1 files changed, 135 insertions, 0 deletions
diff --git a/src/VBox/Runtime/testcase/tstRTCircBuf.cpp b/src/VBox/Runtime/testcase/tstRTCircBuf.cpp
new file mode 100644
index 00000000..2807aeca
--- /dev/null
+++ b/src/VBox/Runtime/testcase/tstRTCircBuf.cpp
@@ -0,0 +1,135 @@
+/* $Id: tstRTCircBuf.cpp $ */
+/** @file
+ * IPRT Testcase - Lock free circular buffers.
+ */
+
+/*
+ * Copyright (C) 2010-2020 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/circbuf.h>
+
+#include <iprt/errcore.h>
+#include <iprt/string.h>
+#include <iprt/test.h>
+
+
+/**
+ * Basic API checks.
+ */
+static void tst1(void)
+{
+    void *pvBuf;
+    size_t cbSize;
+
+    char achTestPattern1[] = { 0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9 };
+//    char achTestPattern2[] = { 0x8, 0x9, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9 };
+//    char achTestPattern3[] = { 0x5, 0x6, 0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7 };
+
+    /* Create */
+    RTTestISub("Creation");
+    PRTCIRCBUF pBuf;
+    RTTESTI_CHECK_RC(RTCircBufCreate(&pBuf, 10), VINF_SUCCESS);
+    RTTESTI_CHECK(RTCircBufFree(pBuf) == 10);
+    RTTESTI_CHECK(RTCircBufUsed(pBuf) == 0);
+
+    /* Full write */
+    RTTestISub("Full write");
+    RTCircBufAcquireWriteBlock(pBuf, 10, &pvBuf, &cbSize);
+    RTTESTI_CHECK(cbSize == 10);
+    memcpy(pvBuf, achTestPattern1, 10);
+    RTCircBufReleaseWriteBlock(pBuf, 10);
+    RTTESTI_CHECK(RTCircBufFree(pBuf) == 0);
+    RTTESTI_CHECK(RTCircBufUsed(pBuf) == 10);
+//    RTTESTI_CHECK(memcmp(pBuf->pvBuf, achTestPattern1, 10) == 0); /* Check the internal state */
+
+    /* Half read */
+    RTTestISub("Half read");
+    RTCircBufAcquireReadBlock(pBuf, 5, &pvBuf, &cbSize);
+    RTTESTI_CHECK(cbSize == 5);
+    RTTESTI_CHECK(memcmp(pvBuf, achTestPattern1, 5) == 0);
+    RTCircBufReleaseReadBlock(pBuf, 5);
+    RTTESTI_CHECK(RTCircBufFree(pBuf) == 5);
+    RTTESTI_CHECK(RTCircBufUsed(pBuf) == 5);
+
+    /* Sub write */
+    RTTestISub("Sub write");
+    RTCircBufAcquireWriteBlock(pBuf, 2, &pvBuf, &cbSize);
+    RTTESTI_CHECK(cbSize == 2);
+    memcpy(pvBuf, &achTestPattern1[8], 2);
+    RTCircBufReleaseWriteBlock(pBuf, 2);
+    RTTESTI_CHECK(RTCircBufFree(pBuf) == 3);
+    RTTESTI_CHECK(RTCircBufUsed(pBuf) == 7);
+//    RTTESTI_CHECK(memcmp(pBuf->pvBuf, achTestPattern2, 10) == 0); /* Check the internal state */
+
+    /* Split tests */
+    /* Split read */
+    RTTestISub("Split read");
+    RTCircBufAcquireReadBlock(pBuf, 7, &pvBuf, &cbSize);
+    RTTESTI_CHECK(cbSize == 5);
+    RTTESTI_CHECK(memcmp(pvBuf, &achTestPattern1[5], 5) == 0);
+    RTCircBufReleaseReadBlock(pBuf, 5);
+    RTTESTI_CHECK(RTCircBufFree(pBuf) == 8);
+    RTTESTI_CHECK(RTCircBufUsed(pBuf) == 2);
+    RTCircBufAcquireReadBlock(pBuf, 2, &pvBuf, &cbSize);
+    RTTESTI_CHECK(cbSize == 2);
+    RTTESTI_CHECK(memcmp(pvBuf, &achTestPattern1[8], 2) == 0);
+    RTCircBufReleaseReadBlock(pBuf, 2);
+    RTTESTI_CHECK(RTCircBufFree(pBuf) == 10);
+    RTTESTI_CHECK(RTCircBufUsed(pBuf) == 0);
+
+    /* Split write */
+    RTTestISub("Split write");
+    RTCircBufAcquireWriteBlock(pBuf, 10, &pvBuf, &cbSize);
+    RTTESTI_CHECK(cbSize == 8);
+    memcpy(pvBuf, achTestPattern1, 8);
+    RTCircBufReleaseWriteBlock(pBuf, 8);
+    RTTESTI_CHECK(RTCircBufFree(pBuf) == 2);
+    RTTESTI_CHECK(RTCircBufUsed(pBuf) == 8);
+    RTCircBufAcquireWriteBlock(pBuf, 2, &pvBuf, &cbSize);
+    RTTESTI_CHECK(cbSize == 2);
+    memcpy(pvBuf, &achTestPattern1[5], 2);
+    RTCircBufReleaseWriteBlock(pBuf, 2);
+    RTTESTI_CHECK(RTCircBufFree(pBuf) == 0);
+    RTTESTI_CHECK(RTCircBufUsed(pBuf) == 10);
+//    RTTESTI_CHECK(memcmp(pBuf->pvBuf, achTestPattern3, 10) == 0); /* Check the internal state */
+
+    /* Destroy */
+    RTCircBufDestroy(pBuf);
+}
+
+
+int main()
+{
+    RTTEST hTest;
+    int rc = RTTestInitAndCreate("tstRTCircBuf", &hTest);
+    if (rc)
+        return rc;
+    RTTestBanner(hTest);
+
+    tst1();
+
+    return RTTestSummaryAndDestroy(hTest);
+}
+