191 lines
6.3 KiB
C
191 lines
6.3 KiB
C
/*----------------------------------------------------------------------------
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* RL-ARM - RTX
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*----------------------------------------------------------------------------
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* Name: RT_EVENT.C
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* Purpose: Implements waits and wake-ups for event flags
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* Rev.: V4.70
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*----------------------------------------------------------------------------
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*
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* Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
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* All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* - Neither the name of ARM nor the names of its contributors may be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*---------------------------------------------------------------------------*/
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#include "rt_TypeDef.h"
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#include "RTX_Config.h"
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#include "rt_System.h"
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#include "rt_Event.h"
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#include "rt_List.h"
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#include "rt_Task.h"
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#include "rt_HAL_CM.h"
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/*----------------------------------------------------------------------------
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* Functions
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*---------------------------------------------------------------------------*/
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/*--------------------------- rt_evt_wait -----------------------------------*/
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OS_RESULT rt_evt_wait (U16 wait_flags, U16 timeout, BOOL and_wait) {
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/* Wait for one or more event flags with optional time-out. */
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/* "wait_flags" identifies the flags to wait for. */
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/* "timeout" is the time-out limit in system ticks (0xffff if no time-out) */
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/* "and_wait" specifies the AND-ing of "wait_flags" as condition to be met */
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/* to complete the wait. (OR-ing if set to 0). */
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U32 block_state;
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if (and_wait) {
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/* Check for AND-connected events */
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if ((os_tsk.run->events & wait_flags) == wait_flags) {
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os_tsk.run->events &= ~wait_flags;
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return (OS_R_EVT);
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}
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block_state = WAIT_AND;
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}
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else {
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/* Check for OR-connected events */
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if (os_tsk.run->events & wait_flags) {
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os_tsk.run->waits = os_tsk.run->events & wait_flags;
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os_tsk.run->events &= ~wait_flags;
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return (OS_R_EVT);
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}
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block_state = WAIT_OR;
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}
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/* Task has to wait */
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os_tsk.run->waits = wait_flags;
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rt_block (timeout, (U8)block_state);
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return (OS_R_TMO);
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}
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/*--------------------------- rt_evt_set ------------------------------------*/
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void rt_evt_set (U16 event_flags, OS_TID task_id) {
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/* Set one or more event flags of a selectable task. */
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P_TCB p_tcb;
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p_tcb = os_active_TCB[task_id-1];
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if (p_tcb == NULL) {
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return;
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}
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p_tcb->events |= event_flags;
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event_flags = p_tcb->waits;
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/* If the task is not waiting for an event, it should not be put */
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/* to ready state. */
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if (p_tcb->state == WAIT_AND) {
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/* Check for AND-connected events */
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if ((p_tcb->events & event_flags) == event_flags) {
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goto wkup;
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}
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}
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if (p_tcb->state == WAIT_OR) {
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/* Check for OR-connected events */
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if (p_tcb->events & event_flags) {
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p_tcb->waits &= p_tcb->events;
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wkup: p_tcb->events &= ~event_flags;
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rt_rmv_dly (p_tcb);
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p_tcb->state = READY;
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#ifdef __CMSIS_RTOS
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rt_ret_val2(p_tcb, 0x08/*osEventSignal*/, p_tcb->waits);
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#else
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rt_ret_val (p_tcb, OS_R_EVT);
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#endif
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rt_dispatch (p_tcb);
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}
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}
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}
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/*--------------------------- rt_evt_clr ------------------------------------*/
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void rt_evt_clr (U16 clear_flags, OS_TID task_id) {
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/* Clear one or more event flags (identified by "clear_flags") of a */
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/* selectable task (identified by "task"). */
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P_TCB task = os_active_TCB[task_id-1];
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if (task == NULL) {
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return;
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}
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task->events &= ~clear_flags;
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}
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/*--------------------------- isr_evt_set -----------------------------------*/
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void isr_evt_set (U16 event_flags, OS_TID task_id) {
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/* Same function as "os_evt_set", but to be called by ISRs. */
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P_TCB p_tcb = os_active_TCB[task_id-1];
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if (p_tcb == NULL) {
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return;
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}
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rt_psq_enq (p_tcb, event_flags);
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rt_psh_req ();
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}
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/*--------------------------- rt_evt_get ------------------------------------*/
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U16 rt_evt_get (void) {
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/* Get events of a running task after waiting for OR connected events. */
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return (os_tsk.run->waits);
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}
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/*--------------------------- rt_evt_psh ------------------------------------*/
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void rt_evt_psh (P_TCB p_CB, U16 set_flags) {
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/* Check if task has to be waken up */
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U16 event_flags;
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p_CB->events |= set_flags;
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event_flags = p_CB->waits;
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if (p_CB->state == WAIT_AND) {
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/* Check for AND-connected events */
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if ((p_CB->events & event_flags) == event_flags) {
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goto rdy;
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}
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}
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if (p_CB->state == WAIT_OR) {
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/* Check for OR-connected events */
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if (p_CB->events & event_flags) {
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p_CB->waits &= p_CB->events;
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rdy: p_CB->events &= ~event_flags;
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rt_rmv_dly (p_CB);
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p_CB->state = READY;
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#ifdef __CMSIS_RTOS
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rt_ret_val2(p_CB, 0x08/*osEventSignal*/, p_CB->waits);
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#else
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rt_ret_val (p_CB, OS_R_EVT);
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#endif
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rt_put_prio (&os_rdy, p_CB);
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}
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}
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}
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/*----------------------------------------------------------------------------
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* end of file
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*---------------------------------------------------------------------------*/
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