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1 #
2 # QAPI event generator
3 #
4 # Copyright (c) 2014 Wenchao Xia
5 # Copyright (c) 2015-2016 Red Hat Inc.
6 #
7 # Authors:
8 # Wenchao Xia <wenchaoqemu@gmail.com>
9 # Markus Armbruster <armbru@redhat.com>
10 #
11 # This work is licensed under the terms of the GNU GPL, version 2.
12 # See the COPYING file in the top-level directory.
13
14 from qapi import *
15
16
17 def gen_event_send_proto(name, arg_type):
18 return 'void qapi_event_send_%(c_name)s(%(param)s)' % {
19 'c_name': c_name(name.lower()),
20 'param': gen_params(arg_type, 'Error **errp')}
21
22
23 def gen_event_send_decl(name, arg_type):
24 return mcgen('''
25
26 %(proto)s;
27 ''',
28 proto=gen_event_send_proto(name, arg_type))
29
30
31 def gen_event_send(name, arg_type):
32 ret = mcgen('''
33
34 %(proto)s
35 {
36 QDict *qmp;
37 Error *err = NULL;
38 QMPEventFuncEmit emit;
39 ''',
40 proto=gen_event_send_proto(name, arg_type))
41
42 if arg_type and arg_type.members:
43 ret += mcgen('''
44 QmpOutputVisitor *qov;
45 Visitor *v;
46 QObject *obj;
47
48 ''')
49
50 ret += mcgen('''
51 emit = qmp_event_get_func_emit();
52 if (!emit) {
53 return;
54 }
55
56 qmp = qmp_event_build_dict("%(name)s");
57
58 ''',
59 name=name)
60
61 if arg_type and arg_type.members:
62 ret += mcgen('''
63 qov = qmp_output_visitor_new();
64 v = qmp_output_get_visitor(qov);
65
66 visit_start_struct(v, "%(name)s", NULL, 0, &err);
67 ''',
68 name=name)
69 ret += gen_err_check()
70 ret += gen_visit_fields(arg_type.members, need_cast=True,
71 label='out_obj')
72 ret += mcgen('''
73 out_obj:
74 visit_end_struct(v, err ? NULL : &err);
75 if (err) {
76 goto out;
77 }
78
79 obj = qmp_output_get_qobject(qov);
80 g_assert(obj);
81
82 qdict_put_obj(qmp, "data", obj);
83 ''')
84
85 ret += mcgen('''
86 emit(%(c_enum)s, qmp, &err);
87
88 ''',
89 c_enum=c_enum_const(event_enum_name, name))
90
91 if arg_type and arg_type.members:
92 ret += mcgen('''
93 out:
94 qmp_output_visitor_cleanup(qov);
95 ''')
96 ret += mcgen('''
97 error_propagate(errp, err);
98 QDECREF(qmp);
99 }
100 ''')
101 return ret
102
103
104 class QAPISchemaGenEventVisitor(QAPISchemaVisitor):
105 def __init__(self):
106 self.decl = None
107 self.defn = None
108 self._event_names = None
109
110 def visit_begin(self, schema):
111 self.decl = ''
112 self.defn = ''
113 self._event_names = []
114
115 def visit_end(self):
116 self.decl += gen_enum(event_enum_name, self._event_names)
117 self.defn += gen_enum_lookup(event_enum_name, self._event_names)
118 self._event_names = None
119
120 def visit_event(self, name, info, arg_type):
121 self.decl += gen_event_send_decl(name, arg_type)
122 self.defn += gen_event_send(name, arg_type)
123 self._event_names.append(name)
124
125
126 (input_file, output_dir, do_c, do_h, prefix, dummy) = parse_command_line()
127
128 c_comment = '''
129 /*
130 * schema-defined QAPI event functions
131 *
132 * Copyright (c) 2014 Wenchao Xia
133 *
134 * Authors:
135 * Wenchao Xia <wenchaoqemu@gmail.com>
136 *
137 * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
138 * See the COPYING.LIB file in the top-level directory.
139 *
140 */
141 '''
142 h_comment = '''
143 /*
144 * schema-defined QAPI event functions
145 *
146 * Copyright (c) 2014 Wenchao Xia
147 *
148 * Authors:
149 * Wenchao Xia <wenchaoqemu@gmail.com>
150 *
151 * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
152 * See the COPYING.LIB file in the top-level directory.
153 *
154 */
155 '''
156
157 (fdef, fdecl) = open_output(output_dir, do_c, do_h, prefix,
158 'qapi-event.c', 'qapi-event.h',
159 c_comment, h_comment)
160
161 fdef.write(mcgen('''
162 #include "qemu-common.h"
163 #include "%(prefix)sqapi-event.h"
164 #include "%(prefix)sqapi-visit.h"
165 #include "qapi/qmp-output-visitor.h"
166 #include "qapi/qmp-event.h"
167
168 ''',
169 prefix=prefix))
170
171 fdecl.write(mcgen('''
172 #include "qapi/error.h"
173 #include "qapi/qmp/qdict.h"
174 #include "%(prefix)sqapi-types.h"
175
176 ''',
177 prefix=prefix))
178
179 event_enum_name = c_name(prefix + "QAPIEvent", protect=False)
180
181 schema = QAPISchema(input_file)
182 gen = QAPISchemaGenEventVisitor()
183 schema.visit(gen)
184 fdef.write(gen.defn)
185 fdecl.write(gen.decl)
186
187 close_output(fdef, fdecl)