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/************
*
* This file is part of the vector graphics language Asymptote
* Copyright (C) 2004 Andy Hammerlindl, John C. Bowman, Tom Prince
* http://asymptote.sourceforge.net
*
* This program 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 3 of the License, or
* (at your option) any later version.
*
* This program 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.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*************/
#ifdef __CYGWIN__
#define _POSIX_C_SOURCE 200809L
#endif
#include <iostream>
#include <cstdlib>
#include <cerrno>
#include <sys/wait.h>
#include <sys/types.h>
#include "common.h"
#ifdef HAVE_LIBSIGSEGV
#include <sigsegv.h>
#endif
#include "errormsg.h"
#include "fpu.h"
#include "settings.h"
#include "locate.h"
#include "interact.h"
#include "process.h"
#include "stack.h"
using namespace settings;
using interact::interactive;
namespace run {
void purge();
}
#ifdef PROFILE
namespace vm {
extern void dumpProfile();
};
#endif
#ifdef HAVE_LIBSIGSEGV
void stackoverflow_handler (int, stackoverflow_context_t)
{
em.runtime(vm::getPos());
cerr << "Stack overflow" << endl;
abort();
}
int sigsegv_handler (void *, int emergency)
{
if(!emergency) return 0; // Really a stack overflow
em.runtime(vm::getPos());
#ifdef HAVE_GL
if(gl::glthread)
cerr << "Stack overflow or segmentation fault: rerun with -nothreads"
<< endl;
else
#endif
cerr << "Segmentation fault" << endl;
abort();
}
#endif
void setsignal(RETSIGTYPE (*handler)(int))
{
#ifdef HAVE_LIBSIGSEGV
char mystack[16384];
stackoverflow_install_handler(&stackoverflow_handler,
mystack,sizeof (mystack));
sigsegv_install_handler(&sigsegv_handler);
#endif
Signal(SIGBUS,handler);
Signal(SIGFPE,handler);
}
void signalHandler(int)
{
// Print the position and trust the shell to print an error message.
em.runtime(vm::getPos());
Signal(SIGBUS,SIG_DFL);
Signal(SIGFPE,SIG_DFL);
}
void interruptHandler(int)
{
em.Interrupt(true);
}
struct Args
{
int argc;
char **argv;
Args(int argc, char **argv) : argc(argc), argv(argv) {}
};
void *asymain(void *A)
{
setsignal(signalHandler);
Args *args=(Args *) A;
fpu_trap(trap());
if(interactive) {
Signal(SIGINT,interruptHandler);
processPrompt();
} else if (getSetting<bool>("listvariables") && numArgs()==0) {
try {
doUnrestrictedList();
} catch(handled_error) {
em.statusError();
}
} else {
int n=numArgs();
if(n == 0)
processFile("-");
else
for(int ind=0; ind < n; ind++) {
processFile(string(getArg(ind)),n > 1);
try {
if(ind < n-1)
setOptions(args->argc,args->argv);
} catch(handled_error) {
em.statusError();
}
}
}
#ifdef PROFILE
vm::dumpProfile();
#endif
if(getSetting<bool>("wait")) {
int status;
while(wait(&status) > 0);
}
#ifdef HAVE_GL
#ifdef HAVE_PTHREAD
if(gl::glthread && !getSetting<bool>("offscreen")) {
pthread_kill(gl::mainthread,SIGUSR2);
pthread_join(gl::mainthread,NULL);
}
#endif
#endif
exit(em.processStatus() || interact::interactive ? 0 : 1);
}
void exitHandler(int)
{
exit(0);
}
int main(int argc, char *argv[])
{
#ifdef HAVE_LIBGSL
unsetenv("GSL_RNG_SEED");
unsetenv("GSL_RNG_TYPE");
#endif
setsignal(signalHandler);
try {
setOptions(argc,argv);
} catch(handled_error) {
em.statusError();
}
Args args(argc,argv);
#ifdef HAVE_GL
#ifdef __APPLE__
bool usethreads=true;
#else
bool usethreads=view();
#endif
gl::glthread=usethreads ? getSetting<bool>("threads") : false;
#if HAVE_PTHREAD
if(gl::glthread) {
pthread_t thread;
try {
if(pthread_create(&thread,NULL,asymain,&args) == 0) {
gl::mainthread=pthread_self();
sigset_t set;
sigemptyset(&set);
sigaddset(&set, SIGCHLD);
pthread_sigmask(SIG_BLOCK, &set, NULL);
while(true) {
Signal(SIGUSR2,exitHandler);
camp::glrenderWrapper();
gl::initialize=true;
}
} else gl::glthread=false;
} catch(std::bad_alloc&) {
outOfMemory();
}
}
#endif
gl::glthread=false;
#endif
asymain(&args);
}
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