/* $Id: semmutex-win.cpp $ */ /** @file * IPRT - Mutex Semaphores, Windows. */ /* * 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 . * * 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 LOG_GROUP RTLOGGROUP_SEMAPHORE #include #include #include "internal/iprt.h" #include #include #include #include #include #include #include "internal/magics.h" #include "internal/strict.h" /********************************************************************************************************************************* * Defined Constants And Macros * *********************************************************************************************************************************/ /** Posix internal representation of a Mutex semaphore. */ struct RTSEMMUTEXINTERNAL { /** Magic value (RTSEMMUTEX_MAGIC). */ uint32_t u32Magic; /** Recursion count. */ uint32_t volatile cRecursions; /** The owner thread. */ RTNATIVETHREAD volatile hNativeOwner; /** The mutex handle. */ HANDLE hMtx; #ifdef RTSEMMUTEX_STRICT /** Lock validator record associated with this mutex. */ RTLOCKVALRECEXCL ValidatorRec; #endif }; #undef RTSemMutexCreate RTDECL(int) RTSemMutexCreate(PRTSEMMUTEX phMutexSem) { return RTSemMutexCreateEx(phMutexSem, 0 /*fFlags*/, NIL_RTLOCKVALCLASS, RTLOCKVAL_SUB_CLASS_NONE, NULL); } RTDECL(int) RTSemMutexCreateEx(PRTSEMMUTEX phMutexSem, uint32_t fFlags, RTLOCKVALCLASS hClass, uint32_t uSubClass, const char *pszNameFmt, ...) { AssertReturn(!(fFlags & ~RTSEMMUTEX_FLAGS_NO_LOCK_VAL), VERR_INVALID_PARAMETER); /* * Create the semaphore. */ int rc; HANDLE hMtx = CreateMutex(NULL, FALSE, NULL); if (hMtx) { RTSEMMUTEXINTERNAL *pThis = (RTSEMMUTEXINTERNAL *)RTMemAlloc(sizeof(*pThis)); if (pThis) { pThis->u32Magic = RTSEMMUTEX_MAGIC; pThis->hMtx = hMtx; pThis->hNativeOwner = NIL_RTNATIVETHREAD; pThis->cRecursions = 0; #ifdef RTSEMMUTEX_STRICT if (!pszNameFmt) { static uint32_t volatile s_iMutexAnon = 0; RTLockValidatorRecExclInit(&pThis->ValidatorRec, hClass, uSubClass, pThis, !(fFlags & RTSEMMUTEX_FLAGS_NO_LOCK_VAL), "RTSemMutex-%u", ASMAtomicIncU32(&s_iMutexAnon) - 1); } else { va_list va; va_start(va, pszNameFmt); RTLockValidatorRecExclInitV(&pThis->ValidatorRec, hClass, uSubClass, pThis, !(fFlags & RTSEMMUTEX_FLAGS_NO_LOCK_VAL), pszNameFmt, va); va_end(va); } #else RT_NOREF_PV(hClass); RT_NOREF_PV(uSubClass); RT_NOREF_PV(pszNameFmt); #endif *phMutexSem = pThis; return VINF_SUCCESS; } rc = VERR_NO_MEMORY; } else rc = RTErrConvertFromWin32(GetLastError()); return rc; } RTDECL(int) RTSemMutexDestroy(RTSEMMUTEX hMutexSem) { /* * Validate. */ RTSEMMUTEXINTERNAL *pThis = hMutexSem; if (pThis == NIL_RTSEMMUTEX) return VINF_SUCCESS; AssertPtrReturn(pThis, VERR_INVALID_HANDLE); AssertReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, VERR_INVALID_HANDLE); /* * Close semaphore handle. */ AssertReturn(ASMAtomicCmpXchgU32(&pThis->u32Magic, RTSEMMUTEX_MAGIC_DEAD, RTSEMMUTEX_MAGIC), VERR_INVALID_HANDLE); HANDLE hMtx = pThis->hMtx; ASMAtomicWritePtr(&pThis->hMtx, INVALID_HANDLE_VALUE); int rc = VINF_SUCCESS; if (!CloseHandle(hMtx)) { rc = RTErrConvertFromWin32(GetLastError()); AssertMsgFailed(("%p rc=%d lasterr=%d\n", pThis->hMtx, rc, GetLastError())); } #ifdef RTSEMMUTEX_STRICT RTLockValidatorRecExclDelete(&pThis->ValidatorRec); #endif RTMemFree(pThis); return rc; } RTDECL(uint32_t) RTSemMutexSetSubClass(RTSEMMUTEX hMutexSem, uint32_t uSubClass) { #ifdef RTSEMMUTEX_STRICT /* * Validate. */ RTSEMMUTEXINTERNAL *pThis = hMutexSem; AssertPtrReturn(pThis, RTLOCKVAL_SUB_CLASS_INVALID); AssertReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, RTLOCKVAL_SUB_CLASS_INVALID); return RTLockValidatorRecExclSetSubClass(&pThis->ValidatorRec, uSubClass); #else RT_NOREF_PV(hMutexSem); RT_NOREF_PV(uSubClass); return RTLOCKVAL_SUB_CLASS_INVALID; #endif } /** * Internal worker for RTSemMutexRequestNoResume and it's debug companion. * * @returns Same as RTSEmMutexRequestNoResume * @param hMutexSem The mutex handle. * @param cMillies The number of milliseconds to wait. * @param pSrcPos The source position of the caller. */ DECL_FORCE_INLINE(int) rtSemMutexRequestNoResume(RTSEMMUTEX hMutexSem, RTMSINTERVAL cMillies, PCRTLOCKVALSRCPOS pSrcPos) { /* * Validate. */ RTSEMMUTEXINTERNAL *pThis = hMutexSem; AssertPtrReturn(pThis, VERR_INVALID_HANDLE); AssertReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, VERR_INVALID_HANDLE); /* * Check for recursive entry. */ RTNATIVETHREAD hNativeSelf = RTThreadNativeSelf(); RTNATIVETHREAD hNativeOwner; ASMAtomicReadHandle(&pThis->hNativeOwner, &hNativeOwner); if (hNativeOwner == hNativeSelf) { #ifdef RTSEMMUTEX_STRICT int rc9 = RTLockValidatorRecExclRecursion(&pThis->ValidatorRec, pSrcPos); if (RT_FAILURE(rc9)) return rc9; #endif ASMAtomicIncU32(&pThis->cRecursions); return VINF_SUCCESS; } /* * Lock mutex semaphore. */ RTTHREAD hThreadSelf = NIL_RTTHREAD; if (cMillies > 0) { #ifdef RTSEMMUTEX_STRICT hThreadSelf = RTThreadSelfAutoAdopt(); int rc9 = RTLockValidatorRecExclCheckOrderAndBlocking(&pThis->ValidatorRec, hThreadSelf, pSrcPos, true, cMillies, RTTHREADSTATE_MUTEX, true); if (RT_FAILURE(rc9)) return rc9; #else hThreadSelf = RTThreadSelf(); RTThreadBlocking(hThreadSelf, RTTHREADSTATE_MUTEX, true); RT_NOREF_PV(pSrcPos); #endif } DWORD rc = WaitForSingleObjectEx(pThis->hMtx, cMillies == RT_INDEFINITE_WAIT ? INFINITE : cMillies, TRUE /*fAlertable*/); RTThreadUnblocked(hThreadSelf, RTTHREADSTATE_MUTEX); switch (rc) { case WAIT_OBJECT_0: #ifdef RTSEMMUTEX_STRICT RTLockValidatorRecExclSetOwner(&pThis->ValidatorRec, hThreadSelf, pSrcPos, true); #endif ASMAtomicWriteHandle(&pThis->hNativeOwner, hNativeSelf); ASMAtomicWriteU32(&pThis->cRecursions, 1); return VINF_SUCCESS; case WAIT_TIMEOUT: return VERR_TIMEOUT; case WAIT_IO_COMPLETION: return VERR_INTERRUPTED; case WAIT_ABANDONED: return VERR_SEM_OWNER_DIED; default: AssertMsgFailed(("%u\n", rc)); case WAIT_FAILED: { int rc2 = RTErrConvertFromWin32(GetLastError()); AssertMsgFailed(("Wait on hMutexSem %p failed, rc=%d lasterr=%d\n", hMutexSem, rc, GetLastError())); if (rc2 != VINF_SUCCESS) return rc2; AssertMsgFailed(("WaitForSingleObject(event) -> rc=%d while converted lasterr=%d\n", rc, rc2)); return VERR_INTERNAL_ERROR; } } } #undef RTSemMutexRequestNoResume RTDECL(int) RTSemMutexRequestNoResume(RTSEMMUTEX hMutexSem, RTMSINTERVAL cMillies) { #ifndef RTSEMMUTEX_STRICT return rtSemMutexRequestNoResume(hMutexSem, cMillies, NULL); #else RTLOCKVALSRCPOS SrcPos = RTLOCKVALSRCPOS_INIT_NORMAL_API(); return rtSemMutexRequestNoResume(hMutexSem, cMillies, &SrcPos); #endif } RTDECL(int) RTSemMutexRequestNoResumeDebug(RTSEMMUTEX hMutexSem, RTMSINTERVAL cMillies, RTHCUINTPTR uId, RT_SRC_POS_DECL) { RTLOCKVALSRCPOS SrcPos = RTLOCKVALSRCPOS_INIT_DEBUG_API(); return rtSemMutexRequestNoResume(hMutexSem, cMillies, &SrcPos); } RTDECL(int) RTSemMutexRelease(RTSEMMUTEX hMutexSem) { /* * Validate. */ RTSEMMUTEXINTERNAL *pThis = hMutexSem; AssertPtrReturn(pThis, VERR_INVALID_HANDLE); AssertReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, VERR_INVALID_HANDLE); /* * Check ownership and recursions. */ RTNATIVETHREAD hNativeSelf = RTThreadNativeSelf(); RTNATIVETHREAD hNativeOwner; ASMAtomicReadHandle(&pThis->hNativeOwner, &hNativeOwner); if (RT_UNLIKELY(hNativeOwner != hNativeSelf)) { AssertMsgFailed(("Not owner of mutex %p!! hNativeSelf=%RTntrd Owner=%RTntrd cRecursions=%d\n", pThis, hNativeSelf, hNativeOwner, pThis->cRecursions)); return VERR_NOT_OWNER; } if (pThis->cRecursions > 1) { #ifdef RTSEMMUTEX_STRICT int rc9 = RTLockValidatorRecExclUnwind(&pThis->ValidatorRec); if (RT_FAILURE(rc9)) return rc9; #endif ASMAtomicDecU32(&pThis->cRecursions); return VINF_SUCCESS; } /* * Unlock mutex semaphore. */ #ifdef RTSEMMUTEX_STRICT int rc9 = RTLockValidatorRecExclReleaseOwner(&pThis->ValidatorRec, false); if (RT_FAILURE(rc9)) return rc9; #endif ASMAtomicWriteU32(&pThis->cRecursions, 0); ASMAtomicWriteHandle(&pThis->hNativeOwner, NIL_RTNATIVETHREAD); if (ReleaseMutex(pThis->hMtx)) return VINF_SUCCESS; int rc = RTErrConvertFromWin32(GetLastError()); AssertMsgFailed(("%p/%p, rc=%Rrc lasterr=%d\n", pThis, pThis->hMtx, rc, GetLastError())); return rc; } RTDECL(bool) RTSemMutexIsOwned(RTSEMMUTEX hMutexSem) { /* * Validate. */ RTSEMMUTEXINTERNAL *pThis = hMutexSem; AssertPtrReturn(pThis, false); AssertReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, false); RTNATIVETHREAD hNativeOwner; ASMAtomicReadHandle(&pThis->hNativeOwner, &hNativeOwner); return hNativeOwner != NIL_RTNATIVETHREAD; }