1c51feb3c5
This allows transmissions in symmetric mode to be scheduled independently from client transmissions. This reduces maximum delay in scheduling when chronyd is configured with a larger number of servers.
89 lines
3.3 KiB
C
89 lines
3.3 KiB
C
/*
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chronyd/chronyc - Programs for keeping computer clocks accurate.
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**********************************************************************
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* Copyright (C) Richard P. Curnow 1997-2002
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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**********************************************************************
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=======================================================================
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Exported header file for sched.c
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*/
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#ifndef GOT_SCHED_H
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#define GOT_SCHED_H
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#include "sysincl.h"
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/* Type for timeout IDs, valid IDs are always greater than zero */
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typedef unsigned int SCH_TimeoutID;
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typedef enum {
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SCH_ReservedTimeoutValue = 0,
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SCH_NtpClientClass,
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SCH_NtpPeerClass,
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SCH_NtpBroadcastClass,
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SCH_NumberOfClasses /* needs to be last */
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} SCH_TimeoutClass;
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typedef void* SCH_ArbitraryArgument;
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typedef void (*SCH_FileHandler)(int fd, int event, SCH_ArbitraryArgument);
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typedef void (*SCH_TimeoutHandler)(SCH_ArbitraryArgument);
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/* Exported functions */
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/* Initialisation function for the module */
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extern void SCH_Initialise(void);
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/* Finalisation function for the module */
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extern void SCH_Finalise(void);
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/* File events */
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#define SCH_FILE_INPUT 1
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#define SCH_FILE_OUTPUT 2
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#define SCH_FILE_EXCEPTION 4
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/* Register a handler for when select goes true on a file descriptor */
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extern void SCH_AddFileHandler(int fd, int events, SCH_FileHandler handler, SCH_ArbitraryArgument arg);
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extern void SCH_RemoveFileHandler(int fd);
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extern void SCH_SetFileHandlerEvents(int fd, int events);
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/* Get the time stamp taken after a file descriptor became ready or a timeout expired */
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extern void SCH_GetLastEventTime(struct timespec *cooked, double *err, struct timespec *raw);
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/* This queues a timeout to elapse at a given (raw) local time */
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extern SCH_TimeoutID SCH_AddTimeout(struct timespec *ts, SCH_TimeoutHandler handler, SCH_ArbitraryArgument arg);
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/* This queues a timeout to elapse at a given delta time relative to the current (raw) time */
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extern SCH_TimeoutID SCH_AddTimeoutByDelay(double delay, SCH_TimeoutHandler, SCH_ArbitraryArgument);
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/* This queues a timeout in a particular class, ensuring that the
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expiry time is at least a given separation away from any other
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timeout in the same class, given randomness is added to the delay
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and separation */
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extern SCH_TimeoutID SCH_AddTimeoutInClass(double min_delay, double separation, double randomness,
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SCH_TimeoutClass class,
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SCH_TimeoutHandler handler, SCH_ArbitraryArgument);
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/* The next one probably ought to return a status code */
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extern void SCH_RemoveTimeout(SCH_TimeoutID);
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extern void SCH_MainLoop(void);
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extern void SCH_QuitProgram(void);
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#endif /* GOT_SCHED_H */
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