9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * IPRT - Single Release Event Semaphores, Ring-0 Driver, Haiku.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * Copyright (C) 2012 Oracle Corporation
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * available from http://www.virtualbox.org. This file is free software;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * you can redistribute it and/or modify it under the terms of the GNU
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * General Public License (GPL) as published by the Free Software
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * The contents of this file may alternatively be used under the terms
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * of the Common Development and Distribution License Version 1.0
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * VirtualBox OSE distribution, in which case the provisions of the
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * CDDL are applicable instead of those of the GPL.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * You may elect to license modified versions of this file under the
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * terms and conditions of either the GPL or the CDDL or both.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync/*******************************************************************************
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync* Header Files *
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync*******************************************************************************/
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync/*******************************************************************************
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync* Structures and Typedefs *
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync*******************************************************************************/
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * Haiku event semaphore.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync /** Magic value (RTSEMEVENT_MAGIC). */
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync /** Reference counter. */
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync /** The semaphore Id. */
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsyncRTDECL(int) RTSemEventCreate(PRTSEMEVENT phEventSem)
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync return RTSemEventCreateEx(phEventSem, 0 /*fFlags*/, NIL_RTLOCKVALCLASS, NULL);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsyncRTDECL(int) RTSemEventCreateEx(PRTSEMEVENT phEventSem, uint32_t fFlags, RTLOCKVALCLASS hClass, const char *pszNameFmt, ...)
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync AssertCompile(sizeof(RTSEMEVENTINTERNAL) > sizeof(void *));
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync AssertReturn(!(fFlags & ~(RTSEMEVENT_FLAGS_NO_LOCK_VAL | RTSEMEVENT_FLAGS_BOOTSTRAP_HACK)), VERR_INVALID_PARAMETER);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync Assert(!(fFlags & RTSEMEVENT_FLAGS_BOOTSTRAP_HACK) || (fFlags & RTSEMEVENT_FLAGS_NO_LOCK_VAL));
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync PRTSEMEVENTINTERNAL pThis = (PRTSEMEVENTINTERNAL)RTMemAllocZ(sizeof(*pThis));
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync pThis->SemId = create_sem(0, "IPRT Semaphore Event");
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync return VERR_TOO_MANY_SEMAPHORES; /** @todo r=ramshankar: use RTErrConvertFromHaikuKernReturn */
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * Retains a reference to the event semaphore.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * @param pThis The event semaphore.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsyncDECLINLINE(void) rtR0SemEventHkuRetain(PRTSEMEVENTINTERNAL pThis)
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * Releases a reference to the event semaphore.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * @param pThis The event semaphore.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsyncDECLINLINE(void) rtR0SemEventHkuRelease(PRTSEMEVENTINTERNAL pThis)
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync if (RT_UNLIKELY(ASMAtomicDecU32(&pThis->cRefs) == 0))
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * Validate input.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync AssertMsgReturn(pThis->u32Magic == RTSEMEVENT_MAGIC, ("pThis->u32Magic=%RX32 pThis=%p\n", pThis->u32Magic, pThis), VERR_INVALID_HANDLE);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * Invalidate it and delete the semaphore to unblock everyone.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync ASMAtomicWriteU32(&pThis->u32Magic, ~RTSEMEVENT_MAGIC);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * Validate input.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync PRTSEMEVENTINTERNAL pThis = (PRTSEMEVENTINTERNAL)hEventSem;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync AssertMsgReturn(pThis->u32Magic == RTSEMEVENT_MAGIC, ("pThis->u32Magic=%RX32 pThis=%p\n", pThis->u32Magic, pThis), VERR_INVALID_HANDLE);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * Signal the event object.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * We must use B_DO_NOT_RESCHEDULE since we are being used from an irq handler.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync release_sem_etc(pThis->SemId, 1, B_DO_NOT_RESCHEDULE);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * Worker for RTSemEventWaitEx and RTSemEventWaitExDebug.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * @returns VBox status code.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * @param pThis The event semaphore.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * @param fFlags See RTSemEventWaitEx.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * @param uTimeout See RTSemEventWaitEx.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * @param pSrcPos The source code position of the wait.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsyncstatic int rtR0SemEventWait(PRTSEMEVENTINTERNAL pThis, uint32_t fFlags, uint64_t uTimeout,
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * Validate the input.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync AssertMsgReturn(pThis->u32Magic == RTSEMEVENT_MAGIC, ("%p u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_PARAMETER);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync AssertReturn(RTSEMWAIT_FLAGS_ARE_VALID(fFlags), VERR_INVALID_PARAMETER);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync // likely not:
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync // flags |= B_KILL_CAN_INTERRUPT;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync status = acquire_sem_etc(pThis->SemId, 1, flags, timeout);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync /* fallthrough ? */
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsyncRTDECL(int) RTSemEventWaitEx(RTSEMEVENT hEventSem, uint32_t fFlags, uint64_t uTimeout)
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync return rtR0SemEventWait(hEventSem, fFlags, uTimeout, NULL);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync RTLOCKVALSRCPOS SrcPos = RTLOCKVALSRCPOS_INIT_NORMAL_API();
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync return rtR0SemEventWait(hEventSem, fFlags, uTimeout, &SrcPos);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsyncRTDECL(int) RTSemEventWaitExDebug(RTSEMEVENT hEventSem, uint32_t fFlags, uint64_t uTimeout,
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync RTLOCKVALSRCPOS SrcPos = RTLOCKVALSRCPOS_INIT_DEBUG_API();
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync return rtR0SemEventWait(hEventSem, fFlags, uTimeout, &SrcPos);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync /* At least that's what the API supports. */
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync return 1000;