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📁 ..
📄 .gitignore(16 B)
📄 README.md(8.48 KB)
📄 affinity_linux.go(1.88 KB)
📄 aliases.go(396 B)
📄 asm_aix_ppc64.s(407 B)
📄 asm_bsd_386.s(696 B)
📄 asm_bsd_amd64.s(722 B)
📄 asm_bsd_arm.s(686 B)
📄 asm_bsd_arm64.s(709 B)
📄 asm_bsd_ppc64.s(716 B)
📄 asm_bsd_riscv64.s(711 B)
📄 asm_linux_386.s(1.44 KB)
📄 asm_linux_amd64.s(1.18 KB)
📄 asm_linux_arm.s(1.11 KB)
📄 asm_linux_arm64.s(1.08 KB)
📄 asm_linux_loong64.s(1.16 KB)
📄 asm_linux_mips64x.s(1.14 KB)
📄 asm_linux_mipsx.s(1.14 KB)
📄 asm_linux_ppc64x.s(909 B)
📄 asm_linux_riscv64.s(1.02 KB)
📄 asm_linux_s390x.s(1.12 KB)
📄 asm_openbsd_mips64.s(677 B)
📄 asm_solaris_amd64.s(423 B)
📄 asm_zos_s390x.s(8.4 KB)
📄 bluetooth_linux.go(680 B)
📄 cap_freebsd.go(5.01 KB)
📄 constants.go(318 B)
📄 dev_aix_ppc.go(739 B)
📄 dev_aix_ppc64.go(858 B)
📄 dev_darwin.go(747 B)
📄 dev_dragonfly.go(1.01 KB)
📄 dev_freebsd.go(1013 B)
📄 dev_linux.go(1.54 KB)
📄 dev_netbsd.go(913 B)
📄 dev_openbsd.go(918 B)
📄 dev_zos.go(830 B)
📄 dirent.go(3.01 KB)
📄 endian_big.go(330 B)
📄 endian_little.go(358 B)
📄 env_unix.go(645 B)
📄 epoll_zos.go(5.02 KB)
📄 fcntl.go(1.05 KB)
📄 fcntl_darwin.go(806 B)
📄 fcntl_linux_32bit.go(436 B)
📄 fdset.go(781 B)
📄 fstatfs_zos.go(4.07 KB)
📄 gccgo.go(1.91 KB)
📄 gccgo_c.c(1.49 KB)
📄 gccgo_linux_amd64.go(436 B)
📄 ifreq_linux.go(4.27 KB)
📄 ioctl_linux.go(8.07 KB)
📄 ioctl_signed.go(2.2 KB)
📄 ioctl_unsigned.go(2.26 KB)
📄 ioctl_zos.go(2.03 KB)
📄 mkall.sh(8.11 KB)
📄 mkerrors.sh(19.56 KB)
📄 mmap_nomremap.go(336 B)
📄 mremap.go(1.36 KB)
📄 pagesize_unix.go(389 B)
📄 pledge_openbsd.go(2.33 KB)
📄 ptrace_darwin.go(315 B)
📄 ptrace_ios.go(284 B)
📄 race.go(629 B)
📄 race0.go(553 B)
📄 readdirent_getdents.go(401 B)
📄 readdirent_getdirentries.go(698 B)
📄 sockcmsg_dragonfly.go(544 B)
📄 sockcmsg_linux.go(2.6 KB)
📄 sockcmsg_unix.go(3.14 KB)
📄 sockcmsg_unix_other.go(1.2 KB)
📄 syscall.go(2.81 KB)
📄 syscall_aix.go(16.1 KB)
📄 syscall_aix_ppc.go(1.27 KB)
📄 syscall_aix_ppc64.go(1.9 KB)
📄 syscall_bsd.go(14.96 KB)
📄 syscall_darwin.go(20.72 KB)
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📄 syscall_darwin_arm64.go(1.41 KB)
📄 syscall_darwin_libSystem.go(1.21 KB)
📄 syscall_dragonfly.go(11.18 KB)
📄 syscall_dragonfly_amd64.go(1.25 KB)
📄 syscall_freebsd.go(15.34 KB)
📄 syscall_freebsd_386.go(1.48 KB)
📄 syscall_freebsd_amd64.go(1.44 KB)
📄 syscall_freebsd_arm.go(1.35 KB)
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📄 syscall_freebsd_riscv64.go(1.32 KB)
📄 syscall_hurd.go(635 B)
📄 syscall_hurd_386.go(447 B)
📄 syscall_illumos.go(1.76 KB)
📄 syscall_linux.go(74.41 KB)
📄 syscall_linux_386.go(8.88 KB)
📄 syscall_linux_alarm.go(440 B)
📄 syscall_linux_amd64.go(5.28 KB)
📄 syscall_linux_amd64_gc.go(290 B)
📄 syscall_linux_arm.go(6.94 KB)
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📄 syscall_linux_gc.go(495 B)
📄 syscall_linux_gc_386.go(585 B)
📄 syscall_linux_gc_arm.go(411 B)
📄 syscall_linux_gccgo_386.go(986 B)
📄 syscall_linux_gccgo_arm.go(596 B)
📄 syscall_linux_loong64.go(6.66 KB)
📄 syscall_linux_mips64x.go(5.83 KB)
📄 syscall_linux_mipsx.go(5.81 KB)
📄 syscall_linux_ppc.go(6.85 KB)
📄 syscall_linux_ppc64x.go(4.98 KB)
📄 syscall_linux_riscv64.go(6.13 KB)
📄 syscall_linux_s390x.go(9.29 KB)
📄 syscall_linux_sparc64.go(4.37 KB)
📄 syscall_netbsd.go(12.35 KB)
📄 syscall_netbsd_386.go(819 B)
📄 syscall_netbsd_amd64.go(814 B)
📄 syscall_netbsd_arm.go(819 B)
📄 syscall_netbsd_arm64.go(814 B)
📄 syscall_openbsd.go(11.04 KB)
📄 syscall_openbsd_386.go(1000 B)
📄 syscall_openbsd_amd64.go(990 B)
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📄 syscall_openbsd_arm64.go(990 B)
📄 syscall_openbsd_libc.go(1.1 KB)
📄 syscall_openbsd_mips64.go(955 B)
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📄 syscall_solaris.go(31.11 KB)
📄 syscall_solaris_amd64.go(593 B)
📄 syscall_unix.go(16.45 KB)
📄 syscall_unix_gc.go(640 B)
📄 syscall_unix_gc_ppc64x.go(786 B)
📄 syscall_zos_s390x.go(52.88 KB)
📄 sysvshm_linux.go(521 B)
📄 sysvshm_unix.go(1.42 KB)
📄 sysvshm_unix_other.go(398 B)
📄 timestruct.go(2.2 KB)
📄 unveil_openbsd.go(1.19 KB)
📄 xattr_bsd.go(5.66 KB)
📄 zerrors_aix_ppc.go(52.42 KB)
📄 zerrors_aix_ppc64.go(52.67 KB)
📄 zerrors_darwin_amd64.go(87.45 KB)
📄 zerrors_darwin_arm64.go(87.45 KB)
📄 zerrors_dragonfly_amd64.go(70.7 KB)
📄 zerrors_freebsd_386.go(79.55 KB)
📄 zerrors_freebsd_amd64.go(79.44 KB)
📄 zerrors_freebsd_arm.go(79.19 KB)
📄 zerrors_freebsd_arm64.go(79.22 KB)
📄 zerrors_freebsd_riscv64.go(83.75 KB)
📄 zerrors_linux.go(180.01 KB)
📄 zerrors_linux_386.go(33.98 KB)
📄 zerrors_linux_amd64.go(34 KB)
📄 zerrors_linux_arm.go(34.22 KB)
📄 zerrors_linux_arm64.go(34.05 KB)
📄 zerrors_linux_loong64.go(33.73 KB)
📄 zerrors_linux_mips.go(34.54 KB)
📄 zerrors_linux_mips64.go(34.54 KB)
📄 zerrors_linux_mips64le.go(34.55 KB)
📄 zerrors_linux_mipsle.go(34.54 KB)
📄 zerrors_linux_ppc.go(36.62 KB)
📄 zerrors_linux_ppc64.go(36.79 KB)
📄 zerrors_linux_ppc64le.go(36.8 KB)
📄 zerrors_linux_riscv64.go(33.59 KB)
📄 zerrors_linux_s390x.go(36.53 KB)
📄 zerrors_linux_sparc64.go(38.61 KB)
📄 zerrors_netbsd_386.go(72.76 KB)
📄 zerrors_netbsd_amd64.go(72.35 KB)
📄 zerrors_netbsd_arm.go(71.89 KB)
📄 zerrors_netbsd_arm64.go(72.35 KB)
📄 zerrors_openbsd_386.go(78.55 KB)
📄 zerrors_openbsd_amd64.go(78.55 KB)
📄 zerrors_openbsd_arm.go(78.54 KB)
📄 zerrors_openbsd_arm64.go(78.55 KB)
📄 zerrors_openbsd_mips64.go(78.55 KB)
📄 zerrors_openbsd_ppc64.go(78.51 KB)
📄 zerrors_openbsd_riscv64.go(78.47 KB)
📄 zerrors_solaris_amd64.go(59 KB)
📄 zerrors_zos_s390x.go(34.47 KB)
📄 zptrace_armnn_linux.go(1.17 KB)
📄 zptrace_linux_arm64.go(721 B)
📄 zptrace_mipsnn_linux.go(1.36 KB)
📄 zptrace_mipsnnle_linux.go(1.41 KB)
📄 zptrace_x86_linux.go(1.81 KB)
📄 zsyscall_aix_ppc.go(35.68 KB)
📄 zsyscall_aix_ppc64.go(30.04 KB)
📄 zsyscall_aix_ppc64_gc.go(42.43 KB)
📄 zsyscall_aix_ppc64_gccgo.go(30.85 KB)
📄 zsyscall_darwin_amd64.go(66.74 KB)
📄 zsyscall_darwin_amd64.s(29.28 KB)
📄 zsyscall_darwin_arm64.go(66.69 KB)
📄 zsyscall_darwin_arm64.s(29.21 KB)
📄 zsyscall_dragonfly_amd64.go(38.79 KB)
📄 zsyscall_freebsd_386.go(45.09 KB)
📄 zsyscall_freebsd_amd64.go(44.9 KB)
📄 zsyscall_freebsd_arm.go(45.13 KB)
📄 zsyscall_freebsd_arm64.go(44.9 KB)
📄 zsyscall_freebsd_riscv64.go(44.91 KB)
📄 zsyscall_illumos_amd64.go(2.63 KB)
📄 zsyscall_linux.go(54.29 KB)
📄 zsyscall_linux_386.go(12.11 KB)
📄 zsyscall_linux_amd64.go(16.5 KB)
📄 zsyscall_linux_arm.go(15.61 KB)
📄 zsyscall_linux_arm64.go(14.22 KB)
📄 zsyscall_linux_loong64.go(12.61 KB)
📄 zsyscall_linux_mips.go(16.76 KB)
📄 zsyscall_linux_mips64.go(16.27 KB)
📄 zsyscall_linux_mips64le.go(16.01 KB)
📄 zsyscall_linux_mipsle.go(16.76 KB)
📄 zsyscall_linux_ppc.go(16.83 KB)
📄 zsyscall_linux_ppc64.go(17.79 KB)
📄 zsyscall_linux_ppc64le.go(17.79 KB)
📄 zsyscall_linux_riscv64.go(14.2 KB)
📄 zsyscall_linux_s390x.go(12.11 KB)
📄 zsyscall_linux_sparc64.go(16.43 KB)
📄 zsyscall_netbsd_386.go(44.13 KB)
📄 zsyscall_netbsd_amd64.go(43.94 KB)
📄 zsyscall_netbsd_arm.go(44.13 KB)
📄 zsyscall_netbsd_arm64.go(43.94 KB)
📄 zsyscall_openbsd_386.go(57.67 KB)
📄 zsyscall_openbsd_386.s(26.7 KB)
📄 zsyscall_openbsd_amd64.go(57.52 KB)
📄 zsyscall_openbsd_amd64.s(26.7 KB)
📄 zsyscall_openbsd_arm.go(57.69 KB)
📄 zsyscall_openbsd_arm.s(26.7 KB)
📄 zsyscall_openbsd_arm64.go(57.52 KB)
📄 zsyscall_openbsd_arm64.s(26.7 KB)
📄 zsyscall_openbsd_mips64.go(57.52 KB)
📄 zsyscall_openbsd_mips64.s(26.7 KB)
📄 zsyscall_openbsd_ppc64.go(57.52 KB)
📄 zsyscall_openbsd_ppc64.s(27.51 KB)
📄 zsyscall_openbsd_riscv64.go(57.53 KB)
📄 zsyscall_openbsd_riscv64.s(26.7 KB)
📄 zsyscall_solaris_amd64.go(59.74 KB)
📄 zsyscall_zos_s390x.go(29.82 KB)
📄 zsysctl_openbsd_386.go(11.93 KB)
📄 zsysctl_openbsd_amd64.go(11.93 KB)
📄 zsysctl_openbsd_arm.go(11.93 KB)
📄 zsysctl_openbsd_arm64.go(11.93 KB)
📄 zsysctl_openbsd_mips64.go(11.93 KB)
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📄 zsysnum_darwin_amd64.go(17.84 KB)
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📄 zsysnum_dragonfly_amd64.go(27.61 KB)
📄 zsysnum_freebsd_386.go(36.09 KB)
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📄 zsysnum_freebsd_arm64.go(36.1 KB)
📄 zsysnum_freebsd_riscv64.go(36.1 KB)
📄 zsysnum_linux_386.go(17.38 KB)
📄 zsysnum_linux_amd64.go(12.59 KB)
📄 zsysnum_linux_arm.go(15.99 KB)
📄 zsysnum_linux_arm64.go(10.69 KB)
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📄 zsysnum_linux_mips64.go(12.74 KB)
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📄 zsysnum_linux_ppc64le.go(13.96 KB)
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📄 zsysnum_netbsd_386.go(25.72 KB)
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📄 zsysnum_netbsd_arm64.go(25.71 KB)
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📄 zsysnum_openbsd_ppc64.go(17.76 KB)
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📄 zsysnum_zos_s390x.go(116.99 KB)
📄 ztypes_aix_ppc.go(4.91 KB)
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📄 ztypes_zos_s390x.go(6.66 KB)

Editing: epoll_zos.go

// Copyright 2020 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.

//go:build zos && s390x

package unix

import (
	"sync"
)

// This file simulates epoll on z/OS using poll.

// Analogous to epoll_event on Linux.
// TODO(neeilan): Pad is because the Linux kernel expects a 96-bit struct. We never pass this to the kernel; remove?
type EpollEvent struct {
	Events uint32
	Fd     int32
	Pad    int32
}

const (
	EPOLLERR      = 0x8
	EPOLLHUP      = 0x10
	EPOLLIN       = 0x1
	EPOLLMSG      = 0x400
	EPOLLOUT      = 0x4
	EPOLLPRI      = 0x2
	EPOLLRDBAND   = 0x80
	EPOLLRDNORM   = 0x40
	EPOLLWRBAND   = 0x200
	EPOLLWRNORM   = 0x100
	EPOLL_CTL_ADD = 0x1
	EPOLL_CTL_DEL = 0x2
	EPOLL_CTL_MOD = 0x3
	// The following constants are part of the epoll API, but represent
	// currently unsupported functionality on z/OS.
	// EPOLL_CLOEXEC  = 0x80000
	// EPOLLET        = 0x80000000
	// EPOLLONESHOT   = 0x40000000
	// EPOLLRDHUP     = 0x2000     // Typically used with edge-triggered notis
	// EPOLLEXCLUSIVE = 0x10000000 // Exclusive wake-up mode
	// EPOLLWAKEUP    = 0x20000000 // Relies on Linux's BLOCK_SUSPEND capability
)

// TODO(neeilan): We can eliminate these epToPoll / pToEpoll calls by using identical mask values for POLL/EPOLL
// constants where possible The lower 16 bits of epoll events (uint32) can fit any system poll event (int16).

// epToPollEvt converts epoll event field to poll equivalent.
// In epoll, Events is a 32-bit field, while poll uses 16 bits.
func epToPollEvt(events uint32) int16 {
	var ep2p = map[uint32]int16{
		EPOLLIN:  POLLIN,
		EPOLLOUT: POLLOUT,
		EPOLLHUP: POLLHUP,
		EPOLLPRI: POLLPRI,
		EPOLLERR: POLLERR,
	}

var pollEvts int16 = 0
	for epEvt, pEvt := range ep2p {
		if (events & epEvt) != 0 {
			pollEvts |= pEvt
		}
	}

return pollEvts
}

// pToEpollEvt converts 16 bit poll event bitfields to 32-bit epoll event fields.
func pToEpollEvt(revents int16) uint32 {
	var p2ep = map[int16]uint32{
		POLLIN:  EPOLLIN,
		POLLOUT: EPOLLOUT,
		POLLHUP: EPOLLHUP,
		POLLPRI: EPOLLPRI,
		POLLERR: EPOLLERR,
	}

var epollEvts uint32 = 0
	for pEvt, epEvt := range p2ep {
		if (revents & pEvt) != 0 {
			epollEvts |= epEvt
		}
	}

return epollEvts
}

// Per-process epoll implementation.
type epollImpl struct {
	mu       sync.Mutex
	epfd2ep  map[int]*eventPoll
	nextEpfd int
}

// eventPoll holds a set of file descriptors being watched by the process. A process can have multiple epoll instances.
// On Linux, this is an in-kernel data structure accessed through a fd.
type eventPoll struct {
	mu  sync.Mutex
	fds map[int]*EpollEvent
}

// epoll impl for this process.
var impl epollImpl = epollImpl{
	epfd2ep:  make(map[int]*eventPoll),
	nextEpfd: 0,
}

func (e *epollImpl) epollcreate(size int) (epfd int, err error) {
	e.mu.Lock()
	defer e.mu.Unlock()
	epfd = e.nextEpfd
	e.nextEpfd++

e.epfd2ep[epfd] = &eventPoll{
		fds: make(map[int]*EpollEvent),
	}
	return epfd, nil
}

func (e *epollImpl) epollcreate1(flag int) (fd int, err error) {
	return e.epollcreate(4)
}

func (e *epollImpl) epollctl(epfd int, op int, fd int, event *EpollEvent) (err error) {
	e.mu.Lock()
	defer e.mu.Unlock()

ep, ok := e.epfd2ep[epfd]
	if !ok {

return EBADF
	}

switch op {
	case EPOLL_CTL_ADD:
		// TODO(neeilan): When we make epfds and fds disjoint, detect epoll
		// loops here (instances watching each other) and return ELOOP.
		if _, ok := ep.fds[fd]; ok {
			return EEXIST
		}
		ep.fds[fd] = event
	case EPOLL_CTL_MOD:
		if _, ok := ep.fds[fd]; !ok {
			return ENOENT
		}
		ep.fds[fd] = event
	case EPOLL_CTL_DEL:
		if _, ok := ep.fds[fd]; !ok {
			return ENOENT
		}
		delete(ep.fds, fd)

}
	return nil
}

// Must be called while holding ep.mu
func (ep *eventPoll) getFds() []int {
	fds := make([]int, len(ep.fds))
	for fd := range ep.fds {
		fds = append(fds, fd)
	}
	return fds
}

func (e *epollImpl) epollwait(epfd int, events []EpollEvent, msec int) (n int, err error) {
	e.mu.Lock() // in [rare] case of concurrent epollcreate + epollwait
	ep, ok := e.epfd2ep[epfd]

if !ok {
		e.mu.Unlock()
		return 0, EBADF
	}

pollfds := make([]PollFd, 4)
	for fd, epollevt := range ep.fds {
		pollfds = append(pollfds, PollFd{Fd: int32(fd), Events: epToPollEvt(epollevt.Events)})
	}
	e.mu.Unlock()

n, err = Poll(pollfds, msec)
	if err != nil {
		return n, err
	}

i := 0
	for _, pFd := range pollfds {
		if pFd.Revents != 0 {
			events[i] = EpollEvent{Fd: pFd.Fd, Events: pToEpollEvt(pFd.Revents)}
			i++
		}

if i == n {
			break
		}
	}

return n, nil
}

func EpollCreate(size int) (fd int, err error) {
	return impl.epollcreate(size)
}

func EpollCreate1(flag int) (fd int, err error) {
	return impl.epollcreate1(flag)
}

func EpollCtl(epfd int, op int, fd int, event *EpollEvent) (err error) {
	return impl.epollctl(epfd, op, fd, event)
}

// Because EpollWait mutates events, the caller is expected to coordinate
// concurrent access if calling with the same epfd from multiple goroutines.
func EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) {
	return impl.epollwait(epfd, events, msec)
}

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