1 files changed, 176 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/rand/rand.cpp b/src/VBox/Runtime/common/rand/rand.cpp
new file mode 100644
index 00000000..ef16b3a3
--- /dev/null
+++ b/src/VBox/Runtime/common/rand/rand.cpp
@@ -0,0 +1,176 @@
+/* $Id: rand.cpp $ */
+/** @file
+ * IPRT - Random Numbers.
+ */
+
+/*
+ * Copyright (C) 2006-2020 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 <iprt/rand.h>
+#include "internal/iprt.h"
+
+#include <iprt/time.h>
+#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
+# include <iprt/asm-amd64-x86.h>
+#endif
+#include <iprt/errcore.h>
+#include <iprt/assert.h>
+#include <iprt/thread.h>
+#include <iprt/once.h>
+#include "internal/rand.h"
+
+
+/*********************************************************************************************************************************
+*   Global Variables                                                                                                             *
+*********************************************************************************************************************************/
+/** For lazily initializing of the random generator. */
+static RTONCE g_rtRandOnce = RTONCE_INITIALIZER;
+/** The default random generator. */
+static RTRAND g_hRand = NIL_RTRAND;
+
+
+/**
+ * Perform lazy initialization.
+ *
+ * @returns IPRT status code.
+ * @param   pvUser      Ignored.
+ */
+static DECLCALLBACK(int) rtRandInitOnce(void *pvUser)
+{
+    RTRAND hRand;
+    int rc = RTRandAdvCreateSystemFaster(&hRand);
+    if (RT_FAILURE(rc))
+        rc = RTRandAdvCreateParkMiller(&hRand);
+    if (RT_SUCCESS(rc))
+    {
+#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
+        RTRandAdvSeed(hRand, ASMReadTSC() >> 8);
+#else
+        RTRandAdvSeed(hRand, RTTimeNanoTS() >> 8);
+#endif
+        g_hRand = hRand;
+    }
+    else
+        AssertRC(rc);
+
+    NOREF(pvUser);
+    return rc;
+}
+
+
+/**
+ * Termination counterpart to rtRandInitOnce.
+ *
+ * @returns IPRT status code.
+ * @param   pvUser          Ignored.
+ * @param   fLazyCleanUpOk  Set if we're terminating the process.
+ */
+static DECLCALLBACK(void) rtRandTermOnce(void *pvUser, bool fLazyCleanUpOk)
+{
+    if (!fLazyCleanUpOk)
+    {
+        RTRAND hRand = g_hRand;
+        g_hRand = NIL_RTRAND;
+        if (hRand != NIL_RTRAND)
+        {
+            int rc = RTRandAdvDestroy(hRand);
+            AssertRC(rc);
+        }
+    }
+    NOREF(pvUser);
+}
+
+
+RTDECL(void) RTRandBytes(void *pv, size_t cb) RT_NO_THROW_DEF
+{
+    RTOnceEx(&g_rtRandOnce, rtRandInitOnce, rtRandTermOnce, NULL);
+    RTRandAdvBytes(g_hRand, pv, cb);
+}
+RT_EXPORT_SYMBOL(RTRandBytes);
+
+
+RTDECL(uint32_t) RTRandU32Ex(uint32_t u32First, uint32_t u32Last) RT_NO_THROW_DEF
+{
+    RTOnceEx(&g_rtRandOnce, rtRandInitOnce, rtRandTermOnce, NULL);
+    return RTRandAdvU32Ex(g_hRand, u32First, u32Last);
+}
+RT_EXPORT_SYMBOL(RTRandU32Ex);
+
+
+RTDECL(uint32_t) RTRandU32(void) RT_NO_THROW_DEF
+{
+    RTOnceEx(&g_rtRandOnce, rtRandInitOnce, rtRandTermOnce, NULL);
+    return RTRandAdvU32(g_hRand);
+}
+RT_EXPORT_SYMBOL(RTRandU32);
+
+
+RTDECL(int32_t) RTRandS32Ex(int32_t i32First, int32_t i32Last) RT_NO_THROW_DEF
+{
+    RTOnceEx(&g_rtRandOnce, rtRandInitOnce, rtRandTermOnce, NULL);
+    return RTRandAdvS32Ex(g_hRand, i32First, i32Last);
+}
+RT_EXPORT_SYMBOL(RTRandS32Ex);
+
+
+RTDECL(int32_t) RTRandS32(void) RT_NO_THROW_DEF
+{
+    RTOnceEx(&g_rtRandOnce, rtRandInitOnce, rtRandTermOnce, NULL);
+    return RTRandAdvS32(g_hRand);
+}
+RT_EXPORT_SYMBOL(RTRandS32);
+
+
+RTDECL(uint64_t) RTRandU64Ex(uint64_t u64First, uint64_t u64Last) RT_NO_THROW_DEF
+{
+    RTOnceEx(&g_rtRandOnce, rtRandInitOnce, rtRandTermOnce, NULL);
+    return RTRandAdvU64Ex(g_hRand, u64First, u64Last);
+}
+RT_EXPORT_SYMBOL(RTRandU64Ex);
+
+
+RTDECL(uint64_t) RTRandU64(void) RT_NO_THROW_DEF
+{
+    RTOnceEx(&g_rtRandOnce, rtRandInitOnce, rtRandTermOnce, NULL);
+    return RTRandAdvU64(g_hRand);
+}
+RT_EXPORT_SYMBOL(RTRandU64);
+
+
+RTDECL(int64_t) RTRandS64Ex(int64_t i64First, int64_t i64Last) RT_NO_THROW_DEF
+{
+    RTOnceEx(&g_rtRandOnce, rtRandInitOnce, rtRandTermOnce, NULL);
+    return RTRandAdvS64Ex(g_hRand, i64First, i64Last);
+}
+RT_EXPORT_SYMBOL(RTRandS64Ex);
+
+
+RTDECL(int64_t) RTRandS64(void) RT_NO_THROW_DEF
+{
+    RTOnceEx(&g_rtRandOnce, rtRandInitOnce, rtRandTermOnce, NULL);
+    return RTRandAdvS32(g_hRand);
+}
+RT_EXPORT_SYMBOL(RTRandS64);
+