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/*! @file
* @brief Check that when there are some tasks waiting for an available
* buffer only one of them get a buffer after some other task releases one.
*
* Test sequence:
* -# Call rtems_bdbuf_read(#N1) in thread #1.
* -# Call rtems_bdbuf_get(#N2) in thread #2.
* This thread blocks because we have no buffers available.
* -# Call rtems_bdbuf_get(#N3) in thread #3.
* This thread also blocks because we have no buffers available.
* -# Call rtems_bdbuf_release_modified(#N1) in thread #1.
* -# Check that only one thread (thread #2 or thread #3) got a buffer.
* Another thread shall still be blocked.
*
* Copyright (C) 2010 OKTET Labs, St.-Petersburg, Russia
* Author: Oleg Kravtsov <Oleg.Kravtsov@oktetlabs.ru>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <bdbuf_tests.h>
static rtems_task bdbuf_test3_2_thread1(rtems_task_argument arg);
static rtems_task bdbuf_test3_2_thread2(rtems_task_argument arg);
static rtems_task bdbuf_test3_2_thread3(rtems_task_argument arg);
/* Block number used in the test */
#define TEST_BLK_NUM_N1 90
#define TEST_BLK_NUM_N2 92
#define TEST_BLK_NUM_N3 94
void
bdbuf_test3_2_main()
{
bdbuf_test_msg msg;
TEST_START("Test 3.2");
/*
* Create working threads.
*/
SET_THREAD_PRIORITY(2, LOW);
SET_THREAD_PRIORITY(3, HIGH);
START_THREAD(1, bdbuf_test3_2_thread1);
START_THREAD(2, bdbuf_test3_2_thread2);
START_THREAD(3, bdbuf_test3_2_thread3);
/*
* Start thread #1: it will read buffer #N1.
* Driver is asked to read this buffer.
*/
WAIT_DRV_MSG(&msg);
SEND_DRV_MSG(0, 0, RTEMS_SUCCESSFUL, 0);
WAIT_THREAD_SYNC(1);
/*
* Block thread #2 and thread #3 on get buffers #N1 and #N2
* correspondingly.
*/
CONTINUE_THREAD(2);
CONTINUE_THREAD(3);
/* Make sure threads managed to block on the buffers get. */
CHECK_THREAD_BLOCKED(2);
CHECK_THREAD_BLOCKED(3);
/*
* Step 4:
* Thread #1 release buffer.
*/
CONTINUE_THREAD(1);
/*
* Check that thread #2 unblocked after this.
*/
WAIT_THREAD_SYNC(2);
TEST_CHECK_RESULT("5");
CHECK_THREAD_BLOCKED(3);
/* Release buffer in thread #2 */
CONTINUE_THREAD(2);
/* wait for driver message to flush it onto a disk */
WAIT_DRV_MSG_WR(&msg);
SEND_DRV_MSG(0, 0, RTEMS_SUCCESSFUL, 0);
/* Wait for thread #3 to be unblocked */
WAIT_THREAD_SYNC(3);
/* Release buffer in thread #3 */
CONTINUE_THREAD(3);
/* wait for driver message to flush it onto a disk */
WAIT_DRV_MSG_WR(&msg);
SEND_DRV_MSG(0, 0, RTEMS_SUCCESSFUL, 0);
TEST_END();
}
static rtems_task
bdbuf_test3_2_thread1(rtems_task_argument arg)
{
rtems_status_code rc;
rtems_bdbuf_buffer *bd = NULL;
/*
* Step 1:
* Call rtems_bdbuf_read(#N) to get a buffer;
*/
rc = rtems_bdbuf_read(test_dd, TEST_BLK_NUM_N1, &bd);
if (rc != RTEMS_SUCCESSFUL)
{
TEST_FAILED();
}
CONTINUE_MAIN(1);
/*
* Step 4:
* Call rtems_bdbuf_release(#N).
*/
rc = rtems_bdbuf_release(bd);
if (rc != RTEMS_SUCCESSFUL)
{
TEST_FAILED();
}
THREAD_END();
}
static rtems_task
bdbuf_test3_2_thread2(rtems_task_argument arg)
{
rtems_status_code rc;
rtems_bdbuf_buffer *bd = NULL;
WAIT_MAIN_SYNC(2);
/*
* Step 2:
* In thread #2 call get(#N2)
*/
rc = rtems_bdbuf_get(test_dd, TEST_BLK_NUM_N2, &bd);
if (rc != RTEMS_SUCCESSFUL)
{
TEST_FAILED();
}
printk("Thread #2 DEBLOCK\n");
CONTINUE_MAIN(2);
rc = rtems_bdbuf_release_modified(bd);
if (rc != RTEMS_SUCCESSFUL)
{
TEST_FAILED();
}
THREAD_END();
}
static rtems_task
bdbuf_test3_2_thread3(rtems_task_argument arg)
{
rtems_status_code rc;
rtems_bdbuf_buffer *bd = NULL;
WAIT_MAIN_SYNC(3);
/*
* Step 3:
* In thread #3 call get(#N3)
*/
rc = rtems_bdbuf_get(test_dd, TEST_BLK_NUM_N3, &bd);
if (rc != RTEMS_SUCCESSFUL)
{
TEST_FAILED();
}
printk("Thread #3 DEBLOCK\n");
CONTINUE_MAIN(3);
rc = rtems_bdbuf_release_modified(bd);
if (rc != RTEMS_SUCCESSFUL)
{
TEST_FAILED();
}
THREAD_END();
}
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