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>
53 #include <osg/Texture>
54 #include <osg/BufferObject>
61 #include <Viewer/fgviewer.hxx>
63 #include <Main/globals.hxx>
64 #include <Main/fg_props.hxx>
65 #include <GUI/MessageBox.hxx>
70 #include <GUI/CocoaHelpers.h> // for transformToForegroundApp
76 // forward declaration.
79 static bool fpeAbort = false;
80 static void initFPE();
82 #if defined(HAVE_FEENABLEEXCEPT)
83 static void handleFPE(int);
88 int except = fegetexcept();
89 feenableexcept(except | FE_DIVBYZERO | FE_INVALID);
91 signal(SIGFPE, handleFPE);
95 static void handleFPE(int)
97 feclearexcept(FE_ALL_EXCEPT);
98 signal(SIGFPE, handleFPE);
100 #elif defined(__linux__) && defined(__i386__)
102 static void handleFPE(int);
106 fpu_control_t fpe_flags = 0;
107 _FPU_GETCW(fpe_flags);
108 // fpe_flags &= ~_FPU_MASK_IM; // invalid operation
109 // fpe_flags &= ~_FPU_MASK_DM; // denormalized operand
110 // fpe_flags &= ~_FPU_MASK_ZM; // zero-divide
111 // fpe_flags &= ~_FPU_MASK_OM; // overflow
112 // fpe_flags &= ~_FPU_MASK_UM; // underflow
113 // fpe_flags &= ~_FPU_MASK_PM; // precision (inexact result)
114 _FPU_SETCW(fpe_flags);
115 signal(SIGFPE, handleFPE);
122 SG_LOG(SG_GENERAL, SG_ALERT, "Floating point interrupt (SIGFPE)");
125 static void initFPE()
130 #if defined(SG_WINDOWS)
131 int main ( int argc, char **argv );
132 int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
133 LPSTR lpCmdLine, int nCmdShow) {
135 main( __argc, __argv );
139 static void fg_terminate() {
141 "Uncaught Exception: missing exception handler on some thread"
146 int _bootstrap_OSInit;
148 // Main entry point; catch any exceptions that have made it this far.
149 int main ( int argc, char **argv )
151 #if defined(SG_WINDOWS)
152 // Don't show blocking "no disk in drive" error messages on Windows 7,
153 // silently return errors to application instead.
154 // See Microsoft MSDN #ms680621: "GUI apps should specify SEM_NOOPENFILEERRORBOX"
155 SetErrorMode(SEM_NOOPENFILEERRORBOX);
157 hostname = ::getenv( "COMPUTERNAME" );
159 // Unix(alike) systems
161 gethostname(_hostname, 256);
162 hostname = _hostname;
164 signal(SIGPIPE, SIG_IGN);
168 // required so native messages boxes work prior to osgViewer init
169 // (only needed when not running as a bundled app)
170 transformToForegroundApp();
173 #ifdef PTW32_STATIC_LIB
174 // Initialise static pthread win32 lib
175 pthread_win32_process_attach_np ();
177 _bootstrap_OSInit = 0;
179 #if defined(__FreeBSD__)
180 // Ignore floating-point exceptions on FreeBSD
181 signal(SIGFPE, SIG_IGN);
183 // Maybe Enable floating-point exceptions on Linux
184 for (int i = 0; i < argc; ++i) {
185 if (!strcmp("--enable-fpe", argv[i])) {
193 // Enable floating-point exceptions for Windows
194 #if defined( _MSC_VER ) && defined( DEBUG )
195 // Christian, we should document what this does
196 _control87( _EM_INEXACT, _MCW_EM );
199 bool fgviewer = false;
200 for (int i = 0; i < argc; ++i) {
201 if (!strcmp("--fgviewer", argv[i])) {
207 // FIXME: add other, more specific
210 // http://code.google.com/p/flightgear-bugs/issues/detail?id=1231
211 // ensure sglog is inited before atexit() is registered, so logging
212 // is possible inside fgExitCleanup
215 // similar to above, ensure some static maps inside OSG exist before
216 // we register our at-exit handler, otherwise the statics are gone
217 // when fg_terminate runs, which causes crashes.
218 osg::Texture::getTextureObjectManager(0);
219 osg::GLBufferObjectManager::getGLBufferObjectManager(0);
221 std::set_terminate(fg_terminate);
222 atexit(fgExitCleanup);
224 fgviewerMain(argc, argv);
226 fgMainInit(argc, argv);
229 } catch (const sg_throwable &t) {
231 if (std::strlen(t.getOrigin()) != 0)
232 info = std::string("received from ") + t.getOrigin();
233 flightgear::fatalMessageBox("Fatal exception", t.getFormattedMessage(), info);
235 } catch (const std::exception &e ) {
236 flightgear::fatalMessageBox("Fatal exception", e.what());
237 } catch (const std::string &s) {
238 flightgear::fatalMessageBox("Fatal exception", s);
239 } catch (const char *s) {
240 cerr << "Fatal error (const char*): " << s << endl;
243 cerr << "Unknown exception in the main loop. Aborting..." << endl;
245 perror("Possible cause");
251 // do some clean up on exit. Specifically we want to delete the sound-manager,
252 // so OpenAL device and context are released cleanly
253 void fgExitCleanup() {
255 if (_bootstrap_OSInit != 0) {
256 fgSetMouseCursor(MOUSE_CURSOR_POINTER);
261 // on the common exit path globals is already deleted, and NULL,
262 // so this only happens on error paths.