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nx::kit::OutputRedirector Class Reference

#include <output_redirector.h>

Inheritance diagram for nx::kit::OutputRedirector:
OutputRedirectorAdapter

Public Member Functions

 OutputRedirector (const OutputRedirector &)=delete
 
void operator= (const OutputRedirector &)=delete
 

Static Public Member Functions

static const OutputRedirectorgetInstance ()
 
static void ensureOutputRedirection ()
 

Static Protected Member Functions

static void redirectStdoutAndStderrIfNeeded (const char *overridingLogFilesDir=nullptr)
 

Detailed Description

The mechanism allows to perform output (stdout, stderr) redirection to files.

To activate redirection, the user must create special files in the directory nx::kit::IniConfig::iniFilesDir(), named as follows: <executable-name-without-extension>_stdout.log and/or <executable-name-without-extension>_stderr.log

If such a file exists, the respective stream will be appended to the file contents.

Redirection is performed during static initialization, thus, to ensure that it occurs before any other output, this library should be the first in the list of linked libraries of the executable. Note that in Windows due to some MSVC C++ Runtime issues, if any output occurs before the redirection, the redirection may not work (the output disappears at all).

If needed, this mechanism can be disabled defining a macro at compiling output_redirector.cpp: -DNX_OUTPUT_REDIRECTOR_DISABLED.

Member Function Documentation

◆ ensureOutputRedirection()

void nx::kit::OutputRedirector::ensureOutputRedirection ( )
static

Call from anywhere in the code of the executable that links with this library.

This is needed to guarantee that the static initializer in this library (that performs the redirection) is called, because if no symbols from this library are used in the executable, the linker can optimize away any static initialization in this library.


The documentation for this class was generated from the following files: