// Berkeley Open Infrastructure for Network Computing // http://boinc.berkeley.edu // Copyright (C) 2005 University of California // // This 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 2.1 of the License, or (at your option) any later version. // // This software 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. // // To view the GNU Lesser General Public License visit // http://www.gnu.org/copyleft/lesser.html // or write to the Free Software Foundation, Inc., // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA #include #include #include #include #include #include #include "x_opengl.h" #include "app_ipc.h" #include "util.h" #include "filesys.h" #include "boinc_gl.h" #include "graphics_api.h" #include "graphics_impl.h" #define BOINC_WINDOW_CLASS_NAME "BOINC_app" #define TIMER_INTERVAL_MSEC 30 static bool visible = true; static int current_graphics_mode = MODE_HIDE_GRAPHICS; static int acked_graphics_mode; static int xpos = 100, ypos = 100; static int clicked_button; static int win=0; static bool glut_is_initialized = false; static jmp_buf jbuf; // longjump/setjump for exit/signal handler static struct sigaction original_signal_handler; // store previous ABRT signal-handler static void set_mode(int mode); static void restart(void); static void boinc_glut_init(void); static APP_INIT_DATA aid; extern pthread_t graphics_thread; // thread info extern pthread_t worker_thread; enum { JUMP_NONE = 0, JUMP_EXIT, JUMP_ABORT, JUMP_LAST }; // possible longjmp-values to signal from where we jumped: // 1= exit caught by atexit, 2 = signal caught by handler int xwin_glut_is_initialized() { return glut_is_initialized; } void app_debug_msg (char *fmt, ...); // This callback is invoked when a user presses a key. // void keyboardD(unsigned char key, int x, int y) { if (current_graphics_mode == MODE_FULLSCREEN) { set_mode(MODE_HIDE_GRAPHICS); } } void keyboardU(unsigned char key, int x, int y) { if (current_graphics_mode == MODE_FULLSCREEN) { set_mode(MODE_HIDE_GRAPHICS); } } void mouse_click(int button, int state, int x, int y){ clicked_button = button; if (current_graphics_mode == MODE_FULLSCREEN) { set_mode(MODE_HIDE_GRAPHICS); } else { if (state) { boinc_app_mouse_button(x, y, button, false); } else { boinc_app_mouse_button(x, y, button, true); } } } void mouse_click_move(int x, int y){ if (current_graphics_mode == MODE_FULLSCREEN){ set_mode(MODE_HIDE_GRAPHICS); } else if (clicked_button == 2){ boinc_app_mouse_move(x, y, false, false, true); } else if (clicked_button == 1){ boinc_app_mouse_move(x, y, false, true, false); } else if (clicked_button == 0){ boinc_app_mouse_move(x, y, true, false, false); } else{ boinc_app_mouse_move(x, y, false, false, false); } } static void maybe_render() { int width, height; if (visible && (current_graphics_mode != MODE_HIDE_GRAPHICS)) { width = glutGet(GLUT_WINDOW_WIDTH); height = glutGet(GLUT_WINDOW_HEIGHT); if (throttled_app_render(width, height, dtime())) { glutSwapBuffers(); } } } static void make_new_window(int mode) { if ( (mode != MODE_WINDOW) && (mode != MODE_FULLSCREEN) ) // nothing to be done here return; if ( ! glut_is_initialized ) //initialize glut if necessary boinc_glut_init(); app_debug_msg("make_new_window(): now calling glutCreateWindow(%s)...\n", aid.app_name); win = glutCreateWindow(aid.app_name); app_debug_msg("glutCreateWindow() succeeded. win = %d\n", win); // installing callbacks for the current window glutReshapeFunc(app_graphics_resize); glutKeyboardFunc(keyboardD); glutKeyboardUpFunc(keyboardU); glutMouseFunc(mouse_click); glutMotionFunc(mouse_click_move); glutDisplayFunc(maybe_render); glEnable(GL_DEPTH_TEST); app_graphics_init(); if (mode == MODE_FULLSCREEN) glutFullScreen(); return; } // make_new_window() // initialized glut and screensaver-graphics // this should only called once, even if restarted by user-exit static void boinc_glut_init(void) { char* args[2] = {"screensaver", NULL}; int one=1; app_debug_msg("Calling glutInit()... \n"); glutInit (&one, args); app_debug_msg("...survived glutInit(). \n"); glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH); glutInitWindowPosition(xpos, ypos); glutInitWindowSize(600, 400); g_bmsp->boinc_get_init_data_hook(aid); if (!strlen(aid.app_name)) strcpy(aid.app_name, "BOINC Application"); glut_is_initialized = true; return; } // boinc_glut_init() // Destroy current window if any void KillWindow() { if (win) { int oldwin = win; win = 0; // set this to 0 FIRST to avoid recursion if the following call fails. glutDestroyWindow(oldwin); } } void set_mode(int mode) { if (mode == current_graphics_mode) return; app_debug_msg("set_mode(%d): current_mode = %d. Calling KillWindow(): win = %d\n", mode, current_graphics_mode, win); KillWindow(); app_debug_msg("...KillWindow() survived.\n"); if (mode != MODE_HIDE_GRAPHICS) { app_debug_msg("set_mode(): Calling make_new_window(%d)\n", mode); make_new_window(mode); app_debug_msg("...make_new_window() survived.\n"); } current_graphics_mode = mode; return; } // set_mode() static void wait_for_initial_message() { (*g_bmsp->app_client_shmp)->shm->graphics_reply.send_msg( xml_graphics_modes[MODE_HIDE_GRAPHICS] ); acked_graphics_mode = MODE_HIDE_GRAPHICS; while (1) { if ((*g_bmsp->app_client_shmp)->shm->graphics_request.has_msg()) { break; } sleep(1); } return; } // wait_for_initial_message() static void timer_handler(int) { char buf[MSG_CHANNEL_SIZE]; GRAPHICS_MSG m; int new_mode; if (*g_bmsp->app_client_shmp) { if ((*g_bmsp->app_client_shmp)->shm->graphics_request.get_msg(buf)) { (*g_bmsp->app_client_shmp)->decode_graphics_msg(buf, m); switch (m.mode) { case MODE_REREAD_PREFS: //only reread graphics prefs if we have a window open // switch (current_graphics_mode){ case MODE_WINDOW: case MODE_FULLSCREEN: app_graphics_reread_prefs(); break; } break; case MODE_HIDE_GRAPHICS: case MODE_WINDOW: case MODE_FULLSCREEN: case MODE_BLANKSCREEN: set_mode(m.mode); break; } } if (acked_graphics_mode != current_graphics_mode) { bool sent = (*g_bmsp->app_client_shmp)->shm->graphics_reply.send_msg( xml_graphics_modes[current_graphics_mode] ); if (sent) acked_graphics_mode = current_graphics_mode; } } maybe_render(); glutTimerFunc(TIMER_INTERVAL_MSEC, timer_handler, 0); return; } // timer_handler() // exit handler: really only meant to handle exits() called by GLUT... void restart() { // don't do anything except when exit is called from the graphics-thread if ( !pthread_equal(pthread_self(), graphics_thread) ) app_debug_msg ("exit() was called from worker-thread\n"); else { app_debug_msg ("exit() called from graphics-thread.\n"); // if we are standalone and glut was initialized, we assume user pressed 'close', and we exit the app if ( boinc_is_standalone() && glut_is_initialized ) { app_debug_msg("Assuming user pressed 'close'... means we're exiting now.\n"); if ( boinc_delete_file(LOCKFILE) != 0) perror ("Failed to remove lockfile..\n"); return; } // re-install the exit-handler to catch glut's notorious exits()... atexit(restart); // jump back to entry-point in xwin_graphics_event_loop(); app_debug_msg( "Jumping back to event_loop.\n"); longjmp(jbuf, JUMP_EXIT); } // if in graphics-thread return; } // restart() // deal with ABORT's, typically raised by GLUT // If we are in the graphics thread, we just return back // into xwin_graphics_event_loop. If we are in the main thread, then // restore the old signal handler and raise SIGABORT. void restart_sig(int signal_number) { if ( pthread_equal(pthread_self(), graphics_thread) ) { // alternative approach is for the signal hander to call exit(). fprintf(stderr, "Caught SIGABRT in graphics thread\n"); app_debug_msg ("Caught SIGABRT in graphics thread. Jumping back to xwin_graphics_event_loop()...\n"); // jump back to entry-point in xwin_graphics_event_loop() longjmp(jbuf, JUMP_ABORT); } // if ABRT raised in graphics-thread else { // In non-graphics thread: use original signal handler fprintf(stderr, "Caught SIGABRT in non-graphics thread\n"); app_debug_msg ("Caught SIGABRT in non-graphics thread. Trying to call previous ABRT-handler...\n"); if (sigaction(SIGABRT, &original_signal_handler, NULL)) { perror("Unable to restore SIGABRT signal handler in non-graphics thread\n"); // what to do? call abort(3)?? call exit(nonzero)??? // Here we just return. } else { // we could conceivably try to call the old signal handler // directly. But this means checking how its flags/masks // are set, making sure it's not NULL (for no action) and so // on. This seems simpler and more robust. On the other // hand it may take some time for the signal to be // delivered, and during that time, what's going to be // executing? raise(SIGABRT); } } // if ABRT raised in non-graphics thread return; } // restart_sig() // graphics thread main-function // NOTE: this should only be called *ONCE* by an application void xwin_graphics_event_loop() { int restarted = 0; app_debug_msg ("Direct call to xwin_graphics_event_loop()\n"); struct sigaction sa; sa.sa_handler = restart_sig; sa.sa_flags = SA_RESTART; // install signal handler to catch abort() from GLUT. Note that // signal handlers are global to ALL threads, so the signal // handler that we record here in &original_signal_handler is the // previous one that applied to BOTH threads if (sigaction(SIGABRT, &sa, &original_signal_handler)) { perror("unable to install signal handler to catch SIGABORT"); } // handle glut's notorious exits().. atexit(restart); // THIS IS THE re-entry point at exit or ABORT in the graphics-thread restarted = setjmp(jbuf); // if we came here from an ABORT-signal thrown in this thread, we put this thread to sleep if ( restarted == JUMP_ABORT ) while(1) sleep(1); //---------------------------------------------------------------------- // running in standalone-mode: if ( boinc_is_standalone() ) { if (restarted) while(1) sleep(1); // assuming glutInit() failed: put graphics-thread to sleep else { // open the graphics-window set_mode(MODE_WINDOW); glutTimerFunc(TIMER_INTERVAL_MSEC, timer_handler, 0); } } // if boinc_is_standalone //---------------------------------------------------------------------- // runing under BOINC-client: else { if ( !glut_is_initialized ) { set_mode(MODE_HIDE_GRAPHICS); while ( current_graphics_mode == MODE_HIDE_GRAPHICS ) { app_debug_msg ("Graphics-thread now waiting for client-message...\n"); wait_for_initial_message(); app_debug_msg ("got a graphics-message from client... \n"); timer_handler(0); } // while MODE_HIDE_GRAPHICS } // glut_is_initialized = false else // here glut has been initialized previously // probably the user pressed window-'close' set_mode(MODE_HIDE_GRAPHICS); // close any previously open windows }// if running under BOINC //---------------------------------------------------------------------- // ok we should be ready & initialized by now to call glutMainLoop() app_debug_msg ("now calling glutMainLoop()...\n"); glutMainLoop(); app_debug_msg("...glutMainLoop() returned!! This should never happen...\n"); return; } // xwin_graphics_event_loop() /* RP's little APP-debug output function: */ void app_debug_msg (char *fmt, ...) { #ifndef _DEBUG return; #else va_list args; char buffer[5000+1]; static char *boinc_slotdir = NULL; va_start (args, fmt); if (boinc_slotdir == NULL) { char *tmp, *ptr; if ( (tmp = getcwd(NULL, 0)) == NULL) { perror ("failed to get working directory using getcwd()"); boinc_slotdir = (char*)calloc(1, 20); strcpy( boinc_slotdir, "[unknown]"); } else { if ( (ptr = strrchr(tmp, '/')) == NULL) ptr = tmp; else ptr ++; boinc_slotdir = (char*)calloc(1, strlen(ptr)+1); strcpy(boinc_slotdir, ptr); free (tmp); } /* got cwd */ } vsnprintf (buffer, 5000, fmt, args); fprintf (stdout, "APP '%s' DEBUG: ", boinc_slotdir); fprintf (stdout, buffer); fflush (stdout); va_end (args); #endif // defined _DEBUG } // app_debug_msg() const char *BOINC_RCSID_c457a14644 = "$Id$";