Return the offset in data_ just past the end of the current entry.

Creates a logger that writes to the given file. The PosixLogger instance takes ownership of the file handle.

mmap_base[0, length-1] points to the memory-mapped contents of the file. It must be the result of a successful call to mmap(). This instances takes ov

The new instance takes ownership of |fd|. |fd_limiter| must outlive this instance, and will be used to determine if .

Remove all cache entries that are not actively in use. Memory-constrained applications may wish to call this method to reduce memory usage. Default i

Convenience methods

Picks the number of bytes that can be read until a compaction is scheduled.