Reorganisation of the source tree

[ghc-hetmet.git] / rts / win32 / GetTime.c

diff --git a/rts/win32/GetTime.c b/rts/win32/GetTime.c
new file mode 100644 (file)
index 0000000..584b994
--- /dev/null
+++ b/rts/win32/GetTime.c
@@ -0,0 +1,101 @@
+/* -----------------------------------------------------------------------------
+ *
+ * (c) The GHC Team 2005
+ *
+ * Machine-dependent time measurement functions
+ *
+ * ---------------------------------------------------------------------------*/
+
+#include "Rts.h"
+#include "GetTime.h"
+
+#include <windows.h>
+
+#ifdef HAVE_TIME_H
+# include <time.h>
+#endif
+
+#define HNS_PER_SEC 10000000LL /* FILETIMES are in units of 100ns */
+/* Convert FILETIMEs into secs */
+
+static INLINE_ME Ticks
+fileTimeToTicks(FILETIME ft)
+{
+    Ticks t;
+    t = ((Ticks)ft.dwHighDateTime << 32) | ft.dwLowDateTime;
+    t = (t * TICKS_PER_SECOND) / HNS_PER_SEC;
+    return t;
+}    
+
+static int is_win9x = -1;
+
+static INLINE_ME rtsBool
+isWin9x(void)
+{
+    if (is_win9x < 0) {
+       /* figure out whether we're on a Win9x box or not. */
+       OSVERSIONINFO oi;
+       BOOL b;
+       
+       /* Need to init the size field first.*/
+       oi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
+       b = GetVersionEx(&oi);
+      
+       is_win9x = ( (b && (oi.dwPlatformId & VER_PLATFORM_WIN32_WINDOWS)) ? 1 : 0);
+    }
+    return is_win9x;
+}
+
+
+void
+getProcessTimes(Ticks *user, Ticks *elapsed)
+{
+    *user    = getProcessCPUTime();
+    *elapsed = getProcessElapsedTime();
+}
+
+Ticks
+getProcessCPUTime(void)
+{
+    FILETIME creationTime, exitTime, userTime, kernelTime = {0,0};
+
+    if (isWin9x()) return getProcessElapsedTime();
+
+    if (!GetProcessTimes(GetCurrentProcess(), &creationTime,
+                        &exitTime, &kernelTime, &userTime)) {
+       return 0;
+    }
+
+    return fileTimeToTicks(userTime);
+}
+
+Ticks
+getProcessElapsedTime(void)
+{
+    FILETIME system_time;
+    GetSystemTimeAsFileTime(&system_time);
+    return fileTimeToTicks(system_time);
+}
+
+Ticks
+getThreadCPUTime(void)
+{
+    FILETIME creationTime, exitTime, userTime, kernelTime = {0,0};
+
+    if (isWin9x()) return getProcessCPUTime();
+
+    if (!GetThreadTimes(GetCurrentThread(), &creationTime,
+                       &exitTime, &kernelTime, &userTime)) {
+       return 0;
+    }
+
+    return fileTimeToTicks(userTime);
+}
+
+nat
+getPageFaults(void)
+{
+  /* ToDo (on NT): better, get this via the performance data
+     that's stored in the registry. */
+    return 0;
+}