/* -----------------------------------------------------------------------------
- * $Id: Signals.c,v 1.9 1999/11/02 15:06:02 simonmar Exp $
+ * $Id: Signals.c,v 1.18 2000/08/25 13:12:07 simonmar Exp $
*
* (c) The GHC Team, 1998-1999
*
*
* ---------------------------------------------------------------------------*/
+#define NON_POSIX_SOURCE
+
#include "Rts.h"
#include "SchedAPI.h"
#include "Schedule.h"
#ifndef PAR
+/* SUP: The type of handlers is a little bit, well, doubtful... */
static StgInt *handlers = NULL; /* Dynamically grown array of signal handlers */
static StgInt nHandlers = 0; /* Size of handlers array */
if (handlers == NULL) {
/* don't fflush(stdout); WORKAROUND bug in Linux glibc */
- fprintf(stderr, "VM exhausted (in more_handlers)\n");
- exit(EXIT_FAILURE);
+ barf("VM exhausted (in more_handlers)");
}
for(i = nHandlers; i <= sig; i++)
/* Fill in the new slots with default actions */
circumstances, depending on the signal.
*/
- *next_pending_handler++ = deRefStablePtr(handlers[sig]);
+ *next_pending_handler++ = deRefStablePtr(stgCast(StgStablePtr,handlers[sig]));
/* stack full? */
if (next_pending_handler == &pending_handler_buf[N_PENDING_HANDLERS]) {
* by freeing the previous handler if there was one.
*/
if (previous_spi >= 0) {
- freeStablePtr(handlers[sig]);
+ freeStablePtr(stgCast(StgStablePtr,handlers[sig]));
}
return STG_SIG_ERR;
}
next_pending_handler--;
- /* create*Thread puts the thread on the head of the runnable
- * queue, hence it will be run next. Poor man's priority
- * scheduling.
- */
- createIOThread(RtsFlags.GcFlags.initialStkSize,
- (StgClosure *) *next_pending_handler);
+ scheduleThread(
+ createIOThread(RtsFlags.GcFlags.initialStkSize,
+ (StgClosure *) *next_pending_handler));
}
unblockUserSignals();
sig_install(StgInt sig, StgInt spi, StgStablePtr handler, sigset_t *mask)
{
/* don't fflush(stdout); WORKAROUND bug in Linux glibc */
- fprintf(stderr,
- "No signal handling support in a parallel implementation.\n");
- exit(EXIT_FAILURE);
+ barf("no signal handling support in a parallel implementation");
}
void
#endif
static void
-shutdown_handler(int sig)
+shutdown_handler(int sig STG_UNUSED)
{
#ifdef SMP
/* if I'm a worker thread, send this signal to the guy who
} else
#endif
- shutdownHaskellAndExit(EXIT_FAILURE);
+ /* If we're already trying to interrupt the RTS, terminate with
+ * extreme prejudice. So the first ^C tries to exit the program
+ * cleanly, and the second one just kills it.
+ */
+ if (interrupted) {
+ exit(EXIT_INTERRUPTED);
+ } else {
+ interruptStgRts();
+ }
}
/*
* when they de-install.
*/
void
-init_shutdown_handler()
+init_default_handlers()
{
struct sigaction action,oact;
action.sa_flags = 0;
if (sigaction(SIGINT, &action, &oact) != 0) {
/* Oh well, at least we tried. */
-#ifdef DEBUG
- fprintf(stderr, "init_shutdown_handler: failed to reg SIGINT handler");
-#endif
+ prog_belch("failed to install SIGINT handler");
}
-}
-
-
+ siginterrupt(SIGINT, 1);
+}
#endif /*! mingw32_TARGET_OS */