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-rw-r--r--src/VBox/Runtime/r0drv/freebsd/semmutex-r0drv-freebsd.c229
1 files changed, 229 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r0drv/freebsd/semmutex-r0drv-freebsd.c b/src/VBox/Runtime/r0drv/freebsd/semmutex-r0drv-freebsd.c
new file mode 100644
index 00000000..de402891
--- /dev/null
+++ b/src/VBox/Runtime/r0drv/freebsd/semmutex-r0drv-freebsd.c
@@ -0,0 +1,229 @@
+/* $Id: semmutex-r0drv-freebsd.c $ */
+/** @file
+ * IPRT - Mutex Semaphores, Ring-0 Driver, FreeBSD.
+ */
+
+/*
+ * Copyright (C) 2010-2022 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 RTSEMMUTEX_WITHOUT_REMAPPING
+#include "the-freebsd-kernel.h"
+#include "internal/iprt.h"
+#include <iprt/semaphore.h>
+
+#include <iprt/asm.h>
+#include <iprt/assert.h>
+#include <iprt/errcore.h>
+#include <iprt/mem.h>
+#include <iprt/thread.h>
+#include <iprt/time.h>
+
+#include "internal/magics.h"
+
+
+/*********************************************************************************************************************************
+* Structures and Typedefs *
+*********************************************************************************************************************************/
+/**
+ * Wrapper for the FreeBSD (sleep) mutex.
+ */
+typedef struct RTSEMMUTEXINTERNAL
+{
+ /** Magic value (RTSEMMUTEX_MAGIC). */
+ uint32_t u32Magic;
+ /** The FreeBSD shared/exclusive lock mutex. */
+ struct sx SxLock;
+} RTSEMMUTEXINTERNAL, *PRTSEMMUTEXINTERNAL;
+
+
+RTDECL(int) RTSemMutexCreate(PRTSEMMUTEX phMutexSem)
+{
+ AssertCompile(sizeof(RTSEMMUTEXINTERNAL) > sizeof(void *));
+ AssertPtrReturn(phMutexSem, VERR_INVALID_POINTER);
+
+ PRTSEMMUTEXINTERNAL pThis = (PRTSEMMUTEXINTERNAL)RTMemAllocZ(sizeof(*pThis));
+ if (pThis)
+ {
+ pThis->u32Magic = RTSEMMUTEX_MAGIC;
+ sx_init_flags(&pThis->SxLock, "IPRT Mutex Semaphore", SX_RECURSE);
+
+ *phMutexSem = pThis;
+ return VINF_SUCCESS;
+ }
+ return VERR_NO_MEMORY;
+}
+
+
+RTDECL(int) RTSemMutexDestroy(RTSEMMUTEX hMutexSem)
+{
+ PRTSEMMUTEXINTERNAL pThis = hMutexSem;
+ if (pThis == NIL_RTSEMMUTEX)
+ return VINF_SUCCESS;
+ AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
+ AssertMsgReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
+
+ AssertReturn(ASMAtomicCmpXchgU32(&pThis->u32Magic, RTSEMMUTEX_MAGIC_DEAD, RTSEMMUTEX_MAGIC), VERR_INVALID_HANDLE);
+
+ sx_destroy(&pThis->SxLock);
+ RTMemFree(pThis);
+
+ return VINF_SUCCESS;
+}
+
+
+RTDECL(int) RTSemMutexRequest(RTSEMMUTEX hMutexSem, RTMSINTERVAL cMillies)
+{
+ PRTSEMMUTEXINTERNAL pThis = hMutexSem;
+ int rc;
+ AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
+ AssertMsgReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
+
+ if (cMillies == RT_INDEFINITE_WAIT)
+ {
+ sx_xlock(&pThis->SxLock);
+ rc = VINF_SUCCESS;
+ }
+ else if (!cMillies)
+ {
+ if (sx_try_xlock(&pThis->SxLock))
+ rc = VINF_SUCCESS;
+ else
+ rc = VERR_TIMEOUT;
+ }
+ /*
+ * GROSS HACK: poll implementation of timeout.
+ */
+ /** @todo Implement timeouts in RTSemMutexRequest. */
+ else if (sx_try_xlock(&pThis->SxLock))
+ rc = VINF_SUCCESS;
+ else
+ {
+ uint64_t StartTS = RTTimeSystemMilliTS();
+ rc = VERR_TIMEOUT;
+ do
+ {
+ RTThreadSleep(1);
+ if (sx_try_xlock(&pThis->SxLock))
+ {
+ rc = VINF_SUCCESS;
+ break;
+ }
+ } while (RTTimeSystemMilliTS() - StartTS < cMillies);
+ }
+
+ return VINF_SUCCESS;
+}
+
+
+RTDECL(int) RTSemMutexRequestDebug(RTSEMMUTEX hMutexSem, RTMSINTERVAL cMillies, RTHCUINTPTR uId, RT_SRC_POS_DECL)
+{
+ return RTSemMutexRequest(hMutexSem, cMillies);
+}
+
+
+RTDECL(int) RTSemMutexRequestNoResume(RTSEMMUTEX hMutexSem, RTMSINTERVAL cMillies)
+{
+ PRTSEMMUTEXINTERNAL pThis = hMutexSem;
+ int rc;
+ AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
+ AssertMsgReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
+
+ if (cMillies == RT_INDEFINITE_WAIT)
+ {
+ if (!sx_xlock_sig(&pThis->SxLock))
+ rc = VINF_SUCCESS;
+ else
+ rc = VERR_INTERRUPTED;
+ }
+ else if (!cMillies)
+ {
+ if (sx_try_xlock(&pThis->SxLock))
+ rc = VINF_SUCCESS;
+ else
+ rc = VERR_TIMEOUT;
+ }
+ /*
+ * GROSS HACK: poll implementation of timeout.
+ */
+ /** @todo Implement timeouts and interrupt checks in
+ * RTSemMutexRequestNoResume. */
+ else if (sx_try_xlock(&pThis->SxLock))
+ rc = VINF_SUCCESS;
+ else
+ {
+ uint64_t StartTS = RTTimeSystemMilliTS();
+ rc = VERR_TIMEOUT;
+ do
+ {
+ RTThreadSleep(1);
+ if (sx_try_xlock(&pThis->SxLock))
+ {
+ rc = VINF_SUCCESS;
+ break;
+ }
+ } while (RTTimeSystemMilliTS() - StartTS < cMillies);
+ }
+
+ return VINF_SUCCESS;
+}
+
+
+RTDECL(int) RTSemMutexRequestNoResumeDebug(RTSEMMUTEX hMutexSem, RTMSINTERVAL cMillies, RTHCUINTPTR uId, RT_SRC_POS_DECL)
+{
+ return RTSemMutexRequestNoResume(hMutexSem, cMillies);
+}
+
+
+RTDECL(int) RTSemMutexRelease(RTSEMMUTEX hMutexSem)
+{
+ PRTSEMMUTEXINTERNAL pThis = hMutexSem;
+ AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
+ AssertMsgReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
+
+ sx_xunlock(&pThis->SxLock);
+ return VINF_SUCCESS;
+}
+
+
+
+RTDECL(bool) RTSemMutexIsOwned(RTSEMMUTEX hMutexSem)
+{
+ PRTSEMMUTEXINTERNAL pThis = hMutexSem;
+ AssertPtrReturn(pThis, false);
+ AssertMsgReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), false);
+
+ return sx_xlocked(&pThis->SxLock);
+}
+