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/*-
* Copyright (c) 2016 - 2019 Rozhuk Ivan <rozhuk.im@gmail.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Author: Rozhuk Ivan <rozhuk.im@gmail.com>
*
*/
#include "config.h"
#include <glib-object.h>
#include <string.h>
#include <gio/gfilemonitor.h>
#include <gio/glocalfilemonitor.h>
#include <gio/giomodule.h>
#include "glib-private.h"
#include <glib-unix.h>
#include "kqueue_fnm.h"
#ifdef __clang__
#pragma clang diagnostic pop
#endif
/* Defaults. */
#ifndef KQUEUE_MON_RATE_LIMIT_TIME_INIT
# define KQUEUE_MON_RATE_LIMIT_TIME_INIT 1000
#endif
#ifndef KQUEUE_MON_RATE_LIMIT_TIME_MAX
# define KQUEUE_MON_RATE_LIMIT_TIME_MAX 4000
#endif
#ifndef KQUEUE_MON_RATE_LIMIT_TIME_MUL
# define KQUEUE_MON_RATE_LIMIT_TIME_MUL 2
#endif
#ifndef KQUEUE_MON_MAX_DIR_FILES
# define KQUEUE_MON_MAX_DIR_FILES 128
#endif
#ifndef KQUEUE_MON_LOCAL_SUBFILES
# define KQUEUE_MON_LOCAL_SUBFILES 1
#endif
#ifndef KQUEUE_MON_LOCAL_SUBDIRS
# define KQUEUE_MON_LOCAL_SUBDIRS 0
#endif
static GMutex kqueue_lock;
static volatile kq_fnm_p kqueue_fnm = NULL;
/* Exclude from file changes monitoring, watch only for dirs. */
static const char *non_local_fs[] = {
"fusefs.sshfs",
NULL
};
#define G_TYPE_KQUEUE_FILE_MONITOR (g_kqueue_file_monitor_get_type())
#define G_KQUEUE_FILE_MONITOR(inst) (G_TYPE_CHECK_INSTANCE_CAST((inst), \
G_TYPE_KQUEUE_FILE_MONITOR, GKqueueFileMonitor))
typedef GLocalFileMonitorClass GKqueueFileMonitorClass;
typedef struct {
GLocalFileMonitor parent_instance;
kq_fnme_p fnme;
} GKqueueFileMonitor;
GType g_kqueue_file_monitor_get_type(void);
G_DEFINE_TYPE_WITH_CODE (GKqueueFileMonitor, g_kqueue_file_monitor, G_TYPE_LOCAL_FILE_MONITOR,
g_io_extension_point_implement(G_LOCAL_FILE_MONITOR_EXTENSION_POINT_NAME,
g_define_type_id,
"kqueue",
10))
static void
kqueue_event_handler(kq_fnm_p kfnm,
kq_fnme_p fnme, void *udata, uint32_t event,
const char *base, const char *filename, const char *new_filename) {
static const uint32_t kfnm_to_glib_map[] = {
0, /* KF_EVENT_NOT_CHANGED */
G_FILE_MONITOR_EVENT_CREATED, /* KF_EVENT_CREATED */
G_FILE_MONITOR_EVENT_DELETED, /* KF_EVENT_DELETED */
G_FILE_MONITOR_EVENT_RENAMED, /* KF_EVENT_RENAMED */
G_FILE_MONITOR_EVENT_CHANGED /* KF_EVENT_CHANGED */
};
if (NULL == kfnm || NULL == filename || 0 == filename[0] ||
strchr(filename, '/') ||
KF_EVENT_CREATED > event ||
KF_EVENT_CHANGED < event)
return;
g_file_monitor_source_handle_event(udata,
kfnm_to_glib_map[event],
filename, new_filename, NULL,
g_get_monotonic_time());
}
static gboolean
g_kqueue_file_monitor_is_supported(void) {
kq_file_mon_settings_t kfms;
if (NULL != kqueue_fnm)
return (TRUE);
/* Init only once. */
g_mutex_lock(&kqueue_lock);
if (NULL != kqueue_fnm) {
g_mutex_unlock(&kqueue_lock);
return (TRUE); /* Initialized while wait lock. */
}
memset(&kfms, 0x00, sizeof(kq_file_mon_settings_t));
kfms.rate_limit_time_init = KQUEUE_MON_RATE_LIMIT_TIME_INIT;
kfms.rate_limit_time_max = KQUEUE_MON_RATE_LIMIT_TIME_MAX;
kfms.rate_limit_time_mul = KQUEUE_MON_RATE_LIMIT_TIME_MUL;
kfms.max_dir_files = KQUEUE_MON_MAX_DIR_FILES;
kfms.mon_local_subfiles = KQUEUE_MON_LOCAL_SUBFILES;
kfms.mon_local_subdirs = KQUEUE_MON_LOCAL_SUBDIRS;
kfms.local_fs = NULL;
kfms.non_local_fs = non_local_fs;
kqueue_fnm = kq_fnm_create(&kfms, kqueue_event_handler);
if (NULL == kqueue_fnm) {
g_mutex_unlock(&kqueue_lock);
return (FALSE); /* Init fail. */
}
g_mutex_unlock(&kqueue_lock);
return (TRUE);
}
static gboolean
g_kqueue_file_monitor_cancel(GFileMonitor *monitor) {
GKqueueFileMonitor *gffm = G_KQUEUE_FILE_MONITOR(monitor);
kq_fnm_del(kqueue_fnm, gffm->fnme);
gffm->fnme = NULL;
return (TRUE);
}
static void
g_kqueue_file_monitor_finalize(GObject *object) {
//GKqueueFileMonitor *gffm = G_KQUEUE_FILE_MONITOR(object);
//g_mutex_lock(&kqueue_lock);
//kq_fnm_free(kqueue_fnm);
//kqueue_fnm = NULL;
//g_mutex_unlock(&kqueue_lock);
//G_OBJECT_CLASS(g_kqueue_file_monitor_parent_class)->finalize(object);
}
static void
g_kqueue_file_monitor_start(GLocalFileMonitor *local_monitor,
const gchar *dirname, const gchar *basename,
const gchar *filename, GFileMonitorSource *source) {
GKqueueFileMonitor *gffm = G_KQUEUE_FILE_MONITOR(local_monitor);
g_assert(NULL != kqueue_fnm);
//g_source_ref((GSource*)source);
if (NULL == filename) {
filename = dirname;
}
gffm->fnme = kq_fnm_add(kqueue_fnm, filename, source);
}
static void
g_kqueue_file_monitor_init(GKqueueFileMonitor *monitor) {
}
static void
g_kqueue_file_monitor_class_init(GKqueueFileMonitorClass *class) {
GObjectClass *gobject_class = G_OBJECT_CLASS(class);
GFileMonitorClass *file_monitor_class = G_FILE_MONITOR_CLASS(class);
class->is_supported = g_kqueue_file_monitor_is_supported;
class->start = g_kqueue_file_monitor_start;
class->mount_notify = TRUE; /* TODO: ??? */
file_monitor_class->cancel = g_kqueue_file_monitor_cancel;
gobject_class->finalize = g_kqueue_file_monitor_finalize;
}
static void
g_kqueue_file_monitor_class_finalize(GKqueueFileMonitorClass *class) {
}
void
g_io_module_load(GIOModule *module) {
g_type_module_use(G_TYPE_MODULE(module));
g_io_extension_point_implement(G_LOCAL_FILE_MONITOR_EXTENSION_POINT_NAME,
G_TYPE_KQUEUE_FILE_MONITOR, "kqueue", 10);
g_io_extension_point_implement(G_NFS_FILE_MONITOR_EXTENSION_POINT_NAME,
G_TYPE_KQUEUE_FILE_MONITOR, "kqueue", 10);
}
void
g_io_module_unload(GIOModule *module) {
g_assert_not_reached();
}
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