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/*
* Copyright (c) 2010, 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 "atomtests.h"
#include "atommutex.h"
/* Number of times to lock the mutex during test */
#define TEST_LOCK_CNT 250
/* Number of test threads */
#define NUM_TEST_THREADS 1
/* Test OS objects */
static ATOM_MUTEX mutex1;
static ATOM_TCB tcb[NUM_TEST_THREADS];
static uint8_t test_thread_stack[NUM_TEST_THREADS][TEST_THREAD_STACK_SIZE];
/* Global shared data protected by mutex */
static volatile int shared_data;
/* Forward declarations */
static void test_thread_func (uint32_t param);
/**
* \b test_start
*
* Start mutex test.
*
* This tests the lock count of a mutex. The mutex object should
* count the number of times a thread has locked the mutex and
* not fully release it for use by another thread until it has
* been released the same number of times it was locked.
*
* @retval Number of failures
*/
uint32_t test_start (void)
{
int failures;
int i;
/* Default to zero failures */
failures = 0;
/* Create mutex */
if (atomMutexCreate (&mutex1) != ATOM_OK)
{
ATOMLOG (_STR("Error creating mutex\n"));
failures++;
}
else
{
/* Initialise the shared_data to zero */
shared_data = 0;
/* Take the mutex several times */
for (i = 0; i < TEST_LOCK_CNT; i++)
{
if (atomMutexGet (&mutex1, 0) != ATOM_OK)
{
ATOMLOG (_STR("Error taking mutex\n"));
failures++;
break;
}
}
/* Create second thread */
if (atomThreadCreate(&tcb[0], TEST_THREAD_PRIO, test_thread_func, 1,
&test_thread_stack[0][0],
TEST_THREAD_STACK_SIZE, TRUE) != ATOM_OK)
{
/* Fail */
ATOMLOG (_STR("Error creating test thread\n"));
failures++;
}
/*
* The second thread has now been created and should block on
* the mutex until we release it. We wait a while and check that
* shared_data has not been modified.
*/
for (i = 0; i < 4; i++)
{
/*
* Sleep for a while to give the second thread a chance to
* modify shared_data, thought it shouldn't until we
* release the mutex enough times.
*/
atomTimerDelay (SYSTEM_TICKS_PER_SEC/4);
/* Check shared data. The second thread always sets it to one. */
if (shared_data != 0)
{
ATOMLOG (_STR("Shared data modified\n"));
failures++;
break;
}
}
/* Check successful so far */
if (failures == 0)
{
/*
* Release the mutex TEST_LOCK_CNT-1 times, after which we
* should still own the mutex (until we release one more time).
*/
for (i = 0; i < TEST_LOCK_CNT-1; i++)
{
if (atomMutexPut (&mutex1) != ATOM_OK)
{
ATOMLOG (_STR("Failed release\n"));
failures++;
}
}
/*
* Wait a little while then check that shared_data has
* not been modified (we should still own the mutex).
*/
atomTimerDelay (SYSTEM_TICKS_PER_SEC/4);
if (shared_data != 0)
{
ATOMLOG (_STR("Expected unmodified\n"));
failures++;
}
/*
* Release the mutex one more time, after which we should no
* longer own the mutex (and wake up the second thread).
*/
if (atomMutexPut (&mutex1) != ATOM_OK)
{
ATOMLOG (_STR("Failed release\n"));
failures++;
}
/*
* Wait a little while then check that shared_data has
* been modified by the second thread.
*/
atomTimerDelay (SYSTEM_TICKS_PER_SEC/4);
if (shared_data != 1)
{
ATOMLOG (_STR("Expected modified\n"));
failures++;
}
}
/*
* Finally attempt to release the mutex one more time, while
* we no longer own the mutex. Either the second thread will
* have ownership of it, or no thread will have ownership.
* In both cases we expect to get an ownership error when we
* attempt to release it.
*/
if (atomMutexPut (&mutex1) != ATOM_ERR_OWNERSHIP)
{
ATOMLOG (_STR("Failed locked+1 release\n"));
failures++;
}
/* Delete mutex, test finished */
if (atomMutexDelete (&mutex1) != ATOM_OK)
{
ATOMLOG (_STR("Delete failed\n"));
failures++;
}
}
/* Check thread stack usage (if enabled) */
#ifdef ATOM_STACK_CHECKING
{
uint32_t used_bytes, free_bytes;
int thread;
/* Check all threads */
for (thread = 0; thread < NUM_TEST_THREADS; thread++)
{
/* Check thread stack usage */
if (atomThreadStackCheck (&tcb[thread], &used_bytes, &free_bytes) != ATOM_OK)
{
ATOMLOG (_STR("StackCheck\n"));
failures++;
}
else
{
/* Check the thread did not use up to the end of stack */
if (free_bytes == 0)
{
ATOMLOG (_STR("StackOverflow %d\n"), thread);
failures++;
}
/* Log the stack usage */
#ifdef TESTS_LOG_STACK_USAGE
ATOMLOG (_STR("StackUse:%d\n"), (int)used_bytes);
#endif
}
}
}
#endif
/* Quit */
return failures;
}
/**
* \b test_thread_func
*
* Entry point for test thread.
*
* @param[in] param Unused (optional thread entry parameter)
*
* @return None
*/
static void test_thread_func (uint32_t param)
{
uint8_t status;
/* Compiler warnings */
param = param;
/* Repeatedly attempt to get the mutex and set shared_data to 1 */
while (1)
{
/* Block on the mutex */
if ((status = atomMutexGet (&mutex1, 0)) != ATOM_OK)
{
/* Error getting mutex, notify the status code */
ATOMLOG (_STR("G%d\n"), status);
break;
}
/* Got the mutex */
else
{
/* Set shared_data to signify that we think we have the mutex */
shared_data = 1;
/* Release the mutex allowing the main thread to take it again */
if ((status = atomMutexPut (&mutex1)) != ATOM_OK)
{
/* Error putting mutex, notify the status code */
ATOMLOG (_STR("P%d\n"), status);
break;
}
}
}
/* Loop forever - we only reach here on error */
while (1)
{
atomTimerDelay (SYSTEM_TICKS_PER_SEC);
}
}
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