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Diffstat (limited to 'common/src/tx_thread_reset.c')
| -rw-r--r-- | common/src/tx_thread_reset.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/common/src/tx_thread_reset.c b/common/src/tx_thread_reset.c new file mode 100644 index 00000000..5eca80d3 --- /dev/null +++ b/common/src/tx_thread_reset.c @@ -0,0 +1,163 @@ +/**************************************************************************/ +/* */ +/* 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_trace.h" +#include "tx_thread.h" + + +/**************************************************************************/ +/* */ +/* FUNCTION RELEASE */ +/* */ +/* _tx_thread_reset PORTABLE C */ +/* 6.0 */ +/* AUTHOR */ +/* */ +/* William E. Lamie, Microsoft Corporation */ +/* */ +/* DESCRIPTION */ +/* */ +/* This function prepares the thread to run again from the entry */ +/* point specified during thread creation. The application must */ +/* call tx_thread_resume after this call completes for the thread */ +/* to actually run. */ +/* */ +/* INPUT */ +/* */ +/* thread_ptr Pointer to thread to reset */ +/* */ +/* OUTPUT */ +/* */ +/* status Service return status */ +/* */ +/* CALLS */ +/* */ +/* _tx_thread_stack_build Build initial thread stack */ +/* */ +/* CALLED BY */ +/* */ +/* Application Code */ +/* */ +/* RELEASE HISTORY */ +/* */ +/* DATE NAME DESCRIPTION */ +/* */ +/* 05-19-2020 William E. Lamie Initial Version 6.0 */ +/* */ +/**************************************************************************/ +UINT _tx_thread_reset(TX_THREAD *thread_ptr) +{ + +TX_INTERRUPT_SAVE_AREA + +TX_THREAD *current_thread; +UINT status; + + + /* Default a successful completion status. */ + status = TX_SUCCESS; + + /* Disable interrupts. */ + TX_DISABLE + + /* Pickup thread pointer. */ + TX_THREAD_GET_CURRENT(current_thread) + + /* Check for a call from the current thread, which is not allowed! */ + if (current_thread == thread_ptr) + { + + /* Thread not completed or terminated - return an error! */ + status = TX_NOT_DONE; + } + else + { + + /* Check for proper status of this thread to reset. */ + if (thread_ptr -> tx_thread_state != TX_COMPLETED) + { + + /* Now check for terminated state. */ + if (thread_ptr -> tx_thread_state != TX_TERMINATED) + { + + /* Thread not completed or terminated - return an error! */ + status = TX_NOT_DONE; + } + } + } + + /* Is the request valid? */ + if (status == TX_SUCCESS) + { + + /* Modify the thread status to prevent additional reset calls. */ + thread_ptr -> tx_thread_state = TX_NOT_DONE; + + /* Execute Port-Specific completion processing. If needed, it is typically defined in tx_port.h. */ + TX_THREAD_RESET_PORT_COMPLETION(thread_ptr) + + /* Restore interrupts. */ + TX_RESTORE + +#ifndef TX_DISABLE_STACK_FILLING + + /* Set the thread stack to a pattern prior to creating the initial + stack frame. This pattern is used by the stack checking routines + to see how much has been used. */ + TX_MEMSET(thread_ptr -> tx_thread_stack_start, ((UCHAR) TX_STACK_FILL), thread_ptr -> tx_thread_stack_size); +#endif + + /* Call the target specific stack frame building routine to build the + thread's initial stack and to setup the actual stack pointer in the + control block. */ + _tx_thread_stack_build(thread_ptr, _tx_thread_shell_entry); + + /* Disable interrupts. */ + TX_DISABLE + + /* Finally, move into a suspended state to allow for the thread to be resumed. */ + thread_ptr -> tx_thread_state = TX_SUSPENDED; + + /* If trace is enabled, insert this event into the trace buffer. */ + TX_TRACE_IN_LINE_INSERT(TX_TRACE_THREAD_RESET, thread_ptr, thread_ptr -> tx_thread_state, 0, 0, TX_TRACE_THREAD_EVENTS) + + /* Log this kernel call. */ + TX_EL_THREAD_RESET_INSERT + + /* Log the thread status change. */ + TX_EL_THREAD_STATUS_CHANGE_INSERT(thread_ptr, TX_SUSPENDED) + } + + /* Restore interrupts. */ + TX_RESTORE + + /* Return completion status to caller. */ + return(status); +} + |