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#include "dbus.h"
#include <dbus/dbus.h>
#include <wayland-server-core.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#if defined __linux__
#include <sys/eventfd.h>
#elif defined(__FreeBSD__) || defined(__OpenBSD__)
#include <sys/event.h>
#endif
#include <unistd.h>
int efd = -1;
static int
dwl_dbus_dispatch(int fd, unsigned int mask, void *data)
{
DBusConnection *conn = data;
uint64_t dispatch_pending;
DBusDispatchStatus status;
status = dbus_connection_dispatch(conn);
/*
* Don't clear pending flag if message queue wasn't
* fully drained
*/
if (status != DBUS_DISPATCH_COMPLETE)
return 0;
if (read(fd, &dispatch_pending, sizeof(uint64_t)) < 0)
perror("read");
return 0;
}
static int
dwl_dbus_watch_handle(int fd, uint32_t mask, void *data)
{
DBusWatch *watch = data;
uint32_t flags = 0;
if (!dbus_watch_get_enabled(watch))
return 0;
if (mask & WL_EVENT_READABLE)
flags |= DBUS_WATCH_READABLE;
if (mask & WL_EVENT_WRITABLE)
flags |= DBUS_WATCH_WRITABLE;
if (mask & WL_EVENT_HANGUP)
flags |= DBUS_WATCH_HANGUP;
if (mask & WL_EVENT_ERROR)
flags |= DBUS_WATCH_ERROR;
dbus_watch_handle(watch, flags);
return 0;
}
static dbus_bool_t
dwl_dbus_add_watch(DBusWatch *watch, void *data)
{
struct wl_event_loop *loop = data;
int fd;
struct wl_event_source *watch_source;
uint32_t mask = 0, flags;
if (!dbus_watch_get_enabled(watch))
return TRUE;
flags = dbus_watch_get_flags(watch);
if (flags & DBUS_WATCH_READABLE)
mask |= WL_EVENT_READABLE;
if (flags & DBUS_WATCH_WRITABLE)
mask |= WL_EVENT_WRITABLE;
fd = dbus_watch_get_unix_fd(watch);
watch_source = wl_event_loop_add_fd(loop, fd, mask,
dwl_dbus_watch_handle, watch);
dbus_watch_set_data(watch, watch_source, NULL);
return TRUE;
}
static void
dwl_dbus_remove_watch(DBusWatch *watch, void *data)
{
struct wl_event_source *watch_source = dbus_watch_get_data(watch);
if (watch_source)
wl_event_source_remove(watch_source);
}
static int
dwl_dbus_timeout_handle(void *data)
{
DBusTimeout *timeout = data;
if (dbus_timeout_get_enabled(timeout))
dbus_timeout_handle(timeout);
return 0;
}
static dbus_bool_t
dwl_dbus_add_timeout(DBusTimeout *timeout, void *data)
{
struct wl_event_loop *loop = data;
int r, interval;
struct wl_event_source *timeout_source;
if (!dbus_timeout_get_enabled(timeout))
return TRUE;
interval = dbus_timeout_get_interval(timeout);
timeout_source = wl_event_loop_add_timer(
loop, dwl_dbus_timeout_handle, timeout);
r = wl_event_source_timer_update(timeout_source, interval);
if (r < 0) {
wl_event_source_remove(timeout_source);
return FALSE;
}
dbus_timeout_set_data(timeout, timeout_source, NULL);
return TRUE;
}
static void
dwl_dbus_remove_timeout(DBusTimeout *timeout, void *data)
{
struct wl_event_source *timeout_source;
timeout_source = dbus_timeout_get_data(timeout);
if (timeout_source) {
wl_event_source_timer_update(timeout_source, 0);
wl_event_source_remove(timeout_source);
}
}
static void
dwl_dbus_adjust_timeout(DBusTimeout *timeout, void *data)
{
int interval;
struct wl_event_source *timeout_source;
timeout_source = dbus_timeout_get_data(timeout);
if (timeout_source) {
interval = dbus_timeout_get_interval(timeout);
wl_event_source_timer_update(timeout_source, interval);
}
}
static void
dwl_dbus_dispatch_status(DBusConnection *conn, DBusDispatchStatus status, void *data)
{
if (status == DBUS_DISPATCH_DATA_REMAINS) {
uint64_t dispatch_pending = 1;
if (write(efd, &dispatch_pending, sizeof(uint64_t)) < 0)
perror("write");
}
}
struct wl_event_source *
startbus(DBusConnection *conn, struct wl_event_loop *loop)
{
struct wl_event_source *bus_source = NULL;
uint64_t dispatch_pending = 1;
dbus_connection_set_exit_on_disconnect(conn, FALSE);
#if defined __linux__
efd = eventfd(0, EFD_CLOEXEC);
#elif defined(__FreeBSD__) || defined(__OpenBSD__)
efd = kqueue();
#endif
if (efd < 0)
goto fail;
dbus_connection_set_dispatch_status_function(conn, dwl_dbus_dispatch_status, NULL, NULL);
if (!dbus_connection_set_watch_functions(conn, dwl_dbus_add_watch,
dwl_dbus_remove_watch,
NULL, loop, NULL)) {
goto fail;
}
if (!dbus_connection_set_timeout_functions(
conn, dwl_dbus_add_timeout, dwl_dbus_remove_timeout,
dwl_dbus_adjust_timeout, loop, NULL)) {
goto fail;
}
bus_source = wl_event_loop_add_fd(loop, efd, WL_EVENT_READABLE, dwl_dbus_dispatch, conn);
if (!bus_source)
goto fail;
if (dbus_connection_get_dispatch_status(conn) == DBUS_DISPATCH_DATA_REMAINS)
if (write(efd, &dispatch_pending, sizeof(uint64_t)) < 0)
perror("write");
return bus_source;
fail:
if (bus_source)
wl_event_source_remove(bus_source);
if (efd >= 0) {
close(efd);
efd = -1;
}
dbus_connection_set_timeout_functions(conn, NULL, NULL, NULL, NULL, NULL);
dbus_connection_set_watch_functions(conn, NULL, NULL, NULL, NULL, NULL);
dbus_connection_set_dispatch_status_function(conn, NULL, NULL, NULL);
return NULL;
}
void
stopbus(DBusConnection *conn, struct wl_event_source *bus_source)
{
wl_event_source_remove(bus_source);
close(efd);
efd = -1;
dbus_connection_set_watch_functions(conn, NULL, NULL, NULL, NULL, NULL);
dbus_connection_set_timeout_functions(conn, NULL, NULL, NULL, NULL, NULL);
dbus_connection_set_dispatch_status_function(conn, NULL, NULL, NULL);
}
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