We now have a new, more extensible client/server communication model.
1999-11-28 Martin Baulig <martin@home-of-linux.org> * lib/lib.pl: We now have a new, more extensible client/server communication model. Include `$(top_srcdir)/scripts/c_types.pl' here.
This commit is contained in:
Martin Baulig
committed by
Martin Baulig
Martin Baulig
parent
b60b7fd201
commit
aeeef43f45
@@ -12,8 +12,8 @@ libgtop_la_LDFLAGS = $(LT_VERSION_INFO)
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BUILT_SOURCES = lib.c
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lib.c: lib.pl $(top_builddir)/config.h $(top_srcdir)/features.def
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$(PERL) $(srcdir)/lib.pl < $(top_srcdir)/features.def > lib-t
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lib.c: lib.pl $(top_builddir)/config.h $(top_srcdir)/features.def $(top_srcdir)/scripts/c_types.pl
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$(PERL) -I $(top_srcdir)/scripts $(srcdir)/lib.pl < $(top_srcdir)/features.def > lib-t
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mv lib-t lib.c
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EXTRA_DIST = lib.pl
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275
lib/lib.pl
275
lib/lib.pl
@@ -1,9 +1,13 @@
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#!/usr/bin/perl
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require 'c_types.pl';
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$[ = 1; # set array base to 1
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$, = ' '; # set output field separator
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$\ = "\n"; # set output record separator
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$always_use_temp_storage = 1;
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sub toupper {
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local($_) = @_;
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tr/a-z/A-Z/;
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@@ -22,6 +26,7 @@ print '';
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print '#include <glibtop.h>';
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print '#include <glibtop/open.h>';
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print '#include <glibtop/xmalloc.h>';
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print '';
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print '#include <glibtop/sysdeps.h>';
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print '#include <glibtop/union.h>';
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@@ -64,15 +69,6 @@ print '';
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print '/* Library functions. */';
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print '';
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$convert{'long'} = 'int64_t';
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$convert{'ulong'} = 'u_int64_t';
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$convert{'pid_t'} = 'pid_t';
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$convert{'int'} = 'int';
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$convert{'retval'} = 'int';
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$convert{'ushort'} = 'unsigned short';
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$convert{'unsigned'} = 'unsigned';
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$convert{'string'} = 'const char *';
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while (<>) {
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chop; # strip record separator
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@@ -116,149 +112,184 @@ sub output {
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$prefix_space = '';
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}
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print $retval;
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$check_server_code = "\n";
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$check_server_code .=
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"\t/* If neccessary, we ask the server for the requested\n" .
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"\t * feature. If not, we call the sysdeps function. */\n\n" .
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"\tif ((server->flags & _GLIBTOP_INIT_STATE_SERVER) &&\n" .
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"\t (server->features & (1 << GLIBTOP_SYSDEPS_" .
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&toupper($feature) . ")))\n" .
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"\t\tgoto call_server;\n\telse\n" .
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"\t\tgoto call_sysdeps;\n\n";
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if ($param_def eq 'string') {
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$call_param = ', ' . $line_fields[5];
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$param_decl = ",\n " . $space . ' const char *' .
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$need_temp_storage = $always_use_temp_storage;
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$size_code = "\t_LIBGTOP_SEND_len = 0;\n";
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$marshal_code = "\t_LIBGTOP_SEND_offset = 0;\n";
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$marshal_code .= "\tmemset (_LIBGTOP_SEND_buf, 0, _LIBGTOP_SEND_len);\n";
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$first_param_name = '';
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$line_fields[5];
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$send_ptr = "\n\tconst void *send_ptr = " . $line_fields[5] . ';';
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$send_size = "\n\tconst size_t send_size =\n\t\tstrlen (" .
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$call_param = '';
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$param_decl = '';
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$need_temp_len = 0;
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$nr_params = (@params = split(/:/, $param_def, 9999));
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for ($param = 1; $param <= $nr_params; $param++) {
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$list = $params[$param];
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$type = $params[$param];
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$type =~ s/\(.*//;
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$list =~ s/^.*\(//;
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$list =~ s/\)$//;
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$count = (@fields = split(/,/, $list, 9999));
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for ($field = 1; $field <= $count; $field++) {
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my $c_type = $typeinfo->{$type}->[1];
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$line_fields[5] . ') + 1;';
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}
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else {
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$call_param = '';
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$param_decl = '';
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$send_size = '';
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$send_ptr = '';
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$nr_params = (@params = split(/:/, $param_def, 9999));
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for ($param = 1; $param <= $nr_params; $param++) {
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$list = $params[$param];
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$type = $params[$param];
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$type =~ s/\(.*//;
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$list =~ s/^.*\(//;
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$list =~ s/\)$//;
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$count = (@fields = split(/,/, $list, 9999));
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for ($field = 1; $field <= $count; $field++) {
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if ($param_decl eq '') {
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$param_decl = ",\n " . $space . ' ';
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}
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else {
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$param_decl = $param_decl . ', ';
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}
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$param_decl = $param_decl . '' . $convert{$type} . ' ' .
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$fields[$field];
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$call_param = $call_param . ', ' . $fields[$field];
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if ($send_ptr eq '') {
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$send_ptr = "\n\tconst void *send_ptr = &" .
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$fields[$field] . ';';
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}
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if ($send_size eq '') {
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$send_size = "\n\tconst size_t send_size =\n\t\t";
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}
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else {
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$send_size = $send_size . ' + ';
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}
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$send_size = $send_size . 'sizeof (' . $fields[$field] . ')';
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}
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if ($first_param_name eq '') {
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$first_param_name = $fields[$field];
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}
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if ($send_size ne '') {
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$send_size = $send_size . ';';
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if ($typeinfo->{$type}->[2]) {
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$need_temp_storage = 1;
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}
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if ($param_decl eq '') {
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$param_decl = ",\n " . $space . ' ';
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}
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else {
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$send_size = "\n\tconst size_t send_size = 0;";
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$param_decl = $param_decl . ', ';
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}
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if ($send_ptr eq '') {
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$send_ptr = "\n\tconst void *send_ptr = NULL;";
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$param_decl = $param_decl . $c_type . ' ' . $fields[$field];
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$call_param = $call_param . ', ' . $fields[$field];
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$size_code .= "\t_LIBGTOP_SEND_len += ";
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if (defined $sizeof_funcs->{$type}) {
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$size_code .= $sizeof_funcs->{$type}->($fields[$field]);
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} else {
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$size_code .= sprintf ("sizeof (%s)", $c_type);
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}
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$size_code .= ";\n";
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$marshal_code .= "\t_LIBGTOP_SEND_ptr = ".
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"(char *) _LIBGTOP_SEND_buf + _LIBGTOP_SEND_offset;\n";
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if (defined $marshal_funcs->{$type}) {
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$marshal_code .= $marshal_funcs->{$type}->($c_type, $fields[$field], "\t");
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} else {
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$marshal_code .= sprintf ("\tmemcpy (_LIBGTOP_SEND_ptr, %s, %s);\n",
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'&'.$fields[$field], "sizeof ($c_type)");
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}
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$marshal_code .= "\t_LIBGTOP_SEND_offset += ";
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if (defined $sizeof_funcs->{$type}) {
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$marshal_code .= $sizeof_funcs->{$type}->($fields[$field]);
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} else {
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$marshal_code .= sprintf ("sizeof (%s)", $c_type);
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}
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$marshal_code .= ";\n";
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}
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}
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if ($line_fields[3] eq '') {
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print 'glibtop_get_' . $feature . '_l (glibtop *server' . $param_decl . ')';
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} else {
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print 'glibtop_get_' . $feature . '_l (glibtop *server, glibtop_' .
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$feature . ' *buf' . $param_decl . ')';
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$local_var_code = "";
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$local_var_code .= "\tunsigned _LIBGTOP_SEND_offset, _LIBGTOP_SEND_len;\n";
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if ($need_temp_len) {
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$local_var_code .= "\tunsigned _LIBGTOP_SEND_temp_len;\n";
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}
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print '{' . $send_ptr . '' . $send_size;
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$local_var_code .= "\tvoid *_LIBGTOP_SEND_buf;\n";
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$local_var_code .= "\tchar *_LIBGTOP_SEND_ptr;\n";
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if ($retval !~ /^void$/) {
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print "\t" . $retval . ' retval = (' . $retval . ') 0;';
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$local_var_code .= sprintf ("\t%s retval = (%s) 0;\n",
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$retval, $retval);
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}
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print '';
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print "\tglibtop_init_r (&server, (1 << GLIBTOP_SYSDEPS_" .
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&toupper($feature) . '), 0);';
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print '';
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print "\t/* If neccessary, we ask the server for the requested";
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print "\t * feature. If not, we call the sysdeps function. */";
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print '';
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print "\tif ((server->flags & _GLIBTOP_INIT_STATE_SERVER) &&";
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print "\t (server->features & (1 << GLIBTOP_SYSDEPS_" .
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&toupper($feature) . ')))';
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print "\t{";
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print "\t\t" . $call_prefix . 'glibtop_call_l (server, GLIBTOP_CMND_' .
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&toupper($feature) . ',';
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print "\t\t\t\t" . $call_prefix_space . 'send_size, send_ptr,';
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if ($line_fields[3] eq '') {
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print "\t\t\t\t". $call_prefix_space . "0, NULL,";
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} else {
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print "\t\t\t\t" . $call_prefix_space . 'sizeof (glibtop_' . $feature .
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'), buf,';
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}
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print "\t\t\t\t" . $call_prefix_space . $retval_param . ');';
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print "\t} else {";
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$sysdeps_code = "call_sysdeps:\n";
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if ($orig !~ /^@/) {
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print '#if (!GLIBTOP_SUID_' . &toupper($feature) . ')';
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$sysdeps_code .= sprintf ("#if (!GLIBTOP_SUID_%s)\n", &toupper($feature));
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}
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if ($line_fields[3] eq '') {
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print "\t\t" . $prefix . 'glibtop_get_' . $feature . '_s (server' .
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$call_param . ');';
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$sysdeps_code .= sprintf ("\t%sglibtop_get_%s_s (server%s);\n",
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$prefix, $feature, $call_param);
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} else {
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print "\t\t" . $prefix . 'glibtop_get_' . $feature . '_s (server, buf' .
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$call_param . ');';
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$sysdeps_code .= sprintf ("\t%sglibtop_get_%s_s (server, buf%s);\n",
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$prefix, $feature, $call_param);
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}
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$sysdeps_code .= "\tgoto check_missing;\n";
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if ($orig !~ /^@/) {
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print '#else';
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print "\t\terrno = ENOSYS;";
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print "\t\tglibtop_error_io_r (server, \"glibtop_get_" . $feature .
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"\");";
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print '#endif';
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$sysdeps_code .= "#else\n\terrno = ENOSYS;\n";
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$sysdeps_code .= sprintf ("\tglibtop_error_io_r (server, \"%s\");\n",
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"glibtop_get_" . $feature);
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$sysdeps_code .= "\tgoto do_return;\n";
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$sysdeps_code .= "#endif\n";
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}
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print "\t}";
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$total_code = sprintf ("%s%s%s\n", $init_code, $check_server_code,
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$sysdeps_code);
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print '';
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$send_buf_code = "\t_LIBGTOP_SEND_buf = ";
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if ($need_temp_storage) {
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$send_buf_code .= "glibtop_malloc_r (server, _LIBGTOP_SEND_len+1)";
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} else {
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$send_buf_code .= '(void *) &'.$first_param_name;
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}
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$send_buf_code .= ";\n";
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$call_code = '';
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$call_code .= sprintf ("\t%sglibtop_call_l (server, GLIBTOP_CMND_%s,\n",
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$call_prefix, &toupper($feature));
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$call_code .= sprintf ("\t\t\t%s%s, %s,\n", $call_prefix_space,
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"_LIBGTOP_SEND_len", "_LIBGTOP_SEND_ptr");
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if ($line_fields[3] eq '') {
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$call_code .= sprintf ("\t\t\t%s0, NULL,\n", $call_prefix_space);
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} else {
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$call_code .= sprintf ("\t\t\t%ssizeof (glibtop_%s), buf,\n",
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$call_prefix_space, $feature);
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}
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$call_code .= sprintf ("\t\t\t%s%s);\n", $call_prefix_space, $retval_param);
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if ($need_temp_storage) {
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$send_buf_free_code = "\tglibtop_free_r (server, _LIBGTOP_SEND_buf);\n";
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} else {
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$send_buf_free_code = "";
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}
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$total_code .= sprintf ("call_server:\n%s\n%s\n%s\n%s\n%s\n",
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$size_code, $send_buf_code, $marshal_code,
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$call_code, $send_buf_free_code);
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$total_code .= "\tgoto check_missing;\n\n";
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$check_code = "check_missing:\n";
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$check_code .= "\t/* Make sure that all required fields are present. */\n";
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if (!($line_fields[3] eq '')) {
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print "\t/* Make sure that all required fields are present. */";
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print '';
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print "\tif (buf->flags & server->required." . $feature . ')';
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print "\t\t_glibtop_missing_feature (server, \"" . $feature .
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"\", buf->flags,";
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print "\t\t\t\t\t &server->required." . $feature . ');';
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$check_code .= "\tif (buf->flags & server->required." . $feature . ")\n";
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$check_code .= "\t\t_glibtop_missing_feature (server, \"" . $feature .
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"\", buf->flags,\n\t\t\t\t\t &server->required." . $feature . ");\n";
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}
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$total_code .= $check_code."\tgoto do_return;\n\n";
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$return_code = "do_return:\n";
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if ($retval !~ /^void$/) {
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print "\n\t/* Now we can return. */";
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print "\n\treturn retval;";
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$return_code .= "\treturn retval;\n";
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} else {
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$return_code .= "\treturn;\n";
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}
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print '}';
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print '';
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$total_code .= $return_code;
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$func_decl = $retval."\n";
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if ($line_fields[3] eq '') {
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$func_decl .= sprintf ("glibtop_get_%s_l (glibtop *server%s)\n",
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$feature, $param_decl);
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} else {
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$func_decl .= sprintf ("glibtop_get_%s_l (glibtop *server, %s *buf%s)\n",
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$feature, 'glibtop_'.$feature, $param_decl);
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}
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$init_code = sprintf ("\tglibtop_init_r (&server, (1 << %s), 0);\n",
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"GLIBTOP_SYSDEPS_".&toupper($feature));
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$total_code = sprintf ("%s{\n%s\n%s\n%s}\n", $func_decl,
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$local_var_code, $total_code);
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print $total_code;
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}
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