From f8fe689a81f906d1b91bb3220acde2a4ecb14c5b Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Mon, 6 May 2024 05:01:46 +0200
Subject: Adding upstream version 6.0.4-dfsg.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../r0drv/netbsd/semfastmutex-r0drv-netbsd.c       | 114 +++++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100644 src/VBox/Runtime/r0drv/netbsd/semfastmutex-r0drv-netbsd.c

(limited to 'src/VBox/Runtime/r0drv/netbsd/semfastmutex-r0drv-netbsd.c')

diff --git a/src/VBox/Runtime/r0drv/netbsd/semfastmutex-r0drv-netbsd.c b/src/VBox/Runtime/r0drv/netbsd/semfastmutex-r0drv-netbsd.c
new file mode 100644
index 00000000..8327ae4b
--- /dev/null
+++ b/src/VBox/Runtime/r0drv/netbsd/semfastmutex-r0drv-netbsd.c
@@ -0,0 +1,114 @@
+/* $Id: semfastmutex-r0drv-netbsd.c $ */
+/** @file
+ * IPRT - Fast Mutex Semaphores, Ring-0 Driver, NetBSD.
+ */
+
+/*
+ * Copyright (c) 2007 knut st. osmundsen <bird-src-spam@anduin.net>
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include "the-netbsd-kernel.h"
+
+#include <iprt/semaphore.h>
+#include <iprt/errcore.h>
+#include <iprt/alloc.h>
+#include <iprt/assert.h>
+#include <iprt/asm.h>
+
+#include "internal/magics.h"
+
+
+/*********************************************************************************************************************************
+*   Structures and Typedefs                                                                                                      *
+*********************************************************************************************************************************/
+/**
+ * Wrapper for the NetBSD (sleep) mutex.
+ */
+typedef struct RTSEMFASTMUTEXINTERNAL
+{
+    /** Magic value (RTSEMFASTMUTEX_MAGIC). */
+    uint32_t            u32Magic;
+    /** The NetBSD shared/exclusive lock mutex. */
+    krwlock_t           Mtx;
+} RTSEMFASTMUTEXINTERNAL, *PRTSEMFASTMUTEXINTERNAL;
+
+
+RTDECL(int)  RTSemFastMutexCreate(PRTSEMFASTMUTEX phFastMtx)
+{
+    AssertCompile(sizeof(RTSEMFASTMUTEXINTERNAL) > sizeof(void *));
+    AssertPtrReturn(phFastMtx, VERR_INVALID_POINTER);
+
+    PRTSEMFASTMUTEXINTERNAL pThis = (PRTSEMFASTMUTEXINTERNAL)RTMemAllocZ(sizeof(*pThis));
+    if (pThis)
+    {
+        pThis->u32Magic = RTSEMFASTMUTEX_MAGIC;
+        rw_init(&pThis->Mtx);
+
+        *phFastMtx = pThis;
+        return VINF_SUCCESS;
+    }
+    return VERR_NO_MEMORY;
+}
+
+
+RTDECL(int)  RTSemFastMutexDestroy(RTSEMFASTMUTEX hFastMtx)
+{
+    PRTSEMFASTMUTEXINTERNAL pThis = hFastMtx;
+    if (pThis == NIL_RTSEMFASTMUTEX)
+        return VINF_SUCCESS;
+    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
+    AssertMsgReturn(pThis->u32Magic == RTSEMFASTMUTEX_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
+
+    ASMAtomicWriteU32(&pThis->u32Magic, RTSEMFASTMUTEX_MAGIC_DEAD);
+    rw_destroy(&pThis->Mtx);
+    RTMemFree(pThis);
+
+    return VINF_SUCCESS;
+}
+
+
+RTDECL(int)  RTSemFastMutexRequest(RTSEMFASTMUTEX hFastMtx)
+{
+    PRTSEMFASTMUTEXINTERNAL pThis = hFastMtx;
+    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
+    AssertMsgReturn(pThis->u32Magic == RTSEMFASTMUTEX_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
+
+    rw_enter(&pThis->Mtx, RW_WRITER);
+    return VINF_SUCCESS;
+}
+
+
+RTDECL(int)  RTSemFastMutexRelease(RTSEMFASTMUTEX hFastMtx)
+{
+    PRTSEMFASTMUTEXINTERNAL pThis = hFastMtx;
+    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
+    AssertMsgReturn(pThis->u32Magic == RTSEMFASTMUTEX_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
+
+    rw_exit(&pThis->Mtx);
+    return VINF_SUCCESS;
+}
-- 
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