lfstack_32bit.go

Documentation: runtime

     1  // Copyright 2014 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  //go:build 386 || arm || mips || mipsle
     6  // +build 386 arm mips mipsle
     7  
     8  package runtime
     9  
    10  import "unsafe"
    11  
    12  // On 32-bit systems, the stored uint64 has a 32-bit pointer and 32-bit count.
    13  
    14  func lfstackPack(node *lfnode, cnt uintptr) uint64 {
    15  	return uint64(uintptr(unsafe.Pointer(node)))<<32 | uint64(cnt)
    16  }
    17  
    18  func lfstackUnpack(val uint64) *lfnode {
    19  	return (*lfnode)(unsafe.Pointer(uintptr(val >> 32)))
    20  }
    21
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