be_process_semaphore.h

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/*
 * This software was developed at the National Institute of Standards and
 * Technology (NIST) by employees of the Federal Government in the course
 * of their official duties. Pursuant to title 17 Section 105 of the
 * United States Code, this software is not subject to copyright protection
 * and is in the public domain. NIST assumes no responsibility whatsoever for
 * its use by other parties, and makes no guarantees, expressed or implied,
 * about its quality, reliability, or any other characteristic.
 */
 
#ifndef __BE_PROCESS_SEMAPHORE_H__
#define __BE_PROCESS_SEMAPHORE_H__
 
#include <sys/types.h>
#include <semaphore.h>
#include <stdint.h>
 
#include <string>
 
namespace BiometricEvaluation
{
        namespace Process
        {
                class Semaphore
                {
                public:
                        Semaphore(
                            const std::string &name,
                            const mode_t mode,
                            const int value,
                            const bool force = false);
 
                        Semaphore(
                            const std::string &name);
 
                        ~Semaphore();
 
                        bool wait(const bool interruptible);
 
                        bool trywait(const bool interruptible);
 
                        bool timedwait(
                            const uint64_t interval,
                            const bool interruptible);
 
                        void post();
 
                        std::string getName();
 
                protected:
 
                private:                
                        sem_t * _semaphore;
                        std::string _name;
                        pid_t _creatorPID;
                };
        }
}
 
#endif /* __BE_PROCESS_SEMAPHORE_H__ */