[Qemu-devel] [RFC PATCH V3 0/5] add direct support of event in qapi schema

[Wenchao Xia <wenchaoqemu@gmail.com>]

This series add support for tag/keyword 'event' in qapi-schema.
A new file was created to store some helper functions in patch 2, patch 4 is
the test case, patch 5 is a convert example.

The implemention is done by generate API and a batch of parameters for each
event define, it doesn't generate a struture and visit function in the
background for every event, so it doesn't support nested structure in the
define to avoid trouble. A callback layer is added to control the behavior.
More detail can be found in patch 3's message and incode comments.

v2:
  Address Luiz's comments:
  patch 3: rename *err to *local_err, do not initialize *qmp = NULL, create
a new function qmp_build_evet_dict().
  Other change:
  reorgnized script in patch 3, it have a clear three steps, see patch 3's
incode comments.

v3:
  Address Luiz's comments:
  2/5: use -1 when fail to get host timestamp.
  3/5: typo fix and better incode comments. all unchanged functions are moved
into qmp-event.c, from generated file. To do so without include issue, 'int'
was used intead of 'enum' in function prototype declaration, since the 'enum'
define is a generated type.
  Address Eric's comments:
  2/5: use -1 when fail to get host timestamp.
  3/5: typo fix, add docs/qapi-code-gen.txt.
  4/5: typo fix, verify no other fields in member 'timestamp'.
  5/5: add doc in qapi-schema.json.
  fix license, all script using GPL2, all C code use LGPL, just as other
similar files in upstream.

Wenchao Xia (5):
  1 os-posix: include sys/time.h
  2 qapi: add event helper functions
  3 qapi script: add event support
  4 test: add test cases for qapi event
  5 qapi event: convert RTC_CHANGE

 Makefile                                |    9 +-
 Makefile.objs                           |    2 +-
 docs/qapi-code-gen.txt                  |   18 ++
 include/qapi/qmp-event.h                |   25 ++
 include/sysemu/os-posix.h               |    2 +
 monitor.c                               |   15 ++
 qapi-schema.json                        |   13 +
 qapi/Makefile.objs                      |    1 +
 qapi/qmp-event.c                        |   71 ++++++
 scripts/qapi-event.py                   |  373 +++++++++++++++++++++++++++++++
 tests/Makefile                          |   14 +-
 tests/qapi-schema/qapi-schema-test.json |   12 +
 tests/qapi-schema/qapi-schema-test.out  |   10 +-
 tests/test-qmp-event.c                  |  258 +++++++++++++++++++++
 vl.c                                    |    7 +-
 15 files changed, 816 insertions(+), 14 deletions(-)
 create mode 100644 include/qapi/qmp-event.h
 create mode 100644 qapi/qmp-event.c
 create mode 100644 scripts/qapi-event.py
 create mode 100644 tests/test-qmp-event.c