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syscall: implement Sendfile for Darwin.

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Update #5847
Summary: syscall: implement Sendfile for OpenBSD and NetBSD

R=golang-dev, rsc, dave
CC=golang-dev
https://golang.org/cl/10980043
This commit is contained in:
Shenghou Ma 2013-07-12 04:34:54 +08:00
parent 555e51f27b
commit 72faa4bc51
4 changed files with 33 additions and 5 deletions
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1
doc/go1.2.txt
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@ -23,4 +23,5 @@ go/build: support including C++ code with cgo (CL 8248043).
io: Copy prioritizes WriterTo over ReaderFrom (CL 9462044).
net: new build tag netgo for building a pure Go net package (CL 7100050).
sort: new Stable function provides stable sort (CL 9612044).
syscall: implemented Sendfile for Darwin, added Syscall9 for Darwin/amd64 (CL 10980043).
testing: AllocsPerRun is now quantized to an integer (the type is still float64) (CL 9837049).

5
src/pkg/syscall/syscall_darwin.go
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@ -96,11 +96,6 @@ func Pipe(p []int) (err error) {
return
}
// TODO
func sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
return -1, ENOSYS
}
/*
* Wrapped
*/

15
src/pkg/syscall/syscall_darwin_386.go
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@ -4,6 +4,8 @@
package syscall
import "unsafe"
func Getpagesize() int { return 4096 }
func TimespecToNsec(ts Timespec) int64 { return int64(ts.Sec)*1e9 + int64(ts.Nsec) }
@ -52,4 +54,17 @@ func (cmsg *Cmsghdr) SetLen(length int) {
cmsg.Len = uint32(length)
}
func sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
var length = uint64(count)
_, _, e1 := Syscall9(SYS_SENDFILE, uintptr(infd), uintptr(outfd), uintptr(*offset), uintptr(*offset>>32), uintptr(unsafe.Pointer(&length)), 0, 0, 0, 0)
written = int(length)
if e1 != 0 {
err = e1
}
return
}
func Syscall9(num, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno) // sic

17
src/pkg/syscall/syscall_darwin_amd64.go
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@ -4,6 +4,8 @@
package syscall
import "unsafe"
func Getpagesize() int { return 4096 }
func TimespecToNsec(ts Timespec) int64 { return int64(ts.Sec)*1e9 + int64(ts.Nsec) }
@ -51,3 +53,18 @@ func (msghdr *Msghdr) SetControllen(length int) {
func (cmsg *Cmsghdr) SetLen(length int) {
cmsg.Len = uint32(length)
}
func sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
var length = uint64(count)
_, _, e1 := Syscall6(SYS_SENDFILE, uintptr(infd), uintptr(outfd), uintptr(*offset), uintptr(unsafe.Pointer(&length)), 0, 0)
written = int(length)
if e1 != 0 {
err = e1
}
return
}
func Syscall9(num, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno) // sic