hash-arg feature

[tatsuya6502]

• Add the hash-arg feature, which is intended to be used by Moka cache to avoid calculating the same hash repeatedly for a key.
• Add the following public methods to segment::HashMap for hash-arg feature. (These ones with prefix h_ takes hash: u64 as an additional argument):
  • hash
  • h_get
  • h_get_key_value
  • h_insert_with_modify
  • h_remove
  • h_remove_if

[tatsuya6502]

Closing without merging.

For tighter integration between Moka and moka-cht, we have copied relevant source files from moka-cht to moka repository:

• Import cht source files for better integration moka#77

So we do not have to add moka specific feature to moka-cht in this repository.