libvirt/qemud/remote_generate_stubs.pl
2008-05-22 15:20:25 +00:00

225 lines
5.6 KiB
Perl
Executable File

#!/usr/bin/perl -w
#
# This script parses remote_protocol.x and produces lots of boilerplate
# code for both ends of the remote connection.
#
# By Richard Jones <rjones@redhat.com>
#
# $Id$
use strict;
use Getopt::Std;
# Command line options.
our ($opt_c, $opt_d, $opt_i, $opt_s, $opt_v, $opt_w);
getopts ('cdisvw');
# Convert name_of_call to NameOfCall.
sub name_to_ProcName {
my $name = shift;
my @elems = split /_/, $name;
@elems = map ucfirst, @elems;
join "", @elems
}
# Read the input file (usually remote_protocol.x) and form an
# opinion about the name, args and return type of each RPC.
my ($name, $ProcName, %calls);
while (<>) {
if (/^struct remote_(.*)_args/) {
$name = $1;
$ProcName = name_to_ProcName ($name);
die "duplicate definition of remote_${name}_args"
if exists $calls{$name};
$calls{$name} = {
name => $name,
ProcName => $ProcName,
UC_NAME => uc $name,
args => "remote_${name}_args",
ret => "void",
};
} elsif (/^struct remote_(.*)_ret/) {
$name = $1;
$ProcName = name_to_ProcName ($name);
if (exists $calls{$name}) {
$calls{$name}->{ret} = "remote_${name}_ret";
} else {
$calls{$name} = {
name => $name,
ProcName => $ProcName,
UC_NAME => uc $name,
args => "void",
ret => "remote_${name}_ret"
}
}
}
}
# REMOTE_PROC_CLOSE has no args or ret.
$calls{close} = {
name => "close",
ProcName => "Close",
UC_NAME => "CLOSE",
args => "void",
ret => "void",
};
#----------------------------------------------------------------------
# Output
print <<__EOF__;
/* Automatically generated by remote_generate_stubs.pl.
* Do not edit this file. Any changes you make will be lost.
*/
__EOF__
# Debugging.
if ($opt_d) {
my @keys = sort (keys %calls);
foreach (@keys) {
print "$_:\n";
print " name $calls{$_}->{name} ($calls{$_}->{ProcName})\n";
print " $calls{$_}->{args} -> $calls{$_}->{ret}\n";
}
}
# Prototypes for dispatch functions ("remote_dispatch_prototypes.h").
elsif ($opt_i) {
my @keys = sort (keys %calls);
foreach (@keys) {
print "static int remoteDispatch$calls{$_}->{ProcName} (struct qemud_server *server, struct qemud_client *client, remote_message_header *req, $calls{$_}->{args} *args, $calls{$_}->{ret} *ret);\n";
}
}
# Local variables used inside remoteDispatchClientRequest
# ("remote_dispatch_localvars.h").
elsif ($opt_v) {
my @values = values %calls;
foreach (@values) {
if ($_->{args} ne "void") {
print "$_->{args} lv_$_->{args};\n";
}
if ($_->{ret} ne "void") {
print "$_->{ret} lv_$_->{ret};\n";
}
}
}
# Inside the switch statement, prepare the 'fn', 'args_filter', etc
# ("remote_dispatch_proc_switch.h").
elsif ($opt_w) {
my @keys = sort (keys %calls);
foreach (@keys) {
print "case REMOTE_PROC_$calls{$_}->{UC_NAME}:\n";
print " fn = (dispatch_fn) remoteDispatch$calls{$_}->{ProcName};\n";
if ($calls{$_}->{args} ne "void") {
print " args_filter = (xdrproc_t) xdr_$calls{$_}->{args};\n";
print " args = (char *) &lv_$calls{$_}->{args};\n";
print " memset (&lv_$calls{$_}->{args}, 0, sizeof lv_$calls{$_}->{args});\n"
}
if ($calls{$_}->{ret} ne "void") {
print " ret_filter = (xdrproc_t) xdr_$calls{$_}->{ret};\n";
print " ret = (char *) &lv_$calls{$_}->{ret};\n";
print " memset (&lv_$calls{$_}->{ret}, 0, sizeof lv_$calls{$_}->{ret});\n"
}
print " break;\n";
}
}
# Generate client stubs - just used to generate the first
# version of the stubs in remote_internal.c. They need
# hand-hacking afterwards.
elsif ($opt_c) {
my @keys = sort (keys %calls);
foreach (@keys) {
my $args = $calls{$_}->{args};
my $argsvoid = $args eq "void";
my $ret = $calls{$_}->{ret};
my $retvoid = $ret eq "void";
print "static @@\n";
print "remote$calls{$_}->{ProcName} (@@)\n";
print "{\n";
if (!$argsvoid) {
print " $args args;\n";
}
if (!$retvoid) {
print " $ret ret;\n";
}
print " GET_PRIVATE (conn, @@);\n";
print "\n";
if (!$argsvoid) {
print " @@\n";
print "\n";
}
if (!$retvoid) {
print " memset (&ret, 0, sizeof ret);\n";
}
print " if (call (conn, priv, 0, REMOTE_PROC_$calls{$_}->{UC_NAME},\n";
print " (xdrproc_t) xdr_$args, (char *) ";
if ($argsvoid) {
print "NULL";
} else {
print "&args";
}
print ",\n";
print " (xdrproc_t) xdr_$ret, (char *) ";
if ($retvoid) {
print "NULL";
} else {
print "&ret";
}
print ") == -1)\n";
print " return -1;\n";
print "\n @@\n";
print "}\n\n";
}
}
# Generate server stubs - just used to generate the first
# version of the stubs in remote.c. They need hand-hacking
# afterwards.
elsif ($opt_s) {
my @keys = sort (keys %calls);
foreach (@keys) {
my $args = $calls{$_}->{args};
my $argsvoid = $args eq "void";
my $ret = $calls{$_}->{ret};
my $retvoid = $ret eq "void";
print "static int\n";
print "remoteDispatch$calls{$_}->{ProcName} (struct qemud_server *server,\n";
print " struct qemud_client *client,\n";
print " remote_message_header *req,\n";
print " remote_get_max_vcpus_args *args,\n";
print " remote_get_max_vcpus_ret *ret)\n";
print "{\n";
if (!$argsvoid || !$retvoid) {
print " @@\n";
}
print " CHECK_CONN;\n";
print "\n";
if (!$argsvoid) {
print " @@\n";
print "\n";
}
print " @@ = vir$calls{$_}->{ProcName} (@@);\n";
print " if (@@) return -1;\n";
print "\n";
if (!$retvoid) {
print " @@\n";
print "\n";
}
print " return 0;\n";
print "}\n\n";
}
}