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qapi script: add event support

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qapi-event.py will parse the schema and generate qapi-event.c, then
the API in qapi-event.c can be used to handle events in qemu code.
All API have prefix "qapi_event".

The script mainly includes two parts: generate API for each event
define, generate an enum type for all defined events.

Since in some cases the real emit behavior may change, for example,
qemu-img would not send a event, a callback layer is used to
control the behavior. As a result, the stubs at compile time
can be saved, the binding of block layer code and monitor code
will become looser.

Signed-off-by: Wenchao Xia <wenchaoqemu@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This commit is contained in:
Wenchao Xia 2014-06-18 08:43:28 +02:00 • committed by Luiz Capitulino
parent f882126024
commit 21cd70dfc1
10 changed files with 413 additions and 5 deletions
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12
scripts/qapi.py
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@ -248,6 +248,16 @@ def discriminator_find_enum_define(expr):
return find_enum(discriminator_type)
def check_event(expr, expr_info):
params = expr.get('data')
if params:
for argname, argentry, optional, structured in parse_args(params):
if structured:
raise QAPIExprError(expr_info,
"Nested structure define in event is not "
"supported now, event '%s', argname '%s'"
% (expr['event'], argname))
def check_union(expr, expr_info):
name = expr['union']
base = expr.get('base')
@ -311,6 +321,8 @@ def check_exprs(schema):
expr = expr_elem['expr']
if expr.has_key('union'):
check_union(expr, expr_elem['info'])
if expr.has_key('event'):
check_event(expr, expr_elem['info'])
def parse_schema(input_file):
try: