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/***************************************************************************/
/* Copyright (c) 2024 Microsoft Corporation */
/* Copyright (c) 2026 Eclipse ThreadX contributors */
/* */
/* This program and the accompanying materials are made available under */
/* the terms of the MIT License which is available at */
/* https://opensource.org/licenses/MIT. */
/* */
/* SPDX-License-Identifier: MIT */
/***************************************************************************/
/* This test is designed to test the mutex suspension and another thread resuming the
higher priority thread by doing a mutex put. Higher-priority thread should preempt. */
#include <stdio.h>
#include "tx_api.h"
static unsigned long thread_0_counter = 0;
static TX_THREAD thread_0;
static unsigned long thread_1_counter = 0;
static TX_THREAD thread_1;
static TX_MUTEX mutex_0;
/* Define thread prototypes. */
static void thread_0_entry(ULONG thread_input);
static void thread_1_entry(ULONG thread_input);
/* Prototype for test control return. */
void test_control_return(UINT status);
/* Define what the initial system looks like. */
#ifdef CTEST
void test_application_define(void *first_unused_memory)
#else
void threadx_mutex_preemption_application_define(void *first_unused_memory)
#endif
{
UINT status;
CHAR *pointer;
/* Put first available memory address into a character pointer. */
pointer = (CHAR *) first_unused_memory;
/* Put system definition stuff in here, e.g. thread creates and other assorted
create information. */
status = tx_thread_create(&thread_0, "thread 0", thread_0_entry, 1,
pointer, TEST_STACK_SIZE_PRINTF,
16, 16, 100, TX_AUTO_START);
pointer = pointer + TEST_STACK_SIZE_PRINTF;
/* Check for status. */
if (status != TX_SUCCESS)
{
printf("Running Mutex Put with Preemption Test.............................. ERROR #1\n");
test_control_return(1);
}
status = tx_thread_create(&thread_1, "thread 1", thread_1_entry, 1,
pointer, TEST_STACK_SIZE_PRINTF,
15, 15, 100, TX_DONT_START);
pointer = pointer + TEST_STACK_SIZE_PRINTF;
/* Check for status. */
if (status != TX_SUCCESS)
{
printf("Running Mutex Put with Preemption Test.............................. ERROR #2\n");
test_control_return(1);
}
/* Create a mutex. */
status = tx_mutex_create(&mutex_0, "mutex 0", TX_NO_INHERIT);
/* Check for status. */
if (status != TX_SUCCESS)
{
printf("Running Mutex Put with Preemption Test.............................. ERROR #3\n");
test_control_return(1);
}
}
/* Define the test threads. */
static void thread_0_entry(ULONG thread_input)
{
UINT status;
/* Inform user. */
printf("Running Mutex Put with Preemption Test.............................. ");
/* Increment thread 0 counter. */
thread_0_counter++;
/* Get the mutex. */
status = tx_mutex_get(&mutex_0, TX_NO_WAIT);
/* Should be successful. */
if (status != TX_SUCCESS)
{
/* Mutex error. */
printf("ERROR #4\n");
test_control_return(1);
}
/* Now resume the higher priority thread to cause suspension. */
tx_thread_resume(&thread_1);
/* The other thread should now be suspended on the mutex. */
if (thread_1_counter != 1)
{
/* Mutex error. */
printf("ERROR #5\n");
test_control_return(1);
}
/* Release the mutex, this should cause the other thread
to preempt. */
status = tx_mutex_put(&mutex_0);
/* Check status and run counter of other thread. */
if ((status != TX_SUCCESS) || (thread_1_counter != 2))
{
/* Mutex error. */
printf("ERROR #6\n");
test_control_return(1);
}
else
{
/* Successful test. */
printf("SUCCESS!\n");
test_control_return(0);
}
}
static void thread_1_entry(ULONG thread_input)
{
UINT status;
/* Increment thread run counter. */
thread_1_counter++;
/* Suspend on the mutex. */
status = tx_mutex_get(&mutex_0, TX_WAIT_FOREVER);
/* Did we get the right status? */
if (status == TX_SUCCESS)
thread_1_counter++;
}
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