1 // bootstrap.cxx -- bootstrap routines: main()
3 // Written by Curtis Olson, started May 1997.
5 // Copyright (C) 1997 - 2002 Curtis L. Olson - http://www.flightgear.org/~curt
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License as
9 // published by the Free Software Foundation; either version 2 of the
10 // License, or (at your option) any later version.
12 // This program is distributed in the hope that it will be useful, but
13 // WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 // General Public License for more details.
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, write to the Free Software
19 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
32 #if defined(HAVE_FEENABLEEXCEPT)
37 #elif defined(__linux__) && defined(__i386__)
38 # include <fpu_control.h>
42 # include <unistd.h> // for gethostname()
50 #include <simgear/compiler.h>
51 #include <simgear/structure/exception.hxx>
58 #include <Viewer/fgviewer.hxx>
60 #include <Main/globals.hxx>
61 #include <Main/fg_props.hxx>
62 #include <GUI/MessageBox.hxx>
67 #include <GUI/CocoaHelpers.h> // for transformToForegroundApp
73 // forward declaration.
76 static bool fpeAbort = false;
77 static void initFPE();
79 #if defined(HAVE_FEENABLEEXCEPT)
80 static void handleFPE(int);
85 int except = fegetexcept();
86 feenableexcept(except | FE_DIVBYZERO | FE_INVALID);
88 signal(SIGFPE, handleFPE);
92 static void handleFPE(int)
94 feclearexcept(FE_ALL_EXCEPT);
95 signal(SIGFPE, handleFPE);
97 #elif defined(__linux__) && defined(__i386__)
99 static void handleFPE(int);
103 fpu_control_t fpe_flags = 0;
104 _FPU_GETCW(fpe_flags);
105 // fpe_flags &= ~_FPU_MASK_IM; // invalid operation
106 // fpe_flags &= ~_FPU_MASK_DM; // denormalized operand
107 // fpe_flags &= ~_FPU_MASK_ZM; // zero-divide
108 // fpe_flags &= ~_FPU_MASK_OM; // overflow
109 // fpe_flags &= ~_FPU_MASK_UM; // underflow
110 // fpe_flags &= ~_FPU_MASK_PM; // precision (inexact result)
111 _FPU_SETCW(fpe_flags);
112 signal(SIGFPE, handleFPE);
119 SG_LOG(SG_GENERAL, SG_ALERT, "Floating point interrupt (SIGFPE)");
122 static void initFPE()
127 #if defined(SG_WINDOWS)
128 int main ( int argc, char **argv );
129 int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
130 LPSTR lpCmdLine, int nCmdShow) {
132 main( __argc, __argv );
136 static void fg_terminate() {
138 "Uncaught Exception: missing exception handler on some thread"
143 int _bootstrap_OSInit;
145 // Main entry point; catch any exceptions that have made it this far.
146 int main ( int argc, char **argv )
148 #if defined(SG_WINDOWS)
149 // Don't show blocking "no disk in drive" error messages on Windows 7,
150 // silently return errors to application instead.
151 // See Microsoft MSDN #ms680621: "GUI apps should specify SEM_NOOPENFILEERRORBOX"
152 SetErrorMode(SEM_NOOPENFILEERRORBOX);
154 hostname = ::getenv( "COMPUTERNAME" );
156 // Unix(alike) systems
158 gethostname(_hostname, 256);
159 hostname = _hostname;
161 signal(SIGPIPE, SIG_IGN);
165 // required so native messages boxes work prior to osgViewer init
166 // (only needed when not running as a bundled app)
167 transformToForegroundApp();
170 #ifdef PTW32_STATIC_LIB
171 // Initialise static pthread win32 lib
172 pthread_win32_process_attach_np ();
174 _bootstrap_OSInit = 0;
176 #if defined(__FreeBSD__)
177 // Ignore floating-point exceptions on FreeBSD
178 signal(SIGFPE, SIG_IGN);
180 // Maybe Enable floating-point exceptions on Linux
181 for (int i = 0; i < argc; ++i) {
182 if (!strcmp("--enable-fpe", argv[i])) {
190 // Enable floating-point exceptions for Windows
191 #if defined( _MSC_VER ) && defined( DEBUG )
192 // Christian, we should document what this does
193 _control87( _EM_INEXACT, _MCW_EM );
196 bool fgviewer = false;
197 for (int i = 0; i < argc; ++i) {
198 if (!strcmp("--fgviewer", argv[i])) {
204 // FIXME: add other, more specific
207 // http://code.google.com/p/flightgear-bugs/issues/detail?id=1231
208 // ensure sglog is inited before atexit() is registered, so logging
209 // is possible inside fgExitCleanup
212 std::set_terminate(fg_terminate);
213 atexit(fgExitCleanup);
215 fgviewerMain(argc, argv);
217 fgMainInit(argc, argv);
220 } catch (const sg_throwable &t) {
222 if (std::strlen(t.getOrigin()) != 0)
223 info = std::string("received from ") + t.getOrigin();
224 flightgear::fatalMessageBox("Fatal exception", t.getFormattedMessage(), info);
226 } catch (const std::exception &e ) {
227 flightgear::fatalMessageBox("Fatal exception", e.what());
228 } catch (const std::string &s) {
229 flightgear::fatalMessageBox("Fatal exception", s);
230 } catch (const char *s) {
231 cerr << "Fatal error (const char*): " << s << endl;
234 cerr << "Unknown exception in the main loop. Aborting..." << endl;
236 perror("Possible cause");
242 // do some clean up on exit. Specifically we want to delete the sound-manager,
243 // so OpenAL device and context are released cleanly
244 void fgExitCleanup() {
246 if (_bootstrap_OSInit != 0)
247 fgSetMouseCursor(MOUSE_CURSOR_POINTER);
249 // on the common exit path globals is already deleted, and NULL,
250 // so this only happens on error paths.