skeleton for lab1
Dependencies: AvailableMemory mbed-rtos mbed
Fork of helloaabbc by
mbed-rtos/rtx/rt_Robin.c
- Committer:
- y7jin
- Date:
- 2014-04-03
- Revision:
- 0:1c8f2727e9f5
File content as of revision 0:1c8f2727e9f5:
/*---------------------------------------------------------------------------- * RL-ARM - RTX *---------------------------------------------------------------------------- * Name: RT_ROBIN.C * Purpose: Round Robin Task switching * Rev.: V4.60 *---------------------------------------------------------------------------- * * Copyright (c) 1999-2009 KEIL, 2009-2012 ARM Germany GmbH * All rights reserved. * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * - Neither the name of ARM nor the names of its contributors may be used * to endorse or promote products derived from this software without * specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE * LIABLE FOR ANY 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) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. *---------------------------------------------------------------------------*/ #include "rt_TypeDef.h" #include "RTX_Config.h" #include "rt_List.h" #include "rt_Task.h" #include "rt_Time.h" #include "rt_Robin.h" #include "rt_HAL_CM.h" /*---------------------------------------------------------------------------- * Global Variables *---------------------------------------------------------------------------*/ struct OS_ROBIN os_robin; /*---------------------------------------------------------------------------- * Global Functions *---------------------------------------------------------------------------*/ /*--------------------------- rt_init_robin ---------------------------------*/ __weak void rt_init_robin (void) { /* Initialize Round Robin variables. */ os_robin.task = NULL; os_robin.tout = (U16)os_rrobin; } /*--------------------------- rt_chk_robin ----------------------------------*/ __weak void rt_chk_robin (void) { /* Check if Round Robin timeout expired and switch to the next ready task.*/ P_TCB p_new; if (os_robin.task != os_rdy.p_lnk) { /* New task was suspended, reset Round Robin timeout. */ os_robin.task = os_rdy.p_lnk; os_robin.time = (U16)os_time + os_robin.tout - 1; } if (os_robin.time == (U16)os_time) { /* Round Robin timeout has expired, swap Robin tasks. */ os_robin.task = NULL; p_new = rt_get_first (&os_rdy); rt_put_prio ((P_XCB)&os_rdy, p_new); } } /*---------------------------------------------------------------------------- * end of file *---------------------------------------------------------------------------*/