// Copyright 2022 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 provides the syscall primitives required for the runtime. package syscall import ( "unsafe" ) // TODO(https://go.dev/issue/51087): This package is incomplete and currently // only contains very minimal support for Linux. // Syscall6 calls system call number 'num' with arguments a1-6. func Syscall6(num, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, errno uintptr) func EpollCreate1(flags int32) (fd int32, errno uintptr) { r1, _, e := Syscall6(SYS_EPOLL_CREATE1, uintptr(flags), 0, 0, 0, 0, 0) return int32(r1), e } var _zero uintptr func EpollWait(epfd int32, events []EpollEvent, maxev, waitms int32) (n int32, errno uintptr) { var ev unsafe.Pointer if len(events) > 0 { ev = unsafe.Pointer(&events[0]) } else { ev = unsafe.Pointer(&_zero) } r1, _, e := Syscall6(SYS_EPOLL_PWAIT, uintptr(epfd), uintptr(ev), uintptr(maxev), uintptr(waitms), 0, 0) return int32(r1), e } func EpollCtl(epfd, op, fd int32, event *EpollEvent) (errno uintptr) { _, _, e := Syscall6(SYS_EPOLL_CTL, uintptr(epfd), uintptr(op), uintptr(fd), uintptr(unsafe.Pointer(event)), 0, 0) return e } func Eventfd(initval, flags int32) (fd int32, errno uintptr) { r1, _, e := Syscall6(SYS_EVENTFD2, uintptr(initval), uintptr(flags), 0, 0, 0, 0) return int32(r1), e }