esp-idf/components/bt/bluedroid/osi/osi_arch.c

194 lines
5.3 KiB
C
Executable File

/*
* Copyright (c) 2001-2003 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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.
*
* This file is part of the bluedroid stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#include "osi_arch.h"
/** Create a new mutex
* @param mutex pointer to the mutex to create
* @return a new mutex */
int
osi_mutex_new(osi_mutex_t *pxMutex)
{
int xReturn = -1;
*pxMutex = xSemaphoreCreateMutex();
if (*pxMutex != NULL) {
xReturn = 0;
}
//LWIP_DEBUGF(THREAD_SAFE_DEBUG, ("osi_mutex_new: m=%p\n", *pxMutex));
return xReturn;
}
/** Lock a mutex
* @param mutex the mutex to lock */
void
osi_mutex_lock(osi_mutex_t *pxMutex)
{
while (xSemaphoreTake(*pxMutex, portMAX_DELAY) != pdPASS);
}
int
osi_mutex_trylock(osi_mutex_t *pxMutex)
{
if (xSemaphoreTake(*pxMutex, 0) == pdPASS) return 0;
else return -1;
}
/** Unlock a mutex
* @param mutex the mutex to unlock */
void
osi_mutex_unlock(osi_mutex_t *pxMutex)
{
xSemaphoreGive(*pxMutex);
}
/** Delete a semaphore
* @param mutex the mutex to delete */
void
osi_mutex_free(osi_mutex_t *pxMutex)
{
//LWIP_DEBUGF(THREAD_SAFE_DEBUG, ("osi_mutex_free: m=%p\n", *pxMutex));
vQueueDelete(*pxMutex);
}
/*-----------------------------------------------------------------------------------*/
// Creates and returns a new semaphore. The "init_count" argument specifies
// the initial state of the semaphore, "max_count" specifies the maximum value
// that can be reached.
int
osi_sem_new(osi_sem_t *sem, uint32_t max_count, uint32_t init_count)
{
int xReturn = -1;
if (sem) {
*sem = xSemaphoreCreateCounting(max_count, init_count);
if ((*sem) != NULL) {
xReturn = 0;
}
}
return xReturn;
}
/*-----------------------------------------------------------------------------------*/
// Signals a semaphore
void
osi_sem_signal(osi_sem_t *sem)
{
xSemaphoreGive(*sem);
}
/*-----------------------------------------------------------------------------------*/
/*
Blocks the thread while waiting for the semaphore to be
signaled. If the "timeout" argument is non-zero, the thread should
only be blocked for the specified time (measured in
milliseconds).
If the timeout argument is non-zero, the return value is the number of
milliseconds spent waiting for the semaphore to be signaled. If the
semaphore wasn't signaled within the specified time, the return value is
OSI_ARCH_TIMEOUT. If the thread didn't have to wait for the semaphore
(i.e., it was already signaled), the function may return zero.
Notice that lwIP implements a function with a similar name,
osi_sem_wait(), that uses the osi_arch_sem_wait() function.
*/
uint32_t
osi_sem_wait(osi_sem_t *sem, uint32_t timeout)
{
portTickType StartTime, EndTime, Elapsed;
unsigned long ulReturn;
StartTime = xTaskGetTickCount();
if (timeout != 0) {
if (xSemaphoreTake(*sem, timeout / portTICK_RATE_MS) == pdTRUE) {
EndTime = xTaskGetTickCount();
Elapsed = (EndTime - StartTime) * portTICK_RATE_MS;
if (Elapsed == 0) {
Elapsed = 1;
}
ulReturn = Elapsed;
} else {
ulReturn = OSI_ARCH_TIMEOUT;
}
} else { // must block without a timeout
while (xSemaphoreTake(*sem, portMAX_DELAY) != pdTRUE);
EndTime = xTaskGetTickCount();
Elapsed = (EndTime - StartTime) * portTICK_RATE_MS;
if (Elapsed == 0) {
Elapsed = 1;
}
ulReturn = Elapsed;
}
return ulReturn ; // return time blocked
}
/*-----------------------------------------------------------------------------------*/
// Deallocates a semaphore
void
osi_sem_free(osi_sem_t *sem)
{
vSemaphoreDelete(*sem);
}
/*-----------------------------------------------------------------------------------*/
// Initialize osi arch
void
osi_arch_init(void)
{
}
/*-----------------------------------------------------------------------------------*/
uint32_t
osi_now(void)
{
return xTaskGetTickCount();
}
void osi_delay_ms(uint32_t ms)
{
vTaskDelay(ms/portTICK_RATE_MS);
}