diff options
Diffstat (limited to 'scripts/qapi-event.py')
| -rw-r--r-- | scripts/qapi-event.py | 235 |
1 files changed, 81 insertions, 154 deletions
diff --git a/scripts/qapi-event.py b/scripts/qapi-event.py index 7f238df5b2..d15fad98f3 100644 --- a/scripts/qapi-event.py +++ b/scripts/qapi-event.py @@ -2,78 +2,64 @@ # QAPI event generator # # Copyright (c) 2014 Wenchao Xia +# Copyright (c) 2015 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 ordereddict import OrderedDict 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 argname, argentry, optional in parse_args(params): - if optional: - api_name += "bool has_%s,\n" % c_name(argname) - api_name += "".ljust(l) +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')} - api_name += "%s %s,\n" % (c_type(argentry, is_param=True), - c_name(argname)) - api_name += "".ljust(l) - api_name += "Error **errp)" - return api_name; - - -# Following are the core functions that generate C APIs to emit event. - -def generate_event_declaration(api_name): +def gen_event_send_decl(name, arg_type): return mcgen(''' -%(api_name)s; +%(proto)s; ''', - api_name = api_name) + proto=gen_event_send_proto(name, arg_type)) -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): + ret = mcgen(''' + +%(proto)s { QDict *qmp; Error *local_err = NULL; QMPEventFuncEmit emit; -""", - api_name = api_name) +''', + proto=gen_event_send_proto(name, arg_type)) - if params: - ret += mcgen(""" + if arg_type and arg_type.members: + ret += mcgen(''' QmpOutputVisitor *qov; Visitor *v; QObject *obj; -""") +''') - # step 2: check emit function, create a dict - ret += mcgen(""" + ret += mcgen(''' emit = qmp_event_get_func_emit(); if (!emit) { return; } - qmp = qmp_event_build_dict("%(event_name)s"); + qmp = qmp_event_build_dict("%(name)s"); -""", - event_name = event_name) +''', + name=name) - # step 3: visit the params if params != None - if params: - ret += mcgen(""" + if arg_type and arg_type.members: + ret += mcgen(''' qov = qmp_output_visitor_new(); g_assert(qov); @@ -81,45 +67,46 @@ def generate_event_implement(api_name, event_name, params): g_assert(v); /* Fake visit, as if all members are under a structure */ - visit_start_struct(v, NULL, "", "%(event_name)s", 0, &local_err); + visit_start_struct(v, NULL, "", "%(name)s", 0, &local_err); if (local_err) { goto clean; } -""", - event_name = event_name) +''', + name=name) - for argname, argentry, optional in parse_args(params): - if optional: - ret += mcgen(""" - if (has_%(var)s) { -""", - var = c_name(argname)) + for memb in arg_type.members: + if memb.optional: + ret += mcgen(''' + if (has_%(c_name)s) { +''', + c_name=c_name(memb.name)) push_indent() - if argentry == "str": - var_type = "(char **)" + # Ugly: need to cast away the const + if memb.type.name == "str": + cast = '(char **)' else: - var_type = "" + cast = '' - ret += mcgen(""" - visit_type_%(type)s(v, %(var_type)s&%(var)s, "%(name)s", &local_err); + ret += mcgen(''' + visit_type_%(c_type)s(v, %(cast)s&%(c_name)s, "%(name)s", &local_err); if (local_err) { goto clean; } -""", - var_type = var_type, - var = c_name(argname), - type = type_name(argentry), - name = argname) +''', + cast=cast, + c_name=c_name(memb.name), + c_type=memb.type.c_name(), + name=memb.name) - if optional: + if memb.optional: pop_indent() - ret += mcgen(""" + ret += mcgen(''' } -""") +''') - ret += mcgen(""" + ret += mcgen(''' visit_end_struct(v, &local_err); if (local_err) { @@ -130,85 +117,48 @@ def generate_event_implement(api_name, event_name, params): g_assert(obj != NULL); qdict_put_obj(qmp, "data", obj); -""") +''') - # step 4: call qmp event api - ret += mcgen(""" - emit(%(event_enum_value)s, qmp, &local_err); + ret += mcgen(''' + emit(%(c_enum)s, qmp, &local_err); -""", - event_enum_value = event_enum_value) +''', + c_enum=c_enum_const(event_enum_name, name)) - # step 5: clean up - if params: - ret += mcgen(""" + if arg_type and arg_type.members: + ret += mcgen(''' clean: qmp_output_visitor_cleanup(qov); -""") - ret += mcgen(""" +''') + ret += mcgen(''' error_propagate(errp, local_err); QDECREF(qmp); } -""") - +''') return ret -# Following are the functions that generate an enum type for all defined -# events, similar to qapi-types.py. Here we already have enum name and -# values which were generated before and recorded in event_enum_*. It also -# works around the issue that "import qapi-types" can't work. - -def generate_event_enum_decl(event_enum_name, event_enum_values): - lookup_decl = mcgen(''' - -extern const char *%(event_enum_name)s_lookup[]; -''', - event_enum_name = event_enum_name) - - enum_decl = mcgen(''' -typedef enum %(event_enum_name)s { -''', - event_enum_name = event_enum_name) - - # append automatically generated _MAX value - enum_max_value = c_enum_const(event_enum_name, "MAX") - enum_values = event_enum_values + [ enum_max_value ] - - i = 0 - for value in enum_values: - enum_decl += mcgen(''' - %(value)s = %(i)d, -''', - value = value, - i = i) - i += 1 - - enum_decl += mcgen(''' -} %(event_enum_name)s; -''', - event_enum_name = event_enum_name) - - return lookup_decl + enum_decl +class QAPISchemaGenEventVisitor(QAPISchemaVisitor): + def __init__(self): + self.decl = None + self.defn = None + self._event_names = None -def generate_event_enum_lookup(event_enum_name, event_enum_strings): - ret = mcgen(''' + def visit_begin(self, schema): + self.decl = '' + self.defn = '' + self._event_names = [] -const char *%(event_enum_name)s_lookup[] = { -''', - event_enum_name = event_enum_name) + 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 - for string in event_enum_strings: - ret += mcgen(''' - "%(string)s", -''', - string = string) + 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) - ret += mcgen(''' - NULL, -}; -''') - return ret (input_file, output_dir, do_c, do_h, prefix, dummy) = parse_command_line() @@ -263,35 +213,12 @@ fdecl.write(mcgen(''' ''', prefix=prefix)) -exprs = parse_schema(input_file) - event_enum_name = c_name(prefix + "QAPIEvent", protect=False) -event_enum_values = [] -event_enum_strings = [] - -for expr in exprs: - if expr.has_key('event'): - event_name = expr['event'] - params = expr.get('data') - if params and len(params) == 0: - params = None - - api_name = _generate_event_api_name(event_name, params) - ret = generate_event_declaration(api_name) - fdecl.write(ret) - - # We need an enum value per event - event_enum_value = c_enum_const(event_enum_name, event_name) - ret = generate_event_implement(api_name, event_name, params) - fdef.write(ret) - - # Record it, and generate enum later - event_enum_values.append(event_enum_value) - event_enum_strings.append(event_name) - -ret = generate_event_enum_decl(event_enum_name, event_enum_values) -fdecl.write(ret) -ret = generate_event_enum_lookup(event_enum_name, event_enum_strings) -fdef.write(ret) + +schema = QAPISchema(input_file) +gen = QAPISchemaGenEventVisitor() +schema.visit(gen) +fdef.write(gen.defn) +fdecl.write(gen.decl) close_output(fdef, fdecl) |