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PThread_Mutex Class Reference

#include <Mutex.hpp>

Inheritance diagram for PThread_Mutex::

List of all members.

Public Methods
	PThread_Mutex ()
virtual	~PThread_Mutex ()
void	lock ()
void	unlock ()
__inline void	tryLock ()
__inline int	getPriorityCeiling ()
__inline int	setPriorityCeiling (int new_ceiling)
__inline int	getType ()
__inline int	getProtocol ()
Private Methods
__inline	PThread_Mutex (const PThread_Mutex &src)
__inline const PThread_Mutex &	operator= (const PThread_Mutex &src)
Private Attributes
int	mutex_type
int	protocol
int	prioceiling
int	state
pid_t	owner
pthread_mutexattr_t	attr
pthread_mutex_t	mutex

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Constructor & Destructor Documentation

PThread_Mutex::PThread_Mutex (    )

Definition at line 12 of file Mutex.cpp. { // Fill structure with 0 memset( &attr, 0, sizeof( pthread_mutexattr_t ) ); memset( &mutex, 0, sizeof( pthread_mutex_t ) ); int err = pthread_mutexattr_init( &attr ); MC_OnError( err, Error, "An unknown error happened while initializing a mutex attribute." ) err = pthread_mutex_init( &mutex, &attr ); MC_OnError( err, Error, "An error happened while initializing a mutex." ) state = 0; }

PThread_Mutex::~PThread_Mutex (    )  [virtual]

Definition at line 28 of file Mutex.cpp. { while( state > 0 ) { printf("DELETE" ); fflush( stdout ); exit( 1 ); } int err = pthread_mutex_destroy( &mutex ); MC_OnError( err, Error, "An error happened while deleting a mutex." ) // Make sure the mutex is Unlock... // WARNING: Make sure that Mutex destroy // ======== don't destroy attribute, // so that there is no double destroy on attr. err = pthread_mutexattr_destroy( &attr ); MC_OnError( err, Error, "An error happened while deleting a mutex attribute." ) }

PThread_Mutex::PThread_Mutex (  const PThread_Mutex &    src )  [inline, private]

Definition at line 9 of file Mutex.inl. { memcpy( &attr, &src.attr, sizeof( pthread_mutexattr_t ) ); memcpy( &mutex, &src.mutex, sizeof( pthread_mutex_t ) ); state = 0; }

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Member Function Documentation

int PThread_Mutex::getPriorityCeiling (    )  [inline]

Definition at line 34 of file Mutex.inl. { int ceiling = 0; int err = pthread_mutex_getprioceiling( &mutex, &ceiling ); MC_OnError( err, Error, "An error happened while retrieving the priority ceiling of a mutex." ) return ceiling; }

int PThread_Mutex::getProtocol (    )  [inline]

Definition at line 66 of file Mutex.inl. { int err = pthread_mutexattr_getprotocol( &attr, &protocol ); MC_OnError( err, Error, "while getting the mutex attribute protocol.") return protocol; }

int PThread_Mutex::getType (    )  [inline]

Definition at line 55 of file Mutex.inl. { int mtype = 0; int err = pthread_mutexattr_gettype( &attr, &mtype ); MC_OnError( err, Error, "An error happened while getting the mutex type." ) return mtype; }

void PThread_Mutex::lock (    )

Reimplemented in RecursiveMutex. Definition at line 47 of file Mutex.cpp. Referenced by Semaphore::P(), Semaphore::V(), Lock::get(), Semaphore::get(), RecursiveMutex::lock(), RWLock::read(), RWLock::releaseRead(), RWLock::releaseWrite(), Fred::run(), and RWLock::write(). { // if ( state == 1 ) return; if ( pthread_self() != owner ) { sched_yield(); } state = 1; register int err = pthread_mutex_lock( &mutex ); MC_OnError( err, Error, "An error happened while locking a mutex." ) owner = pthread_self(); }

const PThread_Mutex & PThread_Mutex::operator= (  const PThread_Mutex &    src )  [inline, private]

Definition at line 17 of file Mutex.inl. { memcpy( &attr, &src.attr, sizeof( pthread_mutexattr_t ) ); memcpy( &mutex, &src.mutex, sizeof( pthread_mutex_t ) ); state = 0; return *this; }

int PThread_Mutex::setPriorityCeiling (  int    new_ceiling )  [inline]

Definition at line 44 of file Mutex.inl. { int old_ceiling = 0; int err = pthread_mutex_setprioceiling( &mutex, new_ceiling, &old_ceiling ); MC_OnError( err, Error, "An error happened while setting the priority ceiling of a mutex." ) return old_ceiling; }

void PThread_Mutex::tryLock (    )  [inline]

Definition at line 27 of file Mutex.inl. { int err = pthread_mutex_trylock( &mutex ); MC_OnError( err, Error, "An error happened while trying to lock a mutex." ) }

void PThread_Mutex::unlock (    )

Reimplemented in RecursiveMutex. Definition at line 63 of file Mutex.cpp. Referenced by Semaphore::P(), Semaphore::V(), Semaphore::get(), if(), RWLock::read(), Lock::release(), RWLock::releaseRead(), RWLock::releaseWrite(), Fred::run(), and RWLock::write(). { // if ( state == 0 ) return; if ( pthread_self() != owner ) { sched_yield(); return; } register int err = pthread_mutex_unlock( &mutex ); if ( err == EPERM ) { printf( "Unlock. Permission denied. Not owner." ); } else { MC_OnError( err, Error, "An error happened while unlocking a mutex." ) } state = 0; }

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Member Data Documentation

pthread_mutexattr_t PThread_Mutex::attr [private]

Definition at line 64 of file Mutex.hpp. Referenced by PThread_Mutex(), and operator=().

pthread_mutex_t PThread_Mutex::mutex [private]

Definition at line 65 of file Mutex.hpp. Referenced by PThread_Mutex(), and operator=().

int PThread_Mutex::mutex_type [private]

Definition at line 58 of file Mutex.hpp.

pid_t PThread_Mutex::owner [private]

Reimplemented in RecursiveMutex. Definition at line 62 of file Mutex.hpp.

int PThread_Mutex::prioceiling [private]

Definition at line 60 of file Mutex.hpp.

int PThread_Mutex::protocol [private]

Definition at line 59 of file Mutex.hpp.

int PThread_Mutex::state [private]

Definition at line 61 of file Mutex.hpp.

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

• C:/temp/src/j2k/Deprecated/old_18mar_diff/nto/Mutex.hpp
• C:/temp/src/j2k/Deprecated/old_18mar_diff/nto/Mutex.cpp
• C:/temp/src/j2k/Deprecated/old_18mar_diff/nto/Mutex.inl

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