SC::AsyncFileClose Struct Reference

Starts a file close operation, closing the OS file descriptor. More...

#include <Async.h>

Inheritance diagram for SC::AsyncFileClose:

Classes
struct	CompletionData
	Completion data for AsyncFileClose. More...

Public Types
using	Result = AsyncResultOf<AsyncFileClose, CompletionData>
	Callback result for AsyncFileClose.
Public Types inherited from SC::AsyncRequest
enum class	Type : uint8_t {   LoopTimeout ,   LoopWakeUp ,   LoopWork ,   ProcessExit ,   SocketAccept ,   SocketConnect ,   SocketSend ,   SocketReceive ,   SocketClose ,   FileRead ,   FileWrite ,   FileClose ,   FilePoll }
	Type of async request. More...

Public Member Functions
SC::Result	start (AsyncEventLoop &eventLoop, FileDescriptor::Handle fileDescriptor)
	Sets async request members and calls AsyncEventLoop::start.
Public Member Functions inherited from SC::AsyncRequest
void	setDebugName (const char *newDebugName)
void	executeOn (AsyncSequence &sequence)
	Adds the request to be executed on a specific AsyncSequence.
Result	executeOn (AsyncTaskSequence &task, ThreadPool &pool)
	Adds the request to be executed on a specific AsyncTaskSequence.
void	disableThreadPool ()
	Disables the thread-pool usage for this request.
	AsyncRequest (Type type)
	Constructs a free async request of given type.
Result	stop (AsyncEventLoop &eventLoop, Function< void(AsyncResult &)> *afterStopped=nullptr)
	Ask to stop current async operation.
bool	isFree () const
	Returns true if this request is free.
bool	isCancelling () const
	Returns true if this request is being cancelled.
bool	isActive () const
	Returns true if this request is active or being reactivated.
Type	getType () const
	Returns request type.
Result	start (AsyncEventLoop &eventLoop)
	Shortcut for AsyncEventLoop::start.
void	setUserFlags (uint16_t externalFlags)
	Sets user flags, holding some meaningful data for the caller.
uint16_t	getUserFlags () const
	Gets user flags, holding some meaningful data for the caller.
Function< void(AsyncResult &)> *	getCloseCallback ()
	Returns currently set close callback (if any) passed to AsyncRequest::stop.
const Function< void(AsyncResult &)> *	getCloseCallback () const

Public Attributes
Function< void(Result &)>	callback
	Callback called after fully closing the file descriptor.
Public Attributes inherited from SC::AsyncRequest
AsyncRequest *	next = nullptr
AsyncRequest *	prev = nullptr

Friends
struct	AsyncEventLoop

Additional Inherited Members
Protected Member Functions inherited from SC::AsyncRequest
Result	checkState ()
void	queueSubmission (AsyncEventLoop &eventLoop)
AsyncTaskSequence *	getTask ()
Protected Attributes inherited from SC::AsyncRequest
AsyncSequence *	sequence = nullptr

Detailed Description

Starts a file close operation, closing the OS file descriptor.

Callback will be called when the file is actually closed.
File library can be used to open the file and obtain a blocking or non-blocking file descriptor handle.

// Assuming an already created (and running) AsyncEventLoop named eventLoop
// ...
 
// Open a file and associated it with event loop
FileDescriptor fd;
File::OpenOptions options;
options.blocking = false;
SC_TRY(File(fd).open("MyFile.txt", File::WriteCreateTruncate, options));
SC_TRY(eventLoop.associateExternallyCreatedFileDescriptor(fd));
 
// Create the file close request
FileDescriptor::Handle handle;
SC_TRY(fd.get(handle, Result::Error("handle")));
AsyncFileClose asyncFileClose;
asyncFileClose.callback = [&](AsyncFileClose::Result& result)
{
    if(result.isValid())
    {
        console.printLine("File was closed successfully");
    }
};
SC_TRY(asyncFileClose.start(eventLoop, handle));

Member Typedef Documentation

Result

using SC::AsyncFileClose::Result = AsyncResultOf<AsyncFileClose, CompletionData>

Callback result for AsyncFileClose.

Member Function Documentation

start()

SC::Result SC::AsyncFileClose::start	(	AsyncEventLoop &	eventLoop,
		FileDescriptor::Handle	fileDescriptor )

Sets async request members and calls AsyncEventLoop::start.

Member Data Documentation

callback

Function<void(Result&)> SC::AsyncFileClose::callback

Callback called after fully closing the file descriptor.

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The documentation for this struct was generated from the following file:

• Async.h