updae source to 2.0.9 source

Edward Rudd

2019-04-09 9cd2e9ec8fc0127393dfce9c0359d500c8c238be

 source/src/core/linux/SDL_dbus.c

@@ -1,6 +1,6 @@
/*
  Simple DirectMedia Layer
  Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>

  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the authors be held liable for any damages
@@ -27,10 +27,10 @@
static const char *dbus_library = "libdbus-1.so.3";
static void *dbus_handle = NULL;
static unsigned int screensaver_cookie = 0;
static SDL_DBusContext dbus = {0};
static SDL_DBusContext dbus;

static int
load_dbus_syms(void)
LoadDBUSSyms(void)
{
    #define SDL_DBUS_SYM2(x, y) \
        if (!(dbus.x = SDL_LoadFunction(dbus_handle, #y))) return -1
@@ -45,6 +45,7 @@
    SDL_DBUS_SYM(connection_set_exit_on_disconnect);
    SDL_DBUS_SYM(connection_get_is_connected);
    SDL_DBUS_SYM(connection_add_filter);
    SDL_DBUS_SYM(connection_try_register_object_path);
    SDL_DBUS_SYM(connection_send);
    SDL_DBUS_SYM(connection_send_with_reply_and_block);
    SDL_DBUS_SYM(connection_close);
@@ -55,7 +56,9 @@
    SDL_DBUS_SYM(message_is_signal);
    SDL_DBUS_SYM(message_new_method_call);
    SDL_DBUS_SYM(message_append_args);
    SDL_DBUS_SYM(message_append_args_valist);
    SDL_DBUS_SYM(message_get_args);
    SDL_DBUS_SYM(message_get_args_valist);
    SDL_DBUS_SYM(message_iter_init);
    SDL_DBUS_SYM(message_iter_next);
    SDL_DBUS_SYM(message_iter_get_basic);
@@ -67,6 +70,7 @@
    SDL_DBUS_SYM(error_free);
    SDL_DBUS_SYM(get_local_machine_id);
    SDL_DBUS_SYM(free);
    SDL_DBUS_SYM(free_string_array);
    SDL_DBUS_SYM(shutdown);

    #undef SDL_DBUS_SYM
@@ -94,7 +98,7 @@
            retval = -1;
            /* Don't call SDL_SetError(): SDL_LoadObject already did. */
        } else {
            retval = load_dbus_syms();
            retval = LoadDBUSSyms();
            if (retval < 0) {
                UnloadDBUSLibrary();
            }
@@ -111,14 +115,15 @@
        DBusError err;
        dbus.error_init(&err);
        dbus.session_conn = dbus.bus_get_private(DBUS_BUS_SESSION, &err);
        if (!dbus.error_is_set(&err)) {
            dbus.system_conn = dbus.bus_get_private(DBUS_BUS_SYSTEM, &err);
        }
        if (dbus.error_is_set(&err)) {
            dbus.error_free(&err);
            if (dbus.session_conn) {
                dbus.connection_unref(dbus.session_conn);
                dbus.session_conn = NULL;
            }
            SDL_DBus_Quit();
            return;  /* oh well */
        }
        dbus.connection_set_exit_on_disconnect(dbus.system_conn, 0);
        dbus.connection_set_exit_on_disconnect(dbus.session_conn, 0);
    }
}
@@ -126,12 +131,23 @@
void
SDL_DBus_Quit(void)
{
    if (dbus.system_conn) {
        dbus.connection_close(dbus.system_conn);
        dbus.connection_unref(dbus.system_conn);
    }
    if (dbus.session_conn) {
        dbus.connection_close(dbus.session_conn);
        dbus.connection_unref(dbus.session_conn);
        dbus.shutdown();
        SDL_memset(&dbus, 0, sizeof(dbus));
    }
/* Don't do this - bug 3950
   dbus_shutdown() is a debug feature which closes all global resources in the dbus library. Calling this should be done by the app, not a library, because if there are multiple users of dbus in the process then SDL could shut it down even though another part is using it.
*/
#if 0
    if (dbus.shutdown) {
        dbus.shutdown();
    }
#endif
    SDL_zero(dbus);
    UnloadDBUSLibrary();
}

@@ -149,90 +165,183 @@
    }
}

void
SDL_DBus_ScreensaverTickle(void)
static SDL_bool
SDL_DBus_CallMethodInternal(DBusConnection *conn, const char *node, const char *path, const char *interface, const char *method, va_list ap)
{
    DBusConnection *conn = dbus.session_conn;
    if (conn != NULL) {
        DBusMessage *msg = dbus.message_new_method_call("org.gnome.ScreenSaver",
                                                        "/org/gnome/ScreenSaver",
                                                        "org.gnome.ScreenSaver",
                                                        "SimulateUserActivity");
        if (msg != NULL) {
            if (dbus.connection_send(conn, msg, NULL)) {
                dbus.connection_flush(conn);
    SDL_bool retval = SDL_FALSE;

    if (conn) {
        DBusMessage *msg = dbus.message_new_method_call(node, path, interface, method);
        if (msg) {
            int firstarg;
            va_list ap_reply;
            va_copy(ap_reply, ap);  /* copy the arg list so we don't compete with D-Bus for it */
            firstarg = va_arg(ap, int);
            if ((firstarg == DBUS_TYPE_INVALID) || dbus.message_append_args_valist(msg, firstarg, ap)) {
                DBusMessage *reply = dbus.connection_send_with_reply_and_block(conn, msg, 300, NULL);
                if (reply) {
                    /* skip any input args, get to output args. */
                    while ((firstarg = va_arg(ap_reply, int)) != DBUS_TYPE_INVALID) {
                        /* we assume D-Bus already validated all this. */
                        { void *dumpptr = va_arg(ap_reply, void*); (void) dumpptr; }
                        if (firstarg == DBUS_TYPE_ARRAY) {
                            { const int dumpint = va_arg(ap_reply, int); (void) dumpint; }
                        }
                    }
                    firstarg = va_arg(ap_reply, int);
                    if ((firstarg == DBUS_TYPE_INVALID) || dbus.message_get_args_valist(reply, NULL, firstarg, ap_reply)) {
                        retval = SDL_TRUE;
                    }
                    dbus.message_unref(reply);
                }
            }
            va_end(ap_reply);
            dbus.message_unref(msg);
        }
    }

    return retval;
}

SDL_bool
SDL_DBus_CallMethodOnConnection(DBusConnection *conn, const char *node, const char *path, const char *interface, const char *method, ...)
{
    SDL_bool retval;
    va_list ap;
    va_start(ap, method);
    retval = SDL_DBus_CallMethodInternal(conn, node, path, interface, method, ap);
    va_end(ap);
    return retval;
}

SDL_bool
SDL_DBus_CallMethod(const char *node, const char *path, const char *interface, const char *method, ...)
{
    SDL_bool retval;
    va_list ap;
    va_start(ap, method);
    retval = SDL_DBus_CallMethodInternal(dbus.session_conn, node, path, interface, method, ap);
    va_end(ap);
    return retval;
}

static SDL_bool
SDL_DBus_CallVoidMethodInternal(DBusConnection *conn, const char *node, const char *path, const char *interface, const char *method, va_list ap)
{
    SDL_bool retval = SDL_FALSE;

    if (conn) {
        DBusMessage *msg = dbus.message_new_method_call(node, path, interface, method);
        if (msg) {
            int firstarg = va_arg(ap, int);
            if ((firstarg == DBUS_TYPE_INVALID) || dbus.message_append_args_valist(msg, firstarg, ap)) {
                if (dbus.connection_send(conn, msg, NULL)) {
                    dbus.connection_flush(conn);
                    retval = SDL_TRUE;
                }
            }

            dbus.message_unref(msg);
        }
    }

    return retval;
}

SDL_bool
SDL_DBus_CallVoidMethodOnConnection(DBusConnection *conn, const char *node, const char *path, const char *interface, const char *method, ...)
{
    SDL_bool retval;
    va_list ap;
    va_start(ap, method);
    retval = SDL_DBus_CallVoidMethodInternal(conn, node, path, interface, method, ap);
    va_end(ap);
    return retval;
}

SDL_bool
SDL_DBus_CallVoidMethod(const char *node, const char *path, const char *interface, const char *method, ...)
{
    SDL_bool retval;
    va_list ap;
    va_start(ap, method);
    retval = SDL_DBus_CallVoidMethodInternal(dbus.session_conn, node, path, interface, method, ap);
    va_end(ap);
    return retval;
}

SDL_bool
SDL_DBus_QueryPropertyOnConnection(DBusConnection *conn, const char *node, const char *path, const char *interface, const char *property, const int expectedtype, void *result)
{
    SDL_bool retval = SDL_FALSE;

    if (conn) {
        DBusMessage *msg = dbus.message_new_method_call(node, path, "org.freedesktop.DBus.Properties", "Get");
        if (msg) {
            if (dbus.message_append_args(msg, DBUS_TYPE_STRING, &interface, DBUS_TYPE_STRING, &property, DBUS_TYPE_INVALID)) {
                DBusMessage *reply = dbus.connection_send_with_reply_and_block(conn, msg, 300, NULL);
                if (reply) {
                    DBusMessageIter iter, sub;
                    dbus.message_iter_init(reply, &iter);
                    if (dbus.message_iter_get_arg_type(&iter) == DBUS_TYPE_VARIANT) {
                        dbus.message_iter_recurse(&iter, &sub);
                        if (dbus.message_iter_get_arg_type(&sub) == expectedtype) {
                            dbus.message_iter_get_basic(&sub, result);
                            retval = SDL_TRUE;
                        }
                    }
                    dbus.message_unref(reply);
                }
            }
            dbus.message_unref(msg);
        }
    }

    return retval;
}

SDL_bool
SDL_DBus_QueryProperty(const char *node, const char *path, const char *interface, const char *property, const int expectedtype, void *result)
{
    return SDL_DBus_QueryPropertyOnConnection(dbus.session_conn, node, path, interface, property, expectedtype, result);
}


void
SDL_DBus_ScreensaverTickle(void)
{
    SDL_DBus_CallVoidMethod("org.gnome.ScreenSaver", "/org/gnome/ScreenSaver", "org.gnome.ScreenSaver", "SimulateUserActivity", DBUS_TYPE_INVALID);
}

SDL_bool
SDL_DBus_ScreensaverInhibit(SDL_bool inhibit)
{
    DBusConnection *conn = dbus.session_conn;

    if (conn == NULL)
        return SDL_FALSE;

    if (inhibit &&
        screensaver_cookie != 0)
        return SDL_TRUE;
    if (!inhibit &&
        screensaver_cookie == 0)
        return SDL_TRUE;

    if (inhibit) {
        const char *app = "My SDL application";
        const char *reason = "Playing a game";

        DBusMessage *msg = dbus.message_new_method_call("org.freedesktop.ScreenSaver",
                                                         "/org/freedesktop/ScreenSaver",
                                                         "org.freedesktop.ScreenSaver",
                                                         "Inhibit");
        if (msg != NULL) {
            dbus.message_append_args (msg,
                                      DBUS_TYPE_STRING, &app,
                                      DBUS_TYPE_STRING, &reason,
                                      DBUS_TYPE_INVALID);
        }

        if (msg != NULL) {
            DBusMessage *reply;

            reply = dbus.connection_send_with_reply_and_block(conn, msg, 300, NULL);
            if (reply) {
                if (!dbus.message_get_args(reply, NULL,
                                           DBUS_TYPE_UINT32, &screensaver_cookie,
                                           DBUS_TYPE_INVALID))
                    screensaver_cookie = 0;
                dbus.message_unref(reply);
            }

            dbus.message_unref(msg);
        }

        if (screensaver_cookie == 0) {
            return SDL_FALSE;
        }
    if ( (inhibit && (screensaver_cookie != 0)) || (!inhibit && (screensaver_cookie == 0)) ) {
        return SDL_TRUE;
    } else {
        DBusMessage *msg = dbus.message_new_method_call("org.freedesktop.ScreenSaver",
                                                        "/org/freedesktop/ScreenSaver",
                                                        "org.freedesktop.ScreenSaver",
                                                        "UnInhibit");
        dbus.message_append_args (msg,
                                  DBUS_TYPE_UINT32, &screensaver_cookie,
                                  DBUS_TYPE_INVALID);
        if (msg != NULL) {
            if (dbus.connection_send(conn, msg, NULL)) {
                dbus.connection_flush(conn);
            }
            dbus.message_unref(msg);
        }
        const char *node = "org.freedesktop.ScreenSaver";
        const char *path = "/org/freedesktop/ScreenSaver";
        const char *interface = "org.freedesktop.ScreenSaver";

        screensaver_cookie = 0;
        return SDL_TRUE;
        if (inhibit) {
            const char *app = "My SDL application";
            const char *reason = "Playing a game";
            if (!SDL_DBus_CallMethod(node, path, interface, "Inhibit",
                    DBUS_TYPE_STRING, &app, DBUS_TYPE_STRING, &reason, DBUS_TYPE_INVALID,
                    DBUS_TYPE_UINT32, &screensaver_cookie, DBUS_TYPE_INVALID)) {
                return SDL_FALSE;
            }
            return (screensaver_cookie != 0) ? SDL_TRUE : SDL_FALSE;
        } else {
            if (!SDL_DBus_CallVoidMethod(node, path, interface, "UnInhibit", DBUS_TYPE_UINT32, &screensaver_cookie, DBUS_TYPE_INVALID)) {
                return SDL_FALSE;
            }
            screensaver_cookie = 0;
        }
    }

    return SDL_TRUE;
}
#endif

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