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https://github.com/golang/go
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4fd41e494a
Permit system calls to be designated as non-blocking, meaning that we simply call them without involving the scheduler. This change by itself is mostly performance neutral. In combination with a following change to the net package there is a performance advantage. R=rsc, dfc, r2, iant2, rsc1 CC=golang-dev https://golang.org/cl/4278055
42 lines
1.1 KiB
Go
42 lines
1.1 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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package syscall
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func Getpagesize() int { return 4096 }
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func TimespecToNsec(ts Timespec) int64 { return int64(ts.Sec)*1e9 + int64(ts.Nsec) }
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func NsecToTimespec(nsec int64) (ts Timespec) {
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ts.Sec = int32(nsec / 1e9)
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ts.Nsec = int32(nsec % 1e9)
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return
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}
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func TimevalToNsec(tv Timeval) int64 { return int64(tv.Sec)*1e9 + int64(tv.Usec)*1e3 }
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func NsecToTimeval(nsec int64) (tv Timeval) {
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nsec += 999 // round up to microsecond
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tv.Usec = int32(nsec % 1e9 / 1e3)
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tv.Sec = int32(nsec / 1e9)
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return
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}
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//sysnb gettimeofday(tp *Timeval) (sec int32, usec int32, errno int)
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func Gettimeofday(tv *Timeval) (errno int) {
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// The tv passed to gettimeofday must be non-nil
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// but is otherwise unused. The answers come back
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// in the two registers.
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sec, usec, err := gettimeofday(tv)
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tv.Sec = int32(sec)
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tv.Usec = int32(usec)
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return err
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}
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func SetKevent(k *Kevent_t, fd, mode, flags int) {
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k.Ident = uint32(fd)
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k.Filter = int16(mode)
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k.Flags = uint16(flags)
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}
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