Edit
kc3-lang/SDL/src/core/linux/SDL_dbus.c
Ryan C. Gordon
- src/core/linux/SDL_dbus.c
-
/* Simple DirectMedia Layer Copyright (C) 1997-2017 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 arising from the use of this software. Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions: 1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required. 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. 3. This notice may not be removed or altered from any source distribution. */ #include "../../SDL_internal.h" #include "SDL_dbus.h" #if SDL_USE_LIBDBUS /* we never link directly to libdbus. */ #include "SDL_loadso.h" static const char *dbus_library = "libdbus-1.so.3"; static void *dbus_handle = NULL; static unsigned int screensaver_cookie = 0; static SDL_DBusContext dbus; static int LoadDBUSSyms(void) { #define SDL_DBUS_SYM2(x, y) \ if (!(dbus.x = SDL_LoadFunction(dbus_handle, #y))) return -1 #define SDL_DBUS_SYM(x) \ SDL_DBUS_SYM2(x, dbus_##x) SDL_DBUS_SYM(bus_get_private); SDL_DBUS_SYM(bus_register); SDL_DBUS_SYM(bus_add_match); SDL_DBUS_SYM(connection_open_private); 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); SDL_DBUS_SYM(connection_unref); SDL_DBUS_SYM(connection_flush); SDL_DBUS_SYM(connection_read_write); SDL_DBUS_SYM(connection_dispatch); 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); SDL_DBUS_SYM(message_iter_get_arg_type); SDL_DBUS_SYM(message_iter_recurse); SDL_DBUS_SYM(message_unref); SDL_DBUS_SYM(error_init); SDL_DBUS_SYM(error_is_set); 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 #undef SDL_DBUS_SYM2 return 0; } static void UnloadDBUSLibrary(void) { if (dbus_handle != NULL) { SDL_UnloadObject(dbus_handle); dbus_handle = NULL; } } static int LoadDBUSLibrary(void) { int retval = 0; if (dbus_handle == NULL) { dbus_handle = SDL_LoadObject(dbus_library); if (dbus_handle == NULL) { retval = -1; /* Don't call SDL_SetError(): SDL_LoadObject already did. */ } else { retval = LoadDBUSSyms(); if (retval < 0) { UnloadDBUSLibrary(); } } } return retval; } void SDL_DBus_Init(void) { if (!dbus.session_conn && LoadDBUSLibrary() != -1) { 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); 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); } } 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); } if (dbus.shutdown) { dbus.shutdown(); } SDL_zero(dbus); UnloadDBUSLibrary(); } SDL_DBusContext * SDL_DBus_GetContext(void) { if(!dbus_handle || !dbus.session_conn){ SDL_DBus_Init(); } if(dbus_handle && dbus.session_conn){ return &dbus; } else { return NULL; } } static SDL_bool SDL_DBus_CallMethodInternal(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)) { DBusMessage *reply = dbus.connection_send_with_reply_and_block(conn, msg, 300, NULL); if (reply) { firstarg = va_arg(ap, int); if ((firstarg == DBUS_TYPE_INVALID) || dbus.message_get_args_valist(reply, NULL, firstarg, ap)) { retval = SDL_TRUE; } dbus.message_unref(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) { if ( (inhibit && (screensaver_cookie != 0)) || (!inhibit && (screensaver_cookie == 0)) ) { return SDL_TRUE; } else { const char *node = "org.freedesktop.ScreenSaver"; const char *path = "/org/freedesktop/ScreenSaver"; const char *interface = "org.freedesktop.ScreenSaver"; 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 /* vi: set ts=4 sw=4 expandtab: */