# QAPI event generator
#
# Copyright (c) 2014 Wenchao Xia
-# Copyright (c) 2015 Red Hat Inc.
+# Copyright (c) 2015-2016 Red Hat Inc.
#
# Authors:
# Wenchao Xia <wenchaoqemu@gmail.com>
from qapi import *
-def gen_event_send_proto(name, arg_type):
+def gen_event_send_proto(name, arg_type, boxed):
return 'void qapi_event_send_%(c_name)s(%(param)s)' % {
'c_name': c_name(name.lower()),
- 'param': gen_params(arg_type, 'Error **errp')}
+ 'param': gen_params(arg_type, boxed, 'Error **errp')}
-def gen_event_send_decl(name, arg_type):
+def gen_event_send_decl(name, arg_type, boxed):
return mcgen('''
%(proto)s;
''',
- proto=gen_event_send_proto(name, arg_type))
+ proto=gen_event_send_proto(name, arg_type, boxed))
-def gen_event_send(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('''
+
+ };
+''')
+ if not typ.is_implicit():
+ ret += mcgen('''
+ %(c_name)s *arg = ¶m;
+''',
+ c_name=typ.c_name())
+ return ret
+
+
+def gen_event_send(name, arg_type, boxed):
+ # 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
Error *err = NULL;
QMPEventFuncEmit emit;
''',
- proto=gen_event_send_proto(name, arg_type))
+ proto=gen_event_send_proto(name, arg_type, boxed))
- if arg_type and arg_type.members:
+ if arg_type and not arg_type.is_empty():
ret += mcgen('''
- QmpOutputVisitor *qov;
- Visitor *v;
QObject *obj;
-
+ Visitor *v;
''')
+ if not boxed:
+ ret += gen_param_var(arg_type)
+ else:
+ assert not boxed
ret += mcgen('''
+
emit = qmp_event_get_func_emit();
if (!emit) {
return;
''',
name=name)
- if arg_type and arg_type.members:
+ if arg_type and not arg_type.is_empty():
ret += mcgen('''
- qov = qmp_output_visitor_new();
- g_assert(qov);
-
- v = qmp_output_get_visitor(qov);
- g_assert(v);
-
- /* Fake visit, as if all members are under a structure */
- visit_start_struct(v, NULL, "", "%(name)s", 0, &err);
- if (err) {
- goto clean;
- }
-
-''',
- name=name)
-
- for memb in arg_type.members:
- if memb.optional:
- ret += mcgen('''
- if (has_%(c_name)s) {
+ v = qobject_output_visitor_new(&obj);
+''')
+ if not arg_type.is_implicit():
+ ret += mcgen('''
+ visit_type_%(c_name)s(v, "%(name)s", &arg, &err);
''',
- c_name=c_name(memb.name))
- push_indent()
-
- # Ugly: need to cast away the const
- if memb.type.name == "str":
- cast = '(char **)'
- else:
- cast = ''
-
+ name=name, c_name=arg_type.c_name())
+ else:
ret += mcgen('''
- visit_type_%(c_type)s(v, %(cast)s&%(c_name)s, "%(name)s", &err);
+
+ visit_start_struct(v, "%(name)s", NULL, 0, &err);
if (err) {
- goto clean;
+ goto out;
}
-''',
- cast=cast,
- c_name=c_name(memb.name),
- c_type=memb.type.c_name(),
- name=memb.name)
-
- if memb.optional:
- pop_indent()
- ret += mcgen('''
+ visit_type_%(c_name)s_members(v, ¶m, &err);
+ if (!err) {
+ visit_check_struct(v, &err);
}
-''')
-
+ visit_end_struct(v, NULL);
+''',
+ name=name, c_name=arg_type.c_name())
ret += mcgen('''
-
- visit_end_struct(v, &err);
if (err) {
- goto clean;
+ goto out;
}
- obj = qmp_output_get_qobject(qov);
- g_assert(obj != NULL);
-
+ visit_complete(v, &obj);
qdict_put_obj(qmp, "data", obj);
''')
''',
c_enum=c_enum_const(event_enum_name, name))
- if arg_type and arg_type.members:
+ if arg_type and not arg_type.is_empty():
ret += mcgen('''
- clean:
- qmp_output_visitor_cleanup(qov);
+out:
+ visit_free(v);
''')
ret += mcgen('''
error_propagate(errp, err);
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)
+ def visit_event(self, name, info, arg_type, boxed):
+ self.decl += gen_event_send_decl(name, arg_type, boxed)
+ self.defn += gen_event_send(name, arg_type, boxed)
self._event_names.append(name)
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/qobject-output-visitor.h"
#include "qapi/qmp-event.h"
''',
''',
prefix=prefix))
-event_enum_name = c_name(prefix + "QAPIEvent", protect=False)
+event_enum_name = c_name(prefix + 'QAPIEvent', protect=False)
schema = QAPISchema(input_file)
gen = QAPISchemaGenEventVisitor()
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