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/*
* QEMU progress printing utility functions
*
* Copyright (C) 2011 Jes Sorensen <Jes.Sorensen@redhat.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "qemu/qemu-progress.h"
struct progress_state {
float current;
float last_print;
float min_skip;
void (*print)(void);
void (*end)(void);
};
static struct progress_state state;
static volatile sig_atomic_t print_pending;
/*
* Simple progress print function.
* @percent relative percent of current operation
* @max percent of total operation
*/
static void progress_simple_print(void)
{
printf(" (%3.2f/100%%)\r", state.current);
fflush(stdout);
}
static void progress_simple_end(void)
{
printf("\n");
}
static void progress_simple_init(void)
{
state.print = progress_simple_print;
state.end = progress_simple_end;
}
#ifdef CONFIG_POSIX
static void sigusr_print(int signal)
{
print_pending = 1;
}
#endif
static void progress_dummy_print(void)
{
if (print_pending) {
fprintf(stderr, " (%3.2f/100%%)\n", state.current);
print_pending = 0;
}
}
static void progress_dummy_end(void)
{
}
static void progress_dummy_init(void)
{
#ifdef CONFIG_POSIX
struct sigaction action;
sigset_t set;
memset(&action, 0, sizeof(action));
sigfillset(&action.sa_mask);
action.sa_handler = sigusr_print;
action.sa_flags = 0;
sigaction(SIGUSR1, &action, NULL);
#ifdef SIGINFO
sigaction(SIGINFO, &action, NULL);
#endif
/*
* SIGUSR1 is SIG_IPI and gets blocked in qemu_init_main_loop(). In the
* tools that use the progress report SIGUSR1 isn't used in this meaning
* and instead should print the progress, so reenable it.
*/
sigemptyset(&set);
sigaddset(&set, SIGUSR1);
pthread_sigmask(SIG_UNBLOCK, &set, NULL);
#endif
state.print = progress_dummy_print;
state.end = progress_dummy_end;
}
/*
* Initialize progress reporting.
* If @enabled is false, actual reporting is suppressed. The user can
* still trigger a report by sending a SIGUSR1.
* Reports are also suppressed unless we've had at least @min_skip
* percent progress since the last report.
*/
void qemu_progress_init(int enabled, float min_skip)
{
state.min_skip = min_skip;
if (enabled) {
progress_simple_init();
} else {
progress_dummy_init();
}
}
void qemu_progress_end(void)
{
state.end();
}
/*
* Report progress.
* @delta is how much progress we made.
* If @max is zero, @delta is an absolute value of the total job done.
* Else, @delta is a progress delta since the last call, as a fraction
* of @max. I.e. the delta is @delta * @max / 100. This allows
* relative accounting of functions which may be a different fraction of
* the full job, depending on the context they are called in. I.e.
* a function might be considered 40% of the full job if used from
* bdrv_img_create() but only 20% if called from img_convert().
*/
void qemu_progress_print(float delta, int max)
{
float current;
if (max == 0) {
current = delta;
} else {
current = state.current + delta / 100 * max;
}
if (current > 100) {
current = 100;
}
state.current = current;
if (current > (state.last_print + state.min_skip) ||
current < (state.last_print - state.min_skip) ||
current == 100 || current == 0) {
state.last_print = state.current;
state.print();
}
}
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