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provide a facility for "delayed" progress reporting 

This allows for progress to be displayed only if the progress has not
reached a specified percentage treshold within a given delay in seconds.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
maint
Nicolas Pitre 2007-04-20 15:05:27 -04:00 committed by Junio C Hamano
parent 13aaf14825
commit 180a9f2268
2 changed files with 40 additions and 0 deletions
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34
progress.c
View File

@ -13,6 +13,8 @@ static void set_progress_signal(void)
struct sigaction sa;
struct itimerval v;

progress_update = 0;

memset(&sa, 0, sizeof(sa));
sa.sa_handler = progress_interval;
sigemptyset(&sa.sa_mask);
@ -35,6 +37,24 @@ static void clear_progress_signal(void)

int display_progress(struct progress *progress, unsigned n)
{
if (progress->delay) {
char buf[80];
if (!progress_update || --progress->delay)
return 0;
if (progress->total) {
unsigned percent = n * 100 / progress->total;
if (percent > progress->delayed_percent_treshold) {
/* inhibit this progress report entirely */
clear_progress_signal();
progress->delay = -1;
progress->total = 0;
return 0;
}
}
if (snprintf(buf, sizeof(buf),
progress->delayed_title, progress->total))
fprintf(stderr, "%s\n", buf);
}
if (progress->total) {
unsigned percent = n * 100 / progress->total;
if (percent != progress->last_percent || progress_update) {
@ -59,11 +79,25 @@ void start_progress(struct progress *progress, const char *title,
progress->prefix = prefix;
progress->total = total;
progress->last_percent = -1;
progress->delay = 0;
if (snprintf(buf, sizeof(buf), title, total))
fprintf(stderr, "%s\n", buf);
set_progress_signal();
}

void start_progress_delay(struct progress *progress, const char *title,
const char *prefix, unsigned total,
unsigned percent_treshold, unsigned delay)
{
progress->prefix = prefix;
progress->total = total;
progress->last_percent = -1;
progress->delayed_percent_treshold = percent_treshold;
progress->delayed_title = title;
progress->delay = delay;
set_progress_signal();
}

void stop_progress(struct progress *progress)
{
clear_progress_signal();

6
progress.h
View File

@ -5,11 +5,17 @@ struct progress {
const char *prefix;
unsigned total;
unsigned last_percent;
unsigned delay;
unsigned delayed_percent_treshold;
const char *delayed_title;
};

int display_progress(struct progress *progress, unsigned n);
void start_progress(struct progress *progress, const char *title,
const char *prefix, unsigned total);
void start_progress_delay(struct progress *progress, const char *title,
const char *prefix, unsigned total,
unsigned percent_treshold, unsigned delay);
void stop_progress(struct progress *progress);

#endif