| 1 |
#!/usr/bin/perl |
| 2 |
|
| 3 |
print <<EOF; |
| 4 |
// THIS IS A GENERATED FILE: RUN callback.pl to regenerate it |
| 5 |
// THIS IS A GENERATED FILE: callback.pl is part of the GVPE |
| 6 |
// THIS IS A GENERATED FILE: distribution. |
| 7 |
|
| 8 |
/* |
| 9 |
callback.h -- C++ callback mechanism |
| 10 |
Copyright (C) 2003-2006 Marc Lehmann <pcg\@goof.com> |
| 11 |
|
| 12 |
This file is part of GVPE. |
| 13 |
|
| 14 |
GVPE is free software; you can redistribute it and/or modify |
| 15 |
it under the terms of the GNU General Public License as published by |
| 16 |
the Free Software Foundation; either version 2 of the License, or |
| 17 |
(at your option) any later version. |
| 18 |
|
| 19 |
This program is distributed in the hope that it will be useful, |
| 20 |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 22 |
GNU General Public License for more details. |
| 23 |
|
| 24 |
You should have received a copy of the GNU General Public License |
| 25 |
along with gvpe; if not, write to the Free Software |
| 26 |
Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 27 |
*/ |
| 28 |
|
| 29 |
#ifndef CALLBACK_H__ |
| 30 |
#define CALLBACK_H__ |
| 31 |
|
| 32 |
#define CALLBACK_H_VERSION 2 |
| 33 |
|
| 34 |
template<class signature> |
| 35 |
struct callback_funtype_trait; |
| 36 |
|
| 37 |
template<int arity, class signature> |
| 38 |
struct callback_get_impl; |
| 39 |
|
| 40 |
EOF |
| 41 |
|
| 42 |
for my $a (0..10) { |
| 43 |
my $CLASS = join "", map ", class A$_", 1..$a; |
| 44 |
my $TYPE = join ", ", map "A$_", 1..$a; |
| 45 |
my $ARG = join ", ", map "a$_", 1..$a; |
| 46 |
my $TYPEARG = join ", ", map "A$_ a$_", 1..$a; |
| 47 |
my $TYPEDEFS = join " ", map "typedef A$_ arg$_\_type;", 1..$a; |
| 48 |
my $TYPEvoid = $TYPE ? $TYPE : "void"; |
| 49 |
my $_TYPE = $TYPE ? ", $TYPE" : ""; |
| 50 |
my $_ARG = $ARG ? ", $ARG" : ""; |
| 51 |
my $_TYPEARG = $TYPEARG ? ", $TYPEARG" : ""; |
| 52 |
my $_TTYPE = $a ? join "", map ", typename T::arg$_\_type", 1..$a : ""; |
| 53 |
|
| 54 |
print <<EOF; |
| 55 |
template<class R$CLASS> |
| 56 |
class callback$a |
| 57 |
{ |
| 58 |
struct object { }; |
| 59 |
|
| 60 |
typedef R (object::*ptr_type)($TYPE); |
| 61 |
|
| 62 |
void *obj; |
| 63 |
R (object::*meth)($TYPE); |
| 64 |
|
| 65 |
/* a proxy is a kind of recipe on how to call a specific class method */ |
| 66 |
struct proxy_base { |
| 67 |
virtual R call (void *obj, R (object::*meth)($TYPE)$_TYPEARG) const = 0; |
| 68 |
}; |
| 69 |
template<class O1, class O2> |
| 70 |
struct proxy : proxy_base { |
| 71 |
virtual R call (void *obj, R (object::*meth)($TYPE)$_TYPEARG) const |
| 72 |
{ |
| 73 |
return (R)((reinterpret_cast<O1 *>(obj)) ->* (reinterpret_cast<R (O2::*)($TYPE)>(meth))) |
| 74 |
($ARG); |
| 75 |
} |
| 76 |
}; |
| 77 |
|
| 78 |
proxy_base *prxy; |
| 79 |
|
| 80 |
public: |
| 81 |
template<class O1, class O2> |
| 82 |
explicit callback$a (O1 *object, R (O2::*method)($TYPE)) |
| 83 |
{ |
| 84 |
static proxy<O1,O2> p; |
| 85 |
obj = reinterpret_cast<void *>(object); |
| 86 |
meth = reinterpret_cast<R (object::*)($TYPE)>(method); |
| 87 |
prxy = &p; |
| 88 |
} |
| 89 |
|
| 90 |
R call($TYPEARG) const |
| 91 |
{ |
| 92 |
return prxy->call (obj, meth$_ARG); |
| 93 |
} |
| 94 |
|
| 95 |
R operator ()($TYPEARG) const |
| 96 |
{ |
| 97 |
return call ($ARG); |
| 98 |
} |
| 99 |
}; |
| 100 |
|
| 101 |
template<class R$CLASS> |
| 102 |
struct callback_funtype_trait$a |
| 103 |
{ |
| 104 |
static const int arity = $a; |
| 105 |
typedef R type ($TYPEvoid); |
| 106 |
typedef R result_type; |
| 107 |
$TYPEDEFS |
| 108 |
}; |
| 109 |
|
| 110 |
template<class R$CLASS> |
| 111 |
struct callback_funtype_trait<R ($TYPE)> : callback_funtype_trait$a<R$_TYPE> |
| 112 |
{ |
| 113 |
}; |
| 114 |
|
| 115 |
template<class signature> |
| 116 |
struct callback_get_impl<$a, signature> |
| 117 |
{ |
| 118 |
typedef callback_funtype_trait<signature> T; |
| 119 |
typedef callback$a<typename T::result_type$_TTYPE> type; |
| 120 |
}; |
| 121 |
|
| 122 |
EOF |
| 123 |
} |
| 124 |
|
| 125 |
print <<EOF |
| 126 |
|
| 127 |
template<class signature> |
| 128 |
struct callback : callback_get_impl<callback_funtype_trait<signature>::arity, signature>::type |
| 129 |
{ |
| 130 |
typedef typename callback_get_impl<callback_funtype_trait<signature>::arity, signature>::type base_type; |
| 131 |
|
| 132 |
template<class O, class M> |
| 133 |
explicit callback (O object, M method) |
| 134 |
: base_type (object, method) |
| 135 |
{ |
| 136 |
} |
| 137 |
}; |
| 138 |
|
| 139 |
#endif |
| 140 |
EOF |
| 141 |
|
