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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:17:27 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:17:27 +0000
commitf215e02bf85f68d3a6106c2a1f4f7f063f819064 (patch)
tree6bb5b92c046312c4e95ac2620b10ddf482d3fa8b /src/VBox/Runtime/r0drv/netbsd/semevent-r0drv-netbsd.c
parentInitial commit. (diff)
downloadvirtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.tar.xz
virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.zip
Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/VBox/Runtime/r0drv/netbsd/semevent-r0drv-netbsd.c')
-rw-r--r--src/VBox/Runtime/r0drv/netbsd/semevent-r0drv-netbsd.c294
1 files changed, 294 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r0drv/netbsd/semevent-r0drv-netbsd.c b/src/VBox/Runtime/r0drv/netbsd/semevent-r0drv-netbsd.c
new file mode 100644
index 00000000..2c0a6e58
--- /dev/null
+++ b/src/VBox/Runtime/r0drv/netbsd/semevent-r0drv-netbsd.c
@@ -0,0 +1,294 @@
+/* $Id: semevent-r0drv-netbsd.c $ */
+/** @file
+ * IPRT - Single Release Event Semaphores, Ring-0 Driver, NetBSD.
+ */
+
+/*
+ * Contributed by knut st. osmundsen.
+ *
+ * Copyright (C) 2007-2023 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
+ * --------------------------------------------------------------------
+ *
+ * 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 *
+*********************************************************************************************************************************/
+#define RTSEMEVENT_WITHOUT_REMAPPING
+#include "the-netbsd-kernel.h"
+#include "internal/iprt.h"
+#include <iprt/semaphore.h>
+
+#include <iprt/asm.h>
+#include <iprt/assert.h>
+#include <iprt/err.h>
+#include <iprt/lockvalidator.h>
+#include <iprt/mem.h>
+
+#include "sleepqueue-r0drv-netbsd.h"
+#include "internal/magics.h"
+
+
+/*********************************************************************************************************************************
+* Structures and Typedefs *
+*********************************************************************************************************************************/
+/**
+ * NetBSD event semaphore.
+ */
+typedef struct RTSEMEVENTINTERNAL
+{
+ /** Magic value (RTSEMEVENT_MAGIC). */
+ uint32_t volatile u32Magic;
+ /** The object status - !0 when signaled and 0 when reset. */
+ uint32_t volatile fState;
+ /** Reference counter. */
+ uint32_t volatile cRefs;
+} RTSEMEVENTINTERNAL, *PRTSEMEVENTINTERNAL;
+
+
+RTDECL(int) RTSemEventCreate(PRTSEMEVENT phEventSem)
+{
+ return RTSemEventCreateEx(phEventSem, 0 /*fFlags*/, NIL_RTLOCKVALCLASS, NULL);
+}
+
+
+RTDECL(int) RTSemEventCreateEx(PRTSEMEVENT phEventSem, uint32_t fFlags, RTLOCKVALCLASS hClass, const char *pszNameFmt, ...)
+{
+ AssertCompile(sizeof(RTSEMEVENTINTERNAL) > sizeof(void *));
+ AssertReturn(!(fFlags & ~(RTSEMEVENT_FLAGS_NO_LOCK_VAL | RTSEMEVENT_FLAGS_BOOTSTRAP_HACK)), VERR_INVALID_PARAMETER);
+ Assert(!(fFlags & RTSEMEVENT_FLAGS_BOOTSTRAP_HACK) || (fFlags & RTSEMEVENT_FLAGS_NO_LOCK_VAL));
+ AssertPtrReturn(phEventSem, VERR_INVALID_POINTER);
+
+ PRTSEMEVENTINTERNAL pThis = (PRTSEMEVENTINTERNAL)RTMemAllocZ(sizeof(*pThis));
+ if (!pThis)
+ return VERR_NO_MEMORY;
+
+ pThis->u32Magic = RTSEMEVENT_MAGIC;
+ pThis->cRefs = 1;
+ pThis->fState = 0;
+
+ *phEventSem = pThis;
+ return VINF_SUCCESS;
+}
+
+
+/**
+ * Retains a reference to the event semaphore.
+ *
+ * @param pThis The event semaphore.
+ */
+DECLINLINE(void) rtR0SemEventBsdRetain(PRTSEMEVENTINTERNAL pThis)
+{
+ uint32_t cRefs = ASMAtomicIncU32(&pThis->cRefs);
+ Assert(cRefs < 100000); NOREF(cRefs);
+}
+
+
+/**
+ * Releases a reference to the event semaphore.
+ *
+ * @param pThis The event semaphore.
+ */
+DECLINLINE(void) rtR0SemEventBsdRelease(PRTSEMEVENTINTERNAL pThis)
+{
+ if (RT_UNLIKELY(ASMAtomicDecU32(&pThis->cRefs) == 0))
+ RTMemFree(pThis);
+}
+
+
+RTDECL(int) RTSemEventDestroy(RTSEMEVENT hEventSem)
+{
+ /*
+ * Validate input.
+ */
+ PRTSEMEVENTINTERNAL pThis = hEventSem;
+ if (pThis == NIL_RTSEMEVENT)
+ return VINF_SUCCESS;
+ AssertMsgReturn(pThis->u32Magic == RTSEMEVENT_MAGIC, ("pThis->u32Magic=%RX32 pThis=%p\n", pThis->u32Magic, pThis), VERR_INVALID_HANDLE);
+ Assert(pThis->cRefs > 0);
+
+ /*
+ * Invalidate it and signal the object just in case.
+ */
+ ASMAtomicWriteU32(&pThis->u32Magic, ~RTSEMEVENT_MAGIC);
+ ASMAtomicWriteU32(&pThis->fState, 0);
+ rtR0SemBsdBroadcast(pThis);
+ rtR0SemEventBsdRelease(pThis);
+ return VINF_SUCCESS;
+}
+
+
+RTDECL(int) RTSemEventSignal(RTSEMEVENT hEventSem)
+{
+ /*
+ * Validate input.
+ */
+ PRTSEMEVENTINTERNAL pThis = (PRTSEMEVENTINTERNAL)hEventSem;
+ AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
+ AssertMsgReturn(pThis->u32Magic == RTSEMEVENT_MAGIC, ("pThis->u32Magic=%RX32 pThis=%p\n", pThis->u32Magic, pThis), VERR_INVALID_HANDLE);
+ rtR0SemEventBsdRetain(pThis);
+
+ /*
+ * Signal the event object.
+ */
+ ASMAtomicWriteU32(&pThis->fState, 1);
+ rtR0SemBsdSignal(pThis);
+ rtR0SemEventBsdRelease(pThis);
+ return VINF_SUCCESS;
+}
+
+/**
+ * Worker for RTSemEventWaitEx and RTSemEventWaitExDebug.
+ *
+ * @returns VBox status code.
+ * @param pThis The event semaphore.
+ * @param fFlags See RTSemEventWaitEx.
+ * @param uTimeout See RTSemEventWaitEx.
+ * @param pSrcPos The source code position of the wait.
+ */
+static int rtR0SemEventWait(PRTSEMEVENTINTERNAL pThis, uint32_t fFlags, uint64_t uTimeout,
+ PCRTLOCKVALSRCPOS pSrcPos)
+{
+ int rc;
+
+ /*
+ * Validate the input.
+ */
+ AssertPtrReturn(pThis, VERR_INVALID_PARAMETER);
+ AssertMsgReturn(pThis->u32Magic == RTSEMEVENT_MAGIC, ("%p u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_PARAMETER);
+ AssertReturn(RTSEMWAIT_FLAGS_ARE_VALID(fFlags), VERR_INVALID_PARAMETER);
+ rtR0SemEventBsdRetain(pThis);
+
+ /*
+ * Try grab the event without setting up the wait.
+ */
+ if (ASMAtomicCmpXchgU32(&pThis->fState, 0, 1))
+ rc = VINF_SUCCESS;
+ else
+ {
+ /*
+ * We have to wait.
+ */
+ RTR0SEMBSDSLEEP Wait;
+ rc = rtR0SemBsdWaitInit(&Wait, fFlags, uTimeout, pThis);
+ if (RT_SUCCESS(rc))
+ {
+ for (;;)
+ {
+ /* The destruction test. */
+ if (RT_UNLIKELY(pThis->u32Magic != RTSEMEVENT_MAGIC))
+ rc = VERR_SEM_DESTROYED;
+ else
+ {
+ rtR0SemBsdWaitPrepare(&Wait);
+
+ /* Check the exit conditions. */
+ if (RT_UNLIKELY(pThis->u32Magic != RTSEMEVENT_MAGIC))
+ rc = VERR_SEM_DESTROYED;
+ else if (ASMAtomicCmpXchgU32(&pThis->fState, 0, 1))
+ rc = VINF_SUCCESS;
+ else if (rtR0SemBsdWaitHasTimedOut(&Wait))
+ rc = VERR_TIMEOUT;
+ else if (rtR0SemBsdWaitWasInterrupted(&Wait))
+ rc = VERR_INTERRUPTED;
+ else
+ {
+ /* Do the wait and then recheck the conditions. */
+ rtR0SemBsdWaitDoIt(&Wait);
+ continue;
+ }
+ }
+ break;
+ }
+
+ rtR0SemBsdWaitDelete(&Wait);
+ }
+ }
+
+ rtR0SemEventBsdRelease(pThis);
+ return rc;
+}
+
+
+RTDECL(int) RTSemEventWaitEx(RTSEMEVENT hEventSem, uint32_t fFlags, uint64_t uTimeout)
+{
+#ifndef RTSEMEVENT_STRICT
+ return rtR0SemEventWait(hEventSem, fFlags, uTimeout, NULL);
+#else
+ RTLOCKVALSRCPOS SrcPos = RTLOCKVALSRCPOS_INIT_NORMAL_API();
+ return rtR0SemEventWait(hEventSem, fFlags, uTimeout, &SrcPos);
+#endif
+}
+RT_EXPORT_SYMBOL(RTSemEventWaitEx);
+
+
+RTDECL(int) RTSemEventWaitExDebug(RTSEMEVENT hEventSem, uint32_t fFlags, uint64_t uTimeout,
+ RTHCUINTPTR uId, RT_SRC_POS_DECL)
+{
+ RTLOCKVALSRCPOS SrcPos = RTLOCKVALSRCPOS_INIT_DEBUG_API();
+ return rtR0SemEventWait(hEventSem, fFlags, uTimeout, &SrcPos);
+}
+RT_EXPORT_SYMBOL(RTSemEventWaitExDebug);
+
+
+RTDECL(uint32_t) RTSemEventGetResolution(void)
+{
+ return 1000000000 / hz;
+}
+
+RTR0DECL(bool) RTSemEventIsSignalSafe(void)
+{
+ /** @todo check the code... */
+ return false;
+}
+