diff options
Diffstat (limited to '3rdparty/libuv/src/unix/linux-inotify.c')
-rw-r--r-- | 3rdparty/libuv/src/unix/linux-inotify.c | 285 |
1 files changed, 0 insertions, 285 deletions
diff --git a/3rdparty/libuv/src/unix/linux-inotify.c b/3rdparty/libuv/src/unix/linux-inotify.c deleted file mode 100644 index 282912115d8..00000000000 --- a/3rdparty/libuv/src/unix/linux-inotify.c +++ /dev/null @@ -1,285 +0,0 @@ -/* 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 "tree.h" -#include "internal.h" - -#include <stdint.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <assert.h> -#include <errno.h> - -#include <sys/types.h> -#include <unistd.h> - -struct watcher_list { - RB_ENTRY(watcher_list) entry; - QUEUE watchers; - int iterating; - char* path; - int wd; -}; - -struct watcher_root { - struct watcher_list* rbh_root; -}; -#define CAST(p) ((struct watcher_root*)(p)) - - -static int compare_watchers(const struct watcher_list* a, - const struct watcher_list* b) { - if (a->wd < b->wd) return -1; - if (a->wd > b->wd) return 1; - return 0; -} - - -RB_GENERATE_STATIC(watcher_root, watcher_list, entry, compare_watchers) - - -static void uv__inotify_read(uv_loop_t* loop, - uv__io_t* w, - unsigned int revents); - - -static int new_inotify_fd(void) { - int err; - int fd; - - fd = uv__inotify_init1(UV__IN_NONBLOCK | UV__IN_CLOEXEC); - if (fd != -1) - return fd; - - if (errno != ENOSYS) - return -errno; - - fd = uv__inotify_init(); - if (fd == -1) - return -errno; - - err = uv__cloexec(fd, 1); - if (err == 0) - err = uv__nonblock(fd, 1); - - if (err) { - uv__close(fd); - return err; - } - - return fd; -} - - -static int init_inotify(uv_loop_t* loop) { - int err; - - if (loop->inotify_fd != -1) - return 0; - - err = new_inotify_fd(); - if (err < 0) - return err; - - loop->inotify_fd = err; - uv__io_init(&loop->inotify_read_watcher, uv__inotify_read, loop->inotify_fd); - uv__io_start(loop, &loop->inotify_read_watcher, UV__POLLIN); - - return 0; -} - - -static struct watcher_list* find_watcher(uv_loop_t* loop, int wd) { - struct watcher_list w; - w.wd = wd; - return RB_FIND(watcher_root, CAST(&loop->inotify_watchers), &w); -} - -static void maybe_free_watcher_list(struct watcher_list* w, uv_loop_t* loop) { - /* if the watcher_list->watchers is being iterated over, we can't free it. */ - if ((!w->iterating) && QUEUE_EMPTY(&w->watchers)) { - /* No watchers left for this path. Clean up. */ - RB_REMOVE(watcher_root, CAST(&loop->inotify_watchers), w); - uv__inotify_rm_watch(loop->inotify_fd, w->wd); - uv__free(w); - } -} - -static void uv__inotify_read(uv_loop_t* loop, - uv__io_t* dummy, - unsigned int events) { - const struct uv__inotify_event* e; - struct watcher_list* w; - uv_fs_event_t* h; - QUEUE queue; - QUEUE* q; - const char* path; - ssize_t size; - const char *p; - /* needs to be large enough for sizeof(inotify_event) + strlen(path) */ - char buf[4096]; - - while (1) { - do - size = read(loop->inotify_fd, buf, sizeof(buf)); - while (size == -1 && errno == EINTR); - - if (size == -1) { - assert(errno == EAGAIN || errno == EWOULDBLOCK); - break; - } - - assert(size > 0); /* pre-2.6.21 thing, size=0 == read buffer too small */ - - /* Now we have one or more inotify_event structs. */ - for (p = buf; p < buf + size; p += sizeof(*e) + e->len) { - e = (const struct uv__inotify_event*)p; - - events = 0; - if (e->mask & (UV__IN_ATTRIB|UV__IN_MODIFY)) - events |= UV_CHANGE; - if (e->mask & ~(UV__IN_ATTRIB|UV__IN_MODIFY)) - events |= UV_RENAME; - - w = find_watcher(loop, e->wd); - if (w == NULL) - continue; /* Stale event, no watchers left. */ - - /* inotify does not return the filename when monitoring a single file - * for modifications. Repurpose the filename for API compatibility. - * I'm not convinced this is a good thing, maybe it should go. - */ - path = e->len ? (const char*) (e + 1) : uv__basename_r(w->path); - - /* We're about to iterate over the queue and call user's callbacks. - * What can go wrong? - * A callback could call uv_fs_event_stop() - * and the queue can change under our feet. - * So, we use QUEUE_MOVE() trick to safely iterate over the queue. - * And we don't free the watcher_list until we're done iterating. - * - * First, - * tell uv_fs_event_stop() (that could be called from a user's callback) - * not to free watcher_list. - */ - w->iterating = 1; - QUEUE_MOVE(&w->watchers, &queue); - while (!QUEUE_EMPTY(&queue)) { - q = QUEUE_HEAD(&queue); - h = QUEUE_DATA(q, uv_fs_event_t, watchers); - - QUEUE_REMOVE(q); - QUEUE_INSERT_TAIL(&w->watchers, q); - - h->cb(h, path, events, 0); - } - /* done iterating, time to (maybe) free empty watcher_list */ - w->iterating = 0; - maybe_free_watcher_list(w, loop); - } - } -} - - -int uv_fs_event_init(uv_loop_t* loop, uv_fs_event_t* handle) { - uv__handle_init(loop, (uv_handle_t*)handle, UV_FS_EVENT); - return 0; -} - - -int uv_fs_event_start(uv_fs_event_t* handle, - uv_fs_event_cb cb, - const char* path, - unsigned int flags) { - struct watcher_list* w; - int events; - int err; - int wd; - - if (uv__is_active(handle)) - return -EINVAL; - - err = init_inotify(handle->loop); - if (err) - return err; - - events = UV__IN_ATTRIB - | UV__IN_CREATE - | UV__IN_MODIFY - | UV__IN_DELETE - | UV__IN_DELETE_SELF - | UV__IN_MOVE_SELF - | UV__IN_MOVED_FROM - | UV__IN_MOVED_TO; - - wd = uv__inotify_add_watch(handle->loop->inotify_fd, path, events); - if (wd == -1) - return -errno; - - w = find_watcher(handle->loop, wd); - if (w) - goto no_insert; - - w = uv__malloc(sizeof(*w) + strlen(path) + 1); - if (w == NULL) - return -ENOMEM; - - w->wd = wd; - w->path = strcpy((char*)(w + 1), path); - QUEUE_INIT(&w->watchers); - w->iterating = 0; - RB_INSERT(watcher_root, CAST(&handle->loop->inotify_watchers), w); - -no_insert: - uv__handle_start(handle); - QUEUE_INSERT_TAIL(&w->watchers, &handle->watchers); - handle->path = w->path; - handle->cb = cb; - handle->wd = wd; - - return 0; -} - - -int uv_fs_event_stop(uv_fs_event_t* handle) { - struct watcher_list* w; - - if (!uv__is_active(handle)) - return 0; - - w = find_watcher(handle->loop, handle->wd); - assert(w != NULL); - - handle->wd = -1; - handle->path = NULL; - uv__handle_stop(handle); - QUEUE_REMOVE(&handle->watchers); - - maybe_free_watcher_list(w, handle->loop); - - return 0; -} - - -void uv__fs_event_close(uv_fs_event_t* handle) { - uv_fs_event_stop(handle); -} |