diff options
Diffstat (limited to 'tmk_core/protocol/midi/bytequeue/bytequeue.c')
| -rw-r--r--[-rwxr-xr-x] | tmk_core/protocol/midi/bytequeue/bytequeue.c | 93 |
1 files changed, 45 insertions, 48 deletions
diff --git a/tmk_core/protocol/midi/bytequeue/bytequeue.c b/tmk_core/protocol/midi/bytequeue/bytequeue.c index e434956328..e36a9e66b1 100755..100644 --- a/tmk_core/protocol/midi/bytequeue/bytequeue.c +++ b/tmk_core/protocol/midi/bytequeue/bytequeue.c @@ -1,65 +1,62 @@ -//this is a single reader [maybe multiple writer?] byte queue -//Copyright 2008 Alex Norman -//writen by Alex Norman +// this is a single reader [maybe multiple writer?] byte queue +// Copyright 2008 Alex Norman +// writen by Alex Norman // -//This file is part of avr-bytequeue. +// This file is part of avr-bytequeue. // -//avr-bytequeue is free software: you can redistribute it and/or modify -//it under the terms of the GNU General Public License as published by -//the Free Software Foundation, either version 3 of the License, or +// avr-bytequeue is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or //(at your option) any later version. // -//avr-bytequeue is distributed in the hope that it will be useful, -//but WITHOUT ANY WARRANTY; without even the implied warranty of -//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -//GNU General Public License for more details. +// avr-bytequeue is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. // -//You should have received a copy of the GNU General Public License -//along with avr-bytequeue. If not, see <http://www.gnu.org/licenses/>. +// You should have received a copy of the GNU General Public License +// along with avr-bytequeue. If not, see <http://www.gnu.org/licenses/>. #include "bytequeue.h" #include "interrupt_setting.h" -void bytequeue_init(byteQueue_t * queue, uint8_t * dataArray, byteQueueIndex_t arrayLen){ - queue->length = arrayLen; - queue->data = dataArray; - queue->start = queue->end = 0; +void bytequeue_init(byteQueue_t* queue, uint8_t* dataArray, byteQueueIndex_t arrayLen) { + queue->length = arrayLen; + queue->data = dataArray; + queue->start = queue->end = 0; } -bool bytequeue_enqueue(byteQueue_t * queue, uint8_t item){ - interrupt_setting_t setting = store_and_clear_interrupt(); - //full - if(((queue->end + 1) % queue->length) == queue->start){ - restore_interrupt_setting(setting); - return false; - } else { - queue->data[queue->end] = item; - queue->end = (queue->end + 1) % queue->length; - restore_interrupt_setting(setting); - return true; - } +bool bytequeue_enqueue(byteQueue_t* queue, uint8_t item) { + interrupt_setting_t setting = store_and_clear_interrupt(); + // full + if (((queue->end + 1) % queue->length) == queue->start) { + restore_interrupt_setting(setting); + return false; + } else { + queue->data[queue->end] = item; + queue->end = (queue->end + 1) % queue->length; + restore_interrupt_setting(setting); + return true; + } } -byteQueueIndex_t bytequeue_length(byteQueue_t * queue){ - byteQueueIndex_t len; - interrupt_setting_t setting = store_and_clear_interrupt(); - if(queue->end >= queue->start) - len = queue->end - queue->start; - else - len = (queue->length - queue->start) + queue->end; - restore_interrupt_setting(setting); - return len; +byteQueueIndex_t bytequeue_length(byteQueue_t* queue) { + byteQueueIndex_t len; + interrupt_setting_t setting = store_and_clear_interrupt(); + if (queue->end >= queue->start) + len = queue->end - queue->start; + else + len = (queue->length - queue->start) + queue->end; + restore_interrupt_setting(setting); + return len; } -//we don't need to avoid interrupts if there is only one reader -uint8_t bytequeue_get(byteQueue_t * queue, byteQueueIndex_t index){ - return queue->data[(queue->start + index) % queue->length]; -} +// we don't need to avoid interrupts if there is only one reader +uint8_t bytequeue_get(byteQueue_t* queue, byteQueueIndex_t index) { return queue->data[(queue->start + index) % queue->length]; } -//we just update the start index to remove elements -void bytequeue_remove(byteQueue_t * queue, byteQueueIndex_t numToRemove){ - interrupt_setting_t setting = store_and_clear_interrupt(); - queue->start = (queue->start + numToRemove) % queue->length; - restore_interrupt_setting(setting); +// we just update the start index to remove elements +void bytequeue_remove(byteQueue_t* queue, byteQueueIndex_t numToRemove) { + interrupt_setting_t setting = store_and_clear_interrupt(); + queue->start = (queue->start + numToRemove) % queue->length; + restore_interrupt_setting(setting); } - |