventFlags[i] & kFSEventsRenamed) == 0)
event->events = UV_CHANGE;
else
event->events = UV_RENAME;
ngx_queue_insert_tail(&add_list, &event->member);
}
uv_mutex_lock(&handle->cf_mutex);
ngx_queue_add(&handle->cf_events, &add_list);
uv_mutex_unlock(&handle->cf_mutex);
uv_async_send(handle->cf_cb);
}
void uv__fsevents_schedule(void* arg) {
uv_fs_event_t* handle;
handle = arg;
FSEventStreamScheduleWithRunLoop(handle->cf_eventstream,
handle->loop->cf_loop,
kCFRunLoopDefaultMode);
FSEventStreamStart(handle->cf_eventstream);
uv_sem_post(&handle->cf_sem);
}
int uv__fsevents_init(uv_fs_event_t* handle) {
FSEventStreamContext ctx;
FSEventStreamRef ref;
CFStringRef path;
CFArrayRef paths;
CFAbsoluteTime latency;
FSEventStreamCreateFlags flags;
/* Initialize context */
ctx.version = 0;
ctx.info = handle;
ctx.retain = NULL;
ctx.release = NULL;
ctx.copyDescription = NULL;
/* Get absolute path to file */
handle->realpath = realpath(handle->filename, NULL);
if (handle->realpath != NULL)
handle->realpath_len = strlen(handle->realpath);
/* Initialize paths array */
path = CFStringCreateWithCString(NULL,
handle->filename,
CFStringGetSystemEncoding());
paths = CFArrayCreate(NULL, (const void**)&path, 1, NULL);
latency = 0.15;
/* Set appropriate flags */
flags = kFSEventStreamCreateFlagFileEvents;
ref = FSEventStreamCreate(NULL,
&uv__fsevents_event_cb,
&ctx,
paths,
kFSEventStreamEventIdSinceNow,
latency,
flags);
handle->cf_eventstream = ref;
/*
* Events will occur in other thread.
* Initialize callback for getting them back into event loop's thread
*/
handle->cf_cb = malloc(sizeof(*handle->cf_cb));
if (handle->cf_cb == NULL)
return uv__set_sys_error(handle->loop, ENOMEM);
handle->cf_cb->data = handle;
uv_async_init(handle->loop, handle->cf_cb, uv__fsevents_cb);
handle->cf_cb->flags |= UV__HANDLE_INTERNAL;
uv_unref((uv_handle_t*) handle->cf_cb);
uv_mutex_init(&handle->cf_mutex);
uv_sem_init(&handle->cf_sem, 0);
ngx_queue_init(&handle->cf_events);
uv__cf_loop_signal(handle->loop, uv__fsevents_schedule, handle);
return 0;
}
int uv__fsevents_close(uv_fs_event_t* handle) {
if (handle->cf_eventstream == NULL)
return -1;
/* Ensure that event stream was scheduled */
uv_sem_wait(&handle->cf_sem);
/* Stop emitting events */
FSEventStreamStop(handle->cf_eventstream);
/* Release stream */
FSEventStreamInvalidate(handle->cf_eventstream);
FSEventStreamRelease(handle->cf_eventstream);
handle->cf_eventstream = NULL;
uv_close((uv_handle_t*) handle->cf_cb, (uv_close_cb) free);
/* Free data in queue */
UV__FSEVENTS_WALK(handle, {
/* NOP */
})
uv_mutex_destroy(&handle->cf_mutex);
uv_sem_destroy(&handle->cf_sem);
free(handle->realpath);
handle->realpath = NULL;
handle->realpath_len = 0;
return 0;
}
#endif /* TARGET_OS_IPHONE */
Zerion Mini Shell 1.0