bae90c989c
This revision was committed January 7, 2014. The next revision deleted runtime/mfinal.c. That will be done in a subsequent merge. This merge changes type descriptors to add a zero field, pointing to a zero value for that type. This is implemented as a common variable. * go-gcc.cc (Gcc_backend::implicit_variable): Add is_common and alignment parameters. Permit init parameter to be NULL. From-SVN: r211249
109 lines
2.4 KiB
C
109 lines
2.4 KiB
C
/* go-unsafe-pointer.c -- unsafe.Pointer type descriptor for Go.
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Copyright 2009 The Go Authors. All rights reserved.
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Use of this source code is governed by a BSD-style
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license that can be found in the LICENSE file. */
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#include <stddef.h>
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#include "runtime.h"
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#include "go-type.h"
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/* A pointer with a zero value. */
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static void *zero_pointer;
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/* This file provides the type descriptor for the unsafe.Pointer type.
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The unsafe package is defined by the compiler itself, which means
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that there is no package to compile to define the type
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descriptor. */
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extern const struct __go_type_descriptor unsafe_Pointer
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__asm__ (GOSYM_PREFIX "__go_tdn_unsafe.Pointer");
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/* Used to determine the field alignment. */
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struct field_align
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{
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char c;
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void *p;
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};
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/* The reflection string. */
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#define REFLECTION "unsafe.Pointer"
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static const String reflection_string =
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{
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(const byte *) REFLECTION,
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sizeof REFLECTION - 1
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};
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const struct __go_type_descriptor unsafe_Pointer =
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{
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/* __code */
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GO_UNSAFE_POINTER,
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/* __align */
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__alignof (void *),
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/* __field_align */
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offsetof (struct field_align, p) - 1,
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/* __size */
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sizeof (void *),
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/* __hash */
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78501163U,
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/* __hashfn */
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__go_type_hash_identity,
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/* __equalfn */
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__go_type_equal_identity,
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/* __reflection */
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&reflection_string,
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/* __uncommon */
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NULL,
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/* __pointer_to_this */
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NULL,
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/* __zero */
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&zero_pointer
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};
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/* We also need the type descriptor for the pointer to unsafe.Pointer,
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since any package which refers to that type descriptor will expect
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it to be defined elsewhere. */
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extern const struct __go_ptr_type pointer_unsafe_Pointer
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__asm__ (GOSYM_PREFIX "__go_td_pN14_unsafe.Pointer");
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/* The reflection string. */
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#define PREFLECTION "*unsafe.Pointer"
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static const String preflection_string =
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{
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(const byte *) PREFLECTION,
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sizeof PREFLECTION - 1,
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};
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const struct __go_ptr_type pointer_unsafe_Pointer =
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{
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/* __common */
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{
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/* __code */
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GO_PTR,
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/* __align */
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__alignof (void *),
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/* __field_align */
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offsetof (struct field_align, p) - 1,
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/* __size */
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sizeof (void *),
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/* __hash */
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1256018616U,
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/* __hashfn */
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__go_type_hash_identity,
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/* __equalfn */
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__go_type_equal_identity,
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/* __reflection */
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&preflection_string,
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/* __uncommon */
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NULL,
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/* __pointer_to_this */
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NULL,
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/* __zero */
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&zero_pointer
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},
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/* __element_type */
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&unsafe_Pointer
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};
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