?? txe_tmch.c
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/**************************************************************************/
/* */
/* Copyright (c) 1996-2000 by Express Logic Inc. */
/* */
/* This software is copyrighted by and is the sole property of Express */
/* Logic, Inc. All rights, title, ownership, or other interests */
/* in the software remain the property of Express Logic, Inc. This */
/* software may only be used in accordance with the corresponding */
/* license agreement. Any unauthorized use, duplication, transmission, */
/* distribution, or disclosure of this software is expressly forbidden. */
/* */
/* This Copyright notice may not be removed or modified without prior */
/* written consent of Express Logic, Inc. */
/* */
/* Express Logic, Inc. reserves the right to modify this software */
/* without notice. */
/* */
/* Express Logic, Inc. */
/* 11440 West Bernardo Court info@expresslogic.com */
/* Suite 366 http://www.expresslogic.com */
/* San Diego, CA 92127 */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** ThreadX Component */
/** */
/** Timer Management (TIM) */
/** */
/**************************************************************************/
/**************************************************************************/
#define TX_SOURCE_CODE
/* Include necessary system files. */
#include "tx_api.h"
#include "tx_ini.h"
#include "tx_thr.h"
#include "tx_tim.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _txe_timer_change PORTABLE C */
/* 3.0f */
/* AUTHOR */
/* */
/* William E. Lamie, Express Logic, Inc. */
/* */
/* DESCRIPTION */
/* */
/* This function checks for errors in the application timer change */
/* function call. */
/* */
/* INPUT */
/* */
/* timer_ptr Pointer to timer control block */
/* initial_ticks Initial expiration ticks */
/* reschedule_ticks Reschedule ticks */
/* */
/* OUTPUT */
/* */
/* TX_TIMER_ERROR Invalid application timer pointer */
/* TX_TICK_ERROR Invalid initial tick value of 0 */
/* TX_CALLER_ERROR Invalid caller of this function */
/* status Actual completion status */
/* */
/* CALLS */
/* */
/* _tx_timer_change Actual timer change function */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 12-31-1996 William E. Lamie Initial Version 3.0 */
/* 11-11-1997 William E. Lamie Modified comment(s), */
/* resulting in version 3.0b. */
/* 01-01-1999 William E. Lamie Modified comment(s), */
/* resulting in version 3.0e. */
/* 11-01-1999 William E. Lamie Modified comment(s), and */
/* removed error detection for */
/* ISR callers, resulting in */
/* version 3.0f. */
/* */
/**************************************************************************/
UINT _txe_timer_change(TX_TIMER *timer_ptr, ULONG initial_ticks, ULONG reschedule_ticks)
{
REG_1 UINT status; /* Return status */
/* First, check for an invalid timer pointer. */
if ((!timer_ptr) || (timer_ptr -> tx_timer_id != TX_TIMER_ID))
/* Timer pointer is invalid, return appropriate error code. */
return(TX_TIMER_ERROR);
/* Check for an illegal initial tick value. */
if (!initial_ticks)
/* Invalid initial tick value, return appropriate error code. */
return(TX_TICK_ERROR);
/* Check for invalid caller of this function. */
if (_tx_thread_system_state == TX_INITIALIZE_IN_PROGRESS)
/* Invalid caller of this function, return appropriate error code. */
return(TX_CALLER_ERROR);
/* Call actual application timer function. */
status = _tx_timer_change(timer_ptr, initial_ticks, reschedule_ticks);
/* Return actual completion status. */
return(status);
}
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