From b4a5df67f1382a33f4535eb1b10600ca52d294d3 Mon Sep 17 00:00:00 2001 From: Lorry Date: Mon, 9 Jan 2012 13:47:42 +0000 Subject: Tarball conversion --- libgo/runtime/interface.h | 57 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 libgo/runtime/interface.h (limited to 'libgo/runtime/interface.h') diff --git a/libgo/runtime/interface.h b/libgo/runtime/interface.h new file mode 100644 index 0000000000..610f208901 --- /dev/null +++ b/libgo/runtime/interface.h @@ -0,0 +1,57 @@ +/* interface.h -- the interface type for Go. + + Copyright 2009 The Go Authors. All rights reserved. + Use of this source code is governed by a BSD-style + license that can be found in the LICENSE file. */ + +#ifndef LIBGO_INTERFACE_H +#define LIBGO_INTERFACE_H + +#include "go-type.h" + +/* A variable of interface type is an instance of this struct, if the + interface has any methods. */ + +struct __go_interface +{ + /* A pointer to the interface method table. The first pointer is + the type descriptor of the object. Subsequent pointers are + pointers to functions. This is effectively the vtable for this + interface. The function pointers are in the same order as the + list in the internal representation of the interface, which sorts + them by name. */ + const void **__methods; + + /* The object. If the object is a pointer--if the type descriptor + code is GO_PTR or GO_UNSAFE_POINTER--then this field is the value + of the object itself. Otherwise this is a pointer to memory + which holds the value. */ + void *__object; +}; + +/* A variable of an empty interface type is an instance of this + struct. */ + +struct __go_empty_interface +{ + /* The type descriptor of the object. */ + const struct __go_type_descriptor *__type_descriptor; + + /* The object. This is the same as __go_interface above. */ + void *__object; +}; + +extern void * +__go_convert_interface (const struct __go_type_descriptor *, + const struct __go_type_descriptor *); + +extern void * +__go_convert_interface_2 (const struct __go_type_descriptor *, + const struct __go_type_descriptor *, + _Bool may_fail); + +extern _Bool +__go_can_convert_to_interface(const struct __go_type_descriptor *, + const struct __go_type_descriptor *); + +#endif /* !defined(LIBGO_INTERFACE_H) */ -- cgit v1.2.1