172 lines
4.7 KiB
C
172 lines
4.7 KiB
C
/*******************************************************************************
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*
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* Copyright (c) 2000-2003 Intel Corporation
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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 are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* * Neither name of Intel Corporation nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************/
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#ifndef TIMERTHREAD_H
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#define TIMERTHREAD_H
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/*!
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* \file
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*/
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#include "FreeList.h"
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#include "ithread.h"
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#include "LinkedList.h"
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#include "ThreadPool.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define INVALID_EVENT_ID (-10 & 1<<29)
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/* Timeout Types */
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/* absolute means in seconds from Jan 1, 1970 */
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/* relative means in seconds from current time */
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typedef enum timeoutType {ABS_SEC,REL_SEC} TimeoutType;
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/*!
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* A timer thread similar to the one in the Upnp SDK that allows
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* the scheduling of a job to run at a specified time in the future.
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*
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* Because the timer thread uses the thread pool there is no
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* gurantee of timing, only approximate timing.
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*
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* Uses ThreadPool, Mutex, Condition, Thread.
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*/
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typedef struct TIMERTHREAD
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{
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ithread_mutex_t mutex;
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ithread_cond_t condition;
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int lastEventId;
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LinkedList eventQ;
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int shutdown;
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FreeList freeEvents;
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ThreadPool *tp;
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} TimerThread;
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/*!
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* Struct to contain information for a timer event.
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*
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* Internal to the TimerThread.
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*/
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typedef struct TIMEREVENT
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{
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ThreadPoolJob job;
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/*! [in] Absolute time for event in seconds since Jan 1, 1970. */
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time_t eventTime;
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/*! [in] Long term or short term job. */
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Duration persistent;
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int id;
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} TimerEvent;
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/*!
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* \brief Initializes and starts timer thread.
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*
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* \return 0 on success, nonzero on failure. Returns error from
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* ThreadPoolAddPersistent on failure.
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*/
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int TimerThreadInit(
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/*! [in] Valid timer thread pointer. */
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TimerThread *timer,
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/*! [in] Valid thread pool to use. Must be started. Must be valid for
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* lifetime of timer. Timer must be shutdown BEFORE thread pool. */
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ThreadPool *tp);
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/*!
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* \brief Schedules an event to run at a specified time.
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*
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* \return 0 on success, nonzero on failure, EOUTOFMEM if not enough memory
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* to schedule job.
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*/
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int TimerThreadSchedule(
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/*! [in] Valid timer thread pointer. */
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TimerThread* timer,
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/*! [in] time of event. Either in absolute seconds, or relative
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* seconds in the future. */
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time_t time,
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/*! [in] either ABS_SEC, or REL_SEC. If REL_SEC, then the event
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* will be scheduled at the current time + REL_SEC. */
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TimeoutType type,
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/*! [in] Valid Thread pool job with following fields. */
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ThreadPoolJob *job,
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/*! [in] . */
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Duration duration,
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/*! [in] Id of timer event. (out, can be null). */
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int *id);
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/*!
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* \brief Removes an event from the timer Q.
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*
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* Events can only be removed before they have been placed in the thread pool.
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*
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* \return 0 on success, INVALID_EVENT_ID on failure.
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*/
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int TimerThreadRemove(
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/*! [in] Valid timer thread pointer. */
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TimerThread *timer,
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/*! [in] Id of event to remove. */
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int id,
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/*! [in] Space for thread pool job. */
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ThreadPoolJob *out);
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/*!
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* \brief Shutdown the timer thread.
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*
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* Events scheduled in the future will NOT be run.
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*
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* Timer thread should be shutdown BEFORE it's associated thread pool.
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*
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* \return 0 if succesfull, nonzero otherwise. Always returns 0.
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*/
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int TimerThreadShutdown(
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/*! [in] Valid timer thread pointer. */
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TimerThread *timer);
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#ifdef __cplusplus
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}
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#endif
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#endif /* TIMER_THREAD_H */
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