uint32_t *content_size_loc; /* pointer to current content size */
char *base; /* mmap base address */
ssize_t offset; /* offset from base, in bits. EOF for end of file. */
+ ssize_t last_offset; /* offset before the last read_event */
size_t cur_index; /* current index in packet index */
void (*move_pos_slow)(struct ctf_stream_pos *pos, size_t offset,
int whence); /* function called to switch packet */