4 * This is the header file for the Timer Control component.
6 * The timer callback control component provides a mechanism by which different
7 * client components can start a timer and have a supplied callback function
8 * invoked when the timer expires.
9 * The callbacks are all dispatched from one thread inside this component.
10 * Any component that needs to be called periodically should use this facility
11 * rather than create its own task with a sleep loop.
16 * IXP400 SW Release version 2.0
18 * -- Copyright Notice --
21 * Copyright 2001-2005, Intel Corporation.
22 * All rights reserved.
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26 * modification, are permitted provided that the following conditions
28 * 1. Redistributions of source code must retain the above copyright
29 * notice, this list of conditions and the following disclaimer.
30 * 2. Redistributions in binary form must reproduce the above copyright
31 * notice, this list of conditions and the following disclaimer in the
32 * documentation and/or other materials provided with the distribution.
33 * 3. Neither the name of the Intel Corporation nor the names of its contributors
34 * may be used to endorse or promote products derived from this software
35 * without specific prior written permission.
38 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
39 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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47 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * -- End of Copyright Notice --
55 * @defgroup IxTimerCtrl IXP400 Timer Control (IxTimerCtrl) API
57 * @brief The public API for the IXP400 Timer Control Component.
67 /* #include "Ossl.h" */
70 * #defines and macros used in this file.
74 * @ingroup IxTimerCtrl
76 * @def IX_TIMERCTRL_NO_FREE_TIMERS
78 * @brief Timer schedule return code.
80 * Indicates that the request to start a timer failed because
81 * all available timer resources are used.
83 #define IX_TIMERCTRL_NO_FREE_TIMERS 2
87 * @ingroup IxTimerCtrl
89 * @def IX_TIMERCTRL_PARAM_ERROR
91 * @brief Timer schedule return code.
93 * Indicates that the request to start a timer failed because
94 * the client has supplied invalid parameters.
96 #define IX_TIMERCTRL_PARAM_ERROR 3
100 * Typedefs whose scope is limited to this file.
104 * @ingroup IxTimerCtrl
106 * @brief A typedef for a pointer to a timer callback function.
107 * @para void * - This parameter is supplied by the client when the
108 * timer is started and passed back to the client in the callback.
109 * @note in general timer callback functions should not block or
110 * take longer than 100ms. This constraint is required to ensure that
111 * higher priority callbacks are not held up.
112 * All callbacks are called from the same thread.
113 * This thread is a shared resource.
114 * The parameter passed is provided when the timer is scheduled.
116 typedef void (*IxTimerCtrlTimerCallback)(void *userParam);
120 * @ingroup IxTimerCtrl
122 * @brief List used to identify the users of timers.
123 * @note The order in this list indicates priority. Components appearing
124 * higher in the list will be given priority over components lower in the
125 * list. When adding components, please insert at an appropriate position
126 * for priority ( i.e values should be less than IxTimerCtrlMaxPurpose ) .
130 IxTimerCtrlAdslPurpose,
131 /* Insert new purposes above this line only
133 IxTimerCtrlMaxPurpose
139 * Function definition
143 * @ingroup IxTimerCtrl
145 * @fn ixTimerCtrlSchedule(IxTimerCtrlTimerCallback func,
147 IxTimerCtrlPurpose purpose,
151 * @brief Schedules a callback function to be called after a period of "time".
152 * The callback function should not block or run for more than 100ms.
155 * @param func @ref IxTimerCtrlTimerCallback [in] - the callback function to be called.
156 * @param userParam void [in] - a parameter to send to the callback function, can be NULL.
157 * @param purpose @ref IxTimerCtrlPurpose [in] - the purpose of the callback, internally this component will
158 * decide the priority of callbacks with different purpose.
159 * @param relativeTime UINT32 [in] - time relative to now in milliseconds after which the callback
160 * will be called. The time must be greater than the duration of one OS tick.
161 * @param *timerId unsigned [out] - An id for the callback scheduled.
162 * This id can be used to cancel the callback.
164 * @li IX_SUCCESS - The timer was started successfully.
165 * @li IX_TIMERCTRL_NO_FREE_TIMERS - The timer was not started because the maximum number
166 * of running timers has been exceeded.
167 * @li IX_TIMERCTRL_PARAM_ERROR - The timer was not started because the client has supplied
168 * a NULL callback func, or the requested timeout is less than one OS tick.
169 * @note This function is re-entrant. The function accesses a list of running timers
170 * and may suspend the calling thread if this list is being accesed by another thread.
173 ixTimerCtrlSchedule(IxTimerCtrlTimerCallback func,
175 IxTimerCtrlPurpose purpose,
181 * @ingroup IxTimerCtrl
183 * @fn ixTimerCtrlScheduleRepeating(IxTimerCtrlTimerCallback func,
185 IxTimerCtrlPurpose purpose,
189 * @brief Schedules a callback function to be called after a period of "time".
190 * The callback function should not block or run for more than 100ms.
192 * @param func @ref IxTimerCtrlTimerCallback [in] - the callback function to be called.
193 * @param userParam void [in] - a parameter to send to the callback function, can be NULL.
194 * @param purpose @ref IxTimerCtrlPurpose [in] - the purpose of the callback, internally this component will
195 * decide the priority of callbacks with different purpose.
196 * @param interval UINT32 [in] - the interval in milliseconds between calls to func.
197 * @param timerId unsigned [out] - An id for the callback scheduled.
198 * This id can be used to cancel the callback.
200 * @li IX_SUCCESS - The timer was started successfully.
201 * @li IX_TIMERCTRL_NO_FREE_TIMERS - The timer was not started because the maximum number
202 * of running timers has been exceeded.
203 * @li IX_TIMERCTRL_PARAM_ERROR - The timer was not started because the client has supplied
204 * a NULL callback func, or the requested timeout is less than one OS tick.
205 * @note This function is re-entrant. The function accesses a list of running timers
206 * and may suspend the calling thread if this list is being accesed by another thread.
209 ixTimerCtrlScheduleRepeating(IxTimerCtrlTimerCallback func,
211 IxTimerCtrlPurpose purpose,
216 * @ingroup IxTimerCtrl
218 * @fn ixTimerCtrlCancel (unsigned id)
220 * @brief Cancels a scheduled callback.
222 * @param id unsigned [in] - the id of the callback to be cancelled.
224 * @li IX_SUCCESS - The timer was successfully stopped.
225 * @li IX_FAIL - The id parameter did not corrrespond to any running timer..
226 * @note This function is re-entrant. The function accesses a list of running timers
227 * and may suspend the calling thread if this list is being accesed by another thread.
230 ixTimerCtrlCancel (unsigned id);
233 * @ingroup IxTimerCtrl
235 * @fn ixTimerCtrlInit(void)
237 * @brief Initialise the Timer Control Component.
239 * @li IX_SUCCESS - The timer control component initialized successfully.
240 * @li IX_FAIL - The timer control component initialization failed,
241 * or the component was already initialized.
242 * @note This must be done before any other API function is called.
243 * This function should be called once only and is not re-entrant.
246 ixTimerCtrlInit(void);
250 * @ingroup IxTimerCtrl
252 * @fn ixTimerCtrlShow( void )
254 * @brief Display the status of the Timer Control Component.
256 * @note Displays a list of running timers.
257 * This function is not re-entrant. This function does not suspend the calling thread.
260 ixTimerCtrlShow( void );
262 #endif /* IXTIMERCTRL_H */