[project @ 2000-11-14 10:56:08 by simonmar]

[ghc-hetmet.git] / ghc / rts / Itimer.c

diff --git a/ghc/rts/Itimer.c b/ghc/rts/Itimer.c
index 07d6dcd..6238391 100644 (file)
--- a/ghc/rts/Itimer.c
+++ b/ghc/rts/Itimer.c
@@ -1,5 +1,5 @@
 /* -----------------------------------------------------------------------------
- * $Id: Itimer.c,v 1.17 2000/08/25 13:12:07 simonmar Exp $
+ * $Id: Itimer.c,v 1.19 2000/10/06 11:05:57 rrt Exp $
  *
  * (c) The GHC Team, 1995-1999
  *
@@ -53,14 +53,16 @@ static
 void
 #if defined(mingw32_TARGET_OS) || (defined(cygwin32_TARGET_OS) && !defined(HAVE_SETITIMER))
 CALLBACK
-#endif
+handle_tick(UINT uID STG_UNUSED, UINT uMsg STG_UNUSED, DWORD dwUser STG_UNUSED,
+           DWORD dw1 STG_UNUSED, DWORD d STG_UNUSED);
+#else
 handle_tick(int unused STG_UNUSED);
+#endif
 
 /* -----------------------------------------------------------------------------
    Tick handler
 
-   We use the ticker for two things: supporting threadDelay, and time
-   profiling.
+   We use the ticker for time profiling.
 
    SMP note: this signal could be delivered to *any* thread.  We have
    to ensure that it doesn't matter which thread actually runs the
@@ -71,8 +73,11 @@ static
 void
 #if defined(mingw32_TARGET_OS) || (defined(cygwin32_TARGET_OS) && !defined(HAVE_SETITIMER))
 CALLBACK
-#endif
+handle_tick(UINT uID STG_UNUSED, UINT uMsg STG_UNUSED, DWORD dwUser STG_UNUSED,
+           DWORD dw1 STG_UNUSED, DWORD d STG_UNUSED)
+#else
 handle_tick(int unused STG_UNUSED)
+#endif
 {
   total_ticks++;
 
@@ -106,16 +111,8 @@ handle_tick(int unused STG_UNUSED)
 
 #if defined(mingw32_TARGET_OS) || (defined(cygwin32_TARGET_OS) && !defined(HAVE_SETITIMER))
 
-/*
-  vtalrm_handler is assigned and set up in Signals.c
-
-  vtalrm_id (defined in Signals.c) holds
-  the system id for the current timer (used to 
-  later block/kill it.)
-*/
-extern nat vtalrm_id;
-TIMECALLBACK *vtalrm_cback;
- 
+LPTIMECALLBACK vtalrm_cback;
+
 nat
 initialize_virtual_timer(nat ms)
 {
@@ -126,22 +123,26 @@ initialize_virtual_timer(nat ms)
      
      As the delivery of ticks isn't free, we only
      enable it if we really needed, i.e., when profiling.
-     (the RTS now also needs timer ticks to implement
-     threadDelay in non-profiling mode, but the pure
-     Win32 port doesn't support that.....yet.)
+     (GetTickCount is used for threadDelay)
   */
-  unsigned int delay,vtalrm_id;
+  unsigned int delay;
+  static unsigned int vtalrm_id;
  
-  delay = timeBeginPeriod(1);
-  if (delay == TIMERR_NOCANDO) { /* error of some sort. */
-     return delay;
+  if (ms) {
+    delay = timeBeginPeriod(1);
+    if (delay == TIMERR_NOCANDO) { /* error of some sort. */
+      return delay;
+    }
+    vtalrm_id =
+      timeSetEvent(ms,      /* event every `delay' milliseconds. */
+                  1,       /* precision is within 1 ms */
+                  vtalrm_cback,
+                  TIME_CALLBACK_FUNCTION,     /* ordinary callback */
+                  TIME_PERIODIC);
+  } else {
+    timeKillEvent(vtalrm_id);
+    timeEndPeriod(1);
   }
-  vtalrm_id =
-    timeSetEvent(ms,     /* event every `delay' milliseconds. */
-               1,       /* precision is within 5 millisecs. */
-               (LPTIMECALLBACK)vtalrm_cback,
-               0,
-               TIME_PERIODIC);
 # endif
 
   return 0;
@@ -243,6 +244,7 @@ unblock_vtalrm_signal(void)
 /* gettimeofday() takes around 1us on our 500MHz PIII.  Since we're
  * only calling it 50 times/s, it shouldn't have any great impact.
  */
+#if !defined(mingw32_TARGET_OS)
 unsigned int 
 getourtimeofday(void)
 {
@@ -251,3 +253,10 @@ getourtimeofday(void)
   return (tv.tv_sec * TICK_FREQUENCY +
          tv.tv_usec * TICK_FREQUENCY / 1000000);
 }
+#else
+unsigned int
+getourtimeofday(void)
+{
+  return (unsigned int)GetTickCount() * 1000;
+}
+#endif