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unix: add Sysv shared memory support

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Implements proposed API from https://golang.org/issue/46084. I chose
`SysvShmDesc` since it's a clearer name than `SysvShm`. Initially supports Darwin and Linux.

Solaris support has a blocker (https://golang.org/issue/46084#issuecomment-836980018)

For golang/go#46084

Change-Id: Ied0f768a74c448254adc3315348417825a7ec63e
GitHub-Last-Rev: befbd7af6b2f838753ac163ef387cebdb7957467
GitHub-Pull-Request: golang/sys#110
Reviewed-on: https://go-review.googlesource.com/c/sys/+/327830
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
This commit is contained in:
Dustin Spicuzza
2021-09-30 14:19:18 +00:00
committed by Tobias Klauser
parent 39ccf1dd6f
commit 969570ce7c
29 changed files with 841 additions and 8 deletions
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unix/zsyscall_darwin_amd64.go
+59
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@@ -734,6 +734,65 @@ var libc_sendfile_trampoline_addr uintptr
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func shmat(id int, addr uintptr, flag int) (ret uintptr, err error) {
r0, _, e1 := syscall_syscall(libc_shmat_trampoline_addr, uintptr(id), uintptr(addr), uintptr(flag))
ret = uintptr(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
var libc_shmat_trampoline_addr uintptr
//go:cgo_import_dynamic libc_shmat shmat "/usr/lib/libSystem.B.dylib"
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func shmctl(id int, cmd int, buf *SysvShmDesc) (result int, err error) {
r0, _, e1 := syscall_syscall(libc_shmctl_trampoline_addr, uintptr(id), uintptr(cmd), uintptr(unsafe.Pointer(buf)))
result = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
var libc_shmctl_trampoline_addr uintptr
//go:cgo_import_dynamic libc_shmctl shmctl "/usr/lib/libSystem.B.dylib"
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func shmdt(addr uintptr) (err error) {
_, _, e1 := syscall_syscall(libc_shmdt_trampoline_addr, uintptr(addr), 0, 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
var libc_shmdt_trampoline_addr uintptr
//go:cgo_import_dynamic libc_shmdt shmdt "/usr/lib/libSystem.B.dylib"
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func shmget(key int, size int, flag int) (id int, err error) {
r0, _, e1 := syscall_syscall(libc_shmget_trampoline_addr, uintptr(key), uintptr(size), uintptr(flag))
id = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
var libc_shmget_trampoline_addr uintptr
//go:cgo_import_dynamic libc_shmget shmget "/usr/lib/libSystem.B.dylib"
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Access(path string, mode uint32) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)