diff options
Diffstat (limited to 'common/src/txe_thread_preemption_change.c')
| -rw-r--r-- | common/src/txe_thread_preemption_change.c | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/common/src/txe_thread_preemption_change.c b/common/src/txe_thread_preemption_change.c new file mode 100644 index 00000000..d3cc4fd3 --- /dev/null +++ b/common/src/txe_thread_preemption_change.c @@ -0,0 +1,130 @@ +/**************************************************************************/ +/* */ +/* 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 */ +/** */ +/** Thread */ +/** */ +/**************************************************************************/ +/**************************************************************************/ + +#define TX_SOURCE_CODE + + +/* Include necessary system files. */ + +#include "tx_api.h" +#include "tx_thread.h" + + +/**************************************************************************/ +/* */ +/* FUNCTION RELEASE */ +/* */ +/* _txe_thread_preemption_change PORTABLE C */ +/* 6.0 */ +/* AUTHOR */ +/* */ +/* William E. Lamie, Microsoft Corporation */ +/* */ +/* DESCRIPTION */ +/* */ +/* This function checks for errors in the preemption threshold change */ +/* function call. */ +/* */ +/* INPUT */ +/* */ +/* thread_ptr Pointer to thread */ +/* new_threshold New preemption threshold */ +/* old_threshold Old preemption threshold */ +/* */ +/* OUTPUT */ +/* */ +/* TX_THREAD_ERROR Invalid thread pointer */ +/* TX_PTR_ERROR Invalid old threshold pointer */ +/* TX_CALLER_ERROR Invalid caller of function */ +/* status Actual completion status */ +/* */ +/* CALLS */ +/* */ +/* _tx_thread_preemption_change Actual preempt change function*/ +/* */ +/* CALLED BY */ +/* */ +/* Application Code */ +/* */ +/* RELEASE HISTORY */ +/* */ +/* DATE NAME DESCRIPTION */ +/* */ +/* 05-19-2020 William E. Lamie Initial Version 6.0 */ +/* */ +/**************************************************************************/ +UINT _txe_thread_preemption_change(TX_THREAD *thread_ptr, UINT new_threshold, UINT *old_threshold) +{ + +UINT status; + + + /* Check for an invalid thread pointer. */ + if (thread_ptr == TX_NULL) + { + + /* Thread pointer is invalid, return appropriate error code. */ + status = TX_THREAD_ERROR; + } + + /* Now check for invalid thread ID. */ + else if (thread_ptr -> tx_thread_id != TX_THREAD_ID) + { + + /* Thread pointer is invalid, return appropriate error code. */ + status = TX_THREAD_ERROR; + } + + /* Check for a valid old threshold pointer. */ + else if (old_threshold == TX_NULL) + { + + /* Invalid destination pointer, return appropriate error code. */ + status = TX_PTR_ERROR; + } + + /* Check for invalid caller of this function. */ + else if (TX_THREAD_GET_SYSTEM_STATE() != ((ULONG) 0)) + { + + /* Invalid caller of this function, return appropriate error code. */ + status = TX_CALLER_ERROR; + } + + /* Determine if the preemption-threshold is valid. */ + else if (new_threshold > thread_ptr -> tx_thread_user_priority) + { + + /* Return an error status. */ + status = TX_THRESH_ERROR; + } + else + { + + /* Call actual change thread preemption function. */ + status = _tx_thread_preemption_change(thread_ptr, new_threshold, old_threshold); + } + + /* Return completion status. */ + return(status); +} + |