NonblockingRWLock Class Reference

#include <rwlock.h>

List of all members.

Public Member Functions
	NonblockingRWLock ()
virtual	~NonblockingRWLock ()
void	enter_read ()
void	leave_read ()
void	enter_write ()
void	leave_write ()
Static Public Member Functions
static const char *	name ()
Private Attributes
volatile int	readers
volatile int	writers
SystemLock	l

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Detailed Description

Definition at line 25 of file rwlock.h.

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Constructor & Destructor Documentation

NonblockingRWLock::NonblockingRWLock

(

)

[inline]

Definition at line 29 of file rwlock.h.

: readers(0), writers(0) {}

virtual NonblockingRWLock::~NonblockingRWLock

(

)

[inline, virtual]

Definition at line 30 of file rwlock.h.

{}

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Member Function Documentation

static const char* NonblockingRWLock::name

(

)

[inline, static]

Definition at line 28 of file rwlock.h.

{ return "Nonblocking_Reader_Lock"; }

void NonblockingRWLock::enter_read

(

void

)

[inline]

Definition at line 34 of file rwlock.h.

References atomic_dec(), atomic_inc(), l, SystemLock::lock(), readers, SystemLock::unlock(), and writers.

        {
                atomic_inc(&readers);
                if(writers > 0)
                {
                        atomic_dec(&readers);
                        l.lock();
                        atomic_inc(&readers);
                        l.unlock();
                }
        }

void NonblockingRWLock::leave_read

(

void

)

[inline]

Definition at line 49 of file rwlock.h.

References atomic_dec(), and readers.

        {
                atomic_dec(&readers);
        }

void NonblockingRWLock::enter_write

(

void

)

[inline]

Definition at line 57 of file rwlock.h.

References atomic_inc(), l, SystemLock::lock(), readers, thread_yield(), and writers.

        {
                l.lock();
                atomic_inc(&writers);
                while(readers) thread_yield();
        }

void NonblockingRWLock::leave_write

(

void

)

[inline]

Definition at line 67 of file rwlock.h.

References atomic_dec(), l, SystemLock::unlock(), and writers.

        {
                atomic_dec(&writers);
                l.unlock();
        }

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Member Data Documentation

volatile int NonblockingRWLock::readers [private]

Definition at line 74 of file rwlock.h.

Referenced by enter_read(), enter_write(), and leave_read().

volatile int NonblockingRWLock::writers [private]

Definition at line 75 of file rwlock.h.

Referenced by enter_read(), enter_write(), and leave_write().

SystemLock NonblockingRWLock::l [private]

Definition at line 76 of file rwlock.h.

Referenced by enter_read(), enter_write(), and leave_write().

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

• C:/rwlock/rwlock.h