| /* |
| * Simple text-based progress display module for GIT |
| * |
| * Copyright (c) 2007 by Nicolas Pitre <nico@fluxnic.net> |
| * |
| * This code is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include "git-compat-util.h" |
| #include "gettext.h" |
| #include "progress.h" |
| #include "strbuf.h" |
| #include "trace.h" |
| |
| #define TP_IDX_MAX 8 |
| |
| struct throughput { |
| off_t curr_total; |
| off_t prev_total; |
| uint64_t prev_ns; |
| unsigned int avg_bytes; |
| unsigned int avg_misecs; |
| unsigned int last_bytes[TP_IDX_MAX]; |
| unsigned int last_misecs[TP_IDX_MAX]; |
| unsigned int idx; |
| struct strbuf display; |
| }; |
| |
| struct progress { |
| const char *title; |
| int last_value; |
| unsigned total; |
| unsigned last_percent; |
| unsigned delay; |
| unsigned delayed_percent_treshold; |
| struct throughput *throughput; |
| }; |
| |
| static volatile sig_atomic_t progress_update; |
| |
| static void progress_interval(int signum) |
| { |
| progress_update = 1; |
| } |
| |
| 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); |
| sa.sa_flags = SA_RESTART; |
| sigaction(SIGALRM, &sa, NULL); |
| |
| v.it_interval.tv_sec = 1; |
| v.it_interval.tv_usec = 0; |
| v.it_value = v.it_interval; |
| setitimer(ITIMER_REAL, &v, NULL); |
| } |
| |
| static void clear_progress_signal(void) |
| { |
| struct itimerval v = {{0,},}; |
| setitimer(ITIMER_REAL, &v, NULL); |
| signal(SIGALRM, SIG_IGN); |
| progress_update = 0; |
| } |
| |
| static int is_foreground_fd(int fd) |
| { |
| int tpgrp = tcgetpgrp(fd); |
| return tpgrp < 0 || tpgrp == getpgid(0); |
| } |
| |
| static int display(struct progress *progress, unsigned n, const char *done) |
| { |
| const char *eol, *tp; |
| |
| if (progress->delay) { |
| 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; |
| } |
| } |
| } |
| |
| progress->last_value = n; |
| tp = (progress->throughput) ? progress->throughput->display.buf : ""; |
| eol = done ? done : " \r"; |
| if (progress->total) { |
| unsigned percent = n * 100 / progress->total; |
| if (percent != progress->last_percent || progress_update) { |
| progress->last_percent = percent; |
| if (is_foreground_fd(fileno(stderr)) || done) { |
| fprintf(stderr, "%s: %3u%% (%u/%u)%s%s", |
| progress->title, percent, n, |
| progress->total, tp, eol); |
| fflush(stderr); |
| } |
| progress_update = 0; |
| return 1; |
| } |
| } else if (progress_update) { |
| if (is_foreground_fd(fileno(stderr)) || done) { |
| fprintf(stderr, "%s: %u%s%s", |
| progress->title, n, tp, eol); |
| fflush(stderr); |
| } |
| progress_update = 0; |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| static void throughput_string(struct strbuf *buf, off_t total, |
| unsigned int rate) |
| { |
| strbuf_reset(buf); |
| strbuf_addstr(buf, ", "); |
| strbuf_humanise_bytes(buf, total); |
| strbuf_addstr(buf, " | "); |
| strbuf_humanise_bytes(buf, rate * 1024); |
| strbuf_addstr(buf, "/s"); |
| } |
| |
| void display_throughput(struct progress *progress, off_t total) |
| { |
| struct throughput *tp; |
| uint64_t now_ns; |
| unsigned int misecs, count, rate; |
| |
| if (!progress) |
| return; |
| tp = progress->throughput; |
| |
| now_ns = getnanotime(); |
| |
| if (!tp) { |
| progress->throughput = tp = calloc(1, sizeof(*tp)); |
| if (tp) { |
| tp->prev_total = tp->curr_total = total; |
| tp->prev_ns = now_ns; |
| strbuf_init(&tp->display, 0); |
| } |
| return; |
| } |
| tp->curr_total = total; |
| |
| /* only update throughput every 0.5 s */ |
| if (now_ns - tp->prev_ns <= 500000000) |
| return; |
| |
| /* |
| * We have x = bytes and y = nanosecs. We want z = KiB/s: |
| * |
| * z = (x / 1024) / (y / 1000000000) |
| * z = x / y * 1000000000 / 1024 |
| * z = x / (y * 1024 / 1000000000) |
| * z = x / y' |
| * |
| * To simplify things we'll keep track of misecs, or 1024th of a sec |
| * obtained with: |
| * |
| * y' = y * 1024 / 1000000000 |
| * y' = y * (2^10 / 2^42) * (2^42 / 1000000000) |
| * y' = y / 2^32 * 4398 |
| * y' = (y * 4398) >> 32 |
| */ |
| misecs = ((now_ns - tp->prev_ns) * 4398) >> 32; |
| |
| count = total - tp->prev_total; |
| tp->prev_total = total; |
| tp->prev_ns = now_ns; |
| tp->avg_bytes += count; |
| tp->avg_misecs += misecs; |
| rate = tp->avg_bytes / tp->avg_misecs; |
| tp->avg_bytes -= tp->last_bytes[tp->idx]; |
| tp->avg_misecs -= tp->last_misecs[tp->idx]; |
| tp->last_bytes[tp->idx] = count; |
| tp->last_misecs[tp->idx] = misecs; |
| tp->idx = (tp->idx + 1) % TP_IDX_MAX; |
| |
| throughput_string(&tp->display, total, rate); |
| if (progress->last_value != -1 && progress_update) |
| display(progress, progress->last_value, NULL); |
| } |
| |
| int display_progress(struct progress *progress, unsigned n) |
| { |
| return progress ? display(progress, n, NULL) : 0; |
| } |
| |
| struct progress *start_progress_delay(const char *title, unsigned total, |
| unsigned percent_treshold, unsigned delay) |
| { |
| struct progress *progress = malloc(sizeof(*progress)); |
| if (!progress) { |
| /* unlikely, but here's a good fallback */ |
| fprintf(stderr, "%s...\n", title); |
| fflush(stderr); |
| return NULL; |
| } |
| progress->title = title; |
| progress->total = total; |
| progress->last_value = -1; |
| progress->last_percent = -1; |
| progress->delayed_percent_treshold = percent_treshold; |
| progress->delay = delay; |
| progress->throughput = NULL; |
| set_progress_signal(); |
| return progress; |
| } |
| |
| struct progress *start_progress(const char *title, unsigned total) |
| { |
| return start_progress_delay(title, total, 0, 0); |
| } |
| |
| void stop_progress(struct progress **p_progress) |
| { |
| stop_progress_msg(p_progress, _("done")); |
| } |
| |
| void stop_progress_msg(struct progress **p_progress, const char *msg) |
| { |
| struct progress *progress = *p_progress; |
| if (!progress) |
| return; |
| *p_progress = NULL; |
| if (progress->last_value != -1) { |
| /* Force the last update */ |
| char buf[128], *bufp; |
| size_t len = strlen(msg) + 5; |
| struct throughput *tp = progress->throughput; |
| |
| bufp = (len < sizeof(buf)) ? buf : xmallocz(len); |
| if (tp) { |
| unsigned int rate = !tp->avg_misecs ? 0 : |
| tp->avg_bytes / tp->avg_misecs; |
| throughput_string(&tp->display, tp->curr_total, rate); |
| } |
| progress_update = 1; |
| xsnprintf(bufp, len + 1, ", %s.\n", msg); |
| display(progress, progress->last_value, bufp); |
| if (buf != bufp) |
| free(bufp); |
| } |
| clear_progress_signal(); |
| if (progress->throughput) |
| strbuf_release(&progress->throughput->display); |
| free(progress->throughput); |
| free(progress); |
| } |