42 lines
1.0 KiB
C
42 lines
1.0 KiB
C
/* go-unsafe-newarray.c -- unsafe.NewArray function 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 "runtime.h"
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#include "arch.h"
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#include "malloc.h"
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#include "go-type.h"
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#include "interface.h"
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/* Implement unsafe_NewArray, called from the reflect package. */
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void *unsafe_NewArray (const struct __go_type_descriptor *, intgo)
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asm ("reflect.unsafe_NewArray");
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/* The dynamic type of the argument will be a pointer to a type
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descriptor. */
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void *
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unsafe_NewArray (const struct __go_type_descriptor *descriptor, intgo n)
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{
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uint64 size;
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void *ret;
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size = n * descriptor->__size;
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if (size == 0)
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ret = &runtime_zerobase;
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else if ((descriptor->__code & GO_NO_POINTERS) != 0)
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ret = runtime_mallocgc (size, FlagNoPointers, 1, 1);
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else
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{
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ret = runtime_mallocgc (size, 0, 1, 1);
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if (UseSpanType)
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runtime_settype (ret, (uintptr) descriptor | TypeInfo_Array);
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}
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return ret;
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}
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