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unix: add Darwin support for clonefile syscalls

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This commit adds support for three Darwin-specific calls that accelerate
the copying of files:

* clonefile()
* clonefileat()
* fclonefileat()

Fixes golang/go#41366

Change-Id: I7e6c525fc23d8474ea85feff24314d3d672d87ed
Reviewed-on: https://go-review.googlesource.com/c/sys/+/254757
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Tobias Klauser <tobias.klauser@gmail.com>
This commit is contained in:
Stan Hu
2020-09-16 03:07:50 +00:00
committed by Ian Lance Taylor
parent 288bc346aa
commit 2334cc1a13
10 changed files with 476 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files
unix/zsyscall_darwin_amd64.go
+70
View File
@@ -958,6 +958,56 @@ func libc_close_trampoline()
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Clonefile(src string, dst string, flags int) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(src)
if err != nil {
return
}
var _p1 *byte
_p1, err = BytePtrFromString(dst)
if err != nil {
return
}
_, _, e1 := syscall_syscall(funcPC(libc_clonefile_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(flags))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
func libc_clonefile_trampoline()
//go:linkname libc_clonefile libc_clonefile
//go:cgo_import_dynamic libc_clonefile clonefile "/usr/lib/libSystem.B.dylib"
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Clonefileat(srcDirfd int, src string, dstDirfd int, dst string, flags int) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(src)
if err != nil {
return
}
var _p1 *byte
_p1, err = BytePtrFromString(dst)
if err != nil {
return
}
_, _, e1 := syscall_syscall6(funcPC(libc_clonefileat_trampoline), uintptr(srcDirfd), uintptr(unsafe.Pointer(_p0)), uintptr(dstDirfd), uintptr(unsafe.Pointer(_p1)), uintptr(flags), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
func libc_clonefileat_trampoline()
//go:linkname libc_clonefileat libc_clonefileat
//go:cgo_import_dynamic libc_clonefileat clonefileat "/usr/lib/libSystem.B.dylib"
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Dup(fd int) (nfd int, err error) {
r0, _, e1 := syscall_syscall(funcPC(libc_dup_trampoline), uintptr(fd), 0, 0)
nfd = int(r0)
@@ -1146,6 +1196,26 @@ func libc_fchownat_trampoline()
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Fclonefileat(srcDirfd int, dstDirfd int, dst string, flags int) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(dst)
if err != nil {
return
}
_, _, e1 := syscall_syscall6(funcPC(libc_fclonefileat_trampoline), uintptr(srcDirfd), uintptr(dstDirfd), uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0, 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
func libc_fclonefileat_trampoline()
//go:linkname libc_fclonefileat libc_fclonefileat
//go:cgo_import_dynamic libc_fclonefileat fclonefileat "/usr/lib/libSystem.B.dylib"
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Flock(fd int, how int) (err error) {
_, _, e1 := syscall_syscall(funcPC(libc_flock_trampoline), uintptr(fd), uintptr(how), 0)
if e1 != 0 {