Deno.flock | Runtime APIs

Manual

Runtime APIs

Go to LatestShow Unstable API

Cache

Canvas

Cloud

Deno.CronScheduleExpression

unstable

Deno.KvConsistencyLevel

Crypto

RsaHashedImportParams

RsaHashedKeyAlgorithm

RsaHashedKeyGenParams

HashAlgorithmIdentifier

Encoding

TextEncoderEncodeIntoResult

Errors

Deno.errors.AddrInUse

Deno.errors.AddrNotAvailable

Deno.errors.AlreadyExists

Deno.errors.BadResource

Deno.errors.BrokenPipe

Deno.errors.Busy

Deno.errors.ConnectionAborted

Deno.errors.ConnectionRefused

Deno.errors.ConnectionReset

Deno.errors.FilesystemLoop

Deno.errors.Http

Deno.errors.Interrupted

Deno.errors.InvalidData

Deno.errors.IsADirectory

Deno.errors.NetworkUnreachable

Deno.errors.NotADirectory

Deno.errors.NotConnected

Deno.errors.NotFound

Deno.errors.NotSupported

Deno.errors.PermissionDenied

Deno.errors.TimedOut

Deno.errors.UnexpectedEof

Deno.errors.WouldBlock

Deno.errors.WriteZero

Events

AddEventListenerOptions

PromiseRejectionEvent

PromiseRejectionEventInit

EventListenerOrEventListenerObject

Fetch

Deno.CreateHttpClientOptions

Deno.createHttpClient

FFI

Deno.UnsafePointerView

Deno.ForeignLibraryInterface

unstable

Deno.ForeignStatic

unstable

Deno.UnsafeCallbackDefinition

unstable

Deno.ConditionalAsync

unstable

Deno.FromForeignFunction

unstable

Deno.FromNativeParameterTypes

unstable

Deno.FromNativeResultType

unstable

Deno.FromNativeType

unstable

Deno.NativeBigIntType

unstable

Deno.NativeBooleanType

unstable

Deno.NativeBufferType

unstable

Deno.NativeFunctionType

Deno.NativeNumberType

unstable

Deno.NativePointerType

unstable

Deno.NativeResultType

unstable

Deno.NativeStructType

unstable

Deno.NativeType

unstable

Deno.NativeTypedFunction

unstable

Deno.NativeTypedPointer

Deno.StaticForeignLibraryInterface

unstable

Deno.StaticForeignSymbol

unstable

Deno.StaticForeignSymbolReturnType

unstable

Deno.ToNativeParameterTypes

unstable

Deno.ToNativeResultType

unstable

Deno.ToNativeType

unstable

Deno.UnsafeCallbackFunction

File

File System

Deno.WriteFileOptions

Deno.makeTempFileSync

Deno.readTextFileSync

Deno.writeTextFileSync

GPU

Deno.UnsafeWindowSurface

GPUComputePassEncoder

GPURenderBundleEncoder

GPUUncapturedErrorEvent

unstable

GPUValidationError

unstable

GPUBindGroupDescriptor

unstable

GPUBindGroupEntry

unstable

GPUBindGroupLayoutDescriptor

unstable

GPUBindGroupLayoutEntry

GPUBufferBindingLayout

unstable

GPUBufferDescriptor

unstable

GPUCanvasConfiguration

GPUCommandBufferDescriptor

unstable

GPUCommandEncoderDescriptor

unstable

GPUCompilationInfo

unstable

GPUCompilationMessage

unstable

GPUComputePassDescriptor

unstable

GPUComputePassTimestampWrites

unstable

GPUComputePipelineDescriptor

GPUObjectDescriptorBase

GPUPipelineDescriptorBase

unstable

GPUPipelineErrorInit

unstable

GPUPipelineLayoutDescriptor

unstable

GPUPrimitiveState

unstable

GPUProgrammablePassEncoder

unstable

GPUProgrammableStage

unstable

GPUQuerySetDescriptor

unstable

GPURenderBundleDescriptor

unstable

GPURenderBundleEncoderDescriptor

unstable

GPURenderEncoderBase

unstable

GPURenderPassColorAttachment

unstable

GPURenderPassDepthStencilAttachment

unstable

GPURenderPassDescriptor

unstable

GPURenderPassLayout

unstable

GPURenderPassTimestampWrites

unstable

GPURenderPipelineDescriptor

unstable

GPURequestAdapterOptions

unstable

GPUSamplerBindingLayout

unstable

GPUSamplerDescriptor

unstable

GPUShaderModuleDescriptor

unstable

GPUStencilFaceState

unstable

GPUStorageTextureBindingLayout

unstable

GPUTextureBindingLayout

unstable

GPUTextureDescriptor

unstable

GPUTextureViewDescriptor

unstable

GPUUncapturedErrorEventInit

unstable

GPUVertexAttribute

unstable

GPUVertexBufferLayout

GPUCompilationMessageType

GPUPipelineErrorReason

GPUSamplerBindingType

GPUStorageTextureAccess

GPUTextureViewDimension

HTTP Server

Deno.ServeHandlerInfo

Deno.ServeUnixHandlerInfo

Deno.ServeUnixInit

Deno.ServeUnixOptions

Deno.ServeHandler

Deno.Server

Deno.ServeUnixHandler

I/O

Intl

Intl.DateTimeFormatOptions

unstable

Intl.DateTimeFormatRangePart

Jupyter

Deno.jupyter.DisplayOptions

unstable

Deno.jupyter.Displayable

unstable

Deno.jupyter.MediaBundle

unstable

Deno.jupyter.VegaObject

unstable

Deno.jupyter.$display

unstable

Deno.jupyter.broadcast

Messaging

BroadcastChannelEventMap

Network

Deno.ConnectTlsOptions

Deno.ListenTlsOptions

Deno.MulticastV4Membership

unstable

Deno.MulticastV6Membership

Deno.NetworkInterfaceInfo

Deno.ResolveDnsOptions

Deno.TcpListenOptions

unstable

Deno.TlsCertifiedKeyConnectTls

Deno.TlsCertifiedKeyFromFile

Deno.TlsCertifiedKeyPem

Deno.TlsConn

Deno.TlsHandshakeInfo

Deno.UdpListenOptions

unstable

Deno.UnixAddr

Deno.UnixConn

Deno.UnixConnectOptions

Deno.UnixListenOptions

Deno.Addr

Deno.RecordType

Deno.TcpListener

Deno.TlsCertifiedKeyOptions

Deno.networkInterfaces

Performance

PerformanceMarkOptions

PerformanceMeasure

PerformanceMeasureOptions

PerformanceEntryList

performance

Permissions

Deno.Permissions

Deno.PermissionStatus

Deno.EnvPermissionDescriptor

Deno.FfiPermissionDescriptor

Deno.HrtimePermissionDescriptor

Deno.NetPermissionDescriptor

Deno.PermissionOptionsObject

Deno.PermissionStatusEventMap

Deno.ReadPermissionDescriptor

Deno.RunPermissionDescriptor

Deno.SysPermissionDescriptor

Deno.WritePermissionDescriptor

Deno.PermissionDescriptor

Deno.PermissionName

Deno.PermissionOptions

Platform

Float16ArrayConstructor

StructuredSerializeOptions

Runtime

Deno.SystemMemoryInfo

Deno.addSignalListener

Deno.removeSignalListener

Deno.resources

Deno.systemMemoryInfo

Storage

Streams

ByteLengthQueuingStrategy

QueuingStrategySizeCallback

ReadableByteStreamController

ReadableByteStreamControllerCallback

ReadableStream

ReadableStreamBYOBReadDoneResult

ReadableStreamBYOBReader

ReadableStreamBYOBReaderReadOptions

ReadableStreamBYOBReadValueResult

ReadableStreamBYOBRequest

ReadableStreamDefaultController

ReadableStreamDefaultControllerCallback

ReadableStreamDefaultReadDoneResult

ReadableStreamDefaultReader

ReadableStreamDefaultReadValueResult

ReadableStreamErrorCallback

Transformer

TransformStream

TransformStreamDefaultController

TransformStreamDefaultControllerCallback

TransformStreamDefaultControllerTransformCallback

WritableStreamDefaultController

WritableStreamDefaultControllerCloseCallback

WritableStreamDefaultControllerStartCallback

WritableStreamDefaultControllerWriteCallback

WritableStreamDefaultWriter

WritableStreamErrorCallback

ReadableStreamBYOBReadResult

ReadableStreamDefaultReadResult

Sub Process

Deno.UnstableRunOptions

Temporal

Temporal.PlainDateTime

unstable

Temporal.PlainMonthDay

unstable

Temporal.PlainTime

unstable

Temporal.PlainYearMonth

unstable

Temporal.TimeZone

unstable

Temporal.ZonedDateTime

unstable

Date

unstable

Temporal.CalendarProtocol

unstable

Temporal.DifferenceOptions

unstable

Temporal.DurationArithmeticOptions

unstable

Temporal.TimeZoneProtocol

unstable

Temporal.ArithmeticOptions

unstable

Temporal.AssignmentOptions

unstable

Temporal.CalendarLike

unstable

Temporal.CalendarTypeToStringOptions

unstable

Temporal.ComparisonResult

unstable

Temporal.DateTimeUnit

unstable

Temporal.DateUnit

unstable

Temporal.DurationLike

unstable

Temporal.DurationOptions

unstable

Temporal.DurationRoundTo

unstable

Temporal.DurationTotalOf

unstable

Temporal.InstantToStringOptions

unstable

Temporal.LargestUnit

unstable

Temporal.MonthCodeOrMonthAndYear

unstable

Temporal.MonthOrMonthCode

unstable

Temporal.OffsetDisambiguationOptions

unstable

Temporal.PlainDateISOFields

unstable

Temporal.PlainDateLike

unstable

Temporal.PlainDateTimeISOFields

unstable

Temporal.PlainDateTimeLike

unstable

Temporal.PlainMonthDayLike

unstable

Temporal.PlainTimeISOFields

unstable

Temporal.PlainTimeLike

unstable

Temporal.PlainYearMonthLike

unstable

Temporal.PluralUnit

unstable

Temporal.RoundingMode

unstable

Temporal.RoundTo

unstable

Temporal.ShowCalendarOption

unstable

Temporal.SmallestUnit

unstable

Temporal.TimeUnit

unstable

Temporal.TimeZoneLike

unstable

Temporal.ToInstantOptions

unstable

Temporal.ToStringPrecisionOptions

unstable

Temporal.TotalUnit

unstable

Temporal.YearOrEraAndEraYear

unstable

Temporal.ZonedDateTimeAssignmentOptions

unstable

Temporal.ZonedDateTimeISOFields

unstable

Temporal.ZonedDateTimeLike

unstable

Temporal.ZonedDateTimeToStringOptions

Testing

Deno.TestStepDefinition

Deno.test

Deno.bench

URL

URLPattern

URLPatternComponentResult

WASM

WebAssembly.CompileError

WebAssembly.Global

WebAssembly.Instance

WebAssembly.LinkError

WebAssembly.Memory

WebAssembly.Module

WebAssembly.RuntimeError

WebAssembly.Table

WebAssembly.GlobalDescriptor

WebAssembly.MemoryDescriptor

WebAssembly.ModuleExportDescriptor

WebAssembly.ModuleImportDescriptor

WebAssembly.TableDescriptor

WebAssembly.WebAssemblyInstantiatedSource

WebAssembly.Exports

WebAssembly.ExportValue

WebAssembly.ImportExportKind

WebAssembly.Imports

WebAssembly.ImportValue

WebAssembly.ModuleImports

WebAssembly.TableKind

WebAssembly.ValueType

WebAssembly.compile

WebAssembly.compileStreaming

WebAssembly.instantiate

WebAssembly.instantiateStreaming

WebAssembly.validate

Web Sockets

Deno.UpgradeWebSocketOptions

Deno.WebSocketUpgrade

Deno.upgradeWebSocket

WebSockets

WebSocketStreamOptions

unstable

BinaryType

Workers

AbstractWorkerEventMap

function Deno.flock

Unstable

flock(rid: number, exclusive?: boolean): Promise<void>

Acquire an advisory file-system lock for the provided file.

flock(rid: number, exclusive?: boolean): Promise<void>

Acquire an advisory file-system lock for the provided file.

Parameters

rid: number

optional

exclusive: boolean

Returns

Promise<void>

Acquire an advisory file-system lock for the provided file.

Parameters

rid: number

optional

exclusive: boolean

Returns

Promise<void>