read(fileRegion:allocator:)

Read a FileRegion in NonBlockingFileIO’s private thread pool.

iOS: 13+
macOS: 10.15+
tvOS: 13+
watchOS: 6+

func read(fileRegion: FileRegion, allocator: ByteBufferAllocator) async throws -> ByteBuffer

Mangled symbol

s8NIOPosix17NonBlockingFileIOV4read10fileRegion9allocator7NIOCore10ByteBufferVAG0dH0V_AG0kL9AllocatorVtYaKFWhat are these?

FNV24: [6780U]

Parameters

fileRegion: The file region to read.
allocator: A ByteBufferAllocator used to allocate space for the returned ByteBuffer.

The returned ByteBuffer will not have less than the minimum of fileRegion.readableBytes and UInt32.max unless we hit end-of-file in which case the ByteBuffer will contain the bytes available to read.

This method will not use the file descriptor’s seek pointer which means there is no danger of reading from the same FileRegion in multiple threads.

Other members in extension

Types

enum Error
NonBlockingFileIO errors.

Type members

init(threadPool: NIOThreadPool)
Initialize a NonBlockingFileIO which uses the NIOThreadPool.
static let defaultChunkSize: Int
The default and recommended chunk size.
static let defaultThreadPoolSize: Int
The default and recommended size for NonBlockingFileIO’s thread pool.

Instance members

func changeFileSize(fileHandle: NIOFileHandle, size: Int64) async throws
Changes the file size of fileHandle to size.
func changeFileSize(fileHandle: NIOFileHandle, size: Int64, eventLoop: EventLoop) -> EventLoopFuture<()>
Changes the file size of fileHandle to size.
func createDirectory(path: String, withIntermediateDirectories: Bool, mode: NIOPOSIXFileMode) async throws
Creates directory at path on a private thread pool.
func createDirectory(path: String, withIntermediateDirectories: Bool, mode: NIOPOSIXFileMode, eventLoop: EventLoop) -> EventLoopFuture<Void>
Creates directory at path on a private thread pool which is separate from any EventLoop thread.
func listDirectory(path: String) async throws -> [NIODirectoryEntry]
List contents of the directory at path on a private thread pool.
func listDirectory(path: String, eventLoop: EventLoop) -> EventLoopFuture<[NIODirectoryEntry]>
List contents of the directory at path on a private thread pool which is separate from any EventLoop thread.
func lstat(path: String) async throws -> stat
Returns information about a file at path on a private thread pool.
func lstat(path: String, eventLoop: EventLoop) -> EventLoopFuture<stat>
Returns information about a file at path on a private thread pool which is separate from any EventLoop thread.
func openFile(path: String, eventLoop: EventLoop) -> EventLoopFuture<(NIOFileHandle, FileRegion)>
Open the file at path for reading on a private thread pool which is separate from any EventLoop thread.
func openFile(path: String, mode: NIOFileHandle.Mode, flags: NIOFileHandle.Flags, eventLoop: EventLoop) -> EventLoopFuture<NIOFileHandle>
Open the file at path with specified access mode and POSIX flags on a private thread pool which is separate from any EventLoop thread.
func read(fileHandle: NIOFileHandle, byteCount: Int, allocator: ByteBufferAllocator) async throws -> ByteBuffer
Read byteCount bytes from fileHandle in NonBlockingFileIO’s private thread pool.
func read(fileHandle: NIOFileHandle, byteCount: Int, allocator: ByteBufferAllocator, eventLoop: EventLoop) -> EventLoopFuture<ByteBuffer>
Read byteCount bytes from fileHandle in NonBlockingFileIO’s private thread pool which is separate from any EventLoop thread.
func read(fileHandle: NIOFileHandle, fromOffset: Int64, byteCount: Int, allocator: ByteBufferAllocator) async throws -> ByteBuffer
Read byteCount bytes starting at fileOffset from fileHandle in NonBlockingFileIO’s private thread pool .
func read(fileHandle: NIOFileHandle, fromOffset: Int64, byteCount: Int, allocator: ByteBufferAllocator, eventLoop: EventLoop) -> EventLoopFuture<ByteBuffer>
Read byteCount bytes starting at fileOffset from fileHandle in NonBlockingFileIO’s private thread pool which is separate from any EventLoop thread.
func read(fileRegion: FileRegion, allocator: ByteBufferAllocator, eventLoop: EventLoop) -> EventLoopFuture<ByteBuffer>
Read a FileRegion in NonBlockingFileIO’s private thread pool which is separate from any EventLoop thread.
func readChunked(fileHandle: NIOFileHandle, byteCount: Int, chunkSize: Int, allocator: ByteBufferAllocator, eventLoop: EventLoop, chunkHandler: @escaping (ByteBuffer) -> EventLoopFuture<Void>) -> EventLoopFuture<Void>
Read byteCount bytes in chunks of chunkSize bytes from fileHandle in NonBlockingFileIO’s private thread pool which is separate from any EventLoop thread.
func readChunked(fileHandle: NIOFileHandle, fromOffset: Int64, byteCount: Int, chunkSize: Int, allocator: ByteBufferAllocator, eventLoop: EventLoop, chunkHandler: @escaping (ByteBuffer) -> EventLoopFuture<Void>) -> EventLoopFuture<Void>
Read byteCount bytes from offset fileOffset in chunks of chunkSize bytes from fileHandle in NonBlockingFileIO’s private thread pool which is separate from any EventLoop thread.
func readChunked(fileRegion: FileRegion, chunkSize: Int, allocator: ByteBufferAllocator, eventLoop: EventLoop, chunkHandler: @escaping (ByteBuffer) -> EventLoopFuture<Void>) -> EventLoopFuture<Void>
Read a FileRegion in chunks of chunkSize bytes on NonBlockingFileIO’s private thread pool which is separate from any EventLoop thread.
func readFileSize(fileHandle: NIOFileHandle) async throws -> Int64
Returns the length of the file associated with fileHandle.
func readFileSize(fileHandle: NIOFileHandle, eventLoop: EventLoop) -> EventLoopFuture<Int64>
Returns the length of the file in bytes associated with fileHandle.
func readlink(path: String) async throws -> String
Returns target of the symbolic link at path on a private thread pool.
func readlink(path: String, eventLoop: EventLoop) -> EventLoopFuture<String>
Returns target of the symbolic link at path on a private thread pool which is separate from any EventLoop thread.
func remove(path: String) async throws
Removes the file at path on a private thread pool.
func remove(path: String, eventLoop: EventLoop) -> EventLoopFuture<Void>
Removes the file at path on a private thread pool which is separate from any EventLoop thread.
func rename(path: String, newName: String) async throws
Renames the file at path to newName on a private thread pool.
func rename(path: String, newName: String, eventLoop: EventLoop) -> EventLoopFuture<Void>
Renames the file at path to newName on a private thread pool which is separate from any EventLoop thread.
func symlink(path: String, to: String) async throws
Creates a symbolic link to a destination file at path on a private thread pool.
func symlink(path: String, to: String, eventLoop: EventLoop) -> EventLoopFuture<Void>
Creates a symbolic link to a destination file at path on a private thread pool which is separate from any EventLoop thread.
func unlink(path: String) async throws
Removes symbolic link at path on a private thread pool which is separate from any EventLoop thread.
func unlink(path: String, eventLoop: EventLoop) -> EventLoopFuture<Void>
Removes symbolic link at path on a private thread pool which is separate from any EventLoop thread.
func withFileHandle<Result>(path: String, mode: NIOFileHandle.Mode, flags: NIOFileHandle.Flags, (NIOFileHandle) async throws -> Result) async throws -> Result
Open file at path on a private thread pool, run an operation given the file handle and then close the file handle.
func withFileRegion<Result>(path: String, (_ fileRegion: FileRegion) async throws -> Result) async throws -> Result
Open file at path and query its size on a private thread pool, run an operation given the resulting file region and then close the file handle.
func write(fileHandle: NIOFileHandle, buffer: ByteBuffer) async throws
Write buffer to fileHandle in NonBlockingFileIO’s private thread pool.
func write(fileHandle: NIOFileHandle, buffer: ByteBuffer, eventLoop: EventLoop) -> EventLoopFuture<()>
Write buffer to fileHandle in NonBlockingFileIO’s private thread pool which is separate from any EventLoop thread.
func write(fileHandle: NIOFileHandle, toOffset: Int64, buffer: ByteBuffer) async throws
Write buffer starting from toOffset to fileHandle in NonBlockingFileIO’s private thread pool.
func write(fileHandle: NIOFileHandle, toOffset: Int64, buffer: ByteBuffer, eventLoop: EventLoop) -> EventLoopFuture<()>
Write buffer starting from toOffset to fileHandle in NonBlockingFileIO’s private thread pool which is separate from any EventLoop thread.