//
// Written by Curtis Olson, started May 1997.
//
-// Copyright (C) 1997 - 2002 Curtis L. Olson - curt@flightgear.org
+// Copyright (C) 1997 - 2002 Curtis L. Olson - http://www.flightgear.org/~curt
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
# include <signal.h>
#endif
+#include <errno.h>
#include <stdlib.h>
+#include <stdio.h>
#include <simgear/compiler.h>
#include <simgear/structure/exception.hxx>
SG_USING_STD(endl);
#include "main.hxx"
+#include "globals.hxx"
#ifdef HAVE_WINDOWS_H
# include <console.h> // -dw- for command line dialog
#endif
+char *homedir = ::getenv( "HOME" );
+char *hostname = ::getenv( "HOSTNAME" );
+bool free_hostname = false;
+
+// foreward declaration.
+void fgExitCleanup();
#if defined(__linux__) && defined(__i386__)
#if defined( sgi )
#include <sys/fpu.h>
+#include <sys/sysmp.h>
+#include <unistd.h>
/*
- set the special "flush zero" bit (FS, bit 24) in the Control Status
- Register of the FPU of R4k and beyond so that the result of any
- underflowing operation will be clamped to zero, and no exception of
- any kind will be generated on the CPU. This has no effect on an
- R3000.
-
- the FS bit is inherited by processes fork()ed out of this one,
- but it is not inherited across an exec(). so anytime you exec()
- a process, you must re-set the FS bit in that process.
- */
+ * set the special "flush zero" bit (FS, bit 24) in the Control Status
+ * Register of the FPU of R4k and beyond so that the result of any
+ * underflowing operation will be clamped to zero, and no exception of
+ * any kind will be generated on the CPU. This has no effect on an
+ * R3000.
+ */
void flush_fpe(void)
{
union fpc_csr f;
}
#endif
+int _bootstrap_OSInit;
+
// Main entry point; catch any exceptions that have made it this far.
int main ( int argc, char **argv ) {
+ _bootstrap_OSInit = 0;
+
// Enable floating-point exceptions for Linux/x86
#if defined(__linux__) && defined(__i386__)
initFPE();
#if defined(sgi)
flush_fpe();
+
+ // Bind all non-rendering threads to CPU1
+ // This will reduce the jitter caused by them to an absolute minimum,
+ // but it will only work with superuser authority.
+ if ( geteuid() == 0 )
+ {
+ sysmp(MP_CLOCK, 0); // bind the timer only to CPU0
+ sysmp(MP_ISOLATE, 1 ); // Isolate CPU1
+ sysmp(MP_NONPREEMPTIVE, 1 ); // disable process time slicing on CPU1
+ }
#endif
// Enable floating-point exceptions for Windows
PSN psn;
fgOSInit (&argc, argv);
+ _bootstrap_OSInit++;
CPSGetCurrentProcess(&psn);
CPSSetProcessName(&psn, "FlightGear");
// FIXME: add other, more specific
// exceptions.
try {
+ atexit(fgExitCleanup);
fgMainInit(argc, argv);
} catch (sg_throwable &t) {
// We must use cerr rather than
// logging, since logging may be
// disabled.
- cerr << "Fatal error: " << t.getFormattedMessage()
- << "\n (received from " << t.getOrigin() << ')' << endl;
- exit(1);
+ cerr << "Fatal error: " << t.getFormattedMessage() << endl;
+ if (!t.getOrigin().empty())
+ cerr << " (received from " << t.getOrigin() << ')' << endl;
+
+ } catch (...) {
+ cerr << "Unknown exception in the main loop. Aborting..." << endl;
+ if (errno)
+ perror("Possible cause");
}
return 0;
}
+// do some clean up on exit. Specifically we want to call alutExit()
+// which happens in the sound manager destructor.
+void fgExitCleanup() {
+
+ if (_bootstrap_OSInit != 0)
+ fgSetMouseCursor(MOUSE_CURSOR_POINTER);
+
+ delete globals;
+
+ if (free_hostname && hostname != NULL)
+ free(hostname);
+}