PosixCondition Class Reference

Implementation of a condition variable. More...

#include <PosixCondition.hpp>

Public Member Functions
	PosixCondition ()
	Constructor. Initialize the condition variable.
	~PosixCondition ()
	Destructor. Destroys the condition variable.
int	wait (PosixMutex *m)
	Blocks the calling thread on the condition variable.
int	timedWait (PosixMutex *m, const Time &abstime)
	Blocks the calling thread on the condition variable.
int	signal ()
	Unblocks at least one of the blocked threads.
int	signalAll ()
	Unblocks all blocked threads.

Private Member Functions
	PosixCondition (const PosixMutex &)
PosixCondition &	operator= (const PosixMutex &)

Private Attributes
pthread_cond_t	cond_

Detailed Description

Implementation of a condition variable.

The class is non copyable and makes use of the pthread library.

Definition at line 38 of file PosixCondition.hpp.

Constructor & Destructor Documentation

PosixCondition ( const PosixMutex &  )

private

PosixCondition

(

)

Constructor. Initialize the condition variable.

Exceptions

runtime_error

if the initialization of the condition variable fails.

Definition at line 35 of file PosixCondition.cpp.

{
        if (pthread_cond_init(&cond_, NULL) != 0)
                throw std::runtime_error(std::string("Error: ") + strerror(errno));
}

~PosixCondition

(

)

Destructor. Destroys the condition variable.

Definition at line 44 of file PosixCondition.cpp.

{
        VERIFY_ASSERTION(!pthread_cond_destroy(&cond_));
}

Member Function Documentation

PosixCondition& operator= ( const PosixMutex &  )

private

int signal ( )

inline

Unblocks at least one of the blocked threads.

Returns

0 in case of success

Definition at line 82 of file PosixCondition.hpp.

                     {
                return pthread_cond_signal(&cond_);
        }

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int signalAll ( )

inline

Unblocks all blocked threads.

Returns

0 in case of success

Definition at line 91 of file PosixCondition.hpp.

                        {
                return pthread_cond_broadcast(&cond_);
        }

int timedWait ( PosixMutex *  m, const Time &  abstime  )

inline

Blocks the calling thread on the condition variable.

These functions atomically release mutex and cause the calling thread to block on the condition variable.

Parameters

m	Mutex released when blocking and acquired when unblocking.
abstime	Absolute time for timeout

Returns

0 in case of success, ETIMEDOUT in case of timeout

Definition at line 70 of file PosixCondition.hpp.

                                                          {
                timespec ts;
                ts.tv_sec = abstime.getSeconds();
                ts.tv_nsec = abstime.getNSeconds();
                return pthread_cond_timedwait(&cond_, &(m->mutex_), &ts);
        }

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int wait ( PosixMutex *  m )

inline

Blocks the calling thread on the condition variable.

These functions atomically release mutex and cause the calling thread to block on the condition variable.

Parameters

m	Mutex released when blocking and acquired when unblocking.

Returns

0 in case of success

Definition at line 57 of file PosixCondition.hpp.

                                {
                return pthread_cond_wait(&cond_, &(m->mutex_));
        }

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Member Data Documentation

pthread_cond_t cond_

private

Definition at line 43 of file PosixCondition.hpp.

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

• /home/cloud/work/onposix-code/include/PosixCondition.hpp
• /home/cloud/work/onposix-code/src/PosixCondition.cpp