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98 lines
2.7 KiB
C++
98 lines
2.7 KiB
C++
// -*- C++ -*-
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//=============================================================================
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/**
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* @file System_Time.h
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*
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* @author Prashant Jain
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* @author Tim H. Harrison
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* @author Douglas C. Schmidt
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*/
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//=============================================================================
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#ifndef ACE_SYSTEM_TIME_H
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#define ACE_SYSTEM_TIME_H
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#include /**/ "ace/pre.h"
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#include /**/ "ace/config-all.h"
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#if !defined (ACE_LACKS_PRAGMA_ONCE)
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# pragma once
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#endif /* ACE_LACKS_PRAGMA_ONCE */
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#include "ace/Global_Macros.h"
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#include "ace/os_include/os_time.h" /* For time_t. */
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#include "ace/os_include/os_limits.h" /* For MAXPATHLEN. */
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#include "ace/MMAP_Memory_Pool.h"
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ACE_BEGIN_VERSIONED_NAMESPACE_DECL
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template<ACE_MEM_POOL_1, class ACE_LOCK> class ACE_Malloc;
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template<class MALLOC> class ACE_Allocator_Adapter;
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class ACE_Null_Mutex;
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class ACE_Time_Value;
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class ACE_MMAP_Memory_Pool;
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/**
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* @class ACE_System_Time
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*
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* @brief Defines the timer services of the OS interface to access the
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* system time either on the local host or on the central time
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* server in the network.
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*/
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class ACE_Export ACE_System_Time
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{
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public:
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/**
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* Enumeration types to specify mode of synchronization with master
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* clock. Jump will set local system time directly (thus possibly
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* producing time gaps or ambiguous local system times. Adjust will
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* smoothly slow down or speed up the local system clock to reach
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* the system time of the master clock.
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*/
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enum Sync_Mode { Jump, Adjust };
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/// Default constructor.
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ACE_System_Time (const ACE_TCHAR *poolname = 0);
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/// Default destructor.
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~ACE_System_Time (void);
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/// Get the local system time, i.e., the value returned by
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/// ACE_OS::time().
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static int get_local_system_time (time_t & time_out);
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/// Get the local system time, i.e., the value returned by
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/// ACE_OS::time().
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static int get_local_system_time (ACE_Time_Value &time_out);
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/// Get the system time of the central time server.
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int get_master_system_time (time_t & time_out);
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/// Get the system time of the central time server.
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int get_master_system_time (ACE_Time_Value &time_out);
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/// Synchronize local system time with the central time server using
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/// specified mode.
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int sync_local_system_time (ACE_System_Time::Sync_Mode mode);
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private:
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typedef ACE_Malloc<ACE_MMAP_MEMORY_POOL, ACE_Null_Mutex> MALLOC;
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typedef ACE_Allocator_Adapter<MALLOC> ALLOCATOR;
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/// Our allocator (used for obtaining system time from shared memory).
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ALLOCATOR * shmem_;
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/// The name of the pool used by the allocator.
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ACE_TCHAR poolname_[MAXPATHLEN + 1];
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/// Pointer to delta time kept in shared memory.
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long * delta_time_;
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};
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ACE_END_VERSIONED_NAMESPACE_DECL
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#include /**/ "ace/post.h"
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#endif /* ACE_SYSTEM_TIME_H */
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