/* -----------------------------------------------------------------------------
- * $Id: Itimer.c,v 1.10 2000/03/14 01:43:27 sof Exp $
+ * $Id: Itimer.c,v 1.16 2000/08/03 11:28:35 simonmar Exp $
*
* (c) The GHC Team, 1995-1999
*
#endif
#include "Rts.h"
+#include "RtsFlags.h"
#include "Itimer.h"
+#include "Proftimer.h"
#include "Schedule.h"
/* As recommended in the autoconf manual */
#endif
lnat total_ticks = 0;
-rtsBool do_prof_ticks = rtsFalse;
+
+/* ticks left before next pre-emptive context switch */
+int ticks_to_ctxt_switch = 0;
static
void
total_ticks++;
#ifdef PROFILING
- if (do_prof_ticks == rtsTrue) {
- CCS_TICK(CCCS);
- }
+ handleProfTick();
#endif
/* For threadDelay etc., see Select.c */
ticks_since_select++;
+
+ ticks_to_ctxt_switch--;
+ if (ticks_to_ctxt_switch <= 0) {
+ ticks_to_ctxt_switch = RtsFlags.ConcFlags.ctxtSwitchTicks;
+ context_switch = 1; /* schedule a context switch */
+ }
}
#if defined(mingw32_TARGET_OS) || (defined(cygwin32_TARGET_OS) && !defined(HAVE_SETITIMER))
-/*
- * Sigh - to avoid requiring anyone that wants to build ghc to have
- * to augment the Win32 header files that comes with cygwinb20.1,
- * include the missing MM API decls here inline.
- *
- * ToDo: check and remove these once the next version of cygwin is
- * released.
- */
-#define TIMERR_NOERROR 0
-#define TIMERR_NOCANDO 97
-#define TIME_PERIODIC 1
-
-typedef UINT MMRESULT;
-typedef void CALLBACK (*TIMECALLBACK) (UINT, UINT, DWORD, DWORD, DWORD);
-typedef TIMECALLBACK *LPTIMECALLBACK;
-MMRESULT STDCALL timeSetEvent(UINT, UINT, LPTIMECALLBACK, DWORD, UINT);
/*
vtalrm_handler is assigned and set up in Signals.c
0,
TIME_PERIODIC);
# endif
+
return 0;
}
initialize_virtual_timer(nat ms)
{
# ifndef HAVE_SETITIMER
- fprintf(stderr, "No virtual timer on this system\n");
+ /* fprintf(stderr, "No virtual timer on this system\n"); */
return -1;
# else
struct itimerval it;
(void) sigprocmask(SIG_UNBLOCK, &signals, NULL);
}
#endif
+
+#if !defined(HAVE_SETITIMER) && !defined(mingw32_TARGET_OS)
+unsigned int
+getourtimeofday(void)
+{
+ struct timeval tv;
+ gettimeofday(&tv, (struct timezone *) NULL);
+ return (tv.tv_sec * 1000000 + tv.tv_usec);
+}
+#endif