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Diffstat (limited to 'src/VBox/Runtime/include/internal/pipe.h')
| -rw-r--r-- | src/VBox/Runtime/include/internal/pipe.h | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/src/VBox/Runtime/include/internal/pipe.h b/src/VBox/Runtime/include/internal/pipe.h new file mode 100644 index 00000000..5f63c5a6 --- /dev/null +++ b/src/VBox/Runtime/include/internal/pipe.h @@ -0,0 +1,138 @@ +/* $Id: pipe.h $ */ +/** @file + * IPRT - Internal RTPipe header. + */ + +/* + * Copyright (C) 2010-2023 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 + */ + +#ifndef IPRT_INCLUDED_INTERNAL_pipe_h +#define IPRT_INCLUDED_INTERNAL_pipe_h +#ifndef RT_WITHOUT_PRAGMA_ONCE +# pragma once +#endif + +#include <iprt/pipe.h> + +RT_C_DECLS_BEGIN + +/** + * Internal RTPollSetAdd helper that returns the handle that should be added to + * the pollset. + * + * @returns Valid handle on success, INVALID_HANDLE_VALUE on failure. + * @param hPipe The pipe handle. + * @param fEvents The events we're polling for. + * @param phNative Where to put the primary handle. + */ +int rtPipePollGetHandle(RTPIPE hPipe, uint32_t fEvents, PRTHCINTPTR phNative); + +/** + * Internal RTPoll helper that polls the pipe handle and, if @a fNoWait is + * clear, starts whatever actions we've got running during the poll call. + * + * @returns 0 if no pending events, actions initiated if @a fNoWait is clear. + * Event mask (in @a fEvents) and no actions if the handle is ready + * already. + * UINT32_MAX (asserted) if the pipe handle is busy in I/O or a + * different poll set. + * + * @param hPipe The pipe handle. + * @param hPollSet The poll set handle (for access checks). + * @param fEvents The events we're polling for. + * @param fFinalEntry Set if this is the final entry for this handle + * in this poll set. This can be used for dealing + * with duplicate entries. + * @param fNoWait Set if it's a zero-wait poll call. Clear if + * we'll wait for an event to occur. + */ +uint32_t rtPipePollStart(RTPIPE hPipe, RTPOLLSET hPollSet, uint32_t fEvents, bool fFinalEntry, bool fNoWait); + +/** + * Called after a WaitForMultipleObjects returned in order to check for pending + * events and stop whatever actions that rtPipePollStart() initiated. + * + * @returns Event mask or 0. + * + * @param hPipe The pipe handle. + * @param fEvents The events we're polling for. + * @param fFinalEntry Set if this is the final entry for this handle + * in this poll set. This can be used for dealing + * with duplicate entries. Only keep in mind that + * this method is called in reverse order, so the + * first call will have this set (when the entire + * set was processed). + * @param fHarvestEvents Set if we should check for pending events. + */ +uint32_t rtPipePollDone(RTPIPE hPipe, uint32_t fEvents, bool fFinalEntry, bool fHarvestEvents); + + +/** + * Fakes basic query info data for RTPipeQueryInfo. + * + * @param pObjInfo The output structure. + * @param enmAddAttr The extra attribute. + * @param fReadPipe Set if read pipe, clear if write pipe. + */ +DECLINLINE(void) rtPipeFakeQueryInfo(PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr, bool fReadPipe) +{ + RT_ZERO(*pObjInfo); + if (fReadPipe) + pObjInfo->Attr.fMode = RTFS_TYPE_FIFO | RTFS_UNIX_IRUSR | RTFS_DOS_READONLY; + else + pObjInfo->Attr.fMode = RTFS_TYPE_FIFO | RTFS_UNIX_IWUSR; + pObjInfo->Attr.enmAdditional = enmAddAttr; + switch (enmAddAttr) + { + case RTFSOBJATTRADD_UNIX: + pObjInfo->Attr.u.Unix.cHardlinks = 1; + break; + case RTFSOBJATTRADD_UNIX_OWNER: + pObjInfo->Attr.u.UnixOwner.uid = NIL_RTUID; + break; + case RTFSOBJATTRADD_UNIX_GROUP: + pObjInfo->Attr.u.UnixGroup.gid = NIL_RTGID; + break; + case RTFSOBJATTRADD_EASIZE: + break; + case RTFSOBJATTRADD_32BIT_SIZE_HACK: + case RTFSOBJATTRADD_NOTHING: + /* shut up gcc. */ + break; + /* no default, want warnings. */ + } +} + + +RT_C_DECLS_END + +#endif /* !IPRT_INCLUDED_INTERNAL_pipe_h */ + |