mirror of
https://github.com/xen-project/xen.git
synced 2026-10-28 18:21:39 +01:00
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
/******************************************************************************
|
|
*
|
|
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
|
|
* Use is subject to license terms.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation;
|
|
* version 2.1 of the License.
|
|
*
|
|
* This library 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "xc_private.h"
|
|
|
|
/* Optionally flush file to disk and discard page cache */
|
|
void discard_file_cache(xc_interface *xch, int fd, int flush)
|
|
{
|
|
off_t cur = 0;
|
|
int saved_errno = errno;
|
|
|
|
if ( flush && (fsync(fd) < 0) )
|
|
{
|
|
/*PERROR("Failed to flush file: %s", strerror(errno));*/
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Calculate last page boundary of amount written so far
|
|
* unless we are flushing in which case entire cache
|
|
* is discarded.
|
|
*/
|
|
if ( !flush )
|
|
{
|
|
if ( (cur = lseek(fd, 0, SEEK_CUR)) == (off_t)-1 )
|
|
cur = 0;
|
|
cur &= ~(XC_PAGE_SIZE-1);
|
|
}
|
|
|
|
/* Discard from the buffer cache. */
|
|
if ( posix_fadvise64(fd, 0, cur, POSIX_FADV_DONTNEED) < 0 )
|
|
{
|
|
/*PERROR("Failed to discard cache: %s", strerror(errno));*/
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
errno = saved_errno;
|
|
}
|
|
|
|
void *xc_memalign(xc_interface *xch, size_t alignment, size_t size)
|
|
{
|
|
int ret;
|
|
void *ptr;
|
|
|
|
ret = posix_memalign(&ptr, alignment, size);
|
|
if (ret != 0 || !ptr)
|
|
return NULL;
|
|
|
|
return ptr;
|
|
}
|
|
|
|
/*
|
|
* Local variables:
|
|
* mode: C
|
|
* c-file-style: "BSD"
|
|
* c-basic-offset: 4
|
|
* tab-width: 4
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*/
|