[Qemu-devel] [QAPI+QGA 2/3] QAPI code generation infrastructure

[Michael Roth <mdroth@linux.vnet.ibm.com>]

This is Set 2/3 of the QAPI+QGA patchsets.

These patches apply on top of qapi-backport-set1-v1, and can also be obtained
from:
git://repo.or.cz/qemu/mdroth.git qapi-backport-set2-v1

(Set1+2 are a backport of some of the QAPI-related work from Anthony's
glib tree. The main goal is to get the basic code generation infrastructure in
place so that it can be used by the guest agent to implement a QMP-like guest
interface, and so that future work regarding the QMP conversion to QAPI can be
decoupled from the infrastructure bits. Set3 is the Qemu Guest Agent
(virtagent), rebased on the new code QAPI code generation infrastructure. This
is the first user of QAPI, QMP will follow.)
___

This patchset introduces the following:

 - Hard dependency on GLib. This has been floating around the list for a while.
   Currently the only users are the unit tests for this patchset and the guest
   agent. We can make both of these a configure option, but based on previous
   discussions a hard dependency will likely be introduced with subsequent
   QAPI patches.

 - A couple additional qlist utility functions used by QAPI.

 - QAPI schema-based code generation for synchronous QMP/QGA commands
   and types, and Visiter/dispatch infrastructure to handle
   marshaling/unmarshaling/dispatch between QAPI and the QMP/QGA wire protocols.

 - Documentation and unit tests for visiter functions and synchronous
   command/type generation.

CHANGES SINCE V0 ("QAPI Infrastructure Round 1"):

 - Fixed known memory leaks in generated code
 - Stricter error-handling in generated code
 - Removed currently unused code (generators for events and async/proxied
   QMP/QGA commands and definition used by the not-yet-introduced QMP server
   replacement)
 - Added documentation for code generation scripts/schemas/usage
 - Addressed review comments from Luiz and Stefan

 Makefile                    |   21 ++
 Makefile.objs               |    9 +
 Makefile.target             |    1 +
 configure                   |   13 ++
 docs/qapi-code-gen.txt      |  315 +++++++++++++++++++++++++++++
 module.h                    |    2 +
 qapi-schema-test.json       |   16 ++
 qapi/qapi-dealloc-visiter.c |  127 ++++++++++++
 qapi/qapi-dealloc-visiter.h |   26 +++
 qapi/qapi-types-core.h      |   21 ++
 qapi/qapi-visit-core.h      |  187 +++++++++++++++++
 qapi/qmp-core.h             |   43 ++++
 qapi/qmp-dispatch.c         |   73 +++++++
 qapi/qmp-input-visiter.c    |  239 ++++++++++++++++++++++
 qapi/qmp-input-visiter.h    |   26 +++
 qapi/qmp-output-visiter.c   |  180 +++++++++++++++++
 qapi/qmp-output-visiter.h   |   27 +++
 qapi/qmp-registry.c         |   27 +++
 qlist.h                     |   11 +
 scripts/ordereddict.py      |  128 ++++++++++++
 scripts/qapi-commands.py    |  464 +++++++++++++++++++++++++++++++++++++++++++
 scripts/qapi-types.py       |  217 ++++++++++++++++++++
 scripts/qapi-visit.py       |  219 ++++++++++++++++++++
 scripts/qapi.py             |  181 +++++++++++++++++
 test-qmp-commands.c         |  113 +++++++++++
 test-visiter.c              |  214 ++++++++++++++++++++
 26 files changed, 2900 insertions(+), 0 deletions(-)