170 lines
8.2 KiB
C
170 lines
8.2 KiB
C
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/**************************************************************************/
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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_create 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 creates an application timer from the specified */
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/* input. */
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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_ptr Pointer to timer name */
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/* expiration_function Application expiration function */
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/* initial_ticks Initial expiration ticks */
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/* reschedule_ticks Reschedule ticks */
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/* auto_activate Automatic activation flag */
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/* */
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/* OUTPUT */
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/* */
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/* TX_SUCCESS Successful completion status */
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/* */
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/* CALLS */
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/* */
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/* _tx_timer_system_activate Timer activation function */
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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_create(TX_TIMER *timer_ptr, CHAR *name_ptr,
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VOID (*expiration_function)(ULONG id), ULONG expiration_input,
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ULONG initial_ticks, ULONG reschedule_ticks, UINT auto_activate)
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{
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TX_INTERRUPT_SAVE_AREA
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TX_TIMER *next_timer;
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TX_TIMER *previous_timer;
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/* Initialize timer control block to all zeros. */
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TX_MEMSET(timer_ptr, 0, (sizeof(TX_TIMER)));
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/* Setup the basic timer fields. */
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timer_ptr -> tx_timer_name = name_ptr;
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timer_ptr -> tx_timer_internal.tx_timer_internal_remaining_ticks = initial_ticks;
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timer_ptr -> tx_timer_internal.tx_timer_internal_re_initialize_ticks = reschedule_ticks;
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timer_ptr -> tx_timer_internal.tx_timer_internal_timeout_function = expiration_function;
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timer_ptr -> tx_timer_internal.tx_timer_internal_timeout_param = expiration_input;
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/* Disable interrupts to put the timer on the created list. */
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TX_DISABLE
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/* Setup the timer ID to make it valid. */
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timer_ptr -> tx_timer_id = TX_TIMER_ID;
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/* Place the timer on the list of created application timers. First,
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check for an empty list. */
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if (_tx_timer_created_count == TX_EMPTY)
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{
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/* The created timer list is empty. Add timer to empty list. */
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_tx_timer_created_ptr = timer_ptr;
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timer_ptr -> tx_timer_created_next = timer_ptr;
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timer_ptr -> tx_timer_created_previous = timer_ptr;
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}
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else
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{
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/* This list is not NULL, add to the end of the list. */
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next_timer = _tx_timer_created_ptr;
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previous_timer = next_timer -> tx_timer_created_previous;
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/* Place the new timer in the list. */
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next_timer -> tx_timer_created_previous = timer_ptr;
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previous_timer -> tx_timer_created_next = timer_ptr;
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/* Setup this timer's created links. */
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timer_ptr -> tx_timer_created_previous = previous_timer;
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timer_ptr -> tx_timer_created_next = next_timer;
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}
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/* Increment the number of created timers. */
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_tx_timer_created_count++;
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/* Optional timer create extended processing. */
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TX_TIMER_CREATE_EXTENSION(timer_ptr)
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/* If trace is enabled, register this object. */
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TX_TRACE_OBJECT_REGISTER(TX_TRACE_OBJECT_TYPE_TIMER, timer_ptr, name_ptr, initial_ticks, reschedule_ticks)
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/* If trace is enabled, insert this call in the trace buffer. */
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TX_TRACE_IN_LINE_INSERT(TX_TRACE_TIMER_CREATE, timer_ptr, initial_ticks, reschedule_ticks, auto_activate, TX_TRACE_TIMER_EVENTS)
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/* Log this kernel call. */
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TX_EL_TIMER_CREATE_INSERT
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/* Determine if this timer needs to be activated. */
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if (auto_activate == TX_AUTO_ACTIVATE)
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{
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#ifdef TX_TIMER_ENABLE_PERFORMANCE_INFO
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/* Increment the total activations counter. */
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_tx_timer_performance_activate_count++;
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/* Increment the number of activations on this timer. */
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timer_ptr -> tx_timer_performance_activate_count++;
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#endif
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/* Call actual activation function. */
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_tx_timer_system_activate(&(timer_ptr -> tx_timer_internal));
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}
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/* Restore interrupts. */
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TX_RESTORE
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/* Return TX_SUCCESS. */
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return(TX_SUCCESS);
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}
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