github.com/aloncn/graphics-go@v0.0.1/src/runtime/lfstack_32bit.go (about)

     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  // +build 386 arm nacl
     6  
     7  package runtime
     8  
     9  import "unsafe"
    10  
    11  // On 32-bit systems, the stored uint64 has a 32-bit pointer and 32-bit count.
    12  
    13  func lfstackPack(node *lfnode, cnt uintptr) uint64 {
    14  	return uint64(uintptr(unsafe.Pointer(node)))<<32 | uint64(cnt)
    15  }
    16  
    17  func lfstackUnpack(val uint64) (node *lfnode, cnt uintptr) {
    18  	node = (*lfnode)(unsafe.Pointer(uintptr(val >> 32)))
    19  	cnt = uintptr(val)
    20  	return
    21  }