Port fix: Windows does not allow read-only mappings > file's size

[babeltrace.git] / plugins / ctf / fs-src / data-stream-file.c

diff --git a/plugins/ctf/fs-src/data-stream-file.c b/plugins/ctf/fs-src/data-stream-file.c
index 76ea9ad502939758176908b41e15c09a54650901..bae0bd14bdda1eca1a9849500c582412944c7b87 100644 (file)
--- a/plugins/ctf/fs-src/data-stream-file.c
+++ b/plugins/ctf/fs-src/data-stream-file.c
@@ -92,6 +92,11 @@ enum bt_ctf_notif_iter_medium_status ds_file_mmap_next(
                        goto error;
                }
 
+               /*
+                * mmap_valid_len is guaranteed to be page-aligned except on the
+                * last mapping where it may not be possible (since the file's
+                * size itself may not be a page multiple).
+                */
                ds_file->mmap_offset += ds_file->mmap_valid_len;
                ds_file->request_offset = 0;
        }