tpy::GilProtectedPyLogger Class Reference

Logger type that relays to (wraps around) a PyLogger while protecting the call with GIL acquisition. More...

#include <py/cxx/tomographerpy/pygil.h>

Inheritance diagram for tpy::GilProtectedPyLogger:

Collaboration diagram for tpy::GilProtectedPyLogger:

Public Member Functions
	GilProtectedPyLogger (PyLogger &logger_, bool require_gil_acquisition_=true)
	Constructor. More...
PyLogger &	getLogger () const
	The PyLogger which we relay messages to.
bool	getRequireGilAcquisition () const
	Whether or not we are set to acquire the GIL for emitting messages at this point.
void	requireGilAcquisition (bool value)
	Instruct to acquire (true) or not (false) the GIL when emitting messages.
void	emitLog (int level, const char *origin, const std::string &msg)
	The callback function for the logger, you shouldn't call this directly.
Public Member Functions inherited from Tomographer::Logger::LoggerBase< GilProtectedPyLogger >
	LoggerBase (int level_=INFO)
	Construct the base logger object. More...
bool	enabledFor (int level_) const
	Check whether messages at the given log level are enabled. More...
int	level () const
	Get the log level set for this logger. More...
void	error (const char *origin, const char *fmt,...)
	emit an error message More...
void	error (const char *origin, std::string msg)
	emit an error message More...
void	error (const char *origin, Fn &&f)
	emit an error message More...
void	error (Args &&...)
	Special-case implementation for messages which are known to be discarded at compile time.
void	warning (const char *origin, const char *fmt,...)
	emit a warning message More...
void	warning (const char *origin, std::string msg)
	emit a warning message More...
void	warning (const char *origin, Fn &&f)
	emit a warning message More...
void	warning (Args &&...)
	Special-case implementation for messages which are known to be discarded at compile time.
void	info (const char *origin, const char *fmt,...)
	emit an information/notice message More...
void	info (const char *origin, std::string msg)
	emit an information/notice message More...
void	info (const char *origin, Fn &&f)
	emit an information/notice message More...
void	info (Args &&...)
	Special-case implementation for messages which are known to be discarded at compile time.
void	debug (const char *origin, const char *fmt,...)
	emit an debug message More...
void	debug (const char *origin, std::string msg)
	emit an debug message More...
void	debug (const char *origin, Fn &&f)
	emit an debug message More...
void	debug (Args &&...)
	Special-case implementation for messages which are known to be discarded at compile time.
void	longdebug (const char *origin, const char *fmt,...)
	emit a very verbose debugging message More...
void	longdebug (const char *origin, std::string msg)
	emit a very verbose debugging message More...
void	longdebug (const char *origin, Fn &&f)
	emit a very verbose debugging message More...
void	longdebug (Args &&...)
	Special-case implementation for messages which are known to be discarded at compile time.
void	log (int level, const char *origin, const char *fmt,...)
	emit a log message at the given log level. More...
void	log (int level, const char *origin, std::string msg)
	emit a log message at the given log level. More...
void	log (int level, const char *origin, Fn &&f)
	emit a log message at the given log level. More...
void	log (const char *origin, const char *fmt,...)
	emit a log message at the given log level. More...
void	log (const char *origin, const char *fmt, va_list ap)
	emit a log message at the given log level. More...
void	log (const char *origin, std::string msg)
	emit a log message at the given log level. More...
void	log (const char *origin, Fn f)
	emit a log message at the given log level. More...
void	log (Args &&...)
	Special-case implementation for messages which are known to be discarded at compile time.

Additional Inherited Members
Public Types inherited from Tomographer::Logger::LoggerBase< GilProtectedPyLogger >
enum
	Shortcuts to properties defined in the traits class.
Static Public Member Functions inherited from Tomographer::Logger::LoggerBase< GilProtectedPyLogger >
static bool	staticallyEnabledFor (int level)
	Check whether the logger is statically disabled for some levels. More...
static constexpr bool	staticallyEnabledFor ()
	Static version of staticallyEnabledFor() More...
Protected Member Functions inherited from Tomographer::Logger::LoggerBase< GilProtectedPyLogger >
int	getLevel () const
int	getLevel () const
GilProtectedPyLogger *	derived ()
const GilProtectedPyLogger *	derived () const
void	setLogLevel (int level)
	Store a new run-time log level. More...

Detailed Description

Logger type that relays to (wraps around) a PyLogger while protecting the call with GIL acquisition.

You should use this logger type whenever you need to provide a logger to Tomographer C++ classes which might be emitting messages while the GIL is not held.

This class behaves as a usual logger, i.e. you can call debug(), info(), warning(), etc.

Any calls to emitLog() will relay to the specified PyLogger instance after ensuring the GIL is held. GIL acquisition may be disabled by calling requireGilAcquisition(false) (or by passing false as second argument to the constructor), which may be useful in case you need to create the instance outside of a GIL-release block:

tpy::GilProtectedPyLogger gil_logger(logger, false);

// Messages emitted here should not attempt to acquire GIL as we haven't
// released it yet
Tomographer::MultiProc::CxxThreads::TaskDispatcher<....,GilProtectedPyLogger>
  tasks(..., gil_logger, ...);

{
  py::gil_scoped_release gilrelease;
  gil_logger->requireGilAcquisition(true);

  tasks.run(); // emitted messages will acquire GIL
}
// Here we hold the GIL again
gil_logger->requireGilAcquisition(false);

// now, extract results from the tasks
py::dict results = ....  extract from `tasks` ...

Definition at line 105 of file pygil.h.

Constructor & Destructor Documentation

GilProtectedPyLogger()

tpy::GilProtectedPyLogger::GilProtectedPyLogger ( PyLogger &  logger_, bool  require_gil_acquisition_ = true  )

inline

Constructor.

The argument logger_ is the PyLogger instance to wrap.

If require_gil_acquisition_ is False

Definition at line 115 of file pygil.h.

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

• py/cxx/tomographerpy/pygil.h (v5.2)