190 lines
6.3 KiB
C
190 lines
6.3 KiB
C
/*----------------------------------------------------------------------------
|
|
* RL-ARM - RTX
|
|
*----------------------------------------------------------------------------
|
|
* Name: RT_EVENT.C
|
|
* Purpose: Implements waits and wake-ups for event flags
|
|
* 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_Conf.h"
|
|
#include "rt_System.h"
|
|
#include "rt_Event.h"
|
|
#include "rt_List.h"
|
|
#include "rt_Task.h"
|
|
#include "rt_HAL_CM.h"
|
|
|
|
|
|
/*----------------------------------------------------------------------------
|
|
* Functions
|
|
*---------------------------------------------------------------------------*/
|
|
|
|
|
|
/*--------------------------- rt_evt_wait -----------------------------------*/
|
|
|
|
OS_RESULT rt_evt_wait (U16 wait_flags, U16 timeout, BOOL and_wait) {
|
|
/* Wait for one or more event flags with optional time-out. */
|
|
/* "wait_flags" identifies the flags to wait for. */
|
|
/* "timeout" is the time-out limit in system ticks (0xffff if no time-out) */
|
|
/* "and_wait" specifies the AND-ing of "wait_flags" as condition to be met */
|
|
/* to complete the wait. (OR-ing if set to 0). */
|
|
U32 block_state;
|
|
|
|
if (and_wait) {
|
|
/* Check for AND-connected events */
|
|
if ((os_tsk.run->events & wait_flags) == wait_flags) {
|
|
os_tsk.run->events &= ~wait_flags;
|
|
return (OS_R_EVT);
|
|
}
|
|
block_state = WAIT_AND;
|
|
}
|
|
else {
|
|
/* Check for OR-connected events */
|
|
if (os_tsk.run->events & wait_flags) {
|
|
os_tsk.run->waits = os_tsk.run->events & wait_flags;
|
|
os_tsk.run->events &= ~wait_flags;
|
|
return (OS_R_EVT);
|
|
}
|
|
block_state = WAIT_OR;
|
|
}
|
|
/* Task has to wait */
|
|
os_tsk.run->waits = wait_flags;
|
|
rt_block (timeout, (U8)block_state);
|
|
return (OS_R_TMO);
|
|
}
|
|
|
|
|
|
/*--------------------------- rt_evt_set ------------------------------------*/
|
|
|
|
void rt_evt_set (U16 event_flags, OS_TID task_id) {
|
|
/* Set one or more event flags of a selectable task. */
|
|
P_TCB p_tcb;
|
|
|
|
p_tcb = os_active_TCB[task_id-1];
|
|
if (p_tcb == NULL) {
|
|
return;
|
|
}
|
|
p_tcb->events |= event_flags;
|
|
event_flags = p_tcb->waits;
|
|
/* If the task is not waiting for an event, it should not be put */
|
|
/* to ready state. */
|
|
if (p_tcb->state == WAIT_AND) {
|
|
/* Check for AND-connected events */
|
|
if ((p_tcb->events & event_flags) == event_flags) {
|
|
goto wkup;
|
|
}
|
|
}
|
|
if (p_tcb->state == WAIT_OR) {
|
|
/* Check for OR-connected events */
|
|
if (p_tcb->events & event_flags) {
|
|
p_tcb->waits &= p_tcb->events;
|
|
wkup: p_tcb->events &= ~event_flags;
|
|
rt_rmv_dly (p_tcb);
|
|
p_tcb->state = READY;
|
|
#ifdef __CMSIS_RTOS
|
|
rt_ret_val2(p_tcb, 0x08/*osEventSignal*/, p_tcb->waits);
|
|
#else
|
|
rt_ret_val (p_tcb, OS_R_EVT);
|
|
#endif
|
|
rt_dispatch (p_tcb);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*--------------------------- rt_evt_clr ------------------------------------*/
|
|
|
|
void rt_evt_clr (U16 clear_flags, OS_TID task_id) {
|
|
/* Clear one or more event flags (identified by "clear_flags") of a */
|
|
/* selectable task (identified by "task"). */
|
|
P_TCB task = os_active_TCB[task_id-1];
|
|
|
|
if (task == NULL) {
|
|
return;
|
|
}
|
|
task->events &= ~clear_flags;
|
|
}
|
|
|
|
|
|
/*--------------------------- isr_evt_set -----------------------------------*/
|
|
|
|
void isr_evt_set (U16 event_flags, OS_TID task_id) {
|
|
/* Same function as "os_evt_set", but to be called by ISRs. */
|
|
P_TCB p_tcb = os_active_TCB[task_id-1];
|
|
|
|
if (p_tcb == NULL) {
|
|
return;
|
|
}
|
|
rt_psq_enq (p_tcb, event_flags);
|
|
rt_psh_req ();
|
|
}
|
|
|
|
|
|
/*--------------------------- rt_evt_get ------------------------------------*/
|
|
|
|
U16 rt_evt_get (void) {
|
|
/* Get events of a running task after waiting for OR connected events. */
|
|
return (os_tsk.run->waits);
|
|
}
|
|
|
|
|
|
/*--------------------------- rt_evt_psh ------------------------------------*/
|
|
|
|
void rt_evt_psh (P_TCB p_CB, U16 set_flags) {
|
|
/* Check if task has to be waken up */
|
|
U16 event_flags;
|
|
|
|
p_CB->events |= set_flags;
|
|
event_flags = p_CB->waits;
|
|
if (p_CB->state == WAIT_AND) {
|
|
/* Check for AND-connected events */
|
|
if ((p_CB->events & event_flags) == event_flags) {
|
|
goto rdy;
|
|
}
|
|
}
|
|
if (p_CB->state == WAIT_OR) {
|
|
/* Check for OR-connected events */
|
|
if (p_CB->events & event_flags) {
|
|
p_CB->waits &= p_CB->events;
|
|
rdy: p_CB->events &= ~event_flags;
|
|
rt_rmv_dly (p_CB);
|
|
p_CB->state = READY;
|
|
#ifdef __CMSIS_RTOS
|
|
rt_ret_val2(p_CB, 0x08/*osEventSignal*/, p_CB->waits);
|
|
#else
|
|
rt_ret_val (p_CB, OS_R_EVT);
|
|
#endif
|
|
rt_put_prio (&os_rdy, p_CB);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*----------------------------------------------------------------------------
|
|
* end of file
|
|
*---------------------------------------------------------------------------*/
|