status: show progress bar if refreshing the index takes too long

diff --git a/preload-index.c b/preload-index.c
index 4d08d4487460f839f39f667c714f1bb85fa1e144..2541b307e8bafc7280c0ded43346a0d723af1768 100644 (file)
--- a/preload-index.c
+++ b/preload-index.c
@@ -5,10 +5,12 @@
 #include "pathspec.h"
 #include "dir.h"
 #include "fsmonitor.h"
+#include "progress.h"
 
 #ifdef NO_PTHREADS
 static void preload_index(struct index_state *index,
-                         const struct pathspec *pathspec)
+                         const struct pathspec *pathspec,
+                         unsigned int refresh_flags)
 {
        ; /* nothing */
 }
@@ -25,16 +27,23 @@ static void preload_index(struct index_state *index,
 #define MAX_PARALLEL (20)
 #define THREAD_COST (500)
 
+struct progress_data {
+       unsigned long n;
+       struct progress *progress;
+       pthread_mutex_t mutex;
+};
+
 struct thread_data {
        pthread_t pthread;
        struct index_state *index;
        struct pathspec pathspec;
+       struct progress_data *progress;
        int offset, nr;
 };
 
 static void *preload_thread(void *_data)
 {
-       int nr;
+       int nr, last_nr;
        struct thread_data *p = _data;
        struct index_state *index = p->index;
        struct cache_entry **cep = index->cache + p->offset;
@@ -43,6 +52,7 @@ static void *preload_thread(void *_data)
        nr = p->nr;
        if (nr + p->offset > index->cache_nr)
                nr = index->cache_nr - p->offset;
+       last_nr = nr;
 
        do {
                struct cache_entry *ce = *cep++;
@@ -58,7 +68,16 @@ static void *preload_thread(void *_data)
                        continue;
                if (ce->ce_flags & CE_FSMONITOR_VALID)
                        continue;
-               if (!ce_path_match(ce, &p->pathspec, NULL))
+               if (p->progress && !(nr & 31)) {
+                       struct progress_data *pd = p->progress;
+
+                       pthread_mutex_lock(&pd->mutex);
+                       pd->n += last_nr - nr;
+                       display_progress(pd->progress, pd->n);
+                       pthread_mutex_unlock(&pd->mutex);
+                       last_nr = nr;
+               }
+               if (!ce_path_match(index, ce, &p->pathspec, NULL))
                        continue;
                if (threaded_has_symlink_leading_path(&cache, ce->name, ce_namelen(ce)))
                        continue;
@@ -69,16 +88,25 @@ static void *preload_thread(void *_data)
                ce_mark_uptodate(ce);
                mark_fsmonitor_valid(ce);
        } while (--nr > 0);
+       if (p->progress) {
+               struct progress_data *pd = p->progress;
+
+               pthread_mutex_lock(&pd->mutex);
+               display_progress(pd->progress, pd->n + last_nr);
+               pthread_mutex_unlock(&pd->mutex);
+       }
        cache_def_clear(&cache);
        return NULL;
 }
 
 static void preload_index(struct index_state *index,
-                         const struct pathspec *pathspec)
+                         const struct pathspec *pathspec,
+                         unsigned int refresh_flags)
 {
        int threads, i, work, offset;
        struct thread_data data[MAX_PARALLEL];
        uint64_t start = getnanotime();
+       struct progress_data pd;
 
        if (!core_preload_index)
                return;
@@ -93,6 +121,13 @@ static void preload_index(struct index_state *index,
        offset = 0;
        work = DIV_ROUND_UP(index->cache_nr, threads);
        memset(&data, 0, sizeof(data));
+
+       memset(&pd, 0, sizeof(pd));
+       if (refresh_flags & REFRESH_PROGRESS && isatty(2)) {
+               pd.progress = start_delayed_progress(_("Refreshing index"), index->cache_nr);
+               pthread_mutex_init(&pd.mutex, NULL);
+       }
+
        for (i = 0; i < threads; i++) {
                struct thread_data *p = data+i;
                p->index = index;
@@ -100,6 +135,8 @@ static void preload_index(struct index_state *index,
                        copy_pathspec(&p->pathspec, pathspec);
                p->offset = offset;
                p->nr = work;
+               if (pd.progress)
+                       p->progress = &pd;
                offset += work;
                if (pthread_create(&p->pthread, NULL, preload_thread, p))
                        die("unable to create threaded lstat");
@@ -109,15 +146,18 @@ static void preload_index(struct index_state *index,
                if (pthread_join(p->pthread, NULL))
                        die("unable to join threaded lstat");
        }
+       stop_progress(&pd.progress);
+
        trace_performance_since(start, "preload index");
 }
 #endif
 
 int read_index_preload(struct index_state *index,
-                      const struct pathspec *pathspec)
+                      const struct pathspec *pathspec,
+                      unsigned int refresh_flags)
 {
        int retval = read_index(index);
 
-       preload_index(index, pathspec);
+       preload_index(index, pathspec, refresh_flags);
        return retval;
 }