[Tarantool-patches] [PATCH v10 0/4] box/cbox: implement cfunc Lua module

[Cyrill Gorcunov <gorcunov@gmail.com>]

The cbox module provide a way to execute C stored procedures
on read only nodes without registering them in `_func` system space.

The series implements a bare minimum. Vlad, please take a look
once time permit. The issue with `call` simplification where
we plan to drop `tarantooL` will be addressed in another issue
which I already assigned to myself.

v1-v3 are development ones and not sent.

v5 (by vlad):
 - drop exists, list methods: they are redundant
 - rename cfunc to cbox
 - when create a function make it callable Lua object
 - initialize cbox out of modules
 - fix error in passing module name for reloading
 - make api been cbox.func.[create|drop] and
   cbox.module.reload
 - fix test for OSX sake

v6 (by vlad):
 - move module handling into module_cache file.
v7:
 - development
v8:
 - use rbtree for function instance storage, since
   i don't like the idea of unexpected rehashing of
   values in case of massive number of functions
   allocated
 - use reference counter and free function instance
   if only load/unload are coupled
 - keep a pointer to the function inside Lua object
   so we don't need to lookup on every function call.
   this force us to implement __gc method
 - use new API and update docs
v9:
 - development
v10:
 - use hashes for function names lookup
 - simply function loads counting
 - use luaL_register_module and luaL_register_type for
   easier methods registering
 - carry functions as userdata object

branch gorcunov/gh-4642-func-ro-10
issue https://github.com/tarantool/tarantool/issues/4642

Cyrill Gorcunov (4):
  box/func: factor out c function entry structure
  module_cache: move module handling into own subsystem
  box/cbox: implement cbox Lua module
  test: box/cfunc -- add simple module test

 src/box/CMakeLists.txt  |   2 +
 src/box/box.cc          |   2 +-
 src/box/func.c          | 476 +--------------------------------------
 src/box/func.h          |  41 +---
 src/box/func_def.h      |  14 --
 src/box/lua/cbox.c      | 443 ++++++++++++++++++++++++++++++++++++
 src/box/lua/cbox.h      |  24 ++
 src/box/lua/init.c      |   2 +
 src/box/module_cache.c  | 484 ++++++++++++++++++++++++++++++++++++++++
 src/box/module_cache.h  | 158 +++++++++++++
 test/box/CMakeLists.txt |   2 +
 test/box/cbox.result    | 148 ++++++++++++
 test/box/cbox.test.lua  |  55 +++++
 test/box/cfunc1.c       |  58 +++++
 test/box/cfunc2.c       | 132 +++++++++++
 test/box/suite.ini      |   2 +-
 16 files changed, 1520 insertions(+), 523 deletions(-)
 create mode 100644 src/box/lua/cbox.c
 create mode 100644 src/box/lua/cbox.h
 create mode 100644 src/box/module_cache.c
 create mode 100644 src/box/module_cache.h
 create mode 100644 test/box/cbox.result
 create mode 100644 test/box/cbox.test.lua
 create mode 100644 test/box/cfunc1.c
 create mode 100644 test/box/cfunc2.c


base-commit: bc6caac60d5ef070460374149cb7abe2b0db3cde
-- 
2.26.2