ClassicRWLock Class Reference

#include <classic_rwlock.h>

List of all members.

Public Member Functions
	ClassicRWLock ()
	~ClassicRWLock ()
void	enter_write (void)
void	leave_write (void)
void	enter_read (void)
void	leave_read (void)
Static Public Member Functions
static const char *	name ()
Private Attributes
pthread_mutex_t	lock
pthread_cond_t	rcond
pthread_cond_t	wcond
int	lock_count
int	waiting_writers

---

Detailed Description

Definition at line 139 of file classic_rwlock.h.

---

Constructor & Destructor Documentation

ClassicRWLock::ClassicRWLock

(

)

[inline]

Definition at line 150 of file classic_rwlock.h.

References lock, lock_count, rcond, waiting_writers, and wcond.

        {
        pthread_mutex_init(&lock, NULL);
        pthread_cond_init(&wcond, NULL);
        pthread_cond_init(&rcond, NULL);
        lock_count = 0;
        waiting_writers = 0;
        }

ClassicRWLock::~ClassicRWLock

(

)

[inline]

Definition at line 158 of file classic_rwlock.h.

References lock, rcond, and wcond.

        {
        pthread_mutex_destroy(&lock);
        pthread_cond_destroy(&wcond);
        pthread_cond_destroy(&rcond);
        }

---

Member Function Documentation

void ClassicRWLock::enter_write

(

void

)

[inline]

Definition at line 165 of file classic_rwlock.h.

References lock, lock_count, waiting_writers, and wcond.

    {
        pthread_mutex_lock(&lock);
        waiting_writers++;
        while(lock_count)
            pthread_cond_wait(&wcond, &lock);
                waiting_writers--;
        lock_count = -1;
        pthread_mutex_unlock(&lock);
    }

void ClassicRWLock::leave_write

(

void

)

[inline]

Definition at line 175 of file classic_rwlock.h.

References lock, lock_count, rcond, waiting_writers, and wcond.

    {
        pthread_mutex_lock(&lock);
        lock_count = 0;
        if(waiting_writers == 0)
            pthread_cond_broadcast(&rcond);
        else
            pthread_cond_signal(&wcond);
        pthread_mutex_unlock(&lock);
    }

void ClassicRWLock::enter_read

(

void

)

[inline]

Definition at line 186 of file classic_rwlock.h.

References lock, lock_count, and rcond.

    {
        pthread_mutex_lock(&lock);
        while(lock_count < 0)
            pthread_cond_wait(&rcond, &lock);
        lock_count++;
                pthread_mutex_unlock(&lock);
    }

void ClassicRWLock::leave_read

(

void

)

[inline]

Definition at line 194 of file classic_rwlock.h.

References lock, lock_count, and wcond.

    {
        pthread_mutex_lock(&lock);
        lock_count--;
        if (!lock_count)
            pthread_cond_signal(&wcond);
        pthread_mutex_unlock(&lock);
    }

static const char* ClassicRWLock::name

(

)

[inline, static]

Definition at line 203 of file classic_rwlock.h.

{ return "ClassicRWLock"; }

---

Member Data Documentation

pthread_mutex_t ClassicRWLock::lock [private]

Definition at line 142 of file classic_rwlock.h.

Referenced by ClassicRWLock(), enter_read(), enter_write(), leave_read(), leave_write(), and ~ClassicRWLock().

pthread_cond_t ClassicRWLock::rcond [private]

Definition at line 143 of file classic_rwlock.h.

Referenced by ClassicRWLock(), enter_read(), leave_write(), and ~ClassicRWLock().

pthread_cond_t ClassicRWLock::wcond [private]

Definition at line 144 of file classic_rwlock.h.

Referenced by ClassicRWLock(), enter_write(), leave_read(), leave_write(), and ~ClassicRWLock().

int ClassicRWLock::lock_count [private]

Definition at line 145 of file classic_rwlock.h.

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

int ClassicRWLock::waiting_writers [private]

Definition at line 148 of file classic_rwlock.h.

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

---

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

• C:/rwlock/classic_rwlock.h