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https://github.com/golang/go
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b2a950bb73
Rename "gothrow" to "throw" now that the C version of "throw" is no longer needed. This change is purely mechanical except in panic.go where the old version of "throw" has been deleted. sed -i "" 's/[[:<:]]gothrow[[:>:]]/throw/g' runtime/*.go Change-Id: Icf0752299c35958b92870a97111c67bcd9159dc3 Reviewed-on: https://go-review.googlesource.com/2150 Reviewed-by: Minux Ma <minux@golang.org> Reviewed-by: Dave Cheney <dave@cheney.net>
41 lines
934 B
Go
41 lines
934 B
Go
// Copyright 2012 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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// Lock-free stack.
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// The following code runs only on g0 stack.
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package runtime
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import "unsafe"
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func lfstackpush(head *uint64, node *lfnode) {
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node.pushcnt++
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new := lfstackPack(node, node.pushcnt)
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if node1, _ := lfstackUnpack(new); node1 != node {
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println("runtime: lfstackpush invalid packing: node=", node, " cnt=", hex(node.pushcnt), " packed=", hex(new), " -> node=", node1, "\n")
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throw("lfstackpush")
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}
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for {
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old := atomicload64(head)
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node.next = old
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if cas64(head, old, new) {
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break
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}
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}
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}
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func lfstackpop(head *uint64) unsafe.Pointer {
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for {
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old := atomicload64(head)
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if old == 0 {
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return nil
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}
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node, _ := lfstackUnpack(old)
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next := atomicload64(&node.next)
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if cas64(head, old, next) {
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return unsafe.Pointer(node)
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}
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}
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}
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