mirror of
https://github.com/FreeRTOS/FreeRTOS-Kernel.git
synced 2025-05-18 11:09:03 -04:00
636 lines
20 KiB
C
636 lines
20 KiB
C
/*
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* Copyright (c) 2001-2003 Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF 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) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* This file is part of the lwIP TCP/IP stack.
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*
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* Author: Adam Dunkels <adam@sics.se>
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*
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*/
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//*****************************************************************************
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//
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// Include OS functionality.
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//
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//*****************************************************************************
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/* ------------------------ System architecture includes ----------------------------- */
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#include "arch/sys_arch.h"
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/* ------------------------ lwIP includes --------------------------------- */
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#include "lwip/opt.h"
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#include "lwip/debug.h"
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#include "lwip/def.h"
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#include "lwip/sys.h"
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#include "lwip/mem.h"
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#include "lwip/stats.h"
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/*---------------------------------------------------------------------------*
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* Globals:
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*---------------------------------------------------------------------------*/
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#if 0
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_RB_
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struct timeoutlist
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{
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struct sys_timeouts timeouts;
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xTaskHandle pid;
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};
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/* This is the number of threads that can be started with sys_thread_new() */
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#define SYS_THREAD_MAX 4
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static u16_t s_nextthread = 0;
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static struct timeoutlist s_timeoutlist[SYS_THREAD_MAX];
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#endif
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/*-----------------------------------------------------------------------------------*/
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/*---------------------------------------------------------------------------*
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* Routine: sys_mbox_new
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*---------------------------------------------------------------------------*
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* Description:
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* Creates a new mailbox
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* Inputs:
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* int size -- Size of elements in the mailbox
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* Outputs:
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* sys_mbox_t -- Handle to new mailbox
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*---------------------------------------------------------------------------*/
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err_t sys_mbox_new(sys_mbox_t *mbox, int size)
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{
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err_t lwip_err= ERR_MEM;
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*mbox = xQueueCreate( size, sizeof( void * ) );
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// Created succesfully?
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if(*mbox != NULL)
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{
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lwip_err = ERR_OK;
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#if SYS_STATS
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SYS_STATS_INC(mbox.used);
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#endif /* SYS_STATS */
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}
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return lwip_err;
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}
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/*---------------------------------------------------------------------------*
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* Routine: sys_mbox_free
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*---------------------------------------------------------------------------*
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* Description:
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* Deallocates a mailbox. If there are messages still present in the
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* mailbox when the mailbox is deallocated, it is an indication of a
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* programming error in lwIP and the developer should be notified.
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* Inputs:
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* sys_mbox_t mbox -- Handle of mailbox
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* Outputs:
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* sys_mbox_t -- Handle to new mailbox
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*---------------------------------------------------------------------------*/
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void sys_mbox_free(sys_mbox_t *mbox)
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{
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unsigned portBASE_TYPE uxMessagesWaiting;
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uxMessagesWaiting = uxQueueMessagesWaiting( *mbox );
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configASSERT( ( uxMessagesWaiting == 0 ) );
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#if SYS_STATS
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if (uxMessagesWaiting != 0U)
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{
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SYS_STATS_INC(mbox.err);
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}
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SYS_STATS_DEC(mbox.used);
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#endif /* SYS_STATS */
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vQueueDelete( *mbox );
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}
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/*---------------------------------------------------------------------------*
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* Routine: sys_mbox_post
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*---------------------------------------------------------------------------*
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* Description:
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* Post the "msg" to the mailbox.
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* Inputs:
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* sys_mbox_t mbox -- Handle of mailbox
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* void *data -- Pointer to data to post
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*---------------------------------------------------------------------------*/
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void sys_mbox_post(sys_mbox_t *mbox, void *msg)
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{
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while( xQueueSendToBack( *mbox, &msg, portMAX_DELAY ) != pdTRUE );
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}
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/*---------------------------------------------------------------------------*
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* Routine: sys_mbox_trypost
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*---------------------------------------------------------------------------*
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* Description:
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* Try to post the "msg" to the mailbox. Returns immediately with
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* error if cannot.
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* Inputs:
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* sys_mbox_t mbox -- Handle of mailbox
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* void *msg -- Pointer to data to post
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* Outputs:
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* err_t -- ERR_OK if message posted, else ERR_MEM
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* if not.
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*---------------------------------------------------------------------------*/
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err_t sys_mbox_trypost(sys_mbox_t *mbox, void *msg)
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{
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err_t result;
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if ( xQueueSend( *mbox, &msg, 0 ) == pdPASS )
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{
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result = ERR_OK;
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}
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else
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{
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// could not post, queue must be full
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result = ERR_MEM;
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#if SYS_STATS
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SYS_STATS_INC(mbox.err);
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#endif /* SYS_STATS */
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}
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return result;
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}
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/*---------------------------------------------------------------------------*
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* Routine: sys_arch_mbox_fetch
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*---------------------------------------------------------------------------*
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* Description:
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* Blocks the thread until a message arrives in the mailbox, but does
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* not block the thread longer than "timeout" milliseconds (similar to
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* the sys_arch_sem_wait() function). The "msg" argument is a result
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* parameter that is set by the function (i.e., by doing "*msg =
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* ptr"). The "msg" parameter maybe NULL to indicate that the message
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* should be dropped.
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*
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* The return values are the same as for the sys_arch_sem_wait() function:
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* Number of milliseconds spent waiting or SYS_ARCH_TIMEOUT if there was a
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* timeout.
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*
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* Note that a function with a similar name, sys_mbox_fetch(), is
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* implemented by lwIP.
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* Inputs:
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* sys_mbox_t mbox -- Handle of mailbox
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* void **msg -- Pointer to pointer to msg received
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* u32_t timeout -- Number of milliseconds until timeout
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* Outputs:
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* u32_t -- SYS_ARCH_TIMEOUT if timeout, else number
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* of milliseconds until received.
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*---------------------------------------------------------------------------*/
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u32_t sys_arch_mbox_fetch(sys_mbox_t *mbox, void **msg, u32_t timeout)
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{
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void *dummyptr;
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portTickType StartTime, EndTime, Elapsed;
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StartTime = xTaskGetTickCount();
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if (NULL == msg)
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{
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msg = &dummyptr;
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}
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if (timeout != 0)
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{
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if ( pdTRUE == xQueueReceive( *mbox, &(*msg), timeout / portTICK_RATE_MS ) )
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{
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EndTime = xTaskGetTickCount();
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Elapsed = (EndTime - StartTime) * portTICK_RATE_MS;
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return ( Elapsed );
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}
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else // timed out blocking for message
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{
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*msg = NULL;
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return SYS_ARCH_TIMEOUT;
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}
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}
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else
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{
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while( pdTRUE != xQueueReceive( mbox, &(*msg), portMAX_DELAY ) ); // time is arbitrary
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EndTime = xTaskGetTickCount();
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Elapsed = (EndTime - StartTime) * portTICK_RATE_MS;
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if (Elapsed == 0)
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{
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Elapsed = 1;
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}
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// return time blocked TBD test
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return (Elapsed);
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}
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}
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/*---------------------------------------------------------------------------*
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* Routine: sys_arch_mbox_tryfetch
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*---------------------------------------------------------------------------*
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* Description:
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* Similar to sys_arch_mbox_fetch, but if message is not ready
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* immediately, we'll return with SYS_MBOX_EMPTY. On success, 0 is
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* returned.
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* Inputs:
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* sys_mbox_t mbox -- Handle of mailbox
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* void **msg -- Pointer to pointer to msg received
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* Outputs:
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* u32_t -- SYS_MBOX_EMPTY if no messages. Otherwise,
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* return ERR_OK.
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*---------------------------------------------------------------------------*/
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u32_t sys_arch_mbox_tryfetch(sys_mbox_t *mbox, void **msg)
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{
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void *dummyptr;
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if (msg == NULL)
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{
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msg = &dummyptr;
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}
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if ( pdTRUE == xQueueReceive( *mbox, &(*msg), 0 ) )
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{
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return ERR_OK;
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}
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else
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{
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return SYS_MBOX_EMPTY;
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}
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}
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/*---------------------------------------------------------------------------*
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* Routine: sys_sem_new
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*---------------------------------------------------------------------------*
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* Description:
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* Creates and returns a new semaphore. The "count" argument specifies
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* the initial state of the semaphore.
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* NOTE: Currently this routine only creates counts of 1 or 0
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* Inputs:
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* sys_mbox_t mbox -- Handle of mailbox
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* u8_t count -- Initial count of semaphore (1 or 0)
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* Outputs:
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* sys_sem_t -- Created semaphore or 0 if could not create.
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*---------------------------------------------------------------------------*/
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err_t sys_sem_new(sys_sem_t *sem, u8_t count)
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{
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err_t lwip_err = ERR_MEM;
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vSemaphoreCreateBinary( (*sem) );
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if( *sem != NULL )
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{
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// Means it can't be taken
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if (count == 0)
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{
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xSemaphoreTake(*sem, 1);
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}
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lwip_err = ERR_OK;
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#if SYS_STATS
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SYS_STATS_INC(sem.used);
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#endif
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}
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else
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{
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#if SYS_STATS
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SYS_STATS_INC(sem.err);
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#endif
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}
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return lwip_err;
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}
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/*---------------------------------------------------------------------------*
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* Routine: sys_arch_sem_wait
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*---------------------------------------------------------------------------*
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* Description:
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* Blocks the thread while waiting for the semaphore to be
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* signaled. If the "timeout" argument is non-zero, the thread should
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* only be blocked for the specified time (measured in
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* milliseconds).
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*
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* If the timeout argument is non-zero, the return value is the number of
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* milliseconds spent waiting for the semaphore to be signaled. If the
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* semaphore wasn't signaled within the specified time, the return value is
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* SYS_ARCH_TIMEOUT. If the thread didn't have to wait for the semaphore
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* (i.e., it was already signaled), the function may return zero.
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*
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* Notice that lwIP implements a function with a similar name,
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* sys_sem_wait(), that uses the sys_arch_sem_wait() function.
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* Inputs:
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* sys_sem_t sem -- Semaphore to wait on
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* u32_t timeout -- Number of milliseconds until timeout
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* Outputs:
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* u32_t -- Time elapsed or SYS_ARCH_TIMEOUT.
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*---------------------------------------------------------------------------*/
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u32_t sys_arch_sem_wait(sys_sem_t *sem, u32_t timeout)
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{
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portTickType StartTime, EndTime, Elapsed;
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StartTime = xTaskGetTickCount();
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if (timeout != 0)
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{
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if( xSemaphoreTake( *sem, timeout / portTICK_RATE_MS ) == pdTRUE )
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{
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EndTime = xTaskGetTickCount();
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Elapsed = (EndTime - StartTime) * portTICK_RATE_MS;
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return (Elapsed); // return time blocked TODO test
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}
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else
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{
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return SYS_ARCH_TIMEOUT;
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}
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}
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else
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{
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while( xSemaphoreTake( sem, portMAX_DELAY ) != pdTRUE );
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EndTime = xTaskGetTickCount();
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Elapsed = (EndTime - StartTime) * portTICK_RATE_MS;
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if (Elapsed == 0)
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{
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Elapsed = 1;
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}
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// return time blocked
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return (Elapsed);
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}
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}
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/** Create a new mutex
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* @param mutex pointer to the mutex to create
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* @return a new mutex */
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err_t sys_mutex_new(sys_mutex_t *mutex)
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{
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err_t lwip_err = ERR_MEM;
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*mutex = xQueueCreateMutex();
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if( *mutex != NULL )
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{
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lwip_err = ERR_OK;
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#if SYS_STATS
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SYS_STATS_INC(mutex.used);
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#endif
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}
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else
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{
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#if SYS_STATS
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SYS_STATS_INC(mutex.err);
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#endif
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}
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return lwip_err;
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}
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/** Lock a mutex
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* @param mutex the mutex to lock */
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void sys_mutex_lock(sys_mutex_t *mutex)
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{
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while( xSemaphoreTake( *mutex, portMAX_DELAY ) != pdPASS );
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}
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/** Unlock a mutex
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* @param mutex the mutex to unlock */
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void sys_mutex_unlock(sys_mutex_t *mutex)
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{
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xSemaphoreGive(*mutex);
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}
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/** Delete a semaphore
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* @param mutex the mutex to delete */
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void sys_mutex_free(sys_mutex_t *mutex)
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{
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#if SYS_STATS
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SYS_STATS_DEC(mutex.used);
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#endif /* SYS_STATS */
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vQueueDelete(*mutex);
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}
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/*---------------------------------------------------------------------------*
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* Routine: sys_sem_signal
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*---------------------------------------------------------------------------*
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* Description:
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* Signals (releases) a semaphore
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* Inputs:
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* sys_sem_t sem -- Semaphore to signal
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*---------------------------------------------------------------------------*/
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void sys_sem_signal(sys_sem_t * sem)
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{
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//LWIP_ASSERT( "sys_sem_signal: sem != SYS_SEM_NULL", sem != SYS_SEM_NULL );
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xSemaphoreGive(*sem);
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}
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/*---------------------------------------------------------------------------*
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* Routine: sys_sem_free
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*---------------------------------------------------------------------------*
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* Description:
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* Deallocates a semaphore
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* Inputs:
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* sys_sem_t sem -- Semaphore to free
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*---------------------------------------------------------------------------*/
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void sys_sem_free(sys_sem_t * sem)
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{
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//LWIP_ASSERT( "sys_sem_free: sem != SYS_SEM_NULL", sem != SYS_SEM_NULL );
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#if SYS_STATS
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SYS_STATS_DEC(sem.used);
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#endif /* SYS_STATS */
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vQueueDelete(*sem);
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}
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/*---------------------------------------------------------------------------*
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* Routine: sys_init
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*---------------------------------------------------------------------------*
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* Description:
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* Initialize sys arch
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*---------------------------------------------------------------------------*/
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void sys_init(void)
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{
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#if 0
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int i;
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// Initialize the the per-thread sys_timeouts structures
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// make sure there are no valid pids in the list
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for (i = 0; i < SYS_THREAD_MAX; i++)
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{
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s_timeoutlist[i].pid = SYS_THREAD_NULL;
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// s_timeoutlist[i].timeouts.next = NULL;
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}
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// keep track of how many threads have been created
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s_nextthread = 0;
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#endif
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}
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u32_t sys_now(void)
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{
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return xTaskGetTickCount();
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}
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#if 0
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_RB_
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u32_t sys_jiffies(void)
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{
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return UEZTickCounterGet();
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}
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#endif
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/*---------------------------------------------------------------------------*
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* Routine: sys_arch_timeouts
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*---------------------------------------------------------------------------*
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* Description:
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* Returns a pointer to the per-thread sys_timeouts structure. In lwIP,
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* each thread has a list of timeouts which is represented as a linked
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* list of sys_timeout structures. The sys_timeouts structure holds a
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* pointer to a linked list of timeouts. This function is called by
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* the lwIP timeout scheduler and must not return a NULL value.
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*
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* In a single threaded sys_arch implementation, this function will
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* simply return a pointer to a global sys_timeouts variable stored in
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* the sys_arch module.
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* Outputs:
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* sys_timeouts * -- Pointer to per-thread timeouts.
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*---------------------------------------------------------------------------*/
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#if 0
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struct sys_timeouts *sys_arch_timeouts(void)
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{
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int i;
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T_uezTask pid;
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struct timeoutlist *tl;
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pid = UEZTaskGetCurrent();
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for (i = 0; i < s_nextthread; i++)
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{
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tl = &(s_timeoutlist[i]);
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if (tl->pid == pid)
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{
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// return &(tl->timeouts);
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}
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}
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// Error
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return NULL;
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}
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#endif
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/*---------------------------------------------------------------------------*
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* Routine: sys_thread_new
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*---------------------------------------------------------------------------*
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* Description:
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* Starts a new thread with priority "prio" that will begin its
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* execution in the function "thread()". The "arg" argument will be
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* passed as an argument to the thread() function. The id of the new
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* thread is returned. Both the id and the priority are system
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* dependent.
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* Inputs:
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* char *name -- Name of thread
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* void (* thread)(void *arg) -- Pointer to function to run.
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* void *arg -- Argument passed into function
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* int stacksize -- Required stack amount in bytes
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* int prio -- Thread priority
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* Outputs:
|
|
* sys_thread_t -- Pointer to per-thread timeouts.
|
|
*---------------------------------------------------------------------------*/
|
|
sys_thread_t sys_thread_new(const char *name, void(* thread)(void *arg), void *arg, int stacksize, int prio)
|
|
{
|
|
xTaskHandle CreatedTask;
|
|
int result;
|
|
|
|
result = xTaskCreate( thread, ( signed portCHAR * ) name, stacksize, arg, prio, &CreatedTask );
|
|
|
|
if(result == pdPASS)
|
|
{
|
|
return CreatedTask;
|
|
}
|
|
else
|
|
{
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* Routine: sys_arch_protect
|
|
*---------------------------------------------------------------------------*
|
|
* Description:
|
|
* This optional function does a "fast" critical region protection and
|
|
* returns the previous protection level. This function is only called
|
|
* during very short critical regions. An embedded system which supports
|
|
* ISR-based drivers might want to implement this function by disabling
|
|
* interrupts. Task-based systems might want to implement this by using
|
|
* a mutex or disabling tasking. This function should support recursive
|
|
* calls from the same task or interrupt. In other words,
|
|
* sys_arch_protect() could be called while already protected. In
|
|
* that case the return value indicates that it is already protected.
|
|
*
|
|
* sys_arch_protect() is only required if your port is supporting an
|
|
* operating system.
|
|
* Outputs:
|
|
* sys_prot_t -- Previous protection level (not used here)
|
|
*---------------------------------------------------------------------------*/
|
|
sys_prot_t sys_arch_protect(void)
|
|
{
|
|
vPortEnterCritical();
|
|
return 1;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* Routine: sys_arch_unprotect
|
|
*---------------------------------------------------------------------------*
|
|
* Description:
|
|
* This optional function does a "fast" set of critical region
|
|
* protection to the value specified by pval. See the documentation for
|
|
* sys_arch_protect() for more information. This function is only
|
|
* required if your port is supporting an operating system.
|
|
* Inputs:
|
|
* sys_prot_t -- Previous protection level (not used here)
|
|
*---------------------------------------------------------------------------*/
|
|
void sys_arch_unprotect(sys_prot_t pval)
|
|
{
|
|
(void) pval;
|
|
taskEXIT_CRITICAL();
|
|
}
|
|
|
|
/*
|
|
* Prints an assertion messages and aborts execution.
|
|
*/
|
|
void sys_assert(const char *msg)
|
|
{
|
|
(void) msg;
|
|
|
|
for (;;)
|
|
{
|
|
}
|
|
}
|
|
/*-------------------------------------------------------------------------*
|
|
* End of File: sys_arch.c
|
|
*-------------------------------------------------------------------------*/
|
|
|