semeventmulti-r0drv-os2.cpp revision b79e4344bf4eb8033fd06d560cd864192728bd0b
5b281ba489ca18f0380d7efc7a5108b606cce449vboxsync * IPRT - Multiple Release Event Semaphores, Ring-0 Driver, OS/2.
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync * Copyright (c) 2007 knut st. osmundsen <bird-src-spam@anduin.net>
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync * Permission is hereby granted, free of charge, to any person
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync * obtaining a copy of this software and associated documentation
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync * files (the "Software"), to deal in the Software without
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync * restriction, including without limitation the rights to use,
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync * copy, modify, merge, publish, distribute, sublicense, and/or sell
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d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync * Software is furnished to do so, subject to the following
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync * conditions:
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync * The above copyright notice and this permission notice shall be
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync * included in all copies or substantial portions of the Software.
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync/*******************************************************************************
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync* Header Files *
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync*******************************************************************************/
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync/*******************************************************************************
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync* Structures and Typedefs *
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync*******************************************************************************/
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync * OS/2 multiple release event semaphore.
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync /** Magic value (RTSEMEVENTMULTI_MAGIC). */
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync /** The number of waiting threads. */
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync /** Set if the event object is signaled. */
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync /** The number of threads in the process of waking up. */
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync /** The OS/2 spinlock protecting this structure. */
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync} RTSEMEVENTMULTIINTERNAL, *PRTSEMEVENTMULTIINTERNAL;
ab93606043a9881487aa83be04191d2f4ea24071vboxsyncRTDECL(int) RTSemEventMultiCreate(PRTSEMEVENTMULTI phEventMultiSem)
ab93606043a9881487aa83be04191d2f4ea24071vboxsync return RTSemEventMultiCreateEx(phEventMultiSem, 0 /*fFlags*/, NIL_RTLOCKVALCLASS, NULL);
ab93606043a9881487aa83be04191d2f4ea24071vboxsyncRTDECL(int) RTSemEventMultiCreateEx(PRTSEMEVENTMULTI phEventMultiSem, uint32_t fFlags, RTLOCKVALCLASS hClass,
ab93606043a9881487aa83be04191d2f4ea24071vboxsync const char *pszNameFmt, ...)
ab93606043a9881487aa83be04191d2f4ea24071vboxsync AssertReturn(!(fFlags & ~RTSEMEVENTMULTI_FLAGS_NO_LOCK_VAL), VERR_INVALID_PARAMETER);
ab93606043a9881487aa83be04191d2f4ea24071vboxsync AssertPtrReturn(phEventMultiSem, VERR_INVALID_POINTER);
ab93606043a9881487aa83be04191d2f4ea24071vboxsync AssertCompile(sizeof(RTSEMEVENTMULTIINTERNAL) > sizeof(void *));
ab93606043a9881487aa83be04191d2f4ea24071vboxsync PRTSEMEVENTMULTIINTERNAL pThis = (PRTSEMEVENTMULTIINTERNAL)RTMemAlloc(sizeof(*pThis));
ab93606043a9881487aa83be04191d2f4ea24071vboxsyncRTDECL(int) RTSemEventMultiDestroy(RTSEMEVENTMULTI hEventMultiSem)
ab93606043a9881487aa83be04191d2f4ea24071vboxsync PRTSEMEVENTMULTIINTERNAL pThis = (PRTSEMEVENTMULTIINTERNAL)hEventMultiSem;
ab93606043a9881487aa83be04191d2f4ea24071vboxsync AssertMsgReturn(pThis->u32Magic == RTSEMEVENTMULTI_MAGIC, ("pThis=%p u32Magic=%#x\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
ab93606043a9881487aa83be04191d2f4ea24071vboxsync ASMAtomicIncU32(&pThis->u32Magic); /* make the handle invalid */
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync /* abort waiting thread, last man cleans up. */
ab93606043a9881487aa83be04191d2f4ea24071vboxsync ASMAtomicXchgU32(&pThis->cWaking, pThis->cWaking + pThis->cWaiters);
ab93606043a9881487aa83be04191d2f4ea24071vboxsync KernWakeup((ULONG)pThis, WAKEUP_DATA | WAKEUP_BOOST, &cThreads, (ULONG)VERR_SEM_DESTROYED);
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync /* the last waking thread is gonna do the cleanup */
ab93606043a9881487aa83be04191d2f4ea24071vboxsyncRTDECL(int) RTSemEventMultiSignal(RTSEMEVENTMULTI hEventMultiSem)
ab93606043a9881487aa83be04191d2f4ea24071vboxsync PRTSEMEVENTMULTIINTERNAL pThis = (PRTSEMEVENTMULTIINTERNAL)hEventMultiSem;
ab93606043a9881487aa83be04191d2f4ea24071vboxsync AssertMsgReturn(pThis->u32Magic == RTSEMEVENTMULTI_MAGIC,
ab93606043a9881487aa83be04191d2f4ea24071vboxsync ("pThis=%p u32Magic=%#x\n", pThis, pThis->u32Magic),
ab93606043a9881487aa83be04191d2f4ea24071vboxsync ASMAtomicXchgU32(&pThis->cWaking, pThis->cWaking + pThis->cWaiters);
ab93606043a9881487aa83be04191d2f4ea24071vboxsync KernWakeup((ULONG)pThis, WAKEUP_DATA, &cThreads, VINF_SUCCESS);
ab93606043a9881487aa83be04191d2f4ea24071vboxsyncRTDECL(int) RTSemEventMultiReset(RTSEMEVENTMULTI hEventMultiSem)
ab93606043a9881487aa83be04191d2f4ea24071vboxsync PRTSEMEVENTMULTIINTERNAL pThis = (PRTSEMEVENTMULTIINTERNAL)hEventMultiSem;
ab93606043a9881487aa83be04191d2f4ea24071vboxsync AssertMsgReturn(pThis->u32Magic == RTSEMEVENTMULTI_MAGIC,
ab93606043a9881487aa83be04191d2f4ea24071vboxsync ("pThis=%p u32Magic=%#x\n", pThis, pThis->u32Magic),
b79e4344bf4eb8033fd06d560cd864192728bd0bvboxsyncstatic int rtSemEventMultiWait(RTSEMEVENTMULTI hEventMultiSem, RTMSINTERVAL cMillies, bool fInterruptible)
ab93606043a9881487aa83be04191d2f4ea24071vboxsync PRTSEMEVENTMULTIINTERNAL pThis = (PRTSEMEVENTMULTIINTERNAL)hEventMultiSem;
ab93606043a9881487aa83be04191d2f4ea24071vboxsync AssertMsgReturn(pThis->u32Magic == RTSEMEVENTMULTI_MAGIC,
ab93606043a9881487aa83be04191d2f4ea24071vboxsync ("pThis=%p u32Magic=%#x\n", pThis, pThis->u32Magic),
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync cMillies == RT_INDEFINITE_WAIT ? SEM_INDEFINITE_WAIT : cMillies,
0167cbe183669a2a2a1ce7009f619135ecc7cc4fvboxsync BLOCK_SPINLOCK | (!fInterruptible ? BLOCK_UNINTERRUPTABLE : 0),
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync Assert(rc == VINF_SUCCESS || rc == VERR_SEM_DESTROYED);
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync /* The event was destroyed (ulData == VINF_SUCCESS if it was after we awoke), as
d1c5a03c19683c719b94496bb998fde2f2e5e622vboxsync the last thread do the cleanup. */
b79e4344bf4eb8033fd06d560cd864192728bd0bvboxsyncRTDECL(int) RTSemEventMultiWait(RTSEMEVENTMULTI hEventMultiSem, RTMSINTERVAL cMillies)
ab93606043a9881487aa83be04191d2f4ea24071vboxsync return rtSemEventMultiWait(hEventMultiSem, cMillies, false /* not interruptible */);
b79e4344bf4eb8033fd06d560cd864192728bd0bvboxsyncRTDECL(int) RTSemEventMultiWaitNoResume(RTSEMEVENTMULTI hEventMultiSem, RTMSINTERVAL cMillies)
ab93606043a9881487aa83be04191d2f4ea24071vboxsync return rtSemEventMultiWait(hEventMultiSem, cMillies, true /* interruptible */);