#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/select.h>
#include <sys/signalfd.h>
#include <sys/socket.h>
#include <sys/timerfd.h>
#include <sys/uio.h>
#include <sys/xattr.h>
#include <netinet/udp.h>
#include <linux/audit.h>
#include <linux/bpf.h>
#include <linux/can.h>

	_, err := setfsuid(uid)
	return err
}

func Signalfd(fd int, sigmask *Sigset_t, flags int) (newfd int, err error) {
	return signalfd(fd, sigmask, _C__NSIG/8, flags)
}

//sys	Setpriority(which int, who int, prio int) (err error)
//sys	Setxattr(path string, attr string, data []byte, flags int) (err error)

	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func signalfd(fd int, sigmask *Sigset_t, maskSize uintptr, flags int) (newfd int, err error) {
	r0, _, e1 := Syscall6(SYS_SIGNALFD4, uintptr(fd), uintptr(unsafe.Pointer(sigmask)), uintptr(maskSize), uintptr(flags), 0, 0)
	newfd = int(r0)

	// Signal is idempotent, once signaled the event stays signaled and
	// it immediately unblocks any goroutine waiting for this event.
	Signal()

	// Signaled returns a channel that is closed when the underlying event
	// has been signaled. Successive calls to Signaled return the same value.
	Signaled() <-chan struct{}

	// Name returns the name of the signal, useful for logging.

    def "can reuse signal"() {
        given:
        def signalCount = new AtomicInteger()

        when:
        start {
            while (signalCount.get() < 2) {
                def signaled = signal.await(10000)
                if (signaled) {
                    signalCount.incrementAndGet()
                }
            }
        }

        then:
        poll {
            assert signal.waiting
        }

    def "client receives signal when lock is released"() {
        def signaled = new AtomicBoolean()

        when:
        int port = handler.reservePort()
        handler.start(10) { signal ->
            signal.trigger()
        }

        client.reservePort()
        client.start(11) {}
        client.maybePingOwner(port, 10, "lock 1", 50000) {
            signaled.set(true)
        }

        then:
        poll {

		// so we still need to use a timeout with GetQueuedCompletionStatusEx.
		// TODO: Improve the Go scheduler to support non-blocking timers.
		signaled := netpollQueueTimer(delay)
		if signaled {
			// There is a small window between the SetWaitableTimer and the NtAssociateWaitCompletionPacket
			// where the timer can expire. We can return immediately in this case.
			return gList{}, 0
		}

        Result<T> result;
        while (!(result = query.run()).isSuccessful()) {
            if (timer.hasExpired()) {
                break;
            }
            boolean signaled = signal.await(backoffPeriodFor(++iteration));
            if (signaled) {
                iteration = 0;
            }
        }
        return result.getValue();
    }

    long backoffPeriodFor(int iteration) {

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package main

// This program hung when run under the C/C++ ThreadSanitizer.
// TSAN defers asynchronous signals until the signaled thread calls into libc.
// Since the Go runtime makes direct futex syscalls, Go runtime threads could
// run for an arbitrarily long time without triggering the libc interceptors.
// See https://golang.org/issue/18717.

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package main

// This program hung when run under the C/C++ ThreadSanitizer. TSAN defers
// asynchronous signals until the signaled thread calls into libc. The runtime's
// sysmon goroutine idles itself using direct usleep syscalls, so it could
// run for an arbitrarily long time without triggering the libc interceptors.
// See https://golang.org/issue/18717.