Files
libguestfs/df/parallel.h
2015-10-31 22:53:14 +00:00

49 lines
1.8 KiB
C

/* virt-df & virt-alignment-scan parallel appliances code.
* Copyright (C) 2013 Red Hat Inc.
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef GUESTFS_PARALLEL_H_
#define GUESTFS_PARALLEL_H_
#if defined(HAVE_LIBVIRT)
#include "domains.h"
/* The work function should do the work (inspecting the domain, etc.)
* on domain index 'i'. However it MUST NOT print out any result
* directly. Instead it prints anything it needs to the supplied
* 'FILE *'.
* Returns 0 on success or -1 on error.
*/
typedef int (*work_fn) (guestfs_h *g, size_t i, FILE *fp);
/* Run the threads and work through the global list of libvirt
* domains. 'option_P' is whatever the user passed in the '-P'
* option, or 0 if the user didn't use the '-P' option (in which case
* the number of threads is chosen heuristically). 'options_handle'
* (which may be NULL) is the global guestfs handle created by the
* options mini-library.
*
* Returns 0 if all work items completed successfully, or -1 if there
* was an error.
*/
extern int start_threads (size_t option_P, guestfs_h *options_handle, work_fn work);
#endif /* HAVE_LIBVIRT */
#endif /* GUESTFS_PARALLEL_H_ */