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-rw-r--r--nsprpub/pr/src/misc/prinrval.c118
1 files changed, 118 insertions, 0 deletions
diff --git a/nsprpub/pr/src/misc/prinrval.c b/nsprpub/pr/src/misc/prinrval.c
new file mode 100644
index 000000000..50a938b52
--- /dev/null
+++ b/nsprpub/pr/src/misc/prinrval.c
@@ -0,0 +1,118 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * file: prinrval.c
+ * description: implementation for the kernel interval timing functions
+ */
+
+#include "primpl.h"
+
+/*
+ *-----------------------------------------------------------------------
+ *
+ * _PR_InitClock --
+ *
+ *
+ *-----------------------------------------------------------------------
+ */
+
+void _PR_InitClock(void)
+{
+ _PR_MD_INTERVAL_INIT();
+#ifdef DEBUG
+ {
+ PRIntervalTime ticksPerSec = PR_TicksPerSecond();
+
+ PR_ASSERT(ticksPerSec >= PR_INTERVAL_MIN);
+ PR_ASSERT(ticksPerSec <= PR_INTERVAL_MAX);
+ }
+#endif /* DEBUG */
+}
+
+PR_IMPLEMENT(PRIntervalTime) PR_IntervalNow(void)
+{
+ if (!_pr_initialized) _PR_ImplicitInitialization();
+ return _PR_MD_GET_INTERVAL();
+} /* PR_IntervalNow */
+
+PR_EXTERN(PRUint32) PR_TicksPerSecond(void)
+{
+ if (!_pr_initialized) _PR_ImplicitInitialization();
+ return _PR_MD_INTERVAL_PER_SEC();
+} /* PR_TicksPerSecond */
+
+PR_IMPLEMENT(PRIntervalTime) PR_SecondsToInterval(PRUint32 seconds)
+{
+ return seconds * PR_TicksPerSecond();
+} /* PR_SecondsToInterval */
+
+PR_IMPLEMENT(PRIntervalTime) PR_MillisecondsToInterval(PRUint32 milli)
+{
+ PRIntervalTime ticks;
+ PRUint64 tock, tps, msecPerSec, rounding;
+ LL_UI2L(tock, milli);
+ LL_I2L(msecPerSec, PR_MSEC_PER_SEC);
+ LL_I2L(rounding, (PR_MSEC_PER_SEC >> 1));
+ LL_I2L(tps, PR_TicksPerSecond());
+ LL_MUL(tock, tock, tps);
+ LL_ADD(tock, tock, rounding);
+ LL_DIV(tock, tock, msecPerSec);
+ LL_L2UI(ticks, tock);
+ return ticks;
+} /* PR_MillisecondsToInterval */
+
+PR_IMPLEMENT(PRIntervalTime) PR_MicrosecondsToInterval(PRUint32 micro)
+{
+ PRIntervalTime ticks;
+ PRUint64 tock, tps, usecPerSec, rounding;
+ LL_UI2L(tock, micro);
+ LL_I2L(usecPerSec, PR_USEC_PER_SEC);
+ LL_I2L(rounding, (PR_USEC_PER_SEC >> 1));
+ LL_I2L(tps, PR_TicksPerSecond());
+ LL_MUL(tock, tock, tps);
+ LL_ADD(tock, tock, rounding);
+ LL_DIV(tock, tock, usecPerSec);
+ LL_L2UI(ticks, tock);
+ return ticks;
+} /* PR_MicrosecondsToInterval */
+
+PR_IMPLEMENT(PRUint32) PR_IntervalToSeconds(PRIntervalTime ticks)
+{
+ return ticks / PR_TicksPerSecond();
+} /* PR_IntervalToSeconds */
+
+PR_IMPLEMENT(PRUint32) PR_IntervalToMilliseconds(PRIntervalTime ticks)
+{
+ PRUint32 milli;
+ PRUint64 tock, tps, msecPerSec, rounding;
+ LL_UI2L(tock, ticks);
+ LL_I2L(msecPerSec, PR_MSEC_PER_SEC);
+ LL_I2L(tps, PR_TicksPerSecond());
+ LL_USHR(rounding, tps, 1);
+ LL_MUL(tock, tock, msecPerSec);
+ LL_ADD(tock, tock, rounding);
+ LL_DIV(tock, tock, tps);
+ LL_L2UI(milli, tock);
+ return milli;
+} /* PR_IntervalToMilliseconds */
+
+PR_IMPLEMENT(PRUint32) PR_IntervalToMicroseconds(PRIntervalTime ticks)
+{
+ PRUint32 micro;
+ PRUint64 tock, tps, usecPerSec, rounding;
+ LL_UI2L(tock, ticks);
+ LL_I2L(usecPerSec, PR_USEC_PER_SEC);
+ LL_I2L(tps, PR_TicksPerSecond());
+ LL_USHR(rounding, tps, 1);
+ LL_MUL(tock, tock, usecPerSec);
+ LL_ADD(tock, tock, rounding);
+ LL_DIV(tock, tock, tps);
+ LL_L2UI(micro, tock);
+ return micro;
+} /* PR_IntervalToMicroseconds */
+
+/* prinrval.c */
+