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go.sys/plan9: define "use" in plan9/syscall.go

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LGTM=0intro
R=rsc, 0intro
CC=golang-codereviews
https://golang.org/cl/141870043
This commit is contained in:
Rob Pike
2014-09-09 11:25:43 -07:00
parent 477fd0357c
commit 417a323d1f
1 changed files with 7 additions and 0 deletions
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plan9/syscall.go
+7
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@@ -21,6 +21,8 @@
// holds a value of type syscall.ErrorString. // holds a value of type syscall.ErrorString.
package plan9 package plan9
import "unsafe"
// ByteSliceFromString returns a NUL-terminated slice of bytes // ByteSliceFromString returns a NUL-terminated slice of bytes
// containing the text of s. If s contains a NUL byte at any // containing the text of s. If s contains a NUL byte at any
// location, it returns (nil, EINVAL). // location, it returns (nil, EINVAL).
@@ -65,3 +67,8 @@ func (ts *Timespec) Nano() int64 {
func (tv *Timeval) Nano() int64 { func (tv *Timeval) Nano() int64 {
return int64(tv.Sec)*1e9 + int64(tv.Usec)*1000 return int64(tv.Sec)*1e9 + int64(tv.Usec)*1000
} }
// use is a no-op, but the compiler cannot see that it is.
// Calling use(p) ensures that p is kept live until that point.
//go:noescape
func use(p unsafe.Pointer)