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/* -*- C++ -*- */
// $Id$
// ============================================================================
//
// = LIBRARY
// ace
//
// = FILENAME
// System_Time.h
//
// = AUTHOR
// Prashant Jain, Tim H. Harrison and Douglas C. Schmidt
//
// ============================================================================
#ifndef ACE_SYSTEM_TIME_H
#include "ace/pre.h"
#define ACE_SYSTEM_TIME_H
#include "ace/OS.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "ace/Memory_Pool.h"
#include "ace/Malloc_T.h"
class ACE_Export ACE_System_Time
{
// = TITLE
// Defines the timer services of the OS interface to access the
// system time either on the local host or on the central time
// server in the network.
public:
enum Sync_Mode { Jump, Adjust };
// enumeration types to specify mode of synchronization with master
// clock. Jump will set local system time directly (thus possibly
// producing time gaps or ambiguous local system times. Adjust will
// smoothly slow down or speed up the local system clock to reach
// the system time of the master clock.
ACE_System_Time (LPCTSTR poolname = 0);
// Default constructor.
~ACE_System_Time (void);
// Default destructor.
static int get_local_system_time (ACE_UINT32 &time_out);
// Get the local system time, i.e., the value returned by
// <ACE_OS::time>.
static int get_local_system_time (ACE_Time_Value &time_out);
// Get the local system time, i.e., the value returned by
// <ACE_OS::time>.
int get_master_system_time (ACE_UINT32 &time_out);
// Get the system time of the central time server.
int get_master_system_time (ACE_Time_Value &time_out);
// Get the system time of the central time server.
int sync_local_system_time (ACE_System_Time::Sync_Mode mode);
// synchronize local system time with the central time server using
// specified mode.
private:
typedef ACE_Malloc <ACE_MMAP_MEMORY_POOL, ACE_Null_Mutex> MALLOC;
typedef ACE_Allocator_Adapter<MALLOC> ALLOCATOR;
ALLOCATOR *shmem_;
// Our allocator (used for obtaining system time from shared memory).
TCHAR poolname_[MAXPATHLEN + 1];
// The name of the pool used by the allocator.
long *delta_time_;
// Pointer to delta time kept in shared memory.
};
#include "ace/post.h"
#endif /* ACE_SYSTEM_TIME_H */
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