Threads::DummyThreadCondition Class Reference

#include <deal.II/base/thread_management.h>

Public Member Functions
void	signal () const
void	broadcast () const
void	wait (DummyThreadMutex &) const

Detailed Description

This class is used in single threaded mode instead of a class implementing real condition variable semantics. It allows to write programs such that they start new threads and/or lock objects in multithreading mode, and use dummy thread management and synchronization classes instead when running in single-thread mode. Specifically, the new_thread() functions only call the function but wait for it to return instead of running in on another thread, and the mutexes do nothing really. The only reason to provide such a function is that the program can be compiled both in MT and non-MT mode without difference.

In this particular case, just as with mutexes, the functions do nothing, and by this provide the same semantics of condition variables as in multi-threaded mode.

Author

Wolfgang Bangerth, 2003

Definition at line 151 of file thread_management.h.

Member Function Documentation

void Threads::DummyThreadCondition::signal ( ) const

inline

Signal to a single listener that a condition has been met, i.e. that some data will now be available. Since in single threaded mode, this function of course does nothing.

Definition at line 160 of file thread_management.h.

void Threads::DummyThreadCondition::broadcast ( ) const

inline

Signal to multiple listener that a condition has been met, i.e. that some data will now be available. Since in single threaded mode, this function of course does nothing.

Definition at line 169 of file thread_management.h.

void Threads::DummyThreadCondition::wait ( DummyThreadMutex &  ) const

inline

Wait for the condition to be signalled. Signal variables need to be guarded by a mutex which needs to be given to this function as an argument, see the man page of posix_cond_wait for a description of the mechanisms. Since in single threaded mode, this function of course does nothing, but returns immediately.

Definition at line 180 of file thread_management.h.

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

• deal.II/base/thread_management.h