From ed2287adcd6b16a0ef34defb443d5c61fc7830d7 Mon Sep 17 00:00:00 2001
From: Christopher Faylor <me@cgf.cx>
Date: Sun, 7 Sep 2003 05:18:01 +0000
Subject: * signal.cc (nanosleep): Improve test for valid values.  Round delay
 up to resolution.  Fix test for negative remainder.  Use timeGetTime through
 gtod. (sleep): Round up return value.  Christopher Faylor <cgf@redhat.com> *
 hires.h (HIRES_DELAY_MAX): Define. (hires_ms::minperiod): Declare static.
 (hires_ms::resolution): New. (hires_ms::dmsecs): New. (hires_ms::prime):
 Return UINT. (gtod): Declare. * times.cc (hires_ms::prime): Always calculate
 minperiod and set it to 1 in case of failure.  Return minperiod.
 (hires_ms::resolution): Define. (hires_ms::~hires_ms): Delete.
 (hires_ms::usecs): Check minperiod to prime. (gtod) Define as global.

---
 winsup/cygwin/times.cc | 47 +++++++++++++++++++++++++++--------------------
 1 file changed, 27 insertions(+), 20 deletions(-)

(limited to 'winsup/cygwin/times.cc')

diff --git a/winsup/cygwin/times.cc b/winsup/cygwin/times.cc
index 0d4bc7112..9eea3352d 100644
--- a/winsup/cygwin/times.cc
+++ b/winsup/cygwin/times.cc
@@ -142,11 +142,13 @@ totimeval (struct timeval *dst, FILETIME *src, int sub, int flag)
   dst->tv_sec = x / (long long) (1e6);
 }
 
+hires_ms gtod;
+UINT NO_COPY hires_ms::minperiod;
+
 /* FIXME: Make thread safe */
 extern "C" int
 gettimeofday (struct timeval *tv, struct timezone *tz)
 {
-  static hires_ms gtod;
   static bool tzflag;
   LONGLONG now = gtod.usecs (false);
   if (now == (LONGLONG) -1)
@@ -620,37 +622,42 @@ hires_us::usecs (bool justdelta)
   return justdelta ? now.QuadPart : primed_ft.QuadPart + now.QuadPart;
 }
 
-void
+UINT
 hires_ms::prime ()
 {
   TIMECAPS tc;
   FILETIME f;
-  int priority = GetThreadPriority (GetCurrentThread ());
-  SetThreadPriority (GetCurrentThread (), THREAD_PRIORITY_TIME_CRITICAL);
 
-  if (timeGetDevCaps (&tc, sizeof (tc)) != TIMERR_NOERROR)
-    minperiod = 0;
-  else
-    {
-      minperiod = min (max (tc.wPeriodMin, 1), tc.wPeriodMax);
-      timeBeginPeriod (minperiod);
-    }
+  if (!minperiod)
+    if (timeGetDevCaps (&tc, sizeof (tc)) != TIMERR_NOERROR)
+      minperiod = 1;
+    else
+      {
+	minperiod = min (max (tc.wPeriodMin, 1), tc.wPeriodMax);
+	timeBeginPeriod (minperiod);
+      }
 
-  initime_ms = timeGetTime ();
-  GetSystemTimeAsFileTime (&f);
-  SetThreadPriority (GetCurrentThread (), priority);
+  if (!inited)
+    {
+      int priority = GetThreadPriority (GetCurrentThread ());
+      SetThreadPriority (GetCurrentThread (), THREAD_PRIORITY_TIME_CRITICAL);
+      initime_ms = timeGetTime ();
+      GetSystemTimeAsFileTime (&f);
+      SetThreadPriority (GetCurrentThread (), priority);
 
-  inited = 1;
-  initime_us.HighPart = f.dwHighDateTime;
-  initime_us.LowPart = f.dwLowDateTime;
-  initime_us.QuadPart -= FACTOR;
-  initime_us.QuadPart /= 10;
+      inited = 1;
+      initime_us.HighPart = f.dwHighDateTime;
+      initime_us.LowPart = f.dwLowDateTime;
+      initime_us.QuadPart -= FACTOR;
+      initime_us.QuadPart /= 10;
+    }
+  return minperiod;
 }
 
 LONGLONG
 hires_ms::usecs (bool justdelta)
 {
-  if (!inited)
+  if (!minperiod) /* NO_COPY variable */
     prime ();
   DWORD now = timeGetTime ();
   // FIXME: Not sure how this will handle the 49.71 day wrap around
-- 
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