mirror of
https://github.com/golang/go
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101 lines
2.5 KiB
Go
101 lines
2.5 KiB
Go
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// 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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import (
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"syscall";
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"unsafe";
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)
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func Getpagesize() int {
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return 4096
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}
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func TimespecToNsec(ts Timespec) int64 {
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return int64(ts.Sec)*1e9 + int64(ts.Nsec);
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}
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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 {
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return int64(tv.Sec)*1e9 + int64(tv.Usec)*1e3;
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}
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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.Sec = int32(nsec/1e9);
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tv.Usec = int32(nsec%1e9 / 1e3);
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return;
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}
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// On x86 Linux, all the socket calls go through an extra indirection,
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// I think because the 5-register system call interface can't handle
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// the 6-argument calls like sendto and recvfrom. Instead the
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// arguments to the underlying system call are the number below
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// and a pointer to an array of uintptr. We hide the pointer in the
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// socketcall assembly to avoid allocation on every system call.
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const (
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// see linux/net.h
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_SOCKET = 1;
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_BIND = 2;
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_CONNECT = 3;
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_LISTEN = 4;
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_ACCEPT = 5;
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_GETSOCKNAME = 6;
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_GETPEERNAME = 7;
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_SOCKETPAIR = 8;
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_SEND = 9;
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_RECV = 10;
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_SENDTO = 11;
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_RECVFROM = 12;
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_SHUTDOWN = 13;
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_SETSOCKOPT = 14;
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_GETSOCKOPT = 15;
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_SENDMSG = 16;
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_RECVMSG = 17;
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)
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func socketcall(call int, a0, a1, a2, a3, a4, a5 uintptr) (n int, errno int)
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func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, errno int) {
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fd, errno = socketcall(_SOCKET, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0);
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return;
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}
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func bind(s int, addr uintptr, addrlen _Socklen) (errno int) {
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var _ int;
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_, errno = socketcall(_BIND, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0);
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return;
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}
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func connect(s int, addr uintptr, addrlen _Socklen) (errno int) {
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var _ int;
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_, errno = socketcall(_CONNECT, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0);
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return;
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}
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func socket(domain int, typ int, proto int) (fd int, errno int) {
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fd, errno = socketcall(_SOCKET, uintptr(domain), uintptr(typ), uintptr(proto), 0, 0, 0);
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return;
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}
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func setsockopt(s int, level int, name int, val uintptr, vallen int) (errno int) {
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var _ int;
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_, errno = socketcall(_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0);
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return;
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}
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func Listen(s int, n int) (errno int) {
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var _ int;
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_, errno = socketcall(_LISTEN, uintptr(s), uintptr(n), 0, 0, 0, 0);
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return;
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}
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