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Diffstat (limited to 'common/src/tx_timer_system_activate.c')
| -rw-r--r-- | common/src/tx_timer_system_activate.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/common/src/tx_timer_system_activate.c b/common/src/tx_timer_system_activate.c new file mode 100644 index 00000000..a4b844d3 --- /dev/null +++ b/common/src/tx_timer_system_activate.c @@ -0,0 +1,164 @@ +/**************************************************************************/ +/* */ +/* 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_timer.h" + + +/**************************************************************************/ +/* */ +/* FUNCTION RELEASE */ +/* */ +/* _tx_timer_system_activate PORTABLE C */ +/* 6.0 */ +/* AUTHOR */ +/* */ +/* William E. Lamie, Microsoft Corporation */ +/* */ +/* DESCRIPTION */ +/* */ +/* This function places the specified internal timer in the proper */ +/* place in the timer expiration list. If the timer is already active */ +/* this function does nothing. */ +/* */ +/* INPUT */ +/* */ +/* timer_ptr Pointer to timer control block */ +/* */ +/* OUTPUT */ +/* */ +/* TX_SUCCESS Always returns success */ +/* */ +/* CALLS */ +/* */ +/* None */ +/* */ +/* CALLED BY */ +/* */ +/* _tx_thread_system_suspend Thread suspend function */ +/* _tx_thread_system_ni_suspend Non-interruptable suspend thread */ +/* _tx_timer_thread_entry Timer thread processing */ +/* _tx_timer_activate Application timer activate */ +/* */ +/* RELEASE HISTORY */ +/* */ +/* DATE NAME DESCRIPTION */ +/* */ +/* 05-19-2020 William E. Lamie Initial Version 6.0 */ +/* */ +/**************************************************************************/ +VOID _tx_timer_system_activate(TX_TIMER_INTERNAL *timer_ptr) +{ + +TX_TIMER_INTERNAL **timer_list; +TX_TIMER_INTERNAL *next_timer; +TX_TIMER_INTERNAL *previous_timer; +ULONG delta; +ULONG remaining_ticks; +ULONG expiration_time; + + + /* Pickup the remaining ticks. */ + remaining_ticks = timer_ptr -> tx_timer_internal_remaining_ticks; + + /* Determine if there is a timer to activate. */ + if (remaining_ticks != ((ULONG) 0)) + { + + /* Determine if the timer is set to wait forever. */ + if (remaining_ticks != TX_WAIT_FOREVER) + { + + /* Valid timer activate request. */ + + /* Determine if the timer still needs activation. */ + if (timer_ptr -> tx_timer_internal_list_head == TX_NULL) + { + + /* Activate the timer. */ + + /* Calculate the amount of time remaining for the timer. */ + if (remaining_ticks > TX_TIMER_ENTRIES) + { + + /* Set expiration time to the maximum number of entries. */ + expiration_time = TX_TIMER_ENTRIES - ((ULONG) 1); + } + else + { + + /* Timer value fits in the timer entries. */ + + /* Set the expiration time. */ + expiration_time = (remaining_ticks - ((ULONG) 1)); + } + + /* At this point, we are ready to put the timer on one of + the timer lists. */ + + /* Calculate the proper place for the timer. */ + timer_list = TX_TIMER_POINTER_ADD(_tx_timer_current_ptr, expiration_time); + if (TX_TIMER_INDIRECT_TO_VOID_POINTER_CONVERT(timer_list) >= TX_TIMER_INDIRECT_TO_VOID_POINTER_CONVERT(_tx_timer_list_end)) + { + + /* Wrap from the beginning of the list. */ + delta = TX_TIMER_POINTER_DIF(timer_list, _tx_timer_list_end); + timer_list = TX_TIMER_POINTER_ADD(_tx_timer_list_start, delta); + } + + /* Now put the timer on this list. */ + if ((*timer_list) == TX_NULL) + { + + /* This list is NULL, just put the new timer on it. */ + + /* Setup the links in this timer. */ + timer_ptr -> tx_timer_internal_active_next = timer_ptr; + timer_ptr -> tx_timer_internal_active_previous = timer_ptr; + + /* Setup the list head pointer. */ + *timer_list = timer_ptr; + } + else + { + + /* This list is not NULL, add current timer to the end. */ + next_timer = *timer_list; + previous_timer = next_timer -> tx_timer_internal_active_previous; + previous_timer -> tx_timer_internal_active_next = timer_ptr; + next_timer -> tx_timer_internal_active_previous = timer_ptr; + timer_ptr -> tx_timer_internal_active_next = next_timer; + timer_ptr -> tx_timer_internal_active_previous = previous_timer; + } + + /* Setup list head pointer. */ + timer_ptr -> tx_timer_internal_list_head = timer_list; + } + } + } +} + |