forked from Archive/PX4-Autopilot
137 lines
4.7 KiB
C
137 lines
4.7 KiB
C
/****************************************************************************
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* netutils/thttpd/timers.h
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* Header file for THTTPD timers package
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*
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* Copyright (C) 2009 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Derived from the file of the same name in THTTPD:
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*
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* Copyright © 1995,1998,1999,2000 by Jef Poskanzer <jef@mail.acme.com>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __NETUTILS_THTTPD_TIMERS_H
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#define __NETUTILS_THTTPD_TIMERS_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <time.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#ifndef INFTIM
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# define INFTIM -1
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#endif
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/* ClientData is a random value that tags along with a timer. The client
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* can use it for whatever, and it gets passed to the callback when the
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* timer triggers.
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*/
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typedef union
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{
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void *p;
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int i;
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long l;
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} ClientData;
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/* The TimerProc gets called when the timer expires. It gets passed
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* the ClientData associated with the timer, and a timeval in case
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* it wants to schedule another timer.
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*/
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typedef void TimerProc(ClientData client_data, struct timeval *nowP);
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/* The Timer struct. */
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typedef struct TimerStruct
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{
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TimerProc *timer_proc;
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ClientData client_data;
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long msecs;
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int periodic;
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struct timeval time;
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struct TimerStruct *prev;
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struct TimerStruct *next;
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int hash;
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} Timer;
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/****************************************************************************
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* Public Data
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****************************************************************************/
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extern ClientData JunkClientData; /* For use when you don't care */
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/* Initialize the timer package. */
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extern void tmr_init(void);
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/* Set up a timer, either periodic or one-shot. Returns (Timer*) 0 on errors. */
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extern Timer *tmr_create(struct timeval *nowP, TimerProc * timer_proc,
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ClientData client_data, long msecs, int periodic);
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/* Returns a timeout in milliseconds indicating how long until the next timer
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* triggers. You can just put the call to this routine right in your poll().
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* Returns INFTIM (-1) if no timers are pending.
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*/
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extern long tmr_mstimeout(struct timeval *nowP);
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/* Run the list of timers. Your main program needs to call this every so often. */
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extern void tmr_run(struct timeval *nowP);
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/* Deschedule a timer. Note that non-periodic timers are automatically
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* descheduled when they run, so you don't have to call this on them.
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*/
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extern void tmr_cancel(Timer *timer);
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/* Clean up the timers package, freeing any unused storage. */
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extern void tmr_cleanup(void);
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/* Cancel all timers and free storage, usually in preparation for exitting. */
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extern void tmr_destroy(void);
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#endif /* __NETUTILS_THTTPD_TIMERS_H */
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