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timer8.c
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timer8.c
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/*
* Copyright (c) 2016, Kelvin Lawson. 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. No personal names or organizations' names associated with the
* Atomthreads project may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE ATOMTHREADS PROJECT 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 THE PROJECT OR 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 "atom.h"
#include "atomtimer.h"
#include "atomtests.h"
/* Tick delay before each callback */
#define CALLBACK_TICKS 2
/* Number of re-registrations to make from callbacks */
#define NUM_CALLBACKS (SYSTEM_TICKS_PER_SEC / CALLBACK_TICKS)
/* Test OS objects */
static ATOM_TIMER timer_cb;
/* Global test data */
static int callback_ran_count;
/* Forward declarations */
static void testCallback (POINTER cb_data);
/**
* \b test_start
*
* Start timer test.
*
* This test checks that a timer can be registered from within a timer
* callback context. i.e. checks the kernel timer queue can handle additions
* to the timer queue while already walking the queue during a timer callback.
*
* @retval Number of failures
*/
uint32_t test_start (void)
{
int failures;
/* Default to zero failures */
failures = 0;
/* Clear down the callback count */
callback_ran_count = 0;
/* Fill out timer request structures for 2 ticks from now */
timer_cb.cb_ticks = CALLBACK_TICKS;
timer_cb.cb_func = testCallback;
timer_cb.cb_data = &callback_ran_count;
/* Register timer */
if (atomTimerRegister (&timer_cb) != ATOM_OK)
{
ATOMLOG (_STR("TimerReg\n"));
failures++;
}
/* Timer was successfully created */
else
{
/* Sleep for twice the period we expect the test to take */
atomTimerDelay (2 * CALLBACK_TICKS * NUM_CALLBACKS);
/*
* We should now find that the timer callback has run the correct
* number of times.
*/
if (callback_ran_count != NUM_CALLBACKS)
{
ATOMLOG (_STR("Callback count %d vs %d\n"), callback_ran_count, NUM_CALLBACKS);
failures++;
}
}
/* Quit */
return failures;
}
/**
* \b testCallback
*
* Increment a counut to say we ran. Also register the same timer to occur
* again, up to a fixed number of times. The main test procedure can wait
* and check the count to see that all of the requested callbacks occurred
* (and hence timer registration from within a timer callback worked).
*
* @param[in] cb_data Pointer to counter of callback runs
*/
static void testCallback (POINTER cb_data)
{
int *ran_count_ptr = (int *)cb_data;
/* Callback was called */
*ran_count_ptr += 1;
/* If the test is still running, register the same timer again */
if (*ran_count_ptr < NUM_CALLBACKS)
{
/* Same timer details as previously */
timer_cb.cb_ticks = CALLBACK_TICKS;
timer_cb.cb_func = testCallback;
timer_cb.cb_data = &callback_ran_count;
if (atomTimerRegister (&timer_cb) != ATOM_OK)
{
ATOMLOG (_STR("TimerCbReg\n"));
}
}
}