block/progress_meter.c

   1 /*
   2  * Helper functionality for some process progress tracking.
   3  *
   4  * Copyright (c) 2011 IBM Corp.
   5  * Copyright (c) 2012, 2018 Red Hat, Inc.
   6  * Copyright (c) 2020 Virtuozzo International GmbH
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  24  * THE SOFTWARE.
  25  */
  26 #include "qemu/osdep.h"
  27 #include "qemu/progress_meter.h"
  28
  29 void progress_init(ProgressMeter *pm)
  30 {
  31     qemu_mutex_init(&pm->lock);
  32 }
  33
  34 void progress_destroy(ProgressMeter *pm)
  35 {
  36     qemu_mutex_destroy(&pm->lock);
  37 }
  38
  39 void progress_get_snapshot(ProgressMeter *pm, uint64_t *current,
  40                            uint64_t *total)
  41 {
  42     QEMU_LOCK_GUARD(&pm->lock);
  43
  44     *current = pm->current;
  45     *total = pm->total;
  46 }
  47
  48 void progress_work_done(ProgressMeter *pm, uint64_t done)
  49 {
  50     QEMU_LOCK_GUARD(&pm->lock);
  51     pm->current += done;
  52 }
  53
  54 void progress_set_remaining(ProgressMeter *pm, uint64_t remaining)
  55 {
  56     QEMU_LOCK_GUARD(&pm->lock);
  57     pm->total = pm->current + remaining;
  58 }
  59
  60 void progress_increase_remaining(ProgressMeter *pm, uint64_t delta)
  61 {
  62     QEMU_LOCK_GUARD(&pm->lock);
  63     pm->total += delta;
  64 }