Package ej.wasi.io.event

Class Selector

java.lang.Object

ej.wasi.io.event.Selector

All Implemented Interfaces:

WasiConstants

public class Selector
extends Object
implements WasiConstants

WasiIO selector.

Field Summary

Fields inherited from interface ej.wasi.WasiConstants

AF_INET, AF_INET6, BLOCKING_CONNECT_TIMEOUT, BUFFERED_INPUT_STREAM_SIZE, CLOCK_MONOTONIC, CLOCK_REALTIME, DIRENT_COOKIE_OFFSET, DIRENT_ENTRY_NAME_LENGTH_OFFSET, DIRENT_FILE_TYPE_OFFSET, DIRENT_INODE_OFFSET, DIRENT_SIZE, ERRNO_ACCES, ERRNO_ADDRINUSE, ERRNO_ADDRNOTAVAIL, ERRNO_AFNOSUPPORT, ERRNO_AGAIN, ERRNO_BADF, ERRNO_CONNREFUSED, ERRNO_EXIST, ERRNO_FAULT, ERRNO_HOSTUNREACH, ERRNO_INPROGRESS, ERRNO_INTR, ERRNO_INVAL, ERRNO_IO, ERRNO_ISCONN, ERRNO_ISDIR, ERRNO_MSGSIZE, ERRNO_NAMETOOLONG, ERRNO_NOENT, ERRNO_NOMEM, ERRNO_NOSYS, ERRNO_NOTCONN, ERRNO_NOTDIR, ERRNO_NOTEMPTY, ERRNO_NOTSOCK, ERRNO_NOTSUP, ERRNO_OVERFLOW, ERRNO_SPIPE, ERRNO_SUCCESS, EVENT_AVAILABLE_BYTE_OFFSET, EVENT_ERROR_OFFSET, EVENT_EVENT_TYPE_OFFSET, EVENT_READ_WRITE_HANGUP_OFFSET, EVENT_SIZE, EVENT_USER_DATA_OFFSET, FDFLAGS_APPEND_MASK, FDFLAGS_NON_BLOCK_MASK, FDSTAT_BASE_RIGHTS_OFFSET, FDSTAT_FILE_TYPE_OFFSET, FDSTAT_FLAGS_OFFSET, FDSTAT_INHERITING_RIGHTS_OFFSET, FILESTAT_FILESIZE_OFFSET, FILESTAT_FILETYPE_OFFSET, FILESTAT_INODE_OFFSET, FILESTAT_LAST_MODIFIED_TIME_OFFSET, IFF_LOOPBACK, IFF_RUNNING, IFF_UP, IOVEC_BUFFER_INDEX, IOVEC_BUFFER_LENGTH_INDEX, IOVEC_SIZE, IP_ADD_MEMBERSHIP, IP_DROP_MEMBERSHIP, IP_MULTICAST_IF, IP_MULTICAST_LOOP, IP_MULTICAST_TTL, IP_TTL, IPPROTO_IP, IPPROTO_IPV6, IPv4AddressSize, IPV6_JOIN_GROUP, IPV6_LEAVE_GROUP, IPV6_MULTICAST_HOPS, IPV6_MULTICAST_IF, IPV6_MULTICAST_LOOP, IPV6_UNICAST_HOPS, IPv6AddressSize, LOOKUPFLAGS_SYMLINK_FOLLOW_MASK, MILLIS_TO_NANO, NON_BLOCKING_TIMEOUT, OFLAGS_CREAT_MASK, OFLAGS_DIRECTORY_MASK, OFLAGS_EXCL_MASK, OFLAGS_TRUNC_MASK, POLLING_TIMEOUT, PREOPENTYPE_DIR, PREOPENTYPE_UNKNOWN, PRESTAT_PREOPEN_DIRNAME_OFFSET, PRESTAT_PREOPEN_TAG_OFFSET, RIFLAGS_MSG_PEEK_MASK, RIFLAGS_WAITALL_MASK, RIGHTS_ALL, RIGHTS_DIR, SDFLAGS_READ, SDFLAGS_WRITE, SO_BROADCAST, SO_RCVBUF, SO_REUSEADDR, SO_SNDBUF, SOCK_CLOEXEC, SOCK_NONBLOCK, SOCKET_LEVEL, UDP_PEEK_BUFFER_MAX_SIZE

Constructor Summary

Constructors

Constructor	Description
Selector(List<SubscriptionIO> subIOs, SubscriptionClock subTimeout, WasiIORegistry ioRegistry)	Creates a new Selector.

Method Summary

Modifier and Type	Method	Description
int	select(byte[] memory, int outEventPtr, int nbOccuredEventPtr)	Select the subscription events whose the associated files descriptors are ready.

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Selector

public Selector(List<SubscriptionIO> subIOs,
                @Nullable
                SubscriptionClock subTimeout,
                WasiIORegistry ioRegistry)

Creates a new Selector.

Parameters:

subIOs - the subscription I/O events.

subTimeout - the select timeout event.

ioRegistry - the registry used to look up a WasiIO by file descriptor.

Method Detail

select

public int select(byte[] memory,
                  int outEventPtr,
                  int nbOccuredEventPtr)

Select the subscription events whose the associated files descriptors are ready.

Parameters:

memory - the memory to be used to write the selected event result.

outEventPtr - the start offset in the memory to write the selected event result.

nbOccuredEventPtr - the offset in the memory to write the number of event selected.

Returns:

WasiConstants.ERRNO_SUCCESS on success, or an ERRNO value on error (see WasiConstants).