# 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 _generate_event_api_name(event_name, params):
- api_name = "void qapi_event_send_%s(" % c_name(event_name).lower();
- l = len(api_name)
- if params:
- for m in params.members:
- if m.optional:
- api_name += "bool has_%s,\n" % c_name(m.name)
- api_name += "".ljust(l)
+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, boxed, 'Error **errp')}
- api_name += "%s %s,\n" % (m.type.c_type(is_param=True),
- c_name(m.name))
- api_name += "".ljust(l)
-
- api_name += "Error **errp)"
- return api_name;
+def gen_event_send_decl(name, arg_type, boxed):
+ return mcgen('''
-# Following are the core functions that generate C APIs to emit event.
+%(proto)s;
+''',
+ proto=gen_event_send_proto(name, arg_type, boxed))
-def generate_event_declaration(api_name):
- return mcgen('''
-%(api_name)s;
+# 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;
''',
- api_name = api_name)
+ c_name=typ.c_name())
+ return ret
-def generate_event_implement(api_name, event_name, params):
- # step 1: declare any variables
- ret = mcgen("""
-%(api_name)s
+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
{
QDict *qmp;
- Error *local_err = NULL;
+ Error *err = NULL;
QMPEventFuncEmit emit;
-""",
- api_name = api_name)
+''',
+ proto=gen_event_send_proto(name, arg_type, boxed))
- if params and params.members:
- ret += mcgen("""
- QmpOutputVisitor *qov;
- Visitor *v;
+ if arg_type and not arg_type.is_empty():
+ ret += mcgen('''
QObject *obj;
+ Visitor *v;
+''')
+ if not boxed:
+ ret += gen_param_var(arg_type)
+ else:
+ assert not boxed
-""")
+ ret += mcgen('''
- # step 2: check emit function, create a dict
- ret += mcgen("""
emit = qmp_event_get_func_emit();
if (!emit) {
return;
}
- qmp = qmp_event_build_dict("%(event_name)s");
-
-""",
- event_name = event_name)
+ qmp = qmp_event_build_dict("%(name)s");
- # step 3: visit the params if params != None
- if params and params.members:
- ret += mcgen("""
- qov = qmp_output_visitor_new();
- g_assert(qov);
-
- v = qmp_output_get_visitor(qov);
- g_assert(v);
+''',
+ name=name)
+
+ if arg_type and not arg_type.is_empty():
+ ret += mcgen('''
+ v = qobject_output_visitor_new(&obj);
+''')
+ if not arg_type.is_implicit():
+ ret += mcgen('''
+ visit_type_%(c_name)s(v, "%(name)s", &arg, &err);
+''',
+ name=name, c_name=arg_type.c_name())
+ else:
+ ret += mcgen('''
- /* Fake visit, as if all members are under a structure */
- visit_start_struct(v, NULL, "", "%(event_name)s", 0, &local_err);
- if (local_err) {
- goto clean;
+ visit_start_struct(v, "%(name)s", NULL, 0, &err);
+ if (err) {
+ goto out;
}
-
-""",
- event_name = event_name)
-
- for memb in params.members:
- if memb.optional:
- ret += mcgen("""
- if (has_%(var)s) {
-""",
- var=c_name(memb.name))
- push_indent()
-
- if memb.type.name == "str":
- var_type = "(char **)"
- else:
- var_type = ""
-
- ret += mcgen("""
- visit_type_%(type)s(v, %(var_type)s&%(var)s, "%(name)s", &local_err);
- if (local_err) {
- goto clean;
+ visit_type_%(c_name)s_members(v, ¶m, &err);
+ if (!err) {
+ visit_check_struct(v, &err);
}
-""",
- var_type = var_type,
- var=c_name(memb.name),
- type=memb.type.c_name(),
- name=memb.name)
-
- if memb.optional:
- pop_indent()
- ret += mcgen("""
+ visit_end_struct(v, NULL);
+''',
+ name=name, c_name=arg_type.c_name())
+ ret += mcgen('''
+ if (err) {
+ goto out;
}
-""")
-
- ret += mcgen("""
- visit_end_struct(v, &local_err);
- if (local_err) {
- goto clean;
- }
+ visit_complete(v, &obj);
+ qdict_put_obj(qmp, "data", obj);
+''')
- obj = qmp_output_get_qobject(qov);
- g_assert(obj != NULL);
+ ret += mcgen('''
+ emit(%(c_enum)s, qmp, &err);
- qdict_put_obj(qmp, "data", obj);
-""")
-
- # step 4: call qmp event api
- ret += mcgen("""
- emit(%(event_enum_value)s, qmp, &local_err);
-
-""",
- event_enum_value = c_enum_const(event_enum_name, event_name))
-
- # step 5: clean up
- if params and params.members:
- ret += mcgen("""
- clean:
- qmp_output_visitor_cleanup(qov);
-""")
- ret += mcgen("""
- error_propagate(errp, local_err);
+''',
+ c_enum=c_enum_const(event_enum_name, name))
+
+ if arg_type and not arg_type.is_empty():
+ ret += mcgen('''
+out:
+ visit_free(v);
+''')
+ ret += mcgen('''
+ error_propagate(errp, err);
QDECREF(qmp);
}
-""")
-
+''')
return ret
self._event_names = []
def visit_end(self):
- self.decl += generate_enum(event_enum_name, self._event_names)
- self.defn += generate_enum_lookup(event_enum_name, self._event_names)
+ 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):
- api_name = _generate_event_api_name(name, arg_type)
- self.decl += generate_event_declaration(api_name)
- self.defn += generate_event_implement(api_name, 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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