mirror of
https://github.com/xemu-project/xemu.git
synced 2024-12-13 23:08:57 +00:00
086ee7a620
The gen_ prefix is awkward. Generated C should go through cgen()
exactly once (see commit 1f9a7a1
). The common way to get this wrong is
passing a foo=gen_foo() keyword argument to mcgen(). I'd like us to
adopt a naming convention where gen_ means "something that's been piped
through cgen(), and thus must not be passed to cgen() or mcgen()".
Requires renaming gen_params(), gen_marshal_proto() and
gen_event_send_proto().
Suggested-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20170601124143.10915-1-marcandre.lureau@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
324 lines
7.4 KiB
Python
324 lines
7.4 KiB
Python
#
|
|
# QAPI command marshaller generator
|
|
#
|
|
# Copyright IBM, Corp. 2011
|
|
# Copyright (C) 2014-2016 Red Hat, Inc.
|
|
#
|
|
# Authors:
|
|
# Anthony Liguori <aliguori@us.ibm.com>
|
|
# Michael Roth <mdroth@linux.vnet.ibm.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_command_decl(name, arg_type, boxed, ret_type):
|
|
return mcgen('''
|
|
%(c_type)s qmp_%(c_name)s(%(params)s);
|
|
''',
|
|
c_type=(ret_type and ret_type.c_type()) or 'void',
|
|
c_name=c_name(name),
|
|
params=build_params(arg_type, boxed, 'Error **errp'))
|
|
|
|
|
|
def gen_call(name, arg_type, boxed, ret_type):
|
|
ret = ''
|
|
|
|
argstr = ''
|
|
if boxed:
|
|
assert arg_type and not arg_type.is_empty()
|
|
argstr = '&arg, '
|
|
elif arg_type:
|
|
assert not arg_type.variants
|
|
for memb in arg_type.members:
|
|
if memb.optional:
|
|
argstr += 'arg.has_%s, ' % c_name(memb.name)
|
|
argstr += 'arg.%s, ' % c_name(memb.name)
|
|
|
|
lhs = ''
|
|
if ret_type:
|
|
lhs = 'retval = '
|
|
|
|
ret = mcgen('''
|
|
|
|
%(lhs)sqmp_%(c_name)s(%(args)s&err);
|
|
''',
|
|
c_name=c_name(name), args=argstr, lhs=lhs)
|
|
if ret_type:
|
|
ret += mcgen('''
|
|
if (err) {
|
|
goto out;
|
|
}
|
|
|
|
qmp_marshal_output_%(c_name)s(retval, ret, &err);
|
|
''',
|
|
c_name=ret_type.c_name())
|
|
return ret
|
|
|
|
|
|
def gen_marshal_output(ret_type):
|
|
return mcgen('''
|
|
|
|
static void qmp_marshal_output_%(c_name)s(%(c_type)s ret_in, QObject **ret_out, Error **errp)
|
|
{
|
|
Error *err = NULL;
|
|
Visitor *v;
|
|
|
|
v = qobject_output_visitor_new(ret_out);
|
|
visit_type_%(c_name)s(v, "unused", &ret_in, &err);
|
|
if (!err) {
|
|
visit_complete(v, ret_out);
|
|
}
|
|
error_propagate(errp, err);
|
|
visit_free(v);
|
|
v = qapi_dealloc_visitor_new();
|
|
visit_type_%(c_name)s(v, "unused", &ret_in, NULL);
|
|
visit_free(v);
|
|
}
|
|
''',
|
|
c_type=ret_type.c_type(), c_name=ret_type.c_name())
|
|
|
|
|
|
def build_marshal_proto(name):
|
|
return ('void qmp_marshal_%s(QDict *args, QObject **ret, Error **errp)'
|
|
% c_name(name))
|
|
|
|
|
|
def gen_marshal_decl(name):
|
|
return mcgen('''
|
|
%(proto)s;
|
|
''',
|
|
proto=build_marshal_proto(name))
|
|
|
|
|
|
def gen_marshal(name, arg_type, boxed, ret_type):
|
|
have_args = arg_type and not arg_type.is_empty()
|
|
|
|
ret = mcgen('''
|
|
|
|
%(proto)s
|
|
{
|
|
Error *err = NULL;
|
|
''',
|
|
proto=build_marshal_proto(name))
|
|
|
|
if ret_type:
|
|
ret += mcgen('''
|
|
%(c_type)s retval;
|
|
''',
|
|
c_type=ret_type.c_type())
|
|
|
|
if have_args:
|
|
visit_members = ('visit_type_%s_members(v, &arg, &err);'
|
|
% arg_type.c_name())
|
|
ret += mcgen('''
|
|
Visitor *v;
|
|
%(c_name)s arg = {0};
|
|
|
|
''',
|
|
c_name=arg_type.c_name())
|
|
else:
|
|
visit_members = ''
|
|
ret += mcgen('''
|
|
Visitor *v = NULL;
|
|
|
|
if (args) {
|
|
''')
|
|
push_indent()
|
|
|
|
ret += mcgen('''
|
|
v = qobject_input_visitor_new(QOBJECT(args));
|
|
visit_start_struct(v, NULL, NULL, 0, &err);
|
|
if (err) {
|
|
goto out;
|
|
}
|
|
%(visit_members)s
|
|
if (!err) {
|
|
visit_check_struct(v, &err);
|
|
}
|
|
visit_end_struct(v, NULL);
|
|
if (err) {
|
|
goto out;
|
|
}
|
|
''',
|
|
visit_members=visit_members)
|
|
|
|
if not have_args:
|
|
pop_indent()
|
|
ret += mcgen('''
|
|
}
|
|
''')
|
|
|
|
ret += gen_call(name, arg_type, boxed, ret_type)
|
|
|
|
ret += mcgen('''
|
|
|
|
out:
|
|
error_propagate(errp, err);
|
|
visit_free(v);
|
|
''')
|
|
|
|
if have_args:
|
|
visit_members = ('visit_type_%s_members(v, &arg, NULL);'
|
|
% arg_type.c_name())
|
|
else:
|
|
visit_members = ''
|
|
ret += mcgen('''
|
|
if (args) {
|
|
''')
|
|
push_indent()
|
|
|
|
ret += mcgen('''
|
|
v = qapi_dealloc_visitor_new();
|
|
visit_start_struct(v, NULL, NULL, 0, NULL);
|
|
%(visit_members)s
|
|
visit_end_struct(v, NULL);
|
|
visit_free(v);
|
|
''',
|
|
visit_members=visit_members)
|
|
|
|
if not have_args:
|
|
pop_indent()
|
|
ret += mcgen('''
|
|
}
|
|
''')
|
|
|
|
ret += mcgen('''
|
|
}
|
|
''')
|
|
return ret
|
|
|
|
|
|
def gen_register_command(name, success_response):
|
|
options = 'QCO_NO_OPTIONS'
|
|
if not success_response:
|
|
options = 'QCO_NO_SUCCESS_RESP'
|
|
|
|
ret = mcgen('''
|
|
qmp_register_command(cmds, "%(name)s",
|
|
qmp_marshal_%(c_name)s, %(opts)s);
|
|
''',
|
|
name=name, c_name=c_name(name),
|
|
opts=options)
|
|
return ret
|
|
|
|
|
|
def gen_registry(registry):
|
|
ret = mcgen('''
|
|
|
|
void %(c_prefix)sqmp_init_marshal(QmpCommandList *cmds)
|
|
{
|
|
QTAILQ_INIT(cmds);
|
|
|
|
''',
|
|
c_prefix=c_name(prefix, protect=False))
|
|
ret += registry
|
|
ret += mcgen('''
|
|
}
|
|
''')
|
|
return ret
|
|
|
|
|
|
class QAPISchemaGenCommandVisitor(QAPISchemaVisitor):
|
|
def __init__(self):
|
|
self.decl = None
|
|
self.defn = None
|
|
self._regy = None
|
|
self._visited_ret_types = None
|
|
|
|
def visit_begin(self, schema):
|
|
self.decl = ''
|
|
self.defn = ''
|
|
self._regy = ''
|
|
self._visited_ret_types = set()
|
|
|
|
def visit_end(self):
|
|
self.defn += gen_registry(self._regy)
|
|
self._regy = None
|
|
self._visited_ret_types = None
|
|
|
|
def visit_command(self, name, info, arg_type, ret_type,
|
|
gen, success_response, boxed):
|
|
if not gen:
|
|
return
|
|
self.decl += gen_command_decl(name, arg_type, boxed, ret_type)
|
|
if ret_type and ret_type not in self._visited_ret_types:
|
|
self._visited_ret_types.add(ret_type)
|
|
self.defn += gen_marshal_output(ret_type)
|
|
self.decl += gen_marshal_decl(name)
|
|
self.defn += gen_marshal(name, arg_type, boxed, ret_type)
|
|
self._regy += gen_register_command(name, success_response)
|
|
|
|
|
|
(input_file, output_dir, do_c, do_h, prefix, opts) = parse_command_line()
|
|
|
|
c_comment = '''
|
|
/*
|
|
* schema-defined QMP->QAPI command dispatch
|
|
*
|
|
* Copyright IBM, Corp. 2011
|
|
*
|
|
* Authors:
|
|
* Anthony Liguori <aliguori@us.ibm.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 function prototypes
|
|
*
|
|
* Copyright IBM, Corp. 2011
|
|
*
|
|
* Authors:
|
|
* Anthony Liguori <aliguori@us.ibm.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,
|
|
'qmp-marshal.c', 'qmp-commands.h',
|
|
c_comment, h_comment)
|
|
|
|
fdef.write(mcgen('''
|
|
#include "qemu/osdep.h"
|
|
#include "qemu-common.h"
|
|
#include "qemu/module.h"
|
|
#include "qapi/qmp/types.h"
|
|
#include "qapi/visitor.h"
|
|
#include "qapi/qobject-output-visitor.h"
|
|
#include "qapi/qobject-input-visitor.h"
|
|
#include "qapi/dealloc-visitor.h"
|
|
#include "%(prefix)sqapi-types.h"
|
|
#include "%(prefix)sqapi-visit.h"
|
|
#include "%(prefix)sqmp-commands.h"
|
|
|
|
''',
|
|
prefix=prefix))
|
|
|
|
fdecl.write(mcgen('''
|
|
#include "%(prefix)sqapi-types.h"
|
|
#include "qapi/qmp/qdict.h"
|
|
#include "qapi/qmp/dispatch.h"
|
|
#include "qapi/error.h"
|
|
|
|
void %(c_prefix)sqmp_init_marshal(QmpCommandList *cmds);
|
|
''',
|
|
prefix=prefix, c_prefix=c_name(prefix, protect=False)))
|
|
|
|
schema = QAPISchema(input_file)
|
|
gen = QAPISchemaGenCommandVisitor()
|
|
schema.visit(gen)
|
|
fdef.write(gen.defn)
|
|
fdecl.write(gen.decl)
|
|
|
|
close_output(fdef, fdecl)
|