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 /* SPDX-License-Identifier: BSD-2-Clause */
 
 /**
  * @file
  *
  * @ingroup test_bdbuf
  *
  * @brief Bdbuf test for purge.
  */
 
 /*
  * Copyright (C) 2010, 2018 embedded brains GmbH & Co. KG
  *
  * 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.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
  */
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
 #include "tmacros.h"
 
 #include <sys/stat.h>
 #include <assert.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <stdlib.h>
 #include <unistd.h>
 
 #include <rtems.h>
 #include <rtems/bdbuf.h>
 #include <rtems/test-info.h>
 
 const char rtems_test_name[] = "BLOCK 10";
 
 #define ASSERT_SC(sc) assert((sc) == RTEMS_SUCCESSFUL)
 
 #define PRIORITY_HIGH 1
 
 #define PRIORITY_INIT 2
 
 #define PRIORITY_MID 3
 
 #define PRIORITY_SWAPOUT 4
 
 #define PRIORITY_LOW 5
 
 #define PRIORITY_IDLE 6
 
 #define BLOCK_SIZE 1
 
 #define BLOCK_COUNT 1
 
 #define DISK_PATH "/disk"
 
 typedef rtems_bdbuf_buffer *(*access_func)(char task);
 
 typedef void (*release_func)(char task, rtems_bdbuf_buffer *bd);
 
 static rtems_disk_device *dd;
 
 static rtems_id task_id_init;
 
 static rtems_id task_id_purger;
 
 static rtems_id task_id_waiter;
 
 static void set_task_prio(rtems_id task, rtems_task_priority prio)
 {
   rtems_status_code sc = RTEMS_SUCCESSFUL;
   rtems_task_priority cur = 0;
 
   sc = rtems_task_set_priority(task, prio, &cur);
   ASSERT_SC(sc);
 }
 
 static void suspend(rtems_id task)
 {
   rtems_status_code sc = RTEMS_SUCCESSFUL;
 
   sc = rtems_task_suspend(task);
   ASSERT_SC(sc);
 }
 
 static void resume(rtems_id task)
 {
   rtems_status_code sc = RTEMS_SUCCESSFUL;
 
   sc = rtems_task_resume(task);
   ASSERT_SC(sc);
 }
 
 static int disk_ioctl(rtems_disk_device *dd, uint32_t req, void *arg)
 {
   rtems_status_code sc = RTEMS_SUCCESSFUL;
 
   if (req == RTEMS_BLKIO_REQUEST) {
     rtems_blkdev_request *r = arg;
 
     if (r->req == RTEMS_BLKDEV_REQ_WRITE) {
       set_task_prio(RTEMS_SELF, PRIORITY_IDLE);
       set_task_prio(RTEMS_SELF, PRIORITY_SWAPOUT);
     }
 
     rtems_blkdev_request_done(r, sc);
 
     return 0;
   } else {
     return rtems_blkdev_ioctl(dd, req, arg);
   }
 }
 
 static void disk_register(
   uint32_t block_size,
   rtems_blkdev_bnum block_count,
   rtems_disk_device **dd
 )
 {
   rtems_status_code sc = RTEMS_SUCCESSFUL;
   int fd;
   int rv;
 
   sc = rtems_blkdev_create(
     DISK_PATH,
     block_size,
     block_count,
     disk_ioctl,
     NULL
   );
   ASSERT_SC(sc);
 
   fd = open(DISK_PATH, O_RDWR);
   rtems_test_assert(fd >= 0);
 
   rv = rtems_disk_fd_get_disk_device(fd, dd);
   rtems_test_assert(rv == 0);
 
   rv = close(fd);
   rtems_test_assert(rv == 0);
 }
 
 static rtems_bdbuf_buffer *do_get(char task)
 {
   rtems_status_code sc = RTEMS_SUCCESSFUL;
   rtems_bdbuf_buffer *bd = NULL;
 
   printf("%c: try get\n", task);
 
   sc = rtems_bdbuf_get(dd, 0, &bd);
   ASSERT_SC(sc);
 
   printf("%c: get\n", task);
 
   return bd;
 }
 
 static rtems_bdbuf_buffer *do_get_mod(char task)
 {
   rtems_status_code sc = RTEMS_SUCCESSFUL;
   rtems_bdbuf_buffer *bd = NULL;
 
   printf("%c: try get modified\n", task);
 
   sc = rtems_bdbuf_get(dd, 0, &bd);
   ASSERT_SC(sc);
 
   sc = rtems_bdbuf_release_modified(bd);
   ASSERT_SC(sc);
 
   sc = rtems_bdbuf_get(dd, 0, &bd);
   ASSERT_SC(sc);
 
   printf("%c: get modified\n", task);
 
   return bd;
 }
 
 static rtems_bdbuf_buffer *do_read(char task)
 {
   rtems_status_code sc = RTEMS_SUCCESSFUL;
   rtems_bdbuf_buffer *bd = NULL;
 
   printf("%c: try read\n", task);
 
   sc = rtems_bdbuf_read(dd, 0, &bd);
   ASSERT_SC(sc);
 
   printf("%c: read\n", task);
 
   return bd;
 }
 
 static void do_rel(char task, rtems_bdbuf_buffer *bd)
 {
   rtems_status_code sc = RTEMS_SUCCESSFUL;
 
   printf("%c: release\n", task);
 
   sc = rtems_bdbuf_release(bd);
   ASSERT_SC(sc);
 
   printf("%c: release done\n", task);
 }
 
 static void do_rel_mod(char task, rtems_bdbuf_buffer *bd)
 {
   rtems_status_code sc = RTEMS_SUCCESSFUL;
 
   printf("%c: release modified\n", task);
 
   sc = rtems_bdbuf_release_modified(bd);
   ASSERT_SC(sc);
 
   printf("%c: release modified done\n", task);
 }
 
 static void do_sync(char task, rtems_bdbuf_buffer *bd)
 {
   rtems_status_code sc = RTEMS_SUCCESSFUL;
 
   printf("%c: sync\n", task);
 
   sc = rtems_bdbuf_sync(bd);
   ASSERT_SC(sc);
 
   printf("%c: sync done\n", task);
 }
 
 static void purge(char task)
 {
   printf("%c: purge\n", task);
 
   rtems_bdbuf_purge_dev(dd);
 }
 
 static void task_purger(rtems_task_argument arg)
 {
   while (true) {
     suspend(RTEMS_SELF);
 
     set_task_prio(RTEMS_SELF, PRIORITY_HIGH);
 
     purge('P');
   }
 
   rtems_task_exit();
 }
 
 static void activate_purger(rtems_task_priority prio)
 {
   set_task_prio(task_id_purger, prio);
   resume(task_id_purger);
 }
 
 static void task_waiter(rtems_task_argument arg)
 {
   while (true) {
     rtems_bdbuf_buffer *bd = NULL;
 
     suspend(RTEMS_SELF);
 
     bd = do_get('W');
 
     do_rel('W', bd);
   }
 
   rtems_task_exit();
 }
 
 static void create_waiter(void)
 {
   resume(task_id_waiter);
   set_task_prio(task_id_waiter, PRIORITY_IDLE);
 }
 
 static void restore_waiter(void)
 {
   set_task_prio(task_id_waiter, PRIORITY_HIGH);
 }
 
 static void check_access(access_func ac, release_func rel, bool waiter)
 {
   rtems_bdbuf_buffer *bd = (*ac)('I');
 
   if (waiter) {
     create_waiter();
   }
 
   purge('I');
 
   (*rel)('I', bd);
 
   if (waiter) {
     restore_waiter();
   }
 }
 
 static void check_intermediate(release_func rel, bool waiter)
 {
   rtems_bdbuf_buffer *bd = do_read('I');
 
   if (waiter) {
     create_waiter();
   }
 
   (*rel)('I', bd);
 
   purge('I');
 
   if (waiter) {
     restore_waiter();
   }
 }
 
 static void check_transfer(rtems_task_priority prio, bool waiter)
 {
   rtems_bdbuf_buffer *bd = do_read('I');
 
   if (waiter) {
     create_waiter();
   }
 
   activate_purger(prio);
 
   do_sync('I', bd);
 
   if (waiter) {
     restore_waiter();
   }
 }
 
 static const bool waiter_table [] = {
   true,
   false
 };
 
 static const access_func access_table [] = {
   do_get,
   do_get_mod,
   do_read
 };
 
 static const release_func release_table [] = {
   do_rel,
   do_rel_mod,
   do_sync
 };
 
 static const rtems_task_priority purger_table [] = {
   PRIORITY_MID,
   PRIORITY_LOW
 };
 
 #define ARRAY_COUNT(array) (sizeof(array) / sizeof(array [0]))
 
 #define WAITER_COUNT ARRAY_COUNT(waiter_table)
 
 #define ACCESS_COUNT ARRAY_COUNT(access_table)
 
 #define RELEASE_COUNT ARRAY_COUNT(release_table)
 
 #define PURGER_COUNT ARRAY_COUNT(purger_table)
 
 static const char *waiter_assoc_table [WAITER_COUNT] = {
   "with waiter",
   "without waiter"
 };
 
 static const char *access_assoc_table [ACCESS_COUNT] = {
   "get",
   "access modified",
   "read"
 };
 
 static const char *release_assoc_table [RELEASE_COUNT] = {
   "release",
   "release modified",
   "sync"
 };
 
 static const char *purger_assoc_table [PURGER_COUNT] = {
   "sync",
   "transfer"
 };
 
 static rtems_task Init(rtems_task_argument argument)
 {
   rtems_status_code sc = RTEMS_SUCCESSFUL;
   size_t i_w = 0;
   size_t i_ac = 0;
   size_t i_rel = 0;
   size_t i_p = 0;
 
   TEST_BEGIN();
 
   task_id_init = rtems_task_self();
 
   disk_register(BLOCK_SIZE, BLOCK_COUNT, &dd);
 
   sc = rtems_task_create(
     rtems_build_name('P', 'U', 'R', 'G'),
     PRIORITY_HIGH,
     0,
     RTEMS_DEFAULT_MODES,
     RTEMS_DEFAULT_ATTRIBUTES,
     &task_id_purger
   );
   ASSERT_SC(sc);
 
   sc = rtems_task_start(task_id_purger, task_purger, 0);
   ASSERT_SC(sc);
 
   set_task_prio(task_id_purger, PRIORITY_LOW);
 
   sc = rtems_task_create(
     rtems_build_name('W', 'A', 'I', 'T'),
     PRIORITY_HIGH,
     0,
     RTEMS_DEFAULT_MODES,
     RTEMS_DEFAULT_ATTRIBUTES,
     &task_id_waiter
   );
   ASSERT_SC(sc);
 
   sc = rtems_task_start(task_id_waiter, task_waiter, 0);
   ASSERT_SC(sc);
 
   for (i_ac = 0; i_ac < ACCESS_COUNT; ++i_ac) {
     for (i_rel = 0; i_rel < RELEASE_COUNT; ++i_rel) {
       for (i_w = 0; i_w < WAITER_COUNT; ++i_w) {
         printf("test case [access]: %s and %s %s\n", access_assoc_table [i_ac], release_assoc_table [i_rel], waiter_assoc_table [i_w]);
         check_access(access_table [i_ac], release_table [i_rel], waiter_table [i_w]);
       }
     }
   }
 
   for (i_rel = 0; i_rel < RELEASE_COUNT; ++i_rel) {
     for (i_w = 0; i_w < WAITER_COUNT; ++i_w) {
       printf("test case [intermediate]: %s %s\n", release_assoc_table [i_rel], waiter_assoc_table [i_w]);
       check_intermediate(release_table [i_rel], waiter_table [i_w]);
     }
   }
 
   for (i_p = 0; i_p < PURGER_COUNT; ++i_p) {
     for (i_w = 0; i_w < WAITER_COUNT; ++i_w) {
       printf("test case [transfer]: %s %s\n", purger_assoc_table [i_p], waiter_assoc_table [i_w]);
       check_transfer(purger_table [i_p], waiter_table [i_w]);
     }
   }
 
   TEST_END();
 
   exit(0);
 }
 
 #define CONFIGURE_INIT
 
 #define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER
 #define CONFIGURE_APPLICATION_NEEDS_SIMPLE_CONSOLE_DRIVER
 #define CONFIGURE_APPLICATION_NEEDS_LIBBLOCK
 
 #define CONFIGURE_MAXIMUM_FILE_DESCRIPTORS 4
 
 #define CONFIGURE_MAXIMUM_TASKS 3
 
 #define CONFIGURE_INITIAL_EXTENSIONS RTEMS_TEST_INITIAL_EXTENSION
 
 #define CONFIGURE_RTEMS_INIT_TASKS_TABLE
 
 #define CONFIGURE_INIT_TASK_PRIORITY PRIORITY_INIT
 #define CONFIGURE_INIT_TASK_ATTRIBUTES RTEMS_DEFAULT_ATTRIBUTES
 #define CONFIGURE_INIT_TASK_INITIAL_MODES RTEMS_DEFAULT_MODES
 
 #define CONFIGURE_SWAPOUT_TASK_PRIORITY PRIORITY_SWAPOUT
 
 #define CONFIGURE_BDBUF_BUFFER_MIN_SIZE BLOCK_SIZE
 #define CONFIGURE_BDBUF_BUFFER_MAX_SIZE BLOCK_SIZE
 #define CONFIGURE_BDBUF_CACHE_MEMORY_SIZE (BLOCK_SIZE * BLOCK_COUNT)
 
 #include <rtems/confdefs.h>

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