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/**************************************************************************/
/* */
/* Copyright (c) Microsoft Corporation. All rights reserved. */
/* */
/* This software is licensed under the Microsoft Software License */
/* Terms for Microsoft Azure RTOS. Full text of the license can be */
/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
/* and in the root directory of this software. */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** ThreadX Component */
/** */
/** Timer */
/** */
/**************************************************************************/
/**************************************************************************/
#define TX_SOURCE_CODE
/* Include necessary system files. */
#include "tx_api.h"
#include "tx_trace.h"
#include "tx_timer.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _tx_timer_create PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function creates an application timer from the specified */
/* input. */
/* */
/* INPUT */
/* */
/* timer_ptr Pointer to timer control block */
/* name_ptr Pointer to timer name */
/* expiration_function Application expiration function */
/* initial_ticks Initial expiration ticks */
/* reschedule_ticks Reschedule ticks */
/* auto_activate Automatic activation flag */
/* */
/* OUTPUT */
/* */
/* TX_SUCCESS Successful completion status */
/* */
/* CALLS */
/* */
/* _tx_timer_system_activate Timer activation function */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 William E. Lamie Initial Version 6.0 */
/* 09-30-2020 Yuxin Zhou Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
UINT _tx_timer_create(TX_TIMER *timer_ptr, CHAR *name_ptr,
VOID (*expiration_function)(ULONG id), ULONG expiration_input,
ULONG initial_ticks, ULONG reschedule_ticks, UINT auto_activate)
{
TX_INTERRUPT_SAVE_AREA
TX_TIMER *next_timer;
TX_TIMER *previous_timer;
/* Initialize timer control block to all zeros. */
TX_MEMSET(timer_ptr, 0, (sizeof(TX_TIMER)));
/* Setup the basic timer fields. */
timer_ptr -> tx_timer_name = name_ptr;
timer_ptr -> tx_timer_internal.tx_timer_internal_remaining_ticks = initial_ticks;
timer_ptr -> tx_timer_internal.tx_timer_internal_re_initialize_ticks = reschedule_ticks;
timer_ptr -> tx_timer_internal.tx_timer_internal_timeout_function = expiration_function;
timer_ptr -> tx_timer_internal.tx_timer_internal_timeout_param = expiration_input;
/* Disable interrupts to put the timer on the created list. */
TX_DISABLE
/* Setup the timer ID to make it valid. */
timer_ptr -> tx_timer_id = TX_TIMER_ID;
/* Place the timer on the list of created application timers. First,
check for an empty list. */
if (_tx_timer_created_count == TX_EMPTY)
{
/* The created timer list is empty. Add timer to empty list. */
_tx_timer_created_ptr = timer_ptr;
timer_ptr -> tx_timer_created_next = timer_ptr;
timer_ptr -> tx_timer_created_previous = timer_ptr;
}
else
{
/* This list is not NULL, add to the end of the list. */
next_timer = _tx_timer_created_ptr;
previous_timer = next_timer -> tx_timer_created_previous;
/* Place the new timer in the list. */
next_timer -> tx_timer_created_previous = timer_ptr;
previous_timer -> tx_timer_created_next = timer_ptr;
/* Setup this timer's created links. */
timer_ptr -> tx_timer_created_previous = previous_timer;
timer_ptr -> tx_timer_created_next = next_timer;
}
/* Increment the number of created timers. */
_tx_timer_created_count++;
/* Optional timer create extended processing. */
TX_TIMER_CREATE_EXTENSION(timer_ptr)
/* If trace is enabled, register this object. */
TX_TRACE_OBJECT_REGISTER(TX_TRACE_OBJECT_TYPE_TIMER, timer_ptr, name_ptr, initial_ticks, reschedule_ticks)
/* If trace is enabled, insert this call in the trace buffer. */
TX_TRACE_IN_LINE_INSERT(TX_TRACE_TIMER_CREATE, timer_ptr, initial_ticks, reschedule_ticks, auto_activate, TX_TRACE_TIMER_EVENTS)
/* Log this kernel call. */
TX_EL_TIMER_CREATE_INSERT
/* Determine if this timer needs to be activated. */
if (auto_activate == TX_AUTO_ACTIVATE)
{
#ifdef TX_TIMER_ENABLE_PERFORMANCE_INFO
/* Increment the total activations counter. */
_tx_timer_performance_activate_count++;
/* Increment the number of activations on this timer. */
timer_ptr -> tx_timer_performance_activate_count++;
#endif
/* Call actual activation function. */
_tx_timer_system_activate(&(timer_ptr -> tx_timer_internal));
}
/* Restore interrupts. */
TX_RESTORE
/* Return TX_SUCCESS. */
return(TX_SUCCESS);
}
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