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/* -*- C++ -*- */
// $Id$
// ============================================================================
//
// = LIBRARY
// none
//
// = FILENAME
// ID_Generator.h
//
// = AUTHOR
// Nanbor Wang
//
// ============================================================================
#if !defined (ACE_ID_GENERATOR_H)
#define ACE_ID_GENERATOR_h
#include "ace/Synch.h"
#define ACE_OFFER_ID_LENGTH 21
class ACE_Export ACE_ID_Generator
// Nanbor, please make sure you use the official ACE "= TITLE" syntax
// here. Also, what is "beckry's algorithm?" Do you mean "Berkeley's
// algorithm?"
// Generate an offer ID according to current time and
// avoid duplicate ID. Using a similar method like
// beckry's algorithm.
{
public:
static char *get_new_id (char *id);
// allocate a new ID string and point <id> to it.
private:
static void get_serial_id (time_t &t, size_t &s);
// Atomically get info required to generate an offer ID.
static ACE_SYNCH_MUTEX *get_lock (void);
// Get the lock instance.
static time_t last_time_;
// Record the time last offer ID generated.
static size_t last_number_;
// Record serial number of last offer ID with same
// generation time.
static ACE_SYNCH_MUTEX *lock_;
// mutex to access private member.
};
#endif /* ACE_ID_GENERATOR_H */
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