mirror of
https://github.com/golang/go
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9204821731
The conversion was done with an automated tool and then modified only as necessary to make it compile and run. vlrt.c was only called from C. Pure delete. [This CL is part of the removal of C code from package runtime. See golang.org/s/dev.cc for an overview.] LGTM=r R=r, austin CC=dvyukov, golang-codereviews, iant, khr https://golang.org/cl/174860043
83 lines
2.0 KiB
Go
83 lines
2.0 KiB
Go
// 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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// +build amd64 amd64p32
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package runtime
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import "unsafe"
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// The calls to nop are to keep these functions from being inlined.
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// If they are inlined we have no guarantee that later rewrites of the
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// code by optimizers will preserve the relative order of memory accesses.
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//go:nosplit
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func atomicload(ptr *uint32) uint32 {
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nop()
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return *ptr
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}
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//go:nosplit
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func atomicloadp(ptr unsafe.Pointer) unsafe.Pointer {
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nop()
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return *(*unsafe.Pointer)(ptr)
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}
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//go:nosplit
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func atomicload64(ptr *uint64) uint64 {
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nop()
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return *ptr
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}
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//go:noescape
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func xadd(ptr *uint32, delta int32) uint32
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//go:noescape
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func xadd64(ptr *uint64, delta int64) uint64
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//go:noescape
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func xchg(ptr *uint32, new uint32) uint32
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//go:noescape
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func xchg64(ptr *uint64, new uint64) uint64
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// xchgp cannot have a go:noescape annotation, because
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// while ptr does not escape, new does. If new is marked as
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// not escaping, the compiler will make incorrect escape analysis
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// decisions about the value being xchg'ed.
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// Instead, make xchgp a wrapper around the actual atomic.
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// When calling the wrapper we mark ptr as noescape explicitly.
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//go:nosplit
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func xchgp(ptr unsafe.Pointer, new unsafe.Pointer) unsafe.Pointer {
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return xchgp1(noescape(ptr), new)
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}
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func xchgp1(ptr unsafe.Pointer, new unsafe.Pointer) unsafe.Pointer
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//go:noescape
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func xchguintptr(ptr *uintptr, new uintptr) uintptr
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//go:noescape
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func atomicor8(ptr *uint8, val uint8)
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//go:noescape
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func cas64(ptr *uint64, old, new uint64) bool
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//go:noescape
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func atomicstore(ptr *uint32, val uint32)
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//go:noescape
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func atomicstore64(ptr *uint64, val uint64)
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// atomicstorep cannot have a go:noescape annotation.
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// See comment above for xchgp.
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//go:nosplit
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func atomicstorep(ptr unsafe.Pointer, new unsafe.Pointer) {
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atomicstorep1(noescape(ptr), new)
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}
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func atomicstorep1(ptr unsafe.Pointer, val unsafe.Pointer)
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