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Editing: tagptr_32bit.go
// Copyright 2014 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. //go:build 386 || arm || mips || mipsle package runtime import "unsafe" // The number of bits stored in the numeric tag of a taggedPointer const taggedPointerBits = 32 // On 32-bit systems, taggedPointer has a 32-bit pointer and 32-bit count. // taggedPointerPack created a taggedPointer from a pointer and a tag. // Tag bits that don't fit in the result are discarded. func taggedPointerPack(ptr unsafe.Pointer, tag uintptr) taggedPointer { return taggedPointer(uintptr(ptr))<<32 | taggedPointer(tag) } // Pointer returns the pointer from a taggedPointer. func (tp taggedPointer) pointer() unsafe.Pointer { return unsafe.Pointer(uintptr(tp >> 32)) } // Tag returns the tag from a taggedPointer. func (tp taggedPointer) tag() uintptr { return uintptr(tp) }
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