Qore::StderrOutputStream Class Reference

This class implements the OutputStream interface for writing bytes to the standard output stream stderr. More...

#include <QC_StderrOutputStream.dox.h>

Inheritance diagram for Qore::StderrOutputStream:

Public Member Methods
nothing	close ()
	Does nothing since stderr cannot be closed.
	constructor ()
	Creates the StderrOutputStream.
nothing	write (binary data)
	Writes bytes to the output stream.
Public Member Methods inherited from Qore::OutputStream
abstract nothing	close ()
	Flushes any buffered (unwritten) bytes, closes the output stream and releases all resources.
	constructor ()
	Constructor.
abstract nothing	write (binary data)
	Writes bytes to the output stream.
Public Member Methods inherited from Qore::StreamBase
	constructor ()
	Throws an exception if called directly; this class can only be instantiated by builtin subclasses.
int	getThreadId ()
	Get the currently assigned thread id or -1 if not assigned to any thread.
nothing	reassignThread ()
	Reassigns current thread as thread used for stream manipulation.
nothing	unassignThread ()
	Unassigns current thread as thread used for stream manipulation.

Detailed Description

This class implements the OutputStream interface for writing bytes to the standard output stream stderr.

Restrictions:

Qore::PO_NO_TERMINAL_IO

Example: StderrOutputStream basic usage

StderrOutputStream seos();
seos.write(<01>);
seos.write(<0203>);
# three bytes have been written to stderr: 01 02 03

Note

stream classes are not designed to be accessed from multiple threads; they have been implemented without locking for fast and efficient use when used from a single thread. For methods that would be unsafe to use in another thread, any use of such methods in threads other than the thread where the constructor was called will cause a STREAM-THREAD-ERROR to be thrown, unless the stream is handed off to another thread using the StreamBase::unassignThread() method in the thread that currently owns the stream, and the StreamBase::reassignThread() method in the new thread.

See also

StreamWriter for a class that can be used to write various kinds of data to an OutputStream

Since

Qore 0.8.13

Member Function Documentation

close()

nothing Qore::StderrOutputStream::close

(

)

Does nothing since stderr cannot be closed.

Exceptions

STREAM-THREAD-ERROR

this exception is thrown if this method is called from any thread other than the thread that created the object

write()

nothing Qore::StderrOutputStream::write

(

binary

data

)

Writes bytes to the output stream.

Parameters

data	the data to write

Example:

StderrOutputStream seos();
seos.write(<01>);
seos.write(<0203>);
# three bytes have been written to stderr: 01 02 03

Exceptions

STREAM-THREAD-ERROR

this exception is thrown if this method is called from any thread other than the thread that created the object