Implement very basic grouped fetches of objects from the cloud.

[bluesky.git] / bluesky / log.c

diff --git a/bluesky/log.c b/bluesky/log.c
index ad1dac1..4cef5fd 100644 (file)
--- a/bluesky/log.c
+++ b/bluesky/log.c
@@ -616,8 +616,20 @@ BlueSkyRCStr *bluesky_log_map_object(BlueSkyCloudLog *item, gboolean map_data)
             if (rangeitem == NULL) {
                 g_print("Item at offset 0x%zx not available, need to fetch.\n",
                         file_offset);
-                if (range_request)
-                    cloudlog_partial_fetch_start(map, file_offset, file_size);
+                if (range_request) {
+                    uint64_t start = 0, length = 0, end;
+                    if (map->prefetches != NULL)
+                        bluesky_rangeset_get_extents(map->prefetches,
+                                                     &start, &length);
+                    start = MIN(start, file_offset);
+                    end = MAX(start + length, file_offset + file_size);
+                    length = end - start;
+                    cloudlog_partial_fetch_start(map, start, length);
+                    if (map->prefetches != NULL) {
+                        bluesky_rangeset_free(map->prefetches);
+                        map->prefetches = NULL;
+                    }
+                }
                 g_cond_wait(map->cond, map->lock);
             } else if (rangeitem->start == file_offset
                        && rangeitem->length == file_size) {