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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"
/* Number of test threads */
#define NUM_TEST_THREADS 4
/* Test OS objects */
static ATOM_TCB tcb[NUM_TEST_THREADS];
static uint8_t test_thread_stack[NUM_TEST_THREADS][TEST_THREAD_STACK_SIZE];
/* Test global data (one per thread) */
static uint32_t volatile last_time;
static int volatile last_thread_id;
static volatile int switch_cnt;
static uint32_t volatile failure_cnt[4];
static int volatile test_started;
/* Forward declarations */
static void test_thread_func (uint32_t param);
/**
* \b test_start
*
* Start kernel test.
*
* This tests the round-robin timeslicing of same priority threads.
*
* Four threads are created (over and above the main test thread).
* The main test thread sleeps for the duration of the entire test.
* While the test is ongoing, all four threads are running
* continuously at the same priority. They each check that whenever
* the system tick (atomTimeGet()) changes, it has moved on 1 tick
* since the last time the tick was checked, and that the previous
* thread is the one created before itself. In the case of the first
* thread created, the previous thread should be the last thread
* created. This proves that on every tick the four threads get a
* schedule timeslice equally, and in the same order throughout the
* duration of the test.
*
* @retval Number of failures
*/
uint32_t test_start (void)
{
int failures;
/* Default to zero failures */
failures = 0;
/* Initialise global data */
last_time = 0;
last_thread_id = -1;
failure_cnt[0] = failure_cnt[1] = failure_cnt[2] = failure_cnt[3] = 0;
/* Set test as not started until all threads are ready to go */
test_started = FALSE;
/*
* Create all four threads at the same priority as each other.
* They are given a lower priority than this thread, however,
* to ensure that once this thread wakes up to stop the test it
* can do so without confusing the scheduling tests by having
* a spell in which this thread was run.
*/
if (atomThreadCreate (&tcb[0], TEST_THREAD_PRIO + 1, test_thread_func, 0,
&test_thread_stack[0][0],
TEST_THREAD_STACK_SIZE, TRUE) != ATOM_OK)
{
ATOMLOG (_STR("Bad thread create\n"));
failures++;
}
else if (atomThreadCreate (&tcb[1], TEST_THREAD_PRIO + 1, test_thread_func, 1,
&test_thread_stack[1][0],
TEST_THREAD_STACK_SIZE, TRUE) != ATOM_OK)
{
ATOMLOG (_STR("Bad thread create\n"));
failures++;
}
else if (atomThreadCreate (&tcb[2], TEST_THREAD_PRIO + 1, test_thread_func, 2,
&test_thread_stack[2][0],
TEST_THREAD_STACK_SIZE, TRUE) != ATOM_OK)
{
ATOMLOG (_STR("Bad thread create\n"));
failures++;
}
else if (atomThreadCreate (&tcb[3], TEST_THREAD_PRIO + 1, test_thread_func, 3,
&test_thread_stack[3][0],
TEST_THREAD_STACK_SIZE, TRUE) != ATOM_OK)
{
ATOMLOG (_STR("Bad thread create\n"));
failures++;
}
/* Start the test */
test_started = TRUE;
/* Sleep for 5 seconds during test */
atomTimerDelay (5 * SYSTEM_TICKS_PER_SEC);
/* Stop the test */
test_started = FALSE;
/* Sleep for tests to complete */
atomTimerDelay (SYSTEM_TICKS_PER_SEC/4);
/* Count any failures from test threads */
failures += failure_cnt[0] + failure_cnt[1] + failure_cnt[2] + failure_cnt[3];
/* 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 Thread ID (0 to 3)
*
* @return None
*/
static void test_thread_func (uint32_t param)
{
int thread_id, expected_thread;
int time_error, thread_error;
uint32_t new_time;
CRITICAL_STORE;
/* Pull out thread ID */
thread_id = (int)param;
/* Run forever */
while (1)
{
/* Check if test is currently in operation */
if (test_started)
{
/*
* If the system time has ticked over, check that the currently
* running thread is not the one that was running last tick.
*/
/* Default to no error this time */
time_error = thread_error = FALSE;
/* Do the whole operation with interrupts locked out */
CRITICAL_START();
/* Check if time has ticked over */
new_time = atomTimeGet();
/* Only perform the check if this is not the first thread to run */
if ((last_time != 0) && (last_thread_id != -1))
{
/* Check if the time has ticked over */
if (new_time != last_time)
{
/* Check time only ticked over by 1 */
if ((new_time - last_time) != 1)
{
time_error = 1;
}
/*
* We are expecting the previous thread to be our thread_id
* minus one.
*/
expected_thread = thread_id - 1;
if (expected_thread == -1)
{
expected_thread = 3;
}
/* Check that the last thread was the expected one */
if (last_thread_id != expected_thread)
{
thread_error = TRUE;
}
/* Increment the switch count */
switch_cnt++;
}
}
/* Store the currently-running thread as the last-running */
last_thread_id = thread_id;
last_time = new_time;
/* Finished with the interrupt lockout */
CRITICAL_END();
/* If we got an error above, increment the total failure count */
if (test_started && (thread_error || time_error))
{
failure_cnt[thread_id]++;
ATOMLOG(_STR("T%d\n"), thread_id);
}
}
}
}