1 files changed, 125 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r3/darwin/time-darwin.cpp b/src/VBox/Runtime/r3/darwin/time-darwin.cpp
new file mode 100644
index 00000000..d2e9f3cb
--- /dev/null
+++ b/src/VBox/Runtime/r3/darwin/time-darwin.cpp
@@ -0,0 +1,125 @@
+/* $Id: time-darwin.cpp $ */
+/** @file
+ * IPRT - Time, Darwin.
+ */
+
+/*
+ * Copyright (C) 2006-2022 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#define LOG_GROUP RTLOGGROUP_TIME
+#define RTTIME_INCL_TIMEVAL
+#include <mach/mach_time.h>
+#include <mach/kern_return.h>
+#include <sys/time.h>
+#include <time.h>
+
+#include <iprt/time.h>
+#include <iprt/assert.h>
+#include "internal/time.h"
+
+
+/*********************************************************************************************************************************
+*   Global Variables                                                                                                             *
+*********************************************************************************************************************************/
+static struct mach_timebase_info    g_Info = { 0, 0 };
+static double                       g_rdFactor = 0.0;
+static bool                         g_fFailedToGetTimeBaseInfo = false;
+
+
+/**
+ * Perform lazy init (pray we're not racing anyone in a bad way).
+ */
+static void rtTimeDarwinLazyInit(void)
+{
+    struct mach_timebase_info Info;
+    if (mach_timebase_info(&Info) == KERN_SUCCESS)
+    {
+        g_rdFactor = (double)Info.numer / (double)Info.denom;
+        g_Info = Info;
+    }
+    else
+    {
+        g_fFailedToGetTimeBaseInfo = true;
+        Assert(g_Info.denom == 0 && g_Info.numer == 0 && g_rdFactor == 0.0);
+    }
+}
+
+
+/**
+ * Internal worker.
+ * @returns Nanosecond timestamp.
+ */
+DECLINLINE(uint64_t) rtTimeGetSystemNanoTS(void)
+{
+    /* Lazy init. */
+    if (RT_UNLIKELY(g_Info.denom == 0 && !g_fFailedToGetTimeBaseInfo))
+        rtTimeDarwinLazyInit();
+
+    /* special case: absolute time is in nanoseconds */
+    if (g_Info.denom == 1 && g_Info.numer == 1)
+        return mach_absolute_time();
+
+    /* general case: multiply by factor to get nanoseconds. */
+    if (g_rdFactor != 0.0)
+        return mach_absolute_time() * g_rdFactor;
+
+    /* worst case: fallback to gettimeofday(). */
+    struct timeval tv;
+    gettimeofday(&tv, NULL);
+    return (uint64_t)tv.tv_sec  * RT_NS_1SEC_64
+         + (uint64_t)(tv.tv_usec * RT_NS_1US);
+}
+
+
+RTDECL(uint64_t) RTTimeSystemNanoTS(void)
+{
+    return rtTimeGetSystemNanoTS();
+}
+
+
+RTDECL(uint64_t) RTTimeSystemMilliTS(void)
+{
+    return rtTimeGetSystemNanoTS() / RT_NS_1MS;
+}
+
+
+RTDECL(PRTTIMESPEC) RTTimeNow(PRTTIMESPEC pTime)
+{
+    /** @todo find nanosecond API for getting time of day. */
+    struct timeval tv;
+    gettimeofday(&tv, NULL);
+    return RTTimeSpecSetTimeval(pTime, &tv);
+}
+