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- /*----------------------------------------------------------------------------
- * RL-ARM - RTX
- *----------------------------------------------------------------------------
- * Name: RT_LIST.C
- * Purpose: Functions for the management of different lists
- * 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_System.h"
- #include "rt_List.h"
- #include "rt_Task.h"
- #include "rt_Time.h"
- #ifdef __CORTEX_A9
- #include "rt_HAL_CA.h"
- #else
- #include "rt_HAL_CM.h"
- #endif
-
- /*----------------------------------------------------------------------------
- * Global Variables
- *---------------------------------------------------------------------------*/
-
- /* List head of chained ready tasks */
- struct OS_XCB os_rdy;
- /* List head of chained delay tasks */
- struct OS_XCB os_dly;
-
-
- /*----------------------------------------------------------------------------
- * Functions
- *---------------------------------------------------------------------------*/
-
-
- /*--------------------------- rt_put_prio -----------------------------------*/
-
- void rt_put_prio (P_XCB p_CB, P_TCB p_task) {
- /* Put task identified with "p_task" into list ordered by priority. */
- /* "p_CB" points to head of list; list has always an element at end with */
- /* a priority less than "p_task->prio". */
- P_TCB p_CB2;
- U32 prio;
- BOOL sem_mbx = __FALSE;
-
- if (p_CB->cb_type == SCB || p_CB->cb_type == MCB || p_CB->cb_type == MUCB) {
- sem_mbx = __TRUE;
- }
- prio = p_task->prio;
- p_CB2 = p_CB->p_lnk;
- /* Search for an entry in the list */
- while (p_CB2 != NULL && prio <= p_CB2->prio) {
- p_CB = (P_XCB)p_CB2;
- p_CB2 = p_CB2->p_lnk;
- }
- /* Entry found, insert the task into the list */
- p_task->p_lnk = p_CB2;
- p_CB->p_lnk = p_task;
- if (sem_mbx) {
- if (p_CB2 != NULL) {
- p_CB2->p_rlnk = p_task;
- }
- p_task->p_rlnk = (P_TCB)p_CB;
- }
- else {
- p_task->p_rlnk = NULL;
- }
- }
-
-
- /*--------------------------- rt_get_first ----------------------------------*/
-
- P_TCB rt_get_first (P_XCB p_CB) {
- /* Get task at head of list: it is the task with highest priority. */
- /* "p_CB" points to head of list. */
- P_TCB p_first;
-
- p_first = p_CB->p_lnk;
- p_CB->p_lnk = p_first->p_lnk;
- if (p_CB->cb_type == SCB || p_CB->cb_type == MCB || p_CB->cb_type == MUCB) {
- if (p_first->p_lnk != NULL) {
- p_first->p_lnk->p_rlnk = (P_TCB)p_CB;
- p_first->p_lnk = NULL;
- }
- p_first->p_rlnk = NULL;
- }
- else {
- p_first->p_lnk = NULL;
- }
- return (p_first);
- }
-
-
- /*--------------------------- rt_put_rdy_first ------------------------------*/
-
- void rt_put_rdy_first (P_TCB p_task) {
- /* Put task identified with "p_task" at the head of the ready list. The */
- /* task must have at least a priority equal to highest priority in list. */
- p_task->p_lnk = os_rdy.p_lnk;
- p_task->p_rlnk = NULL;
- os_rdy.p_lnk = p_task;
- }
-
-
- /*--------------------------- rt_get_same_rdy_prio --------------------------*/
-
- P_TCB rt_get_same_rdy_prio (void) {
- /* Remove a task of same priority from ready list if any exists. Other- */
- /* wise return NULL. */
- P_TCB p_first;
-
- p_first = os_rdy.p_lnk;
- if (p_first->prio == os_tsk.run->prio) {
- os_rdy.p_lnk = os_rdy.p_lnk->p_lnk;
- return (p_first);
- }
- return (NULL);
- }
-
-
- /*--------------------------- rt_resort_prio --------------------------------*/
-
- void rt_resort_prio (P_TCB p_task) {
- /* Re-sort ordered lists after the priority of 'p_task' has changed. */
- P_TCB p_CB;
-
- if (p_task->p_rlnk == NULL) {
- if (p_task->state == READY) {
- /* Task is chained into READY list. */
- p_CB = (P_TCB)&os_rdy;
- goto res;
- }
- }
- else {
- p_CB = p_task->p_rlnk;
- while (p_CB->cb_type == TCB) {
- /* Find a header of this task chain list. */
- p_CB = p_CB->p_rlnk;
- }
- res:rt_rmv_list (p_task);
- rt_put_prio ((P_XCB)p_CB, p_task);
- }
- }
-
-
- /*--------------------------- rt_put_dly ------------------------------------*/
-
- void rt_put_dly (P_TCB p_task, U16 delay) {
- /* Put a task identified with "p_task" into chained delay wait list using */
- /* a delay value of "delay". */
- P_TCB p;
- U32 delta,idelay = delay;
-
- p = (P_TCB)&os_dly;
- if (p->p_dlnk == NULL) {
- /* Delay list empty */
- delta = 0;
- goto last;
- }
- delta = os_dly.delta_time;
- while (delta < idelay) {
- if (p->p_dlnk == NULL) {
- /* End of list found */
- last: p_task->p_dlnk = NULL;
- p->p_dlnk = p_task;
- p_task->p_blnk = p;
- p->delta_time = (U16)(idelay - delta);
- p_task->delta_time = 0;
- return;
- }
- p = p->p_dlnk;
- delta += p->delta_time;
- }
- /* Right place found */
- p_task->p_dlnk = p->p_dlnk;
- p->p_dlnk = p_task;
- p_task->p_blnk = p;
- if (p_task->p_dlnk != NULL) {
- p_task->p_dlnk->p_blnk = p_task;
- }
- p_task->delta_time = (U16)(delta - idelay);
- p->delta_time -= p_task->delta_time;
- }
-
-
- /*--------------------------- rt_dec_dly ------------------------------------*/
-
- void rt_dec_dly (void) {
- /* Decrement delta time of list head: remove tasks having a value of zero.*/
- P_TCB p_rdy;
-
- if (os_dly.p_dlnk == NULL) {
- return;
- }
- os_dly.delta_time--;
- while ((os_dly.delta_time == 0) && (os_dly.p_dlnk != NULL)) {
- p_rdy = os_dly.p_dlnk;
- if (p_rdy->p_rlnk != NULL) {
- /* Task is really enqueued, remove task from semaphore/mailbox */
- /* timeout waiting list. */
- p_rdy->p_rlnk->p_lnk = p_rdy->p_lnk;
- if (p_rdy->p_lnk != NULL) {
- p_rdy->p_lnk->p_rlnk = p_rdy->p_rlnk;
- p_rdy->p_lnk = NULL;
- }
- p_rdy->p_rlnk = NULL;
- }
- rt_put_prio (&os_rdy, p_rdy);
- os_dly.delta_time = p_rdy->delta_time;
- if (p_rdy->state == WAIT_ITV) {
- /* Calculate the next time for interval wait. */
- p_rdy->delta_time = p_rdy->interval_time + (U16)os_time;
- }
- p_rdy->state = READY;
- os_dly.p_dlnk = p_rdy->p_dlnk;
- if (p_rdy->p_dlnk != NULL) {
- p_rdy->p_dlnk->p_blnk = (P_TCB)&os_dly;
- p_rdy->p_dlnk = NULL;
- }
- p_rdy->p_blnk = NULL;
- }
- }
-
-
- /*--------------------------- rt_rmv_list -----------------------------------*/
-
- void rt_rmv_list (P_TCB p_task) {
- /* Remove task identified with "p_task" from ready, semaphore or mailbox */
- /* waiting list if enqueued. */
- P_TCB p_b;
-
- if (p_task->p_rlnk != NULL) {
- /* A task is enqueued in semaphore / mailbox waiting list. */
- p_task->p_rlnk->p_lnk = p_task->p_lnk;
- if (p_task->p_lnk != NULL) {
- p_task->p_lnk->p_rlnk = p_task->p_rlnk;
- }
- return;
- }
-
- p_b = (P_TCB)&os_rdy;
- while (p_b != NULL) {
- /* Search the ready list for task "p_task" */
- if (p_b->p_lnk == p_task) {
- p_b->p_lnk = p_task->p_lnk;
- return;
- }
- p_b = p_b->p_lnk;
- }
- }
-
-
- /*--------------------------- rt_rmv_dly ------------------------------------*/
-
- void rt_rmv_dly (P_TCB p_task) {
- /* Remove task identified with "p_task" from delay list if enqueued. */
- P_TCB p_b;
-
- p_b = p_task->p_blnk;
- if (p_b != NULL) {
- /* Task is really enqueued */
- p_b->p_dlnk = p_task->p_dlnk;
- if (p_task->p_dlnk != NULL) {
- /* 'p_task' is in the middle of list */
- p_b->delta_time += p_task->delta_time;
- p_task->p_dlnk->p_blnk = p_b;
- p_task->p_dlnk = NULL;
- }
- else {
- /* 'p_task' is at the end of list */
- p_b->delta_time = 0;
- }
- p_task->p_blnk = NULL;
- }
- }
-
-
- /*--------------------------- rt_psq_enq ------------------------------------*/
-
- void rt_psq_enq (OS_ID entry, U32 arg) {
- /* Insert post service request "entry" into ps-queue. */
- U32 idx;
-
- idx = rt_inc_qi (os_psq->size, &os_psq->count, &os_psq->first);
- if (idx < os_psq->size) {
- os_psq->q[idx].id = entry;
- os_psq->q[idx].arg = arg;
- }
- else {
- os_error (OS_ERR_FIFO_OVF);
- }
- }
-
-
- /*----------------------------------------------------------------------------
- * end of file
- *---------------------------------------------------------------------------*/
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