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/*! @file
* @brief Check how rtems_bdbuf_read() handles read request
* for a buffer that is owned by an application.
*
* Test sequence:
* -# Call rtems_bdbuf_read() function in thread #1 and
* provide successful read complete notification for this operation.
* As the result rtems_bdbuf_read() returns RTEMS_SUCCESSFUL
* in thread #1.
* -# In thread #2 call rtems_bdbuf_read() function for the same
* block number. A buffer for this block is owned by an application
* and as the result thread #2 block on this function.
* -# Call rtems_bdbuf_release() function in thread #1 in order to give
* it back under control of bdbuf library.
* -# Buffer now is ready to be returned for another application and
* as the result rtems_bdbuf_read() unblocks and returns
* RTEMS_SUCCESSFUL in thread #2.
* -# Call rtems_bdbuf_release() function in thread #2.
*
* 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.org/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <bdbuf_tests.h>
static rtems_task bdbuf_test1_5_thread1(rtems_task_argument arg);
static rtems_task bdbuf_test1_5_thread2(rtems_task_argument arg);
#define TEST_BLK_NUM 50
void
bdbuf_test1_5_main()
{
bdbuf_test_msg msg;
TEST_START("Test 1.5");
START_THREAD(1, bdbuf_test1_5_thread1);
START_THREAD(2, bdbuf_test1_5_thread2);
/*
* Step 1:
* Thread #1 calls rtems_bdbuf_read() and successfully
* get requested buffer.
*/
WAIT_DRV_MSG(&msg);
SEND_DRV_MSG(0, 0, RTEMS_SUCCESSFUL, 0);
WAIT_THREAD_SYNC(1);
TEST_CHECK_RESULT("1");
/*
* Step 2:
* Thread #2 calls rtems_bdbuf_read() and blocks
* on this call because thread #1 owns a buffer.
*/
CONTINUE_THREAD(2);
/* Make sure thread #2 managed to block on a read request. */
CHECK_THREAD_BLOCKED(2);
/*
* Step 3:
* Now thread #1 releases a buffer.
*/
CONTINUE_THREAD(1);
/*
* Step 4:
* Thread #2 should unblock now and get the buffer.
*/
WAIT_THREAD_SYNC(2);
TEST_CHECK_RESULT("4");
/*
* Step 5:
* Thread #2 release buffer.
*/
CONTINUE_THREAD(2);
TEST_STOP();
}
static rtems_task
bdbuf_test1_5_thread1(rtems_task_argument arg)
{
rtems_status_code rc;
rtems_bdbuf_buffer *bd = NULL;
/*
* Step 1:
* read blk #N on thread #1
*/
rc = rtems_bdbuf_read(test_dd, TEST_BLK_NUM, &bd);
if (rc != RTEMS_SUCCESSFUL)
{
TEST_FAILED();
}
CONTINUE_MAIN(1);
/*
* Step 3:
* Release buffer returned on step 1.
*/
rc = rtems_bdbuf_release(bd);
if (rc != RTEMS_SUCCESSFUL)
{
TEST_FAILED();
}
THREAD_END();
}
static rtems_task
bdbuf_test1_5_thread2(rtems_task_argument arg)
{
rtems_status_code rc;
rtems_bdbuf_buffer *bd = NULL;
WAIT_MAIN_SYNC(2);
/*
* Step 2:
* Try to read block #N. Right now thread #1 owns
* this buffer, so we will block waiting for buffer.
*/
rc = rtems_bdbuf_read(test_dd, TEST_BLK_NUM, &bd);
if (rc != RTEMS_SUCCESSFUL)
{
TEST_FAILED();
}
CONTINUE_MAIN(2);
rc = rtems_bdbuf_release(bd);
if (rc != RTEMS_SUCCESSFUL)
{
TEST_FAILED();
}
THREAD_END();
}
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