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qemu-e2k/scripts/qapi-commands.py
Markus Armbruster 4180978c92 qapi: Inline gen_command_decl_prologue(), gen_command_def_prologue() 
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-05-14 18:41:33 +02:00

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#
# QAPI command marshaller generator
#
# Copyright IBM, Corp. 2011
# Copyright (C) 2014-2015 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 ordereddict import OrderedDict
from qapi import *
import re
def generate_command_decl(name, args, ret_type):
arglist=""
for argname, argtype, optional in parse_args(args):
argtype = c_type(argtype, is_param=True)
if optional:
arglist += "bool has_%s, " % c_name(argname)
arglist += "%s %s, " % (argtype, c_name(argname))
return mcgen('''
%(ret_type)s qmp_%(name)s(%(args)sError **errp);
''',
ret_type=c_type(ret_type), name=c_name(name),
args=arglist).strip()
def gen_err_check(errvar):
if errvar:
return mcgen('''
if (local_err) {
goto out;
}
''')
return ''
def gen_sync_call(name, args, ret_type, indent=0):
ret = ""
arglist=""
retval=""
if ret_type:
retval = "retval = "
for argname, argtype, optional in parse_args(args):
if optional:
arglist += "has_%s, " % c_name(argname)
arglist += "%s, " % (c_name(argname))
push_indent(indent)
ret = mcgen('''
%(retval)sqmp_%(name)s(%(args)s&local_err);
''',
name=c_name(name), args=arglist, retval=retval).rstrip()
if ret_type:
ret += "\n" + gen_err_check('local_err')
ret += "\n" + mcgen(''''
%(marshal_output_call)s
''',
marshal_output_call=gen_marshal_output_call(name, ret_type)).rstrip()
pop_indent(indent)
return ret.rstrip()
def gen_marshal_output_call(name, ret_type):
if not ret_type:
return ""
return "qmp_marshal_output_%s(retval, ret, &local_err);" % c_name(name)
def gen_visitor_input_containers_decl(args, obj):
ret = ""
push_indent()
if len(args) > 0:
ret += mcgen('''
QmpInputVisitor *mi = qmp_input_visitor_new_strict(%(obj)s);
QapiDeallocVisitor *md;
Visitor *v;
''',
obj=obj)
pop_indent()
return ret.rstrip()
def gen_visitor_input_vars_decl(args):
ret = ""
push_indent()
for argname, argtype, optional in parse_args(args):
if optional:
ret += mcgen('''
bool has_%(argname)s = false;
''',
argname=c_name(argname))
if is_c_ptr(argtype):
ret += mcgen('''
%(argtype)s %(argname)s = NULL;
''',
argname=c_name(argname), argtype=c_type(argtype))
else:
ret += mcgen('''
%(argtype)s %(argname)s = {0};
''',
argname=c_name(argname), argtype=c_type(argtype))
pop_indent()
return ret.rstrip()
def gen_visitor_input_block(args, dealloc=False):
ret = ""
errparg = '&local_err'
errarg = 'local_err'
if len(args) == 0:
return ret
push_indent()
if dealloc:
errparg = 'NULL'
errarg = None;
ret += mcgen('''
qmp_input_visitor_cleanup(mi);
md = qapi_dealloc_visitor_new();
v = qapi_dealloc_get_visitor(md);
''')
else:
ret += mcgen('''
v = qmp_input_get_visitor(mi);
''')
for argname, argtype, optional in parse_args(args):
if optional:
ret += mcgen('''
visit_optional(v, &has_%(c_name)s, "%(name)s", %(errp)s);
''',
c_name=c_name(argname), name=argname, errp=errparg)
ret += gen_err_check(errarg)
ret += mcgen('''
if (has_%(c_name)s) {
''',
c_name=c_name(argname))
push_indent()
ret += mcgen('''
visit_type_%(visitor)s(v, &%(c_name)s, "%(name)s", %(errp)s);
''',
c_name=c_name(argname), name=argname, argtype=argtype,
visitor=type_name(argtype), errp=errparg)
ret += gen_err_check(errarg)
if optional:
pop_indent()
ret += mcgen('''
}
''')
if dealloc:
ret += mcgen('''
qapi_dealloc_visitor_cleanup(md);
''')
pop_indent()
return ret.rstrip()
def gen_marshal_output(name, args, ret_type, middle_mode):
if not ret_type:
return ""
ret = mcgen('''
static void qmp_marshal_output_%(c_name)s(%(c_ret_type)s ret_in, QObject **ret_out, Error **errp)
{
Error *local_err = NULL;
QmpOutputVisitor *mo = qmp_output_visitor_new();
QapiDeallocVisitor *md;
Visitor *v;
v = qmp_output_get_visitor(mo);
visit_type_%(visitor)s(v, &ret_in, "unused", &local_err);
if (local_err) {
goto out;
}
*ret_out = qmp_output_get_qobject(mo);
out:
error_propagate(errp, local_err);
qmp_output_visitor_cleanup(mo);
md = qapi_dealloc_visitor_new();
v = qapi_dealloc_get_visitor(md);
visit_type_%(visitor)s(v, &ret_in, "unused", NULL);
qapi_dealloc_visitor_cleanup(md);
}
''',
c_ret_type=c_type(ret_type), c_name=c_name(name),
visitor=type_name(ret_type))
return ret
def gen_marshal_input_decl(name, args, ret_type, middle_mode):
if middle_mode:
return 'int qmp_marshal_input_%s(Monitor *mon, const QDict *qdict, QObject **ret)' % c_name(name)
else:
return 'static void qmp_marshal_input_%s(QDict *args, QObject **ret, Error **errp)' % c_name(name)
def gen_marshal_input(name, args, ret_type, middle_mode):
hdr = gen_marshal_input_decl(name, args, ret_type, middle_mode)
ret = mcgen('''
%(header)s
{
Error *local_err = NULL;
''',
header=hdr)
if middle_mode:
ret += mcgen('''
QDict *args = (QDict *)qdict;
''')
if ret_type:
if is_c_ptr(ret_type):
retval = " %s retval = NULL;" % c_type(ret_type)
else:
retval = " %s retval;" % c_type(ret_type)
ret += mcgen('''
%(retval)s
''',
retval=retval)
if len(args) > 0:
ret += mcgen('''
%(visitor_input_containers_decl)s
%(visitor_input_vars_decl)s
%(visitor_input_block)s
''',
visitor_input_containers_decl=gen_visitor_input_containers_decl(args, "QOBJECT(args)"),
visitor_input_vars_decl=gen_visitor_input_vars_decl(args),
visitor_input_block=gen_visitor_input_block(args))
else:
ret += mcgen('''
(void)args;
''')
ret += mcgen('''
%(sync_call)s
''',
sync_call=gen_sync_call(name, args, ret_type, indent=4))
if re.search('^ *goto out\\;', ret, re.MULTILINE):
ret += mcgen('''
out:
''')
if not middle_mode:
ret += mcgen('''
error_propagate(errp, local_err);
''')
ret += mcgen('''
%(visitor_input_block_cleanup)s
''',
visitor_input_block_cleanup=gen_visitor_input_block(args,
dealloc=True))
if middle_mode:
ret += mcgen('''
if (local_err) {
qerror_report_err(local_err);
error_free(local_err);
return -1;
}
return 0;
''')
else:
ret += mcgen('''
return;
''')
ret += mcgen('''
}
''')
return ret
def gen_registry(commands):
registry=""
push_indent()
for cmd in commands:
options = 'QCO_NO_OPTIONS'
if not cmd.get('success-response', True):
options = 'QCO_NO_SUCCESS_RESP'
registry += mcgen('''
qmp_register_command("%(name)s", qmp_marshal_input_%(c_name)s, %(opts)s);
''',
name=cmd['command'], c_name=c_name(cmd['command']),
opts=options)
pop_indent()
ret = mcgen('''
static void qmp_init_marshal(void)
{
%(registry)s
}
qapi_init(qmp_init_marshal);
''',
registry=registry.rstrip())
return ret
middle_mode = False
(input_file, output_dir, do_c, do_h, prefix, opts) = \
parse_command_line("m", ["middle"])
for o, a in opts:
if o in ("-m", "--middle"):
middle_mode = True
exprs = parse_schema(input_file)
commands = filter(lambda expr: expr.has_key('command'), exprs)
commands = filter(lambda expr: not expr.has_key('gen'), commands)
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-common.h"
#include "qemu/module.h"
#include "qapi/qmp/qerror.h"
#include "qapi/qmp/types.h"
#include "qapi/qmp/dispatch.h"
#include "qapi/visitor.h"
#include "qapi/qmp-output-visitor.h"
#include "qapi/qmp-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/error.h"
''',
prefix=prefix))
for cmd in commands:
arglist = []
ret_type = None
if cmd.has_key('data'):
arglist = cmd['data']
if cmd.has_key('returns'):
ret_type = cmd['returns']
ret = generate_command_decl(cmd['command'], arglist, ret_type) + "\n"
fdecl.write(ret)
if ret_type:
ret = gen_marshal_output(cmd['command'], arglist, ret_type, middle_mode) + "\n"
fdef.write(ret)
if middle_mode:
fdecl.write('%s;\n' % gen_marshal_input_decl(cmd['command'], arglist, ret_type, middle_mode))
ret = gen_marshal_input(cmd['command'], arglist, ret_type, middle_mode) + "\n"
fdef.write(ret)
if not middle_mode:
ret = gen_registry(commands)
fdef.write(ret)
close_output(fdef, fdecl)
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