[OpenSIPS-Devel] [OpenSIPS/opensips] 78c803: core context code: add support for a global proces...

[Liviu Chircu]

  Branch: refs/heads/async
  Home:   https://github.com/OpenSIPS/opensips
  Commit: 78c803566e8a1eaaac4e1a25b2301174cd38824f
      https://github.com/OpenSIPS/opensips/commit/78c803566e8a1eaaac4e1a25b2301174cd38824f
  Author: Liviu Chircu <liviu at opensips.org>
  Date:   2014-12-10 (Wed, 10 Dec 2014)

  Changed paths:
    M context.h
    M main.c
    M modules/tm/t_ctx.c
    M msg_translator.c

  Log Message:
  -----------
  core context code: add support for a global processing context

The newly introduced CONTEXT_GLOBAL represents the current flow of
script execution. It is a more uniform way of handling the majority
of async script usage scenarios.

The initial direction (by simply using CONTEXT_MSG) runs into too many
problems:

    * portions of code where the "current sip_msg" is unavailable
    * concurrency issues (insufficient referencing) due to sip_msg cloning
      logic in tm, which also clones the context, but fails to properly
      count possible additional dialog references

CONTEXT_MSG logic will be removed in a future commit.