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/* *********************************************************************
* Broadcom Common Firmware Environment (CFE)
*
* Timer routines File: cfe_timer.c
*
* This module manages the list of routines to call periodically
* during "background processing." CFE has no interrupts or
* multitasking, so this is just where all the polling routines
* get called from.
*
* Author: Mitch Lichtenberg (mpl@broadcom.com)
*
*********************************************************************
*
* Copyright 2000,2001,2002,2003
* Broadcom Corporation. All rights reserved.
*
* This software is furnished under license and may be used and
* copied only in accordance with the following terms and
* conditions. Subject to these conditions, you may download,
* copy, install, use, modify and distribute modified or unmodified
* copies of this software in source and/or binary form. No title
* or ownership is transferred hereby.
*
* 1) Any source code used, modified or distributed must reproduce
* and retain this copyright notice and list of conditions
* as they appear in the source file.
*
* 2) No right is granted to use any trade name, trademark, or
* logo of Broadcom Corporation. The "Broadcom Corporation"
* name may not be used to endorse or promote products derived
* from this software without the prior written permission of
* Broadcom Corporation.
*
* 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED
* WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT
* SHALL BROADCOM BE LIABLE FOR ANY DAMAGES WHATSOEVER, AND IN
* PARTICULAR, BROADCOM SHALL NOT BE LIABLE FOR DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE), EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
********************************************************************* */
#include "lib_types.h"
#include "lib_string.h"
#include "lib_printf.h"
#include "cfe_timer.h"
/* *********************************************************************
* Constants
********************************************************************* */
#define MAX_BACKGROUND_TASKS 16
/* *********************************************************************
* Globals
********************************************************************* */
static void (*cfe_bg_tasklist[MAX_BACKGROUND_TASKS])(void *);
static void *cfe_bg_args[MAX_BACKGROUND_TASKS];
/* *********************************************************************
* cfe_bg_init()
*
* Initialize the background task list
*
* Input parameters:
* nothing
*
* Return value:
* nothing
********************************************************************* */
void cfe_bg_init(void)
{
memset(cfe_bg_tasklist,0,sizeof(cfe_bg_tasklist));
}
/* *********************************************************************
* cfe_bg_add(func,arg)
*
* Add a function to be called periodically in the background
* polling loop.
*
* Input parameters:
* func - function pointer
* arg - arg to pass to function
*
* Return value:
* nothing
********************************************************************* */
void cfe_bg_add(void (*func)(void *x),void *arg)
{
int idx;
for (idx = 0; idx < MAX_BACKGROUND_TASKS; idx++) {
if (cfe_bg_tasklist[idx] == NULL) {
cfe_bg_tasklist[idx] = func;
cfe_bg_args[idx] = arg;
return;
}
}
}
/* *********************************************************************
* cfe_bg_remove(func)
*
* Remove a function from the background polling loop
*
* Input parameters:
* func - function pointer
*
* Return value:
* nothing
********************************************************************* */
void cfe_bg_remove(void (*func)(void *))
{
int idx;
for (idx = 0; idx < MAX_BACKGROUND_TASKS; idx++) {
if (cfe_bg_tasklist[idx] == func) break;
}
if (idx == MAX_BACKGROUND_TASKS) return;
for (; idx < MAX_BACKGROUND_TASKS-1; idx++) {
cfe_bg_tasklist[idx] = cfe_bg_tasklist[idx+1];
cfe_bg_args[idx] = cfe_bg_args[idx+1];
}
cfe_bg_tasklist[idx] = NULL;
cfe_bg_args[idx] = NULL;
}
/* *********************************************************************
* background()
*
* The main loop and other places that wait for stuff call
* this routine to make sure the background handlers get their
* time.
*
* Input parameters:
* nothing
*
* Return value:
* nothing
********************************************************************* */
void background(void)
{
int idx;
void (*func)(void *arg);
for (idx = 0; idx < MAX_BACKGROUND_TASKS; idx++) {
func = cfe_bg_tasklist[idx];
if (func == NULL) break;
(*func)(cfe_bg_args[idx]);
}
}
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