generated from Template/H563ZI-HAL-CMake-Template
251 lines
10 KiB
C
251 lines
10 KiB
C
/**************************************************************************/
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/* */
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/* Copyright (c) Microsoft Corporation. All rights reserved. */
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/* */
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/* This software is licensed under the Microsoft Software License */
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/* Terms for Microsoft Azure RTOS. Full text of the license can be */
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/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
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/* and in the root directory of this software. */
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/* */
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/**************************************************************************/
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/**************************************************************************/
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/**************************************************************************/
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/** */
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/** ThreadX Component */
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/** */
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/** Timer */
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/** */
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/**************************************************************************/
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/**************************************************************************/
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#define TX_SOURCE_CODE
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/* Include necessary system files. */
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#include "tx_api.h"
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#include "tx_trace.h"
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#include "tx_timer.h"
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/**************************************************************************/
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/* */
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/* FUNCTION RELEASE */
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/* */
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/* _tx_timer_info_get PORTABLE C */
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/* 6.1 */
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/* AUTHOR */
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/* */
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/* William E. Lamie, Microsoft Corporation */
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/* */
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/* DESCRIPTION */
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/* */
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/* This function retrieves information from the specified timer. */
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/* */
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/* INPUT */
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/* */
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/* timer_ptr Pointer to timer control block */
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/* name Destination for the timer name */
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/* active Destination for active flag */
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/* remaining_ticks Destination for remaining ticks */
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/* before expiration */
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/* reschedule_ticks Destination for reschedule ticks */
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/* next_timer Destination for next timer on the */
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/* created list */
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/* */
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/* OUTPUT */
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/* */
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/* status Completion status */
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/* */
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/* CALLS */
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/* */
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/* None */
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/* */
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/* CALLED BY */
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/* */
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/* Application Code */
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/* */
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/* RELEASE HISTORY */
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/* */
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/* DATE NAME DESCRIPTION */
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/* */
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/* 05-19-2020 William E. Lamie Initial Version 6.0 */
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/* 09-30-2020 Yuxin Zhou Modified comment(s), */
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/* resulting in version 6.1 */
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/* */
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/**************************************************************************/
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UINT _tx_timer_info_get(TX_TIMER *timer_ptr, CHAR **name, UINT *active, ULONG *remaining_ticks,
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ULONG *reschedule_ticks, TX_TIMER **next_timer)
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{
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TX_INTERRUPT_SAVE_AREA
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TX_TIMER_INTERNAL *internal_ptr;
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TX_TIMER_INTERNAL **list_head;
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ULONG ticks_left;
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UINT timer_active;
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UINT active_timer_list;
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/* Disable interrupts. */
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TX_DISABLE
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/* If trace is enabled, insert this event into the trace buffer. */
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TX_TRACE_IN_LINE_INSERT(TX_TRACE_TIMER_INFO_GET, timer_ptr, TX_POINTER_TO_ULONG_CONVERT(&ticks_left), 0, 0, TX_TRACE_TIMER_EVENTS)
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/* Log this kernel call. */
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TX_EL_TIMER_INFO_GET_INSERT
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/* Retrieve the name of the timer. */
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if (name != TX_NULL)
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{
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*name = timer_ptr -> tx_timer_name;
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}
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/* Pickup address of internal timer structure. */
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internal_ptr = &(timer_ptr -> tx_timer_internal);
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/* Retrieve all the pertinent information and return it in the supplied
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destinations. */
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/* Default active to false. */
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timer_active = TX_FALSE;
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/* Default the ticks left to the remaining ticks. */
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ticks_left = internal_ptr -> tx_timer_internal_remaining_ticks;
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/* Determine if the timer is still active. */
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if (internal_ptr -> tx_timer_internal_list_head != TX_NULL)
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{
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/* Indicate this timer is active. */
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timer_active = TX_TRUE;
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/* Default the active timer list flag to false. */
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active_timer_list = TX_FALSE;
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/* Determine if the timer is still active. */
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if (internal_ptr -> tx_timer_internal_list_head >= _tx_timer_list_start)
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{
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/* Determine if the list head is before the end of the list. */
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if (internal_ptr -> tx_timer_internal_list_head < _tx_timer_list_end)
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{
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/* This timer is active and has not yet expired. */
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active_timer_list = TX_TRUE;
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}
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}
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/* Determine if the timer is on the active timer list. */
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if (active_timer_list == TX_TRUE)
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{
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/* Calculate the amount of time that has elapsed since the timer
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was activated. */
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/* Setup the list head pointer. */
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list_head = internal_ptr -> tx_timer_internal_list_head;
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/* Is this timer's entry after the current timer pointer? */
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if (internal_ptr -> tx_timer_internal_list_head >= _tx_timer_current_ptr)
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{
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/* Calculate ticks left to expiration - just the difference between this
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timer's entry and the current timer pointer. */
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ticks_left = ((TX_TIMER_POINTER_DIF(list_head, _tx_timer_current_ptr)) + ((ULONG) 1));
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}
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else
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{
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/* Calculate the ticks left with a wrapped list condition. */
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ticks_left = ((TX_TIMER_POINTER_DIF(list_head, _tx_timer_list_start)));
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ticks_left = ticks_left + ((TX_TIMER_POINTER_DIF(_tx_timer_list_end, _tx_timer_current_ptr)) + ((ULONG) 1));
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}
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/* Adjust the remaining ticks accordingly. */
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if (internal_ptr -> tx_timer_internal_remaining_ticks > TX_TIMER_ENTRIES)
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{
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/* Subtract off the last full pass through the timer list and add the
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time left. */
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ticks_left = (internal_ptr -> tx_timer_internal_remaining_ticks - TX_TIMER_ENTRIES) + ticks_left;
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}
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}
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else
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{
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/* The timer is not on the actual timer list so it must either be being processed
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or on a temporary list to be processed. */
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/* Check to see if this timer is the timer currently being processed. */
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if (_tx_timer_expired_timer_ptr == internal_ptr)
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{
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/* Timer dispatch routine is executing, waiting to execute, or just finishing. No more remaining ticks for this expiration. */
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ticks_left = ((ULONG) 0);
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}
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else
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{
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/* Timer is not the one being processed, which means it must be on the temporary expiration list
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waiting to be processed. */
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/* Calculate the remaining ticks for a timer in the process of expiring. */
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if (ticks_left > TX_TIMER_ENTRIES)
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{
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/* Calculate the number of ticks remaining. */
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ticks_left = internal_ptr -> tx_timer_internal_remaining_ticks - TX_TIMER_ENTRIES;
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}
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else
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{
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/* Timer dispatch routine is waiting to execute, no more remaining ticks for this expiration. */
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ticks_left = ((ULONG) 0);
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}
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}
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}
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}
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/* Setup return values for an inactive timer. */
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if (active != TX_NULL)
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{
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/* Setup the timer active indication. */
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*active = timer_active;
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}
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if (remaining_ticks != TX_NULL)
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{
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/* Setup the default remaining ticks value. */
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*remaining_ticks = ticks_left;
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}
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/* Pickup the reschedule ticks value. */
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if (reschedule_ticks != TX_NULL)
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{
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*reschedule_ticks = internal_ptr -> tx_timer_internal_re_initialize_ticks;
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}
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/* Pickup the next created application timer. */
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if (next_timer != TX_NULL)
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{
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*next_timer = timer_ptr -> tx_timer_created_next;
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}
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/* Restore interrupts. */
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TX_RESTORE
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/* Return completion status. */
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return(TX_SUCCESS);
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}
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