1 /*************************************************************************** 2 * Copyright (c) 2024 Microsoft Corporation 3 * 4 * This program and the accompanying materials are made available under the 5 * terms of the MIT License which is available at 6 * https://opensource.org/licenses/MIT. 7 * 8 * SPDX-License-Identifier: MIT 9 **************************************************************************/ 10 11 12 /**************************************************************************/ 13 /**************************************************************************/ 14 /** */ 15 /** ThreadX Component */ 16 /** */ 17 /** Semaphore */ 18 /** */ 19 /**************************************************************************/ 20 /**************************************************************************/ 21 22 #define TX_SOURCE_CODE 23 24 25 /* Include necessary system files. */ 26 27 #include "tx_api.h" 28 #include "tx_thread.h" 29 #include "tx_timer.h" 30 #include "tx_semaphore.h" 31 32 33 /**************************************************************************/ 34 /* */ 35 /* FUNCTION RELEASE */ 36 /* */ 37 /* _txe_semaphore_delete PORTABLE C */ 38 /* 6.1 */ 39 /* AUTHOR */ 40 /* */ 41 /* William E. Lamie, Microsoft Corporation */ 42 /* */ 43 /* DESCRIPTION */ 44 /* */ 45 /* This function checks for errors in the semaphore delete function */ 46 /* call. */ 47 /* */ 48 /* INPUT */ 49 /* */ 50 /* semaphore_ptr Pointer to semaphore control block*/ 51 /* */ 52 /* OUTPUT */ 53 /* */ 54 /* TX_SEMAPHORE_ERROR Invalid semaphore pointer */ 55 /* TX_CALLER_ERROR Invalid caller of this function */ 56 /* status Actual completion status */ 57 /* */ 58 /* CALLS */ 59 /* */ 60 /* _tx_semaphore_delete Actual delete semaphore function */ 61 /* */ 62 /* CALLED BY */ 63 /* */ 64 /* Application Code */ 65 /* */ 66 /* RELEASE HISTORY */ 67 /* */ 68 /* DATE NAME DESCRIPTION */ 69 /* */ 70 /* 05-19-2020 William E. Lamie Initial Version 6.0 */ 71 /* 09-30-2020 Yuxin Zhou Modified comment(s), */ 72 /* resulting in version 6.1 */ 73 /* */ 74 /**************************************************************************/ _txe_semaphore_delete(TX_SEMAPHORE * semaphore_ptr)75UINT _txe_semaphore_delete(TX_SEMAPHORE *semaphore_ptr) 76 { 77 78 UINT status; 79 #ifndef TX_TIMER_PROCESS_IN_ISR 80 TX_THREAD *thread_ptr; 81 #endif 82 83 84 /* Default status to success. */ 85 status = TX_SUCCESS; 86 87 /* Check for an invalid semaphore pointer. */ 88 if (semaphore_ptr == TX_NULL) 89 { 90 91 /* Semaphore pointer is invalid, return appropriate error code. */ 92 status = TX_SEMAPHORE_ERROR; 93 } 94 95 /* Now check for invalid semaphore ID. */ 96 else if (semaphore_ptr -> tx_semaphore_id != TX_SEMAPHORE_ID) 97 { 98 99 /* Semaphore pointer is invalid, return appropriate error code. */ 100 status = TX_SEMAPHORE_ERROR; 101 } 102 else 103 { 104 105 /* Check for invalid caller of this function. */ 106 107 /* Is the caller an ISR or Initialization? */ 108 if (TX_THREAD_GET_SYSTEM_STATE() != ((ULONG) 0)) 109 { 110 111 /* Invalid caller of this function, return appropriate error code. */ 112 status = TX_CALLER_ERROR; 113 } 114 115 #ifndef TX_TIMER_PROCESS_IN_ISR 116 else 117 { 118 119 /* Pickup thread pointer. */ 120 TX_THREAD_GET_CURRENT(thread_ptr) 121 122 /* Is the caller the system timer thread? */ 123 if (thread_ptr == &_tx_timer_thread) 124 { 125 126 /* Invalid caller of this function, return appropriate error code. */ 127 status = TX_CALLER_ERROR; 128 } 129 } 130 #endif 131 } 132 133 /* Determine if everything is okay. */ 134 if (status == TX_SUCCESS) 135 { 136 137 /* Call actual semaphore delete function. */ 138 status = _tx_semaphore_delete(semaphore_ptr); 139 } 140 141 /* Return completion status. */ 142 return(status); 143 } 144 145
