1 | /* GIO - GLib Input, Output and Streaming Library |
2 | * |
3 | * Copyright (C) 2006-2007 Red Hat, Inc. |
4 | * |
5 | * This library is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU Lesser General Public |
7 | * License as published by the Free Software Foundation; either |
8 | * version 2.1 of the License, or (at your option) any later version. |
9 | * |
10 | * This library is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | * Lesser General Public License for more details. |
14 | * |
15 | * You should have received a copy of the GNU Lesser General |
16 | * Public License along with this library; if not, see <http://www.gnu.org/licenses/>. |
17 | * |
18 | * Author: Alexander Larsson <alexl@redhat.com> |
19 | */ |
20 | |
21 | #include "config.h" |
22 | |
23 | #include "gioenumtypes.h" |
24 | #include "glocalfilemonitor.h" |
25 | #include "giomodule-priv.h" |
26 | #include "gioerror.h" |
27 | #include "glibintl.h" |
28 | #include "glocalfile.h" |
29 | #include "glib-private.h" |
30 | |
31 | #include <string.h> |
32 | |
33 | #define DEFAULT_RATE_LIMIT 800 * G_TIME_SPAN_MILLISECOND |
34 | #define VIRTUAL_CHANGES_DONE_DELAY 2 * G_TIME_SPAN_SECOND |
35 | |
36 | /* GFileMonitorSource is a GSource responsible for emitting the changed |
37 | * signals in the owner-context of the GFileMonitor. |
38 | * |
39 | * It contains functionality for cross-thread queuing of events. It |
40 | * also handles merging of CHANGED events and emission of CHANGES_DONE |
41 | * events. |
42 | * |
43 | * We use the "priv" pointer in the external struct to store it. |
44 | */ |
45 | struct _GFileMonitorSource { |
46 | GSource source; |
47 | |
48 | GMutex lock; |
49 | GWeakRef instance_ref; |
50 | GFileMonitorFlags flags; |
51 | gchar *dirname; |
52 | gchar *basename; |
53 | gchar *filename; |
54 | GSequence *pending_changes; /* sorted by ready time */ |
55 | GHashTable *pending_changes_table; |
56 | GQueue event_queue; |
57 | gint64 rate_limit; |
58 | }; |
59 | |
60 | /* PendingChange is a struct to keep track of a file that needs to have |
61 | * (at least) a CHANGES_DONE_HINT event sent for it in the near future. |
62 | * |
63 | * If 'dirty' is TRUE then a CHANGED event also needs to be sent. |
64 | * |
65 | * last_emission is the last time a CHANGED event was emitted. It is |
66 | * used to calculate the time to send the next event. |
67 | */ |
68 | typedef struct { |
69 | gchar *child; |
70 | guint64 last_emission : 63; |
71 | guint64 dirty : 1; |
72 | } PendingChange; |
73 | |
74 | /* QueuedEvent is a signal that will be sent immediately, as soon as the |
75 | * source gets a chance to dispatch. The existence of any queued event |
76 | * implies that the source is ready now. |
77 | */ |
78 | typedef struct |
79 | { |
80 | GFileMonitorEvent event_type; |
81 | GFile *child; |
82 | GFile *other; |
83 | } QueuedEvent; |
84 | |
85 | static gint64 |
86 | pending_change_get_ready_time (const PendingChange *change, |
87 | GFileMonitorSource *fms) |
88 | { |
89 | if (change->dirty) |
90 | return change->last_emission + fms->rate_limit; |
91 | else |
92 | return change->last_emission + VIRTUAL_CHANGES_DONE_DELAY; |
93 | } |
94 | |
95 | static int |
96 | pending_change_compare_ready_time (gconstpointer a_p, |
97 | gconstpointer b_p, |
98 | gpointer user_data) |
99 | { |
100 | GFileMonitorSource *fms = user_data; |
101 | const PendingChange *a = a_p; |
102 | const PendingChange *b = b_p; |
103 | gint64 ready_time_a; |
104 | gint64 ready_time_b; |
105 | |
106 | ready_time_a = pending_change_get_ready_time (change: a, fms); |
107 | ready_time_b = pending_change_get_ready_time (change: b, fms); |
108 | |
109 | if (ready_time_a < ready_time_b) |
110 | return -1; |
111 | else |
112 | return ready_time_a > ready_time_b; |
113 | } |
114 | |
115 | static void |
116 | pending_change_free (gpointer data) |
117 | { |
118 | PendingChange *change = data; |
119 | |
120 | g_free (mem: change->child); |
121 | |
122 | g_slice_free (PendingChange, change); |
123 | } |
124 | |
125 | static void |
126 | queued_event_free (QueuedEvent *event) |
127 | { |
128 | g_object_unref (object: event->child); |
129 | if (event->other) |
130 | g_object_unref (object: event->other); |
131 | |
132 | g_slice_free (QueuedEvent, event); |
133 | } |
134 | |
135 | static gint64 |
136 | g_file_monitor_source_get_ready_time (GFileMonitorSource *fms) |
137 | { |
138 | GSequenceIter *iter; |
139 | |
140 | if (fms->event_queue.length) |
141 | return 0; |
142 | |
143 | iter = g_sequence_get_begin_iter (seq: fms->pending_changes); |
144 | if (g_sequence_iter_is_end (iter)) |
145 | return -1; |
146 | |
147 | return pending_change_get_ready_time (change: g_sequence_get (iter), fms); |
148 | } |
149 | |
150 | static void |
151 | g_file_monitor_source_update_ready_time (GFileMonitorSource *fms) |
152 | { |
153 | g_source_set_ready_time (source: (GSource *) fms, ready_time: g_file_monitor_source_get_ready_time (fms)); |
154 | } |
155 | |
156 | static GSequenceIter * |
157 | g_file_monitor_source_find_pending_change (GFileMonitorSource *fms, |
158 | const gchar *child) |
159 | { |
160 | return g_hash_table_lookup (hash_table: fms->pending_changes_table, key: child); |
161 | } |
162 | |
163 | static void |
164 | g_file_monitor_source_add_pending_change (GFileMonitorSource *fms, |
165 | const gchar *child, |
166 | gint64 now) |
167 | { |
168 | PendingChange *change; |
169 | GSequenceIter *iter; |
170 | |
171 | change = g_slice_new (PendingChange); |
172 | change->child = g_strdup (str: child); |
173 | change->last_emission = now; |
174 | change->dirty = FALSE; |
175 | |
176 | iter = g_sequence_insert_sorted (seq: fms->pending_changes, data: change, cmp_func: pending_change_compare_ready_time, cmp_data: fms); |
177 | g_hash_table_insert (hash_table: fms->pending_changes_table, key: change->child, value: iter); |
178 | } |
179 | |
180 | static gboolean |
181 | g_file_monitor_source_set_pending_change_dirty (GFileMonitorSource *fms, |
182 | GSequenceIter *iter) |
183 | { |
184 | PendingChange *change; |
185 | |
186 | change = g_sequence_get (iter); |
187 | |
188 | /* if it was already dirty then this change is 'uninteresting' */ |
189 | if (change->dirty) |
190 | return FALSE; |
191 | |
192 | change->dirty = TRUE; |
193 | |
194 | g_sequence_sort_changed (iter, cmp_func: pending_change_compare_ready_time, cmp_data: fms); |
195 | |
196 | return TRUE; |
197 | } |
198 | |
199 | static gboolean |
200 | g_file_monitor_source_get_pending_change_dirty (GFileMonitorSource *fms, |
201 | GSequenceIter *iter) |
202 | { |
203 | PendingChange *change; |
204 | |
205 | change = g_sequence_get (iter); |
206 | |
207 | return change->dirty; |
208 | } |
209 | |
210 | static void |
211 | g_file_monitor_source_remove_pending_change (GFileMonitorSource *fms, |
212 | GSequenceIter *iter, |
213 | const gchar *child) |
214 | { |
215 | /* must remove the hash entry first -- its key is owned by the data |
216 | * which will be freed when removing the sequence iter |
217 | */ |
218 | g_hash_table_remove (hash_table: fms->pending_changes_table, key: child); |
219 | g_sequence_remove (iter); |
220 | } |
221 | |
222 | static void |
223 | g_file_monitor_source_queue_event (GFileMonitorSource *fms, |
224 | GFileMonitorEvent event_type, |
225 | const gchar *child, |
226 | GFile *other) |
227 | { |
228 | QueuedEvent *event; |
229 | |
230 | event = g_slice_new (QueuedEvent); |
231 | event->event_type = event_type; |
232 | if (child != NULL && fms->dirname != NULL) |
233 | event->child = g_local_file_new_from_dirname_and_basename (dirname: fms->dirname, basename: child); |
234 | else if (child != NULL) |
235 | { |
236 | gchar *dirname = g_path_get_dirname (file_name: fms->filename); |
237 | event->child = g_local_file_new_from_dirname_and_basename (dirname, basename: child); |
238 | g_free (mem: dirname); |
239 | } |
240 | else if (fms->dirname) |
241 | event->child = _g_local_file_new (filename: fms->dirname); |
242 | else if (fms->filename) |
243 | event->child = _g_local_file_new (filename: fms->filename); |
244 | event->other = other; |
245 | if (other) |
246 | g_object_ref (other); |
247 | |
248 | g_queue_push_tail (queue: &fms->event_queue, data: event); |
249 | } |
250 | |
251 | static gboolean |
252 | g_file_monitor_source_file_changed (GFileMonitorSource *fms, |
253 | const gchar *child, |
254 | gint64 now) |
255 | { |
256 | GSequenceIter *pending; |
257 | gboolean interesting; |
258 | |
259 | pending = g_file_monitor_source_find_pending_change (fms, child); |
260 | |
261 | /* If there is no pending change, emit one and create a record, |
262 | * else: just mark the existing record as dirty. |
263 | */ |
264 | if (!pending) |
265 | { |
266 | g_file_monitor_source_queue_event (fms, event_type: G_FILE_MONITOR_EVENT_CHANGED, child, NULL); |
267 | g_file_monitor_source_add_pending_change (fms, child, now); |
268 | interesting = TRUE; |
269 | } |
270 | else |
271 | interesting = g_file_monitor_source_set_pending_change_dirty (fms, iter: pending); |
272 | |
273 | g_file_monitor_source_update_ready_time (fms); |
274 | |
275 | return interesting; |
276 | } |
277 | |
278 | static void |
279 | g_file_monitor_source_file_changes_done (GFileMonitorSource *fms, |
280 | const gchar *child) |
281 | { |
282 | GSequenceIter *pending; |
283 | |
284 | pending = g_file_monitor_source_find_pending_change (fms, child); |
285 | if (pending) |
286 | { |
287 | /* If it is dirty, make sure we push out the last CHANGED event */ |
288 | if (g_file_monitor_source_get_pending_change_dirty (fms, iter: pending)) |
289 | g_file_monitor_source_queue_event (fms, event_type: G_FILE_MONITOR_EVENT_CHANGED, child, NULL); |
290 | |
291 | g_file_monitor_source_queue_event (fms, event_type: G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT, child, NULL); |
292 | g_file_monitor_source_remove_pending_change (fms, iter: pending, child); |
293 | } |
294 | } |
295 | |
296 | static void |
297 | g_file_monitor_source_file_created (GFileMonitorSource *fms, |
298 | const gchar *child, |
299 | gint64 event_time) |
300 | { |
301 | /* Unlikely, but if we have pending changes for this filename, make |
302 | * sure we flush those out first, before creating the new ones. |
303 | */ |
304 | g_file_monitor_source_file_changes_done (fms, child); |
305 | |
306 | /* Emit CREATE and add a pending changes record */ |
307 | g_file_monitor_source_queue_event (fms, event_type: G_FILE_MONITOR_EVENT_CREATED, child, NULL); |
308 | g_file_monitor_source_add_pending_change (fms, child, now: event_time); |
309 | } |
310 | |
311 | static void |
312 | g_file_monitor_source_send_event (GFileMonitorSource *fms, |
313 | GFileMonitorEvent event_type, |
314 | const gchar *child, |
315 | GFile *other) |
316 | { |
317 | /* always flush any pending changes before we queue a new event */ |
318 | g_file_monitor_source_file_changes_done (fms, child); |
319 | g_file_monitor_source_queue_event (fms, event_type, child, other); |
320 | } |
321 | |
322 | static void |
323 | g_file_monitor_source_send_synthetic_created (GFileMonitorSource *fms, |
324 | const gchar *child) |
325 | { |
326 | g_file_monitor_source_file_changes_done (fms, child); |
327 | g_file_monitor_source_queue_event (fms, event_type: G_FILE_MONITOR_EVENT_CREATED, child, NULL); |
328 | g_file_monitor_source_queue_event (fms, event_type: G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT, child, NULL); |
329 | } |
330 | |
331 | #ifndef G_DISABLE_ASSERT |
332 | static gboolean |
333 | is_basename (const gchar *name) |
334 | { |
335 | if (name[0] == '.' && ((name[1] == '.' && name[2] == '\0') || name[1] == '\0')) |
336 | return FALSE; |
337 | |
338 | return !strchr (s: name, c: '/'); |
339 | } |
340 | #endif /* !G_DISABLE_ASSERT */ |
341 | |
342 | gboolean |
343 | g_file_monitor_source_handle_event (GFileMonitorSource *fms, |
344 | GFileMonitorEvent event_type, |
345 | const gchar *child, |
346 | const gchar *rename_to, |
347 | GFile *other, |
348 | gint64 event_time) |
349 | { |
350 | gboolean interesting = TRUE; |
351 | GFileMonitor *instance = NULL; |
352 | |
353 | g_assert (!child || is_basename (child)); |
354 | g_assert (!rename_to || is_basename (rename_to)); |
355 | |
356 | if (fms->basename && (!child || !g_str_equal (v1: child, v2: fms->basename)) |
357 | && (!rename_to || !g_str_equal (v1: rename_to, v2: fms->basename))) |
358 | return TRUE; |
359 | |
360 | g_mutex_lock (mutex: &fms->lock); |
361 | |
362 | /* monitor is already gone -- don't bother */ |
363 | instance = g_weak_ref_get (weak_ref: &fms->instance_ref); |
364 | if (instance == NULL) |
365 | { |
366 | g_mutex_unlock (mutex: &fms->lock); |
367 | return TRUE; |
368 | } |
369 | |
370 | switch (event_type) |
371 | { |
372 | case G_FILE_MONITOR_EVENT_CREATED: |
373 | g_assert (!other && !rename_to); |
374 | g_file_monitor_source_file_created (fms, child, event_time); |
375 | break; |
376 | |
377 | case G_FILE_MONITOR_EVENT_CHANGED: |
378 | g_assert (!other && !rename_to); |
379 | interesting = g_file_monitor_source_file_changed (fms, child, now: event_time); |
380 | break; |
381 | |
382 | case G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT: |
383 | g_assert (!other && !rename_to); |
384 | g_file_monitor_source_file_changes_done (fms, child); |
385 | break; |
386 | |
387 | case G_FILE_MONITOR_EVENT_MOVED_IN: |
388 | g_assert (!rename_to); |
389 | if (fms->flags & G_FILE_MONITOR_WATCH_MOVES) |
390 | g_file_monitor_source_send_event (fms, event_type: G_FILE_MONITOR_EVENT_MOVED_IN, child, other); |
391 | else |
392 | g_file_monitor_source_send_synthetic_created (fms, child); |
393 | break; |
394 | |
395 | case G_FILE_MONITOR_EVENT_MOVED_OUT: |
396 | g_assert (!rename_to); |
397 | if (fms->flags & G_FILE_MONITOR_WATCH_MOVES) |
398 | g_file_monitor_source_send_event (fms, event_type: G_FILE_MONITOR_EVENT_MOVED_OUT, child, other); |
399 | else if (other && (fms->flags & G_FILE_MONITOR_SEND_MOVED)) |
400 | g_file_monitor_source_send_event (fms, event_type: G_FILE_MONITOR_EVENT_MOVED, child, other); |
401 | else |
402 | g_file_monitor_source_send_event (fms, event_type: G_FILE_MONITOR_EVENT_DELETED, child, NULL); |
403 | break; |
404 | |
405 | case G_FILE_MONITOR_EVENT_RENAMED: |
406 | g_assert (!other && rename_to); |
407 | if (fms->flags & (G_FILE_MONITOR_WATCH_MOVES | G_FILE_MONITOR_SEND_MOVED)) |
408 | { |
409 | GFile *other; |
410 | const gchar *dirname; |
411 | gchar *allocated_dirname = NULL; |
412 | GFileMonitorEvent event; |
413 | |
414 | event = (fms->flags & G_FILE_MONITOR_WATCH_MOVES) ? G_FILE_MONITOR_EVENT_RENAMED : G_FILE_MONITOR_EVENT_MOVED; |
415 | |
416 | if (fms->dirname != NULL) |
417 | dirname = fms->dirname; |
418 | else |
419 | { |
420 | allocated_dirname = g_path_get_dirname (file_name: fms->filename); |
421 | dirname = allocated_dirname; |
422 | } |
423 | |
424 | other = g_local_file_new_from_dirname_and_basename (dirname, basename: rename_to); |
425 | g_file_monitor_source_file_changes_done (fms, child: rename_to); |
426 | g_file_monitor_source_send_event (fms, event_type: event, child, other); |
427 | |
428 | g_object_unref (object: other); |
429 | g_free (mem: allocated_dirname); |
430 | } |
431 | else |
432 | { |
433 | g_file_monitor_source_send_event (fms, event_type: G_FILE_MONITOR_EVENT_DELETED, child, NULL); |
434 | g_file_monitor_source_send_synthetic_created (fms, child: rename_to); |
435 | } |
436 | break; |
437 | |
438 | case G_FILE_MONITOR_EVENT_DELETED: |
439 | case G_FILE_MONITOR_EVENT_ATTRIBUTE_CHANGED: |
440 | case G_FILE_MONITOR_EVENT_PRE_UNMOUNT: |
441 | case G_FILE_MONITOR_EVENT_UNMOUNTED: |
442 | g_assert (!other && !rename_to); |
443 | g_file_monitor_source_send_event (fms, event_type, child, NULL); |
444 | break; |
445 | |
446 | case G_FILE_MONITOR_EVENT_MOVED: |
447 | /* was never available in this API */ |
448 | default: |
449 | g_assert_not_reached (); |
450 | } |
451 | |
452 | g_file_monitor_source_update_ready_time (fms); |
453 | |
454 | g_mutex_unlock (mutex: &fms->lock); |
455 | g_clear_object (&instance); |
456 | |
457 | return interesting; |
458 | } |
459 | |
460 | static gint64 |
461 | g_file_monitor_source_get_rate_limit (GFileMonitorSource *fms) |
462 | { |
463 | gint64 rate_limit; |
464 | |
465 | g_mutex_lock (mutex: &fms->lock); |
466 | rate_limit = fms->rate_limit; |
467 | g_mutex_unlock (mutex: &fms->lock); |
468 | |
469 | return rate_limit; |
470 | } |
471 | |
472 | static gboolean |
473 | g_file_monitor_source_set_rate_limit (GFileMonitorSource *fms, |
474 | gint64 rate_limit) |
475 | { |
476 | gboolean changed; |
477 | |
478 | g_mutex_lock (mutex: &fms->lock); |
479 | |
480 | if (rate_limit != fms->rate_limit) |
481 | { |
482 | fms->rate_limit = rate_limit; |
483 | |
484 | g_sequence_sort (seq: fms->pending_changes, cmp_func: pending_change_compare_ready_time, cmp_data: fms); |
485 | g_file_monitor_source_update_ready_time (fms); |
486 | |
487 | changed = TRUE; |
488 | } |
489 | else |
490 | changed = FALSE; |
491 | |
492 | g_mutex_unlock (mutex: &fms->lock); |
493 | |
494 | return changed; |
495 | } |
496 | |
497 | static gboolean |
498 | g_file_monitor_source_dispatch (GSource *source, |
499 | GSourceFunc callback, |
500 | gpointer user_data) |
501 | { |
502 | GFileMonitorSource *fms = (GFileMonitorSource *) source; |
503 | QueuedEvent *event; |
504 | GQueue event_queue; |
505 | gint64 now; |
506 | GFileMonitor *instance = NULL; |
507 | |
508 | /* make sure the monitor still exists */ |
509 | instance = g_weak_ref_get (weak_ref: &fms->instance_ref); |
510 | if (instance == NULL) |
511 | return FALSE; |
512 | |
513 | now = g_source_get_time (source); |
514 | |
515 | /* Acquire the lock once and grab all events in one go, handling the |
516 | * queued events first. This avoids strange possibilities in cases of |
517 | * long delays, such as CHANGED events coming before CREATED events. |
518 | * |
519 | * We do this by converting the applicable pending changes into queued |
520 | * events (after the ones already queued) and then stealing the entire |
521 | * event queue in one go. |
522 | */ |
523 | g_mutex_lock (mutex: &fms->lock); |
524 | |
525 | /* Create events for any pending changes that are due to fire */ |
526 | while (!g_sequence_is_empty (seq: fms->pending_changes)) |
527 | { |
528 | GSequenceIter *iter = g_sequence_get_begin_iter (seq: fms->pending_changes); |
529 | PendingChange *pending = g_sequence_get (iter); |
530 | |
531 | /* We've gotten to a pending change that's not ready. Stop. */ |
532 | if (pending_change_get_ready_time (change: pending, fms) > now) |
533 | break; |
534 | |
535 | if (pending->dirty) |
536 | { |
537 | /* It's time to send another CHANGED and update the record */ |
538 | g_file_monitor_source_queue_event (fms, event_type: G_FILE_MONITOR_EVENT_CHANGED, child: pending->child, NULL); |
539 | pending->last_emission = now; |
540 | pending->dirty = FALSE; |
541 | |
542 | g_sequence_sort_changed (iter, cmp_func: pending_change_compare_ready_time, cmp_data: fms); |
543 | } |
544 | else |
545 | { |
546 | /* It's time to send CHANGES_DONE and remove the pending record */ |
547 | g_file_monitor_source_queue_event (fms, event_type: G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT, child: pending->child, NULL); |
548 | g_file_monitor_source_remove_pending_change (fms, iter, child: pending->child); |
549 | } |
550 | } |
551 | |
552 | /* Steal the queue */ |
553 | memcpy (dest: &event_queue, src: &fms->event_queue, n: sizeof event_queue); |
554 | memset (s: &fms->event_queue, c: 0, n: sizeof fms->event_queue); |
555 | |
556 | g_file_monitor_source_update_ready_time (fms); |
557 | |
558 | g_mutex_unlock (mutex: &fms->lock); |
559 | g_clear_object (&instance); |
560 | |
561 | /* We now have our list of events to deliver */ |
562 | while ((event = g_queue_pop_head (queue: &event_queue))) |
563 | { |
564 | /* an event handler could destroy 'instance', so check each time */ |
565 | instance = g_weak_ref_get (weak_ref: &fms->instance_ref); |
566 | if (instance != NULL) |
567 | g_file_monitor_emit_event (monitor: instance, child: event->child, other_file: event->other, event_type: event->event_type); |
568 | |
569 | g_clear_object (&instance); |
570 | queued_event_free (event); |
571 | } |
572 | |
573 | return TRUE; |
574 | } |
575 | |
576 | static void |
577 | g_file_monitor_source_dispose (GFileMonitorSource *fms) |
578 | { |
579 | GHashTableIter iter; |
580 | gpointer seqiter; |
581 | QueuedEvent *event; |
582 | |
583 | g_mutex_lock (mutex: &fms->lock); |
584 | |
585 | g_hash_table_iter_init (iter: &iter, hash_table: fms->pending_changes_table); |
586 | while (g_hash_table_iter_next (iter: &iter, NULL, value: &seqiter)) |
587 | { |
588 | g_hash_table_iter_remove (iter: &iter); |
589 | g_sequence_remove (iter: seqiter); |
590 | } |
591 | |
592 | while ((event = g_queue_pop_head (queue: &fms->event_queue))) |
593 | queued_event_free (event); |
594 | |
595 | g_assert (g_sequence_is_empty (fms->pending_changes)); |
596 | g_assert (g_hash_table_size (fms->pending_changes_table) == 0); |
597 | g_assert (fms->event_queue.length == 0); |
598 | g_weak_ref_set (weak_ref: &fms->instance_ref, NULL); |
599 | |
600 | g_file_monitor_source_update_ready_time (fms); |
601 | |
602 | g_mutex_unlock (mutex: &fms->lock); |
603 | |
604 | g_source_destroy (source: (GSource *) fms); |
605 | } |
606 | |
607 | static void |
608 | g_file_monitor_source_finalize (GSource *source) |
609 | { |
610 | GFileMonitorSource *fms = (GFileMonitorSource *) source; |
611 | |
612 | /* should already have been cleared in dispose of the monitor */ |
613 | g_assert (g_weak_ref_get (&fms->instance_ref) == NULL); |
614 | g_weak_ref_clear (weak_ref: &fms->instance_ref); |
615 | |
616 | g_assert (g_sequence_is_empty (fms->pending_changes)); |
617 | g_assert (g_hash_table_size (fms->pending_changes_table) == 0); |
618 | g_assert (fms->event_queue.length == 0); |
619 | |
620 | g_hash_table_unref (hash_table: fms->pending_changes_table); |
621 | g_sequence_free (seq: fms->pending_changes); |
622 | |
623 | g_free (mem: fms->dirname); |
624 | g_free (mem: fms->basename); |
625 | g_free (mem: fms->filename); |
626 | |
627 | g_mutex_clear (mutex: &fms->lock); |
628 | } |
629 | |
630 | static guint |
631 | str_hash0 (gconstpointer str) |
632 | { |
633 | return str ? g_str_hash (v: str) : 0; |
634 | } |
635 | |
636 | static gboolean |
637 | str_equal0 (gconstpointer a, |
638 | gconstpointer b) |
639 | { |
640 | return g_strcmp0 (str1: a, str2: b) == 0; |
641 | } |
642 | |
643 | static GFileMonitorSource * |
644 | g_file_monitor_source_new (gpointer instance, |
645 | const gchar *filename, |
646 | gboolean is_directory, |
647 | GFileMonitorFlags flags) |
648 | { |
649 | static GSourceFuncs source_funcs = { |
650 | NULL, NULL, |
651 | g_file_monitor_source_dispatch, |
652 | g_file_monitor_source_finalize, |
653 | NULL, NULL |
654 | }; |
655 | GFileMonitorSource *fms; |
656 | GSource *source; |
657 | |
658 | source = g_source_new (source_funcs: &source_funcs, struct_size: sizeof (GFileMonitorSource)); |
659 | fms = (GFileMonitorSource *) source; |
660 | |
661 | g_source_set_name (source, name: "GFileMonitorSource" ); |
662 | |
663 | g_mutex_init (mutex: &fms->lock); |
664 | g_weak_ref_init (weak_ref: &fms->instance_ref, object: instance); |
665 | fms->pending_changes = g_sequence_new (data_destroy: pending_change_free); |
666 | fms->pending_changes_table = g_hash_table_new (hash_func: str_hash0, key_equal_func: str_equal0); |
667 | fms->rate_limit = DEFAULT_RATE_LIMIT; |
668 | fms->flags = flags; |
669 | |
670 | if (is_directory) |
671 | { |
672 | fms->dirname = g_strdup (str: filename); |
673 | fms->basename = NULL; |
674 | fms->filename = NULL; |
675 | } |
676 | else if (flags & G_FILE_MONITOR_WATCH_HARD_LINKS) |
677 | { |
678 | fms->dirname = NULL; |
679 | fms->basename = NULL; |
680 | fms->filename = g_strdup (str: filename); |
681 | } |
682 | else |
683 | { |
684 | fms->dirname = g_path_get_dirname (file_name: filename); |
685 | fms->basename = g_path_get_basename (file_name: filename); |
686 | fms->filename = NULL; |
687 | } |
688 | |
689 | return fms; |
690 | } |
691 | |
692 | G_DEFINE_ABSTRACT_TYPE (GLocalFileMonitor, g_local_file_monitor, G_TYPE_FILE_MONITOR) |
693 | |
694 | enum { |
695 | PROP_0, |
696 | PROP_RATE_LIMIT, |
697 | }; |
698 | |
699 | static void |
700 | g_local_file_monitor_get_property (GObject *object, guint prop_id, |
701 | GValue *value, GParamSpec *pspec) |
702 | { |
703 | GLocalFileMonitor *monitor = G_LOCAL_FILE_MONITOR (object); |
704 | gint64 rate_limit; |
705 | |
706 | g_assert (prop_id == PROP_RATE_LIMIT); |
707 | |
708 | rate_limit = g_file_monitor_source_get_rate_limit (fms: monitor->source); |
709 | rate_limit /= G_TIME_SPAN_MILLISECOND; |
710 | |
711 | g_value_set_int (value, v_int: rate_limit); |
712 | } |
713 | |
714 | static void |
715 | g_local_file_monitor_set_property (GObject *object, guint prop_id, |
716 | const GValue *value, GParamSpec *pspec) |
717 | { |
718 | GLocalFileMonitor *monitor = G_LOCAL_FILE_MONITOR (object); |
719 | gint64 rate_limit; |
720 | |
721 | g_assert (prop_id == PROP_RATE_LIMIT); |
722 | |
723 | rate_limit = g_value_get_int (value); |
724 | rate_limit *= G_TIME_SPAN_MILLISECOND; |
725 | |
726 | if (g_file_monitor_source_set_rate_limit (fms: monitor->source, rate_limit)) |
727 | g_object_notify (object, property_name: "rate-limit" ); |
728 | } |
729 | |
730 | #ifndef G_OS_WIN32 |
731 | static void |
732 | g_local_file_monitor_mounts_changed (GUnixMountMonitor *mount_monitor, |
733 | gpointer user_data) |
734 | { |
735 | GLocalFileMonitor *local_monitor = user_data; |
736 | GUnixMountEntry *mount; |
737 | gboolean is_mounted; |
738 | GFile *file; |
739 | |
740 | /* Emulate unmount detection */ |
741 | mount = g_unix_mount_at (mount_path: local_monitor->source->dirname, NULL); |
742 | |
743 | is_mounted = mount != NULL; |
744 | |
745 | if (mount) |
746 | g_unix_mount_free (mount_entry: mount); |
747 | |
748 | if (local_monitor->was_mounted != is_mounted) |
749 | { |
750 | if (local_monitor->was_mounted && !is_mounted) |
751 | { |
752 | file = g_file_new_for_path (path: local_monitor->source->dirname); |
753 | g_file_monitor_emit_event (G_FILE_MONITOR (local_monitor), child: file, NULL, event_type: G_FILE_MONITOR_EVENT_UNMOUNTED); |
754 | g_object_unref (object: file); |
755 | } |
756 | local_monitor->was_mounted = is_mounted; |
757 | } |
758 | } |
759 | #endif |
760 | |
761 | static void |
762 | g_local_file_monitor_start (GLocalFileMonitor *local_monitor, |
763 | const gchar *filename, |
764 | gboolean is_directory, |
765 | GFileMonitorFlags flags, |
766 | GMainContext *context) |
767 | { |
768 | GLocalFileMonitorClass *class = G_LOCAL_FILE_MONITOR_GET_CLASS (local_monitor); |
769 | GFileMonitorSource *source; |
770 | |
771 | g_return_if_fail (G_IS_LOCAL_FILE_MONITOR (local_monitor)); |
772 | |
773 | g_assert (!local_monitor->source); |
774 | |
775 | source = g_file_monitor_source_new (instance: local_monitor, filename, is_directory, flags); |
776 | local_monitor->source = source; /* owns the ref */ |
777 | |
778 | if (is_directory && !class->mount_notify && (flags & G_FILE_MONITOR_WATCH_MOUNTS)) |
779 | { |
780 | #ifdef G_OS_WIN32 |
781 | /*claim everything was mounted */ |
782 | local_monitor->was_mounted = TRUE; |
783 | #else |
784 | GUnixMountEntry *mount; |
785 | |
786 | /* Emulate unmount detection */ |
787 | |
788 | mount = g_unix_mount_at (mount_path: local_monitor->source->dirname, NULL); |
789 | |
790 | local_monitor->was_mounted = mount != NULL; |
791 | |
792 | if (mount) |
793 | g_unix_mount_free (mount_entry: mount); |
794 | |
795 | local_monitor->mount_monitor = g_unix_mount_monitor_get (); |
796 | g_signal_connect_object (instance: local_monitor->mount_monitor, detailed_signal: "mounts-changed" , |
797 | G_CALLBACK (g_local_file_monitor_mounts_changed), gobject: local_monitor, connect_flags: 0); |
798 | #endif |
799 | } |
800 | |
801 | g_source_attach (source: (GSource *) source, context); |
802 | |
803 | G_LOCAL_FILE_MONITOR_GET_CLASS (local_monitor)->start (local_monitor, |
804 | source->dirname, source->basename, source->filename, |
805 | source); |
806 | } |
807 | |
808 | static void |
809 | g_local_file_monitor_dispose (GObject *object) |
810 | { |
811 | GLocalFileMonitor *local_monitor = G_LOCAL_FILE_MONITOR (object); |
812 | |
813 | g_file_monitor_source_dispose (fms: local_monitor->source); |
814 | |
815 | G_OBJECT_CLASS (g_local_file_monitor_parent_class)->dispose (object); |
816 | } |
817 | |
818 | static void |
819 | g_local_file_monitor_finalize (GObject *object) |
820 | { |
821 | GLocalFileMonitor *local_monitor = G_LOCAL_FILE_MONITOR (object); |
822 | |
823 | g_source_unref (source: (GSource *) local_monitor->source); |
824 | |
825 | G_OBJECT_CLASS (g_local_file_monitor_parent_class)->finalize (object); |
826 | } |
827 | |
828 | static void |
829 | g_local_file_monitor_init (GLocalFileMonitor* local_monitor) |
830 | { |
831 | } |
832 | |
833 | static void g_local_file_monitor_class_init (GLocalFileMonitorClass *class) |
834 | { |
835 | GObjectClass *gobject_class = G_OBJECT_CLASS (class); |
836 | |
837 | gobject_class->get_property = g_local_file_monitor_get_property; |
838 | gobject_class->set_property = g_local_file_monitor_set_property; |
839 | gobject_class->dispose = g_local_file_monitor_dispose; |
840 | gobject_class->finalize = g_local_file_monitor_finalize; |
841 | |
842 | g_object_class_override_property (oclass: gobject_class, property_id: PROP_RATE_LIMIT, name: "rate-limit" ); |
843 | } |
844 | |
845 | static GLocalFileMonitor * |
846 | g_local_file_monitor_new (gboolean is_remote_fs, |
847 | gboolean is_directory, |
848 | GError **error) |
849 | { |
850 | GType type = G_TYPE_INVALID; |
851 | |
852 | if (is_remote_fs) |
853 | type = _g_io_module_get_default_type (G_NFS_FILE_MONITOR_EXTENSION_POINT_NAME, |
854 | envvar: "GIO_USE_FILE_MONITOR" , |
855 | G_STRUCT_OFFSET (GLocalFileMonitorClass, is_supported)); |
856 | |
857 | /* Fallback rather to poll file monitor for remote files, see gfile.c. */ |
858 | if (type == G_TYPE_INVALID && (!is_remote_fs || is_directory)) |
859 | type = _g_io_module_get_default_type (G_LOCAL_FILE_MONITOR_EXTENSION_POINT_NAME, |
860 | envvar: "GIO_USE_FILE_MONITOR" , |
861 | G_STRUCT_OFFSET (GLocalFileMonitorClass, is_supported)); |
862 | |
863 | if (type == G_TYPE_INVALID) |
864 | { |
865 | g_set_error_literal (err: error, G_IO_ERROR, code: G_IO_ERROR_FAILED, |
866 | _("Unable to find default local file monitor type" )); |
867 | return NULL; |
868 | } |
869 | |
870 | return g_object_new (object_type: type, NULL); |
871 | } |
872 | |
873 | GFileMonitor * |
874 | g_local_file_monitor_new_for_path (const gchar *pathname, |
875 | gboolean is_directory, |
876 | GFileMonitorFlags flags, |
877 | GError **error) |
878 | { |
879 | GLocalFileMonitor *monitor; |
880 | gboolean is_remote_fs; |
881 | |
882 | is_remote_fs = g_local_file_is_nfs_home (filename: pathname); |
883 | |
884 | monitor = g_local_file_monitor_new (is_remote_fs, is_directory, error); |
885 | |
886 | if (monitor) |
887 | g_local_file_monitor_start (local_monitor: monitor, filename: pathname, is_directory, flags, context: g_main_context_get_thread_default ()); |
888 | |
889 | return G_FILE_MONITOR (monitor); |
890 | } |
891 | |
892 | GFileMonitor * |
893 | g_local_file_monitor_new_in_worker (const gchar *pathname, |
894 | gboolean is_directory, |
895 | GFileMonitorFlags flags, |
896 | GFileMonitorCallback callback, |
897 | gpointer user_data, |
898 | GClosureNotify destroy_user_data, |
899 | GError **error) |
900 | { |
901 | GLocalFileMonitor *monitor; |
902 | gboolean is_remote_fs; |
903 | |
904 | is_remote_fs = g_local_file_is_nfs_home (filename: pathname); |
905 | |
906 | monitor = g_local_file_monitor_new (is_remote_fs, is_directory, error); |
907 | |
908 | if (monitor) |
909 | { |
910 | if (callback) |
911 | g_signal_connect_data (instance: monitor, detailed_signal: "changed" , G_CALLBACK (callback), |
912 | data: user_data, destroy_data: destroy_user_data, connect_flags: 0 /* flags */); |
913 | |
914 | g_local_file_monitor_start (local_monitor: monitor, filename: pathname, is_directory, flags, GLIB_PRIVATE_CALL(g_get_worker_context) ()); |
915 | } |
916 | |
917 | return G_FILE_MONITOR (monitor); |
918 | } |
919 | |