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Diffstat (limited to 'src/syscall/syscall.go')
-rw-r--r-- | src/syscall/syscall.go | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/syscall/syscall.go b/src/syscall/syscall.go new file mode 100644 index 0000000000..3fd95798f3 --- /dev/null +++ b/src/syscall/syscall.go @@ -0,0 +1,88 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package syscall contains an interface to the low-level operating system +// primitives. The details vary depending on the underlying system, and +// by default, godoc will display the syscall documentation for the current +// system. If you want godoc to display syscall documentation for another +// system, set $GOOS and $GOARCH to the desired system. For example, if +// you want to view documentation for freebsd/arm on linux/amd64, set $GOOS +// to freebsd and $GOARCH to arm. +// The primary use of syscall is inside other packages that provide a more +// portable interface to the system, such as "os", "time" and "net". Use +// those packages rather than this one if you can. +// For details of the functions and data types in this package consult +// the manuals for the appropriate operating system. +// These calls return err == nil to indicate success; otherwise +// err is an operating system error describing the failure. +// On most systems, that error has type syscall.Errno. +// +// NOTE: This package is locked down. Code outside the standard +// Go repository should be migrated to use the corresponding +// package in the go.sys subrepository. That is also where updates +// required by new systems or versions should be applied. +// See https://golang.org/s/go1.4-syscall for more information. +// +package syscall + +// StringByteSlice is deprecated. Use ByteSliceFromString instead. +// If s contains a NUL byte this function panics instead of +// returning an error. +func StringByteSlice(s string) []byte { + a, err := ByteSliceFromString(s) + if err != nil { + panic("syscall: string with NUL passed to StringByteSlice") + } + return a +} + +// ByteSliceFromString returns a NUL-terminated slice of bytes +// containing the text of s. If s contains a NUL byte at any +// location, it returns (nil, EINVAL). +func ByteSliceFromString(s string) ([]byte, error) { + for i := 0; i < len(s); i++ { + if s[i] == 0 { + return nil, EINVAL + } + } + a := make([]byte, len(s)+1) + copy(a, s) + return a, nil +} + +// StringBytePtr is deprecated. Use BytePtrFromString instead. +// If s contains a NUL byte this function panics instead of +// returning an error. +func StringBytePtr(s string) *byte { return &StringByteSlice(s)[0] } + +// BytePtrFromString returns a pointer to a NUL-terminated array of +// bytes containing the text of s. If s contains a NUL byte at any +// location, it returns (nil, EINVAL). +func BytePtrFromString(s string) (*byte, error) { + a, err := ByteSliceFromString(s) + if err != nil { + return nil, err + } + return &a[0], nil +} + +// Single-word zero for use when we need a valid pointer to 0 bytes. +// See mksyscall.pl. +var _zero uintptr + +func (ts *Timespec) Unix() (sec int64, nsec int64) { + return int64(ts.Sec), int64(ts.Nsec) +} + +func (tv *Timeval) Unix() (sec int64, nsec int64) { + return int64(tv.Sec), int64(tv.Usec) * 1000 +} + +func (ts *Timespec) Nano() int64 { + return int64(ts.Sec)*1e9 + int64(ts.Nsec) +} + +func (tv *Timeval) Nano() int64 { + return int64(tv.Sec)*1e9 + int64(tv.Usec)*1000 +} |