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https://github.com/xen-project/xen.git
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Juergen Gross
af6c78d9dc
Today tools/libxc needs to be built after tools/libs as libxenctrl is depending on some libraries in tools/libs. This in turn blocks moving other libraries depending on libxenctrl below tools/libs. So carve out libxenctrl from tools/libxc and move it into tools/libs/ctrl. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org> (stubdom parts) Acked-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com> (python parts) Acked-by: Wei Liu <wl@xen.org>
78 lines
2.0 KiB
C
78 lines
2.0 KiB
C
/******************************************************************************
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*
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* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "xc_private.h"
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/* Optionally flush file to disk and discard page cache */
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void discard_file_cache(xc_interface *xch, int fd, int flush)
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{
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off_t cur = 0;
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int saved_errno = errno;
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if ( flush && (fsync(fd) < 0) )
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{
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/*PERROR("Failed to flush file: %s", strerror(errno));*/
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goto out;
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}
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/*
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* Calculate last page boundary of amount written so far
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* unless we are flushing in which case entire cache
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* is discarded.
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*/
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if ( !flush )
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{
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if ( (cur = lseek(fd, 0, SEEK_CUR)) == (off_t)-1 )
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cur = 0;
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cur &= ~(XC_PAGE_SIZE-1);
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}
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/* Discard from the buffer cache. */
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if ( posix_fadvise64(fd, 0, cur, POSIX_FADV_DONTNEED) < 0 )
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{
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/*PERROR("Failed to discard cache: %s", strerror(errno));*/
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goto out;
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}
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out:
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errno = saved_errno;
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}
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void *xc_memalign(xc_interface *xch, size_t alignment, size_t size)
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{
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int ret;
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void *ptr;
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ret = posix_memalign(&ptr, alignment, size);
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if (ret != 0 || !ptr)
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return NULL;
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return ptr;
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}
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/*
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* Local variables:
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* mode: C
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* c-file-style: "BSD"
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* c-basic-offset: 4
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* tab-width: 4
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* indent-tabs-mode: nil
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* End:
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*/
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