1 files changed, 94 insertions, 0 deletions
diff --git a/src/VBox/Runtime/os2/rtSemWaitOs2ConvertTimeout.cpp b/src/VBox/Runtime/os2/rtSemWaitOs2ConvertTimeout.cpp
new file mode 100644
index 00000000..7fb9d210
--- /dev/null
+++ b/src/VBox/Runtime/os2/rtSemWaitOs2ConvertTimeout.cpp
@@ -0,0 +1,94 @@
+/* $Id: rtSemWaitOs2ConvertTimeout.cpp $ */
+/** @file
+ * IPRT - RTSemEventMultiWait, implementation based on RTSemEventMultiWaitEx.
+ */
+
+/*
+ * Copyright (C) 2010-2019 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE 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.
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include "internal/iprt.h"
+#include <iprt/semaphore.h>
+#include <iprt/time.h>
+
+
+/*********************************************************************************************************************************
+*   Defined Constants And Macros                                                                                                 *
+*********************************************************************************************************************************/
+/** Too lazy to include the right OS/2 header, duplicating the define we
+ * need here. */
+#define MY_SEM_INDEFINITE_WAIT UINT32_MAX
+
+
+/**
+ * Converts the timeout to a millisecond value that can be fed to KernBlock.
+ *
+ * @returns Relative timeout in milliseconds.
+ * @param   fFlags      The semaphore wait flags.
+ * @param   uTimeout    The timeout value.
+ */
+uint32_t rtR0SemWaitOs2ConvertTimeout(uint32_t fFlags, uint64_t uTimeout)
+{
+    /*
+     * Simple & common cases.
+     */
+    if (fFlags & RTSEMWAIT_FLAGS_INDEFINITE)
+        return MY_SEM_INDEFINITE_WAIT;
+
+    if (   (fFlags & (RTSEMWAIT_FLAGS_MILLISECS | RTSEMWAIT_FLAGS_ABSOLUTE))
+        == RTSEMWAIT_FLAGS_MILLISECS)
+    {
+        if (uTimeout < UINT32_MAX)
+            return (uint32_t)uTimeout;
+        return MY_SEM_INDEFINITE_WAIT;
+    }
+
+    if (!uTimeout)
+        return 0;
+
+    if (uTimeout == UINT64_MAX)
+        return MY_SEM_INDEFINITE_WAIT;
+
+    /*
+     * For the more complicated cases (nano or/and abs), convert thru nano (lazy bird).
+     */
+    if (fFlags & RTSEMWAIT_FLAGS_MILLISECS)
+    {
+        if (uTimeout >= UINT64_MAX / RT_NS_1MS * RT_NS_1MS)
+            return MY_SEM_INDEFINITE_WAIT;
+        uTimeout = uTimeout * RT_NS_1MS;
+    }
+    if (fFlags & RTSEMWAIT_FLAGS_ABSOLUTE)
+    {
+        uint64_t u64Now = RTTimeSystemNanoTS();
+        if (u64Now >= uTimeout)
+            return 0;
+        uTimeout = uTimeout - u64Now;
+    }
+    uTimeout /= RT_NS_1MS;
+    if (uTimeout >= UINT32_MAX)
+        return MY_SEM_INDEFINITE_WAIT;
+    return (uint32_t)uTimeout;
+}
+