vasilito
7686729069
Extract protocol-agnostic FenceTimeline from Intel to shared src/drivers/fence.rs — atomic-based fence tracking suitable for Intel, VIRGL, and AMD drivers. Extract protocol-agnostic SyncobjManager from Intel to shared src/drivers/syncobj.rs — syncobj create/destroy/signal/reset/ wait/query and sync_file fd export/import. Wire both into VirtioDriver: - Add FenceTimeline + SyncobjManager fields - Implement all 5 GpuDriver syncobj trait methods (create, destroy, wait, export_fd, import_fd) - Track fence seqnos in virgl_submit_3d (allocate before submit, signal after completion) Intel fence.rs and syncobj.rs converted to thin re-export modules pointing at shared sources — no behavioral change for Intel driver. This gives Mesa VIRGL userspace the standard DRM syncobj API for GPU/compositor synchronization.
64 lines
2.5 KiB
C
64 lines
2.5 KiB
C
/* Retrieve information about a FILE stream.
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Copyright (C) 2007-2017 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <config.h>
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/* Specification. */
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#include "fwriting.h"
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#include "stdio-impl.h"
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bool
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fwriting (FILE *fp)
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{
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/* Most systems provide FILE as a struct and the necessary bitmask in
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<stdio.h>, because they need it for implementing getc() and putc() as
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fast macros. */
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#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
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return (fp->_flags & (_IO_NO_READS | _IO_CURRENTLY_PUTTING)) != 0;
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#elif defined __sferror || defined __DragonFly__ || defined __ANDROID__
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/* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin, Minix 3, Android */
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return (fp_->_flags & __SWR) != 0;
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#elif defined __EMX__ /* emx+gcc */
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return (fp->_flags & _IOWRT) != 0;
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#elif defined __minix /* Minix */
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return (fp->_flags & _IOWRITING) != 0;
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#elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw, MSVC, NonStop Kernel */
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return (fp_->_flag & _IOWRT) != 0;
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#elif defined __UCLIBC__ /* uClibc */
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return (fp->__modeflags & __FLAG_WRITING) != 0;
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#elif defined __QNX__ /* QNX */
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return ((fp->_Mode & 0x1 /* _MOPENR */) == 0
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|| (fp->_Mode & 0x2000 /* _MWRITE */) != 0);
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#elif defined __MINT__ /* Atari FreeMiNT */
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if (!fp->__mode.__read)
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return 1;
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if (!fp->__mode.__write)
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return 0;
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# ifdef _IO_CURRENTLY_PUTTING /* Flag added on 2009-02-28 */
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return (fp->__flags & _IO_CURRENTLY_PUTTING) != 0;
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# else
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return (fp->__buffer < fp->__put_limit /*|| fp->__bufp == fp->__get_limit ??*/);
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# endif
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#elif defined EPLAN9 /* Plan9 */
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if (fp->state == 0 /* CLOSED */ || fp->state == 3 /* RD */)
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return 0;
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return (fp->state == 4 /* WR */ && (fp->bufl == 0 || fp->wp < fp->rp));
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#else
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# error "Please port gnulib fwriting.c to your platform!"
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#endif
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}
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