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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 16:49:04 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 16:49:04 +0000
commit16f504a9dca3fe3b70568f67b7d41241ae485288 (patch)
treec60f36ada0496ba928b7161059ba5ab1ab224f9d /include/iprt/spinlock.h
parentInitial commit. (diff)
downloadvirtualbox-16f504a9dca3fe3b70568f67b7d41241ae485288.tar.xz
virtualbox-16f504a9dca3fe3b70568f67b7d41241ae485288.zip
Adding upstream version 7.0.6-dfsg.upstream/7.0.6-dfsgupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'include/iprt/spinlock.h')
-rw-r--r--include/iprt/spinlock.h105
1 files changed, 105 insertions, 0 deletions
diff --git a/include/iprt/spinlock.h b/include/iprt/spinlock.h
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+/** @file
+ * IPRT - Spinlocks.
+ */
+
+/*
+ * Copyright (C) 2006-2022 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
+ */
+
+#ifndef IPRT_INCLUDED_spinlock_h
+#define IPRT_INCLUDED_spinlock_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include <iprt/cdefs.h>
+#include <iprt/types.h>
+
+RT_C_DECLS_BEGIN
+
+
+/** @defgroup grp_rt_spinlock RTSpinlock - Spinlocks
+ * @ingroup grp_rt
+ * @{
+ */
+
+/**
+ * Creates a spinlock.
+ *
+ * @returns iprt status code.
+ * @param pSpinlock Where to store the spinlock handle.
+ * @param fFlags Creation flags, see RTSPINLOCK_FLAGS_XXX.
+ * @param pszName Spinlock name, for debugging purposes. String lifetime
+ * must be the same as the lock as it won't be copied.
+ */
+RTDECL(int) RTSpinlockCreate(PRTSPINLOCK pSpinlock, uint32_t fFlags, const char *pszName);
+
+/** @name RTSPINLOCK_FLAGS_XXX
+ * @{ */
+/** Disable interrupts when taking the spinlock, making it interrupt safe
+ * (sans NMI of course).
+ *
+ * This is generally the safest option, though it isn't really required unless
+ * the data being protect is also accessed from interrupt handler context. */
+#define RTSPINLOCK_FLAGS_INTERRUPT_SAFE RT_BIT(1)
+/** No need to disable interrupts, the protect code/data is not used by
+ * interrupt handlers. */
+#define RTSPINLOCK_FLAGS_INTERRUPT_UNSAFE RT_BIT(2)
+/** @} */
+
+/**
+ * Destroys a spinlock created by RTSpinlockCreate().
+ *
+ * @returns iprt status code.
+ * @param Spinlock Spinlock returned by RTSpinlockCreate().
+ */
+RTDECL(int) RTSpinlockDestroy(RTSPINLOCK Spinlock);
+
+/**
+ * Acquires the spinlock.
+ *
+ * @param Spinlock The spinlock to acquire.
+ */
+RTDECL(void) RTSpinlockAcquire(RTSPINLOCK Spinlock);
+
+/**
+ * Releases the spinlock.
+ *
+ * @param Spinlock The spinlock to acquire.
+ */
+RTDECL(void) RTSpinlockRelease(RTSPINLOCK Spinlock);
+
+
+/** @} */
+
+RT_C_DECLS_END
+
+#endif /* !IPRT_INCLUDED_spinlock_h */
+