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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim:set expandtab ts=4 shiftwidth=4: */
/*
* Copyright (c) 2008, 2010 Oracle and/or its affiliates, Inc. All rights
* reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* Authors: Lin Ma <lin.ma@sun.com>
*/
#include "config.h"
#include <glib.h>
#include "fen-helper.h"
#include "fen-kernel.h"
#ifdef GIO_COMPILATION
#include <gio/gfilemonitor.h>
#else
#include "gam_event.h"
#include "gam_server.h"
#include "gam_protocol.h"
#endif
#ifdef GIO_COMPILATION
#define FH_W if (FALSE) g_debug
#else
#include "gam_error.h"
#define FH_W(...) GAM_DEBUG(DEBUG_INFO, __VA_ARGS__)
#endif
G_LOCK_EXTERN (fen_lock);
/* misc */
static void
scan_children_init(node_t *f, gpointer sub)
{
gboolean emit;
gint event;
FH_W ("%s %s [0x%p]\n", __func__, NODE_NAME(f), f);
#ifdef GIO_COMPILATION
emit = FALSE;
event = G_FILE_MONITOR_EVENT_CREATED;
#else
emit = TRUE;
event = GAMIN_EVENT_EXISTS;
#endif
if (!NODE_HAS_FLAG(f, NODE_FLAG_SNAPSHOT_UPDATED)) {
/* TODO snapshot should also compare to the sub created timestamp. */
/* GIO initially doesn't emit created/existed events. */
node_create_children_snapshot(f, event, emit);
} else {
GHashTableIter iter;
gpointer value;
g_hash_table_iter_init (&iter, f->children);
while (g_hash_table_iter_next (&iter, NULL, &value)) {
node_t *child = (node_t *)value;
#ifdef GIO_COMPILATION
/* GIO initially doesn't emit created/existed events. */
/* g_file_monitor_emit_event(G_FILE_MONITOR(sub), child->gfile, NULL, event); */
#else
gam_server_emit_one_event(NODE_NAME(child), gam_subscription_is_dir(sub), event, sub, 1);
#endif
}
}
}
/**
* fen_add
*
* Won't hold a ref, we have a timout callback to clean unused node_t.
* If there is no value for a key, add it and return it; else return the old
* one.
*/
void
fen_add (const gchar *filename, gpointer sub, gboolean is_mondir)
{
node_t* f;
g_assert (filename);
g_assert (sub);
G_LOCK (fen_lock);
f = node_find(NULL, filename, TRUE);
FH_W ("%s 0x%p sub[0x%p] %s\n", __func__, f, sub, filename);
g_assert (f);
/* Update timestamp, the events in global queue will compare itself to this
* timestamp to decide if be emitted. TODO, timestamp should be per sub.
*/
if (!NODE_IS_ACTIVE(f)) {
g_get_current_time(&f->atv);
}
if (is_mondir) {
f->dir_subs = g_list_prepend(f->dir_subs, sub);
} else {
f->subs = g_list_prepend(f->subs, sub);
}
if (NODE_HAS_STATE(f, NODE_STATE_ASSOCIATED) ||
(node_lstat(f) == 0 && port_add(f) == 0)) {
#ifndef GIO_COMPILATION
gam_server_emit_one_event (NODE_NAME(f),
gam_subscription_is_dir (sub), GAMIN_EVENT_EXISTS, sub, 1);
#endif
if (is_mondir) {
scan_children_init (f, sub);
}
} else {
#ifndef GIO_COMPILATION
gam_server_emit_one_event (NODE_NAME(f),
gam_subscription_is_dir (sub), GAMIN_EVENT_DELETED, sub, 1);
#endif
node_adjust_deleted (f);
}
#ifndef GIO_COMPILATION
gam_server_emit_one_event (NODE_NAME(f),
gam_subscription_is_dir (sub), GAMIN_EVENT_ENDEXISTS, sub, 1);
#endif
G_UNLOCK (fen_lock);
}
void
fen_remove (const gchar *filename, gpointer sub, gboolean is_mondir)
{
node_t* f;
g_assert (filename);
g_assert (sub);
G_LOCK (fen_lock);
f = node_find(NULL, filename, FALSE);
FH_W ("%s 0x%p sub[0x%p] %s\n", __func__, f, sub, filename);
if (f) {
if (is_mondir) {
f->dir_subs = g_list_remove(f->dir_subs, sub);
} else {
f->subs = g_list_remove(f->subs, sub);
}
if (!NODE_IS_ACTIVE(f)) {
node_try_delete (f);
}
}
G_UNLOCK (fen_lock);
}
/**
* fen_init:
*
* FEN subsystem initializing.
*/
gboolean
fen_init ()
{
static gboolean initialized = FALSE;
static gboolean result = FALSE;
G_LOCK (fen_lock);
if (initialized) {
G_UNLOCK (fen_lock);
return result;
}
result = node_class_init();
if (!result) {
G_UNLOCK (fen_lock);
return result;
}
initialized = TRUE;
G_UNLOCK (fen_lock);
return result;
}
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