SYS_FACCESSAT              = 509 // { int faccessat(int fd, char *path, int amode, \
	SYS_MQ_OPEN                = 510 // { mqd_t mq_open(const char * name, int oflag, \
	SYS_MQ_CLOSE               = 511 // { int mq_close(mqd_t mqdes); }
	SYS_MQ_UNLINK              = 512 // { int mq_unlink(const char *name); }
	SYS_MQ_GETATTR             = 513 // { int mq_getattr(mqd_t mqdes, \
	SYS_MQ_SETATTR             = 514 // { int mq_setattr(mqd_t mqdes, \

	SYS_MQ_OPEN                = 510 // { mqd_t mq_open(const char * name, int oflag, mode_t mode, struct mq_attr *attr); }
	SYS_MQ_CLOSE               = 511 // { int mq_close(mqd_t mqdes); }
	SYS_MQ_UNLINK              = 512 // { int mq_unlink(const char *name); }
	SYS_MQ_GETATTR             = 513 // { int mq_getattr(mqd_t mqdes, struct mq_attr *mqstat); }

	IN_UNMOUNT               = 0x00002000
	IN_Q_OVERFLOW            = 0x00004000
	IN_IGNORED               = 0x00008000
	IN_CLOSE                 = (IN_CLOSE_WRITE | IN_CLOSE_NOWRITE)
	IN_MOVE                  = (IN_MOVED_FROM | IN_MOVED_TO)
	IN_ALL_EVENTS            = (IN_ACCESS | IN_MODIFY | IN_ATTRIB |
		IN_CLOSE | IN_OPEN | IN_MOVE |
		IN_CREATE | IN_DELETE | IN_DELETE_SELF |
		IN_MOVE_SELF)
	IN_ONLYDIR                      = 0x01000000

)

// https://github.com/WebAssembly/WASI/blob/a2b96e81c0586125cc4dc79a5be0b78d9a059925/legacy/preview1/docs.md#-fd_closefd-fd---result-errno
//
//go:wasmimport wasi_snapshot_preview1 fd_close
//go:noescape
func fd_close(fd int32) Errno

// https://github.com/WebAssembly/WASI/blob/a2b96e81c0586125cc4dc79a5be0b78d9a059925/legacy/preview1/docs.md#-fd_filestat_set_sizefd-fd-size-filesize---result-errno
//

func BenchmarkSelectProdCons(b *testing.B) {
	const CallsPerSched = 1000
	procs := runtime.GOMAXPROCS(-1)
	N := int32(b.N / CallsPerSched)
	c := make(chan bool, 2*procs)
	myc := make(chan int, 128)
	myclose := make(chan bool)
	for p := 0; p < procs; p++ {
		go func() {
			// Producer: sends to myc.
			foo := 0
			// Intended to not fire during benchmarking.
			mytimer := time.After(time.Hour)

			return false
		}) {
			return
		}

		x.mode = novalue
		if check.recordTypes() {
			check.recordBuiltinType(call.Fun, makeSig(nil, x.typ))
		}

	case _Close:
		// close(c)
		if !underIs(x.typ, func(u Type) bool {
			uch, _ := u.(*Chan)
			if uch == nil {
				check.errorf(x, InvalidClose, invalidOp+"cannot close non-channel %s", x)
				return false
			}

			return false
		}) {
			return
		}

		x.mode = novalue
		if check.recordTypes() {
			check.recordBuiltinType(call.Fun, makeSig(nil, x.typ))
		}

	case _Close:
		// close(c)
		if !underIs(x.typ, func(u Type) bool {
			uch, _ := u.(*Chan)
			if uch == nil {
				check.errorf(x, InvalidClose, invalidOp+"cannot close non-channel %s", x)
				return false
			}