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/**************************************************************************/
/* */
/* Copyright (c) Microsoft Corporation. All rights reserved. */
/* */
/* This software is licensed under the Microsoft Software License */
/* Terms for Microsoft Azure RTOS. Full text of the license can be */
/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
/* and in the root directory of this software. */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** USBX Component */
/** */
/** Utility */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#define UX_SOURCE_CODE
#include "ux_api.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_utility_semaphore_get PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function gets a semaphore signal. */
/* */
/* INPUT */
/* */
/* semaphore Semaphore to get signal from */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* tx_thread_identify ThreadX identify thread */
/* tx_thread_info_get ThreadX get thread info */
/* tx_semaphore_get ThreadX semaphore get */
/* */
/* CALLED BY */
/* */
/* USBX Components */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */
/* 09-30-2020 Chaoqiong Xiao Modified comment(s), */
/* used UX prefix to refer to */
/* TX symbols instead of using */
/* them directly, */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
UINT _ux_utility_semaphore_get(UX_SEMAPHORE *semaphore, ULONG semaphore_signal)
{
UINT status;
UX_THREAD *my_thread;
CHAR *name;
UINT state;
ULONG run_count;
UINT priority;
UINT preemption_threshold;
ULONG time_slice;
UX_THREAD *next_thread;
UX_THREAD *suspended_thread;
/* Call TX to know my own tread. */
my_thread = tx_thread_identify();
/* Retrieve information about the previously created thread "my_thread." */
tx_thread_info_get(my_thread, &name, &state, &run_count,
&priority, &preemption_threshold,
&time_slice, &next_thread,&suspended_thread);
/* Is this the lowest priority thread in the system trying to use TX services ? */
if (priority > _ux_system -> ux_system_thread_lowest_priority)
{
/* We need to remember this thread priority. */
_ux_system -> ux_system_thread_lowest_priority = priority;
}
/* Get ThreadX semaphore instance. */
status = tx_semaphore_get(semaphore, semaphore_signal);
/* Return completion status. */
return(status);
}