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								Middlewares/ST/threadx/common/src/txe_timer_create.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                                                     */ | ||||
| /**                                                                       */ | ||||
| /**   Timer                                                               */ | ||||
| /**                                                                       */ | ||||
| /**************************************************************************/ | ||||
| /**************************************************************************/ | ||||
|  | ||||
| #define TX_SOURCE_CODE | ||||
|  | ||||
|  | ||||
| /* Include necessary system files.  */ | ||||
|  | ||||
| #include "tx_api.h" | ||||
| #include "tx_initialize.h" | ||||
| #include "tx_thread.h" | ||||
| #include "tx_timer.h" | ||||
|  | ||||
|  | ||||
| /**************************************************************************/ | ||||
| /*                                                                        */ | ||||
| /*  FUNCTION                                               RELEASE        */ | ||||
| /*                                                                        */ | ||||
| /*    _txe_timer_create                                   PORTABLE C      */ | ||||
| /*                                                           6.1          */ | ||||
| /*  AUTHOR                                                                */ | ||||
| /*                                                                        */ | ||||
| /*    William E. Lamie, Microsoft Corporation                             */ | ||||
| /*                                                                        */ | ||||
| /*  DESCRIPTION                                                           */ | ||||
| /*                                                                        */ | ||||
| /*    This function checks for errors in the create application timer     */ | ||||
| /*    function call.                                                      */ | ||||
| /*                                                                        */ | ||||
| /*  INPUT                                                                 */ | ||||
| /*                                                                        */ | ||||
| /*    timer_ptr                         Pointer to timer control block    */ | ||||
| /*    name_ptr                          Pointer to timer name             */ | ||||
| /*    expiration_function               Application expiration function   */ | ||||
| /*    initial_ticks                     Initial expiration ticks          */ | ||||
| /*    reschedule_ticks                  Reschedule ticks                  */ | ||||
| /*    auto_activate                     Automatic activation flag         */ | ||||
| /*    timer_control_block_size          Size of timer control block       */ | ||||
| /*                                                                        */ | ||||
| /*  OUTPUT                                                                */ | ||||
| /*                                                                        */ | ||||
| /*    TX_TIMER_ERROR                    Invalid timer control block       */ | ||||
| /*    TX_TICK_ERROR                     Invalid initial expiration count  */ | ||||
| /*    TX_ACTIVATE_ERROR                 Invalid timer activation option   */ | ||||
| /*    TX_CALLER_ERROR                   Invalid caller of this function   */ | ||||
| /*    status                            Actual completion status          */ | ||||
| /*                                                                        */ | ||||
| /*  CALLS                                                                 */ | ||||
| /*                                                                        */ | ||||
| /*    _tx_thread_system_preempt_check   Check for preemption              */ | ||||
| /*    _tx_timer_create                  Actual timer create 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_timer_create(TX_TIMER *timer_ptr, CHAR *name_ptr, | ||||
|             VOID (*expiration_function)(ULONG id), ULONG expiration_input, | ||||
|             ULONG initial_ticks, ULONG reschedule_ticks, UINT auto_activate, UINT timer_control_block_size) | ||||
| { | ||||
|  | ||||
| TX_INTERRUPT_SAVE_AREA | ||||
|  | ||||
| UINT            status; | ||||
| ULONG           i; | ||||
| TX_TIMER        *next_timer; | ||||
| #ifndef TX_TIMER_PROCESS_IN_ISR | ||||
| TX_THREAD       *thread_ptr; | ||||
| #endif | ||||
|  | ||||
|  | ||||
|     /* Default status to success.  */ | ||||
|     status =  TX_SUCCESS; | ||||
|  | ||||
|     /* Check for a NULL timer pointer.  */ | ||||
|     if (timer_ptr == TX_NULL) | ||||
|     { | ||||
|  | ||||
|         /* Timer pointer is invalid, return appropriate error code.  */ | ||||
|         status =  TX_TIMER_ERROR; | ||||
|     } | ||||
|  | ||||
|     /* Now check for invalid control block size.  */ | ||||
|     else if (timer_control_block_size != (sizeof(TX_TIMER))) | ||||
|     { | ||||
|  | ||||
|         /* Timer pointer is invalid, return appropriate error code.  */ | ||||
|         status =  TX_TIMER_ERROR; | ||||
|     } | ||||
|     else | ||||
|     { | ||||
|  | ||||
|         /* Disable interrupts.  */ | ||||
|         TX_DISABLE | ||||
|  | ||||
|         /* Increment the preempt disable flag.  */ | ||||
|         _tx_thread_preempt_disable++; | ||||
|  | ||||
|         /* Restore interrupts.  */ | ||||
|         TX_RESTORE | ||||
|  | ||||
|         /* Next see if it is already in the created list.  */ | ||||
|         next_timer =  _tx_timer_created_ptr; | ||||
|         for (i = ((ULONG) 0); i < _tx_timer_created_count; i++) | ||||
|         { | ||||
|  | ||||
|             /* Determine if this timer matches the current timer in the list.  */ | ||||
|             if (timer_ptr == next_timer) | ||||
|             { | ||||
|  | ||||
|                 break; | ||||
|             } | ||||
|             else | ||||
|             { | ||||
|  | ||||
|                 /* Move to next timer.  */ | ||||
|                 next_timer =  next_timer -> tx_timer_created_next; | ||||
|             } | ||||
|         } | ||||
|  | ||||
|         /* Disable interrupts.  */ | ||||
|         TX_DISABLE | ||||
|  | ||||
|         /* Decrement the preempt disable flag.  */ | ||||
|         _tx_thread_preempt_disable--; | ||||
|  | ||||
|         /* Restore interrupts.  */ | ||||
|         TX_RESTORE | ||||
|  | ||||
|         /* Check for preemption.  */ | ||||
|         _tx_thread_system_preempt_check(); | ||||
|  | ||||
|         /* At this point, check to see if there is a duplicate timer.  */ | ||||
|         if (timer_ptr == next_timer) | ||||
|         { | ||||
|  | ||||
|             /* Timer is already created, return appropriate error code.  */ | ||||
|             status =  TX_TIMER_ERROR; | ||||
|         } | ||||
|  | ||||
|         /* Check for an illegal initial tick value.  */ | ||||
|         else if (initial_ticks == ((ULONG) 0)) | ||||
|         { | ||||
|  | ||||
|             /* Invalid initial tick value, return appropriate error code.  */ | ||||
|             status =  TX_TICK_ERROR; | ||||
|         } | ||||
|         else | ||||
|         { | ||||
|  | ||||
|             /* Check for an illegal activation.  */ | ||||
|             if (auto_activate != TX_AUTO_ACTIVATE) | ||||
|             { | ||||
|  | ||||
|                 /* And activation is not the other value.  */ | ||||
|                 if (auto_activate != TX_NO_ACTIVATE) | ||||
|                 { | ||||
|  | ||||
|                     /* Invalid activation selected, return appropriate error code.  */ | ||||
|                     status =  TX_ACTIVATE_ERROR; | ||||
|                 } | ||||
|             } | ||||
|         } | ||||
|     } | ||||
|  | ||||
|     /* Determine if everything is okay.  */ | ||||
|     if (status == TX_SUCCESS) | ||||
|     { | ||||
|  | ||||
| #ifndef TX_TIMER_PROCESS_IN_ISR | ||||
|  | ||||
|         /* Pickup thread pointer.  */ | ||||
|         TX_THREAD_GET_CURRENT(thread_ptr) | ||||
|  | ||||
|         /* Check for invalid caller of this function.  First check for a calling thread.  */ | ||||
|         if (thread_ptr == &_tx_timer_thread) | ||||
|         { | ||||
|  | ||||
|             /* Invalid caller of this function, return appropriate error code.  */ | ||||
|             status =  TX_CALLER_ERROR; | ||||
|         } | ||||
| #endif | ||||
|  | ||||
|         /* Check for interrupt call.  */ | ||||
|         if (TX_THREAD_GET_SYSTEM_STATE() != ((ULONG) 0)) | ||||
|         { | ||||
|  | ||||
|             /* Now, make sure the call is from an interrupt and not initialization.  */ | ||||
|             if (TX_THREAD_GET_SYSTEM_STATE() < TX_INITIALIZE_IN_PROGRESS) | ||||
|             { | ||||
|  | ||||
|                 /* Invalid caller of this function, return appropriate error code.  */ | ||||
|                 status =  TX_CALLER_ERROR; | ||||
|             } | ||||
|         } | ||||
|     } | ||||
|  | ||||
|  | ||||
|     /* Determine if everything is okay.  */ | ||||
|     if (status == TX_SUCCESS) | ||||
|     { | ||||
|  | ||||
|         /* Call actual application timer create function.  */ | ||||
|         status =  _tx_timer_create(timer_ptr, name_ptr, expiration_function, expiration_input, | ||||
|                                                     initial_ticks, reschedule_ticks, auto_activate); | ||||
|     } | ||||
|  | ||||
|     /* Return completion status.  */ | ||||
|     return(status); | ||||
| } | ||||
|  | ||||
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