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dc6a0757c4
This allows for better management of progress "object" existence, as well as making the progress display implementation more independent from its callers. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
129 lines
2.9 KiB
C
129 lines
2.9 KiB
C
#include "git-compat-util.h"
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#include "progress.h"
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struct progress {
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const char *title;
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int last_value;
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unsigned total;
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unsigned last_percent;
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unsigned delay;
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unsigned delayed_percent_treshold;
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};
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static volatile sig_atomic_t progress_update;
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static void progress_interval(int signum)
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{
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progress_update = 1;
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}
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static void set_progress_signal(void)
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{
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struct sigaction sa;
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struct itimerval v;
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progress_update = 0;
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memset(&sa, 0, sizeof(sa));
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sa.sa_handler = progress_interval;
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sigemptyset(&sa.sa_mask);
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sa.sa_flags = SA_RESTART;
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sigaction(SIGALRM, &sa, NULL);
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v.it_interval.tv_sec = 1;
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v.it_interval.tv_usec = 0;
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v.it_value = v.it_interval;
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setitimer(ITIMER_REAL, &v, NULL);
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}
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static void clear_progress_signal(void)
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{
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struct itimerval v = {{0,},};
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setitimer(ITIMER_REAL, &v, NULL);
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signal(SIGALRM, SIG_IGN);
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progress_update = 0;
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}
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static int display(struct progress *progress, unsigned n, int done)
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{
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char *eol;
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if (progress->delay) {
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if (!progress_update || --progress->delay)
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return 0;
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if (progress->total) {
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unsigned percent = n * 100 / progress->total;
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if (percent > progress->delayed_percent_treshold) {
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/* inhibit this progress report entirely */
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clear_progress_signal();
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progress->delay = -1;
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progress->total = 0;
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return 0;
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}
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}
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}
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progress->last_value = n;
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eol = done ? ", done. \n" : " \r";
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if (progress->total) {
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unsigned percent = n * 100 / progress->total;
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if (percent != progress->last_percent || progress_update) {
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progress->last_percent = percent;
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fprintf(stderr, "%s: %3u%% (%u/%u)%s", progress->title,
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percent, n, progress->total, eol);
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progress_update = 0;
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return 1;
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}
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} else if (progress_update) {
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fprintf(stderr, "%s: %u%s", progress->title, n, eol);
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progress_update = 0;
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return 1;
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}
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return 0;
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}
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int display_progress(struct progress *progress, unsigned n)
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{
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return progress ? display(progress, n, 0) : 0;
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}
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struct progress *start_progress_delay(const char *title, unsigned total,
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unsigned percent_treshold, unsigned delay)
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{
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struct progress *progress = malloc(sizeof(*progress));
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if (!progress) {
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/* unlikely, but here's a good fallback */
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fprintf(stderr, "%s...\n", title);
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return NULL;
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}
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progress->title = title;
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progress->total = total;
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progress->last_value = -1;
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progress->last_percent = -1;
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progress->delayed_percent_treshold = percent_treshold;
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progress->delay = delay;
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set_progress_signal();
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return progress;
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}
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struct progress *start_progress(const char *title, unsigned total)
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{
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return start_progress_delay(title, total, 0, 0);
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}
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void stop_progress(struct progress **p_progress)
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{
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struct progress *progress = *p_progress;
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if (!progress)
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return;
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*p_progress = NULL;
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if (progress->last_value != -1) {
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/* Force the last update */
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progress_update = 1;
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display(progress, progress->last_value, 1);
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}
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clear_progress_signal();
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free(progress);
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}
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