Merge remote-tracking branch 'mst/for_anthony' into staging
[qemu/mdroth.git] / qemu-progress.c
bloba4894c0dfc5ecaa0ebb2091d71392da1d9ca7c46
1 /*
2 * QEMU progress printing utility functions
4 * Copyright (C) 2011 Jes Sorensen <Jes.Sorensen@redhat.com>
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
25 #include "qemu-common.h"
26 #include "osdep.h"
27 #include "sysemu.h"
28 #include <stdio.h>
29 #include <signal.h>
31 struct progress_state {
32 float current;
33 float last_print;
34 float min_skip;
35 void (*print)(void);
36 void (*end)(void);
39 static struct progress_state state;
40 static volatile sig_atomic_t print_pending;
43 * Simple progress print function.
44 * @percent relative percent of current operation
45 * @max percent of total operation
47 static void progress_simple_print(void)
49 printf(" (%3.2f/100%%)\r", state.current);
50 fflush(stdout);
53 static void progress_simple_end(void)
55 printf("\n");
58 static void progress_simple_init(void)
60 state.print = progress_simple_print;
61 state.end = progress_simple_end;
64 #ifdef CONFIG_POSIX
65 static void sigusr_print(int signal)
67 print_pending = 1;
69 #endif
71 static void progress_dummy_print(void)
73 if (print_pending) {
74 fprintf(stderr, " (%3.2f/100%%)\n", state.current);
75 print_pending = 0;
79 static void progress_dummy_end(void)
83 static void progress_dummy_init(void)
85 #ifdef CONFIG_POSIX
86 struct sigaction action;
88 memset(&action, 0, sizeof(action));
89 sigfillset(&action.sa_mask);
90 action.sa_handler = sigusr_print;
91 action.sa_flags = 0;
92 sigaction(SIGUSR1, &action, NULL);
93 #endif
95 state.print = progress_dummy_print;
96 state.end = progress_dummy_end;
99 void qemu_progress_init(int enabled, float min_skip)
101 state.min_skip = min_skip;
102 if (enabled) {
103 progress_simple_init();
104 } else {
105 progress_dummy_init();
109 void qemu_progress_end(void)
111 state.end();
114 void qemu_progress_print(float percent, int max)
116 float current;
118 if (max == 0) {
119 current = percent;
120 } else {
121 current = state.current + percent / 100 * max;
123 if (current > 100) {
124 current = 100;
126 state.current = current;
128 if (current > (state.last_print + state.min_skip) ||
129 (current == 100) || (current == 0)) {
130 state.last_print = state.current;
131 state.print();