PLearn::CountEventsSemaphore Class Reference

#include <Semaphores.h>

Collaboration diagram for PLearn::CountEventsSemaphore:

[legend]List of all members.

Public Member Functions
	CountEventsSemaphore (int nb_semaphores=1)
	construct given number of semaphores for event counters
	CountEventsSemaphore (SemId semid)
	access an existing semaphore
void	signal (int type=0)
	Signal the occurence of event of given "type", where type can range from 0 to n_semaphores-1.
void	wait (int n_occurences, int type=0)
int	value (int type=0)
	return current value of counter for given "type" of event
void	setValue (int value, int resource=0)
	set value of counter
	~CountEventsSemaphore ()
	release the semaphore upon destruction of object
Protected Attributes
SemId	id
	semaphore id provided by the operating system at construction
bool	owner
	true if this process is the owner of the semaphore, i.e
int	n_semaphores
	there can be several semaphores in the same object

---

Constructor & Destructor Documentation

PLearn::CountEventsSemaphore::CountEventsSemaphore (  int  nb_semaphores = 1  )

construct given number of semaphores for event counters Definition at line 137 of file Semaphores.cc. References PLearn::endl(), n_semaphores, PLERROR, and PLearn::semun::val.

PLearn::CountEventsSemaphore::CountEventsSemaphore (  SemId  semid  )

access an existing semaphore Definition at line 160 of file Semaphores.cc. References n_semaphores, and PLERROR.

PLearn::CountEventsSemaphore::~CountEventsSemaphore (   )

release the semaphore upon destruction of object Definition at line 215 of file Semaphores.cc. References PLearn::endl(), owner, PLERROR, and PLearn::semun::val.

---

Member Function Documentation

void PLearn::CountEventsSemaphore::setValue (  int  value, int  resource = 0 )

set value of counter Definition at line 206 of file Semaphores.cc. References PLERROR, and PLearn::semun::val.

void PLearn::CountEventsSemaphore::signal (  int  type = 0  )

Signal the occurence of event of given "type", where type can range from 0 to n_semaphores-1. No waiting. Definition at line 173 of file Semaphores.cc. References PLERROR.

int PLearn::CountEventsSemaphore::value (  int  type = 0  )

return current value of counter for given "type" of event Definition at line 185 of file Semaphores.cc. References PLearn::semun::val.

void PLearn::CountEventsSemaphore::wait (  int  n_occurences, int  type = 0 )

Wait for n_occurences of event of given "type" to have occured, where "type" can range from 0 to n_semaphoes-1. When this occurs, the event count for this type of event is reset to 0. Definition at line 191 of file Semaphores.cc. References PLERROR.

---

Member Data Documentation

SemId PLearn::CountEventsSemaphore::id [protected]

semaphore id provided by the operating system at construction Definition at line 133 of file Semaphores.h.

int PLearn::CountEventsSemaphore::n_semaphores [protected]

there can be several semaphores in the same object Definition at line 136 of file Semaphores.h. Referenced by CountEventsSemaphore().

bool PLearn::CountEventsSemaphore::owner [protected]

true if this process is the owner of the semaphore, i.e the semaphore will be released with this object is deleted Definition at line 134 of file Semaphores.h. Referenced by ~CountEventsSemaphore().

---

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

• Semaphores.h
• Semaphores.cc

---