Retro68/gcc/libgo/runtime/go-unsafe-newarray.c

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2012-03-27 23:13:14 +00:00
/* go-unsafe-newarray.c -- unsafe.NewArray function 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. */
#include "runtime.h"
#include "go-alloc.h"
#include "go-type.h"
#include "interface.h"
/* Implement unsafe_NewArray, called from the reflect package. */
void *unsafe_NewArray (struct __go_empty_interface type, int n)
asm ("libgo_reflect.reflect.unsafe_NewArray");
/* The dynamic type of the argument will be a pointer to a type
descriptor. */
void *
unsafe_NewArray (struct __go_empty_interface type, int n)
{
const struct __go_type_descriptor *descriptor;
if (((uintptr_t) type.__type_descriptor & reflectFlags) != 0)
runtime_panicstring ("invalid interface value");
/* FIXME: We should check __type_descriptor to verify that this is
really a type descriptor. */
descriptor = (const struct __go_type_descriptor *) type.__object;
return __go_alloc (descriptor->__size * n);
}