Making each visitor provide its own (awkwardly-named) FOO_cleanup() is unusual, when we can instead have a polymorphic visit_free() interface. Over the next few patches, we can use the polymorphic functions to eliminate the need for a FOO_get_visitor() function for accessing specific visitor functionality, once everything can be accessed directly through the Visitor* interfaces. The dealloc visitor is the first one converted to completely use the new entry point, since qapi_dealloc_visitor_cleanup() was the only reason that qapi_dealloc_get_visitor() existed, and only generated and testsuite code was even using it. With the new visit_free() entry point in place, we no longer need to expose the QapiDeallocVisitor subtype through qapi_dealloc_visitor_new(), and can get by with less generated code, with diffs that look like: | void qapi_free_ACPIOSTInfo(ACPIOSTInfo *obj) | { |- QapiDeallocVisitor *qdv; | Visitor *v; | | if (!obj) { | return; | } | |- qdv = qapi_dealloc_visitor_new(); |- v = qapi_dealloc_get_visitor(qdv); |+ v = qapi_dealloc_visitor_new(); | visit_type_ACPIOSTInfo(v, NULL, &obj, NULL); |- qapi_dealloc_visitor_cleanup(qdv); |+ visit_free(v); |} Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1465490926-28625-5-git-send-email-eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
217 lines
5.1 KiB
Python
217 lines
5.1 KiB
Python
#
|
|
# QAPI event generator
|
|
#
|
|
# Copyright (c) 2014 Wenchao Xia
|
|
# Copyright (c) 2015-2016 Red Hat Inc.
|
|
#
|
|
# Authors:
|
|
# Wenchao Xia <wenchaoqemu@gmail.com>
|
|
# Markus Armbruster <armbru@redhat.com>
|
|
#
|
|
# This work is licensed under the terms of the GNU GPL, version 2.
|
|
# See the COPYING file in the top-level directory.
|
|
|
|
from qapi import *
|
|
|
|
|
|
def gen_event_send_proto(name, arg_type):
|
|
return 'void qapi_event_send_%(c_name)s(%(param)s)' % {
|
|
'c_name': c_name(name.lower()),
|
|
'param': gen_params(arg_type, 'Error **errp')}
|
|
|
|
|
|
def gen_event_send_decl(name, arg_type):
|
|
return mcgen('''
|
|
|
|
%(proto)s;
|
|
''',
|
|
proto=gen_event_send_proto(name, arg_type))
|
|
|
|
|
|
# Declare and initialize an object 'qapi' using parameters from gen_params()
|
|
def gen_param_var(typ):
|
|
assert not typ.variants
|
|
ret = mcgen('''
|
|
%(c_name)s param = {
|
|
''',
|
|
c_name=typ.c_name())
|
|
sep = ' '
|
|
for memb in typ.members:
|
|
ret += sep
|
|
sep = ', '
|
|
if memb.optional:
|
|
ret += 'has_' + c_name(memb.name) + sep
|
|
if memb.type.name == 'str':
|
|
# Cast away const added in gen_params()
|
|
ret += '(char *)'
|
|
ret += c_name(memb.name)
|
|
ret += mcgen('''
|
|
|
|
};
|
|
''')
|
|
return ret
|
|
|
|
|
|
def gen_event_send(name, arg_type):
|
|
# FIXME: Our declaration of local variables (and of 'errp' in the
|
|
# parameter list) can collide with exploded members of the event's
|
|
# data type passed in as parameters. If this collision ever hits in
|
|
# practice, we can rename our local variables with a leading _ prefix,
|
|
# or split the code into a wrapper function that creates a boxed
|
|
# 'param' object then calls another to do the real work.
|
|
ret = mcgen('''
|
|
|
|
%(proto)s
|
|
{
|
|
QDict *qmp;
|
|
Error *err = NULL;
|
|
QMPEventFuncEmit emit;
|
|
''',
|
|
proto=gen_event_send_proto(name, arg_type))
|
|
|
|
if arg_type and arg_type.members:
|
|
ret += mcgen('''
|
|
QmpOutputVisitor *qov;
|
|
Visitor *v;
|
|
''')
|
|
ret += gen_param_var(arg_type)
|
|
|
|
ret += mcgen('''
|
|
|
|
emit = qmp_event_get_func_emit();
|
|
if (!emit) {
|
|
return;
|
|
}
|
|
|
|
qmp = qmp_event_build_dict("%(name)s");
|
|
|
|
''',
|
|
name=name)
|
|
|
|
if arg_type and arg_type.members:
|
|
ret += mcgen('''
|
|
qov = qmp_output_visitor_new();
|
|
v = qmp_output_get_visitor(qov);
|
|
|
|
visit_start_struct(v, "%(name)s", NULL, 0, &err);
|
|
if (err) {
|
|
goto out;
|
|
}
|
|
visit_type_%(c_name)s_members(v, ¶m, &err);
|
|
if (!err) {
|
|
visit_check_struct(v, &err);
|
|
}
|
|
visit_end_struct(v, NULL);
|
|
if (err) {
|
|
goto out;
|
|
}
|
|
|
|
qdict_put_obj(qmp, "data", qmp_output_get_qobject(qov));
|
|
''',
|
|
name=name, c_name=arg_type.c_name())
|
|
|
|
ret += mcgen('''
|
|
emit(%(c_enum)s, qmp, &err);
|
|
|
|
''',
|
|
c_enum=c_enum_const(event_enum_name, name))
|
|
|
|
if arg_type and arg_type.members:
|
|
ret += mcgen('''
|
|
out:
|
|
visit_free(v);
|
|
''')
|
|
ret += mcgen('''
|
|
error_propagate(errp, err);
|
|
QDECREF(qmp);
|
|
}
|
|
''')
|
|
return ret
|
|
|
|
|
|
class QAPISchemaGenEventVisitor(QAPISchemaVisitor):
|
|
def __init__(self):
|
|
self.decl = None
|
|
self.defn = None
|
|
self._event_names = None
|
|
|
|
def visit_begin(self, schema):
|
|
self.decl = ''
|
|
self.defn = ''
|
|
self._event_names = []
|
|
|
|
def visit_end(self):
|
|
self.decl += gen_enum(event_enum_name, self._event_names)
|
|
self.defn += gen_enum_lookup(event_enum_name, self._event_names)
|
|
self._event_names = None
|
|
|
|
def visit_event(self, name, info, arg_type):
|
|
self.decl += gen_event_send_decl(name, arg_type)
|
|
self.defn += gen_event_send(name, arg_type)
|
|
self._event_names.append(name)
|
|
|
|
|
|
(input_file, output_dir, do_c, do_h, prefix, dummy) = parse_command_line()
|
|
|
|
c_comment = '''
|
|
/*
|
|
* schema-defined QAPI event functions
|
|
*
|
|
* Copyright (c) 2014 Wenchao Xia
|
|
*
|
|
* Authors:
|
|
* Wenchao Xia <wenchaoqemu@gmail.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
|
|
* See the COPYING.LIB file in the top-level directory.
|
|
*
|
|
*/
|
|
'''
|
|
h_comment = '''
|
|
/*
|
|
* schema-defined QAPI event functions
|
|
*
|
|
* Copyright (c) 2014 Wenchao Xia
|
|
*
|
|
* Authors:
|
|
* Wenchao Xia <wenchaoqemu@gmail.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
|
|
* See the COPYING.LIB file in the top-level directory.
|
|
*
|
|
*/
|
|
'''
|
|
|
|
(fdef, fdecl) = open_output(output_dir, do_c, do_h, prefix,
|
|
'qapi-event.c', 'qapi-event.h',
|
|
c_comment, h_comment)
|
|
|
|
fdef.write(mcgen('''
|
|
#include "qemu/osdep.h"
|
|
#include "qemu-common.h"
|
|
#include "%(prefix)sqapi-event.h"
|
|
#include "%(prefix)sqapi-visit.h"
|
|
#include "qapi/qmp-output-visitor.h"
|
|
#include "qapi/qmp-event.h"
|
|
|
|
''',
|
|
prefix=prefix))
|
|
|
|
fdecl.write(mcgen('''
|
|
#include "qapi/error.h"
|
|
#include "qapi/qmp/qdict.h"
|
|
#include "%(prefix)sqapi-types.h"
|
|
|
|
''',
|
|
prefix=prefix))
|
|
|
|
event_enum_name = c_name(prefix + "QAPIEvent", protect=False)
|
|
|
|
schema = QAPISchema(input_file)
|
|
gen = QAPISchemaGenEventVisitor()
|
|
schema.visit(gen)
|
|
fdef.write(gen.defn)
|
|
fdecl.write(gen.decl)
|
|
|
|
close_output(fdef, fdecl)
|