threadx
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Outline
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#define TX_SOURCE_CODE
#include "tx_api.h"
#include "tx_thread.h"
#include "tx_timer.h"
#include "tx_semaphore.h"
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_txe_semaphore_get(TX_SEMAPHORE *, ULONG)
Files
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SourceVuSTM32 Libraries and Samplesthreadxcommon/src/txe_semaphore_get.c
 
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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. */ /* */... /**************************************************************************/ ... /**************************************************************************/ /**************************************************************************/ /** */ /** ThreadX Component */ /** */ /** Semaphore */ /** */... /**************************************************************************/ /**************************************************************************/ #define TX_SOURCE_CODE /* Include necessary system files. */ #include "tx_api.h" #include "tx_thread.h" #include "tx_timer.h" #include "tx_semaphore.h" ... /**************************************************************************/ /* */ /* FUNCTION RELEASE */ /* */ /* _txe_semaphore_get PORTABLE C */ /* 6.1 */ /* AUTHOR */ /* */ /* William E. Lamie, Microsoft Corporation */ /* */ /* DESCRIPTION */ /* */ /* This function checks for errors in the semaphore get function call. */ /* */ /* INPUT */ /* */ /* semaphore_ptr Pointer to semaphore control block*/ /* wait_option Suspension option */ /* */ /* OUTPUT */ /* */ /* TX_SEMAPHORE_ERROR Invalid semaphore pointer */ /* TX_WAIT_ERROR Invalid wait option */ /* status Actual completion status */ /* */ /* CALLS */ /* */ /* _tx_semaphore_get Actual get semaphore function */ /* */ /* CALLED BY */ /* */ /* Application Code */ /* */ /* RELEASE HISTORY */ /* */ /* DATE NAME DESCRIPTION */ /* */ /* 05-19-2020 William E. Lamie Initial Version 6.0 */ /* 09-30-2020 Yuxin Zhou Modified comment(s), */ /* resulting in version 6.1 */ /* */... /**************************************************************************/ UINT _txe_semaphore_get(TX_SEMAPHORE *semaphore_ptr, ULONG wait_option) { UINT status; #ifndef TX_TIMER_PROCESS_IN_ISR TX_THREAD *current_thread; #endif /* Default status to success. */ status = TX_SUCCESS; /* Check for an invalid semaphore pointer. */ if (semaphore_ptr == TX_NULL) { /* Semaphore pointer is invalid, return appropriate error code. */ status = TX_SEMAPHORE_ERROR; }if (semaphore_ptr == TX_NULL) { ... } /* Now check for invalid semaphore ID. */ else if (semaphore_ptr -> tx_semaphore_id != TX_SEMAPHORE_ID) { /* Semaphore pointer is invalid, return appropriate error code. */ status = TX_SEMAPHORE_ERROR; }else if (semaphore_ptr -> tx_semaphore_id != TX_SEMAPHORE_ID) { ... } else { /* Check for a wait option error. Only threads are allowed any form of suspension. *//* ... */ if (wait_option != TX_NO_WAIT) { /* Is the call from an ISR or Initialization? */ if (TX_THREAD_GET_SYSTEM_STATE() != ((ULONG) 0)) { /* A non-thread is trying to suspend, return appropriate error code. */ status = TX_WAIT_ERROR; }if (TX_THREAD_GET_SYSTEM_STATE() != ((ULONG) 0)) { ... } #ifndef TX_TIMER_PROCESS_IN_ISR else { /* Pickup thread pointer. */ TX_THREAD_GET_CURRENT(current_thread) /* Is the current thread the timer thread? */ if (current_thread == &_tx_timer_thread) { /* A non-thread is trying to suspend, return appropriate error code. */ status = TX_WAIT_ERROR; }if (current_thread == &_tx_timer_thread) { ... } }else { ... } /* ... */#endif }if (wait_option != TX_NO_WAIT) { ... } }else { ... } /* Determine if everything is okay. */ if (status == TX_SUCCESS) { /* Call actual get semaphore function. */ status = _tx_semaphore_get(semaphore_ptr, wait_option); }if (status == TX_SUCCESS) { ... } /* Return completion status. */ return(status); }{ ... }
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