112 lines
2.9 KiB
C
112 lines
2.9 KiB
C
/****************************************************************************
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* wireless/bluetooth/bt_atomic.c
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* Linux like atomic operations
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/spinlock.h>
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#include "bt_atomic.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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bt_atomic_t bt_atomic_incr(FAR bt_atomic_t *ptr)
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{
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irqstate_t flags;
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bt_atomic_t value;
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flags = spin_lock_irqsave(NULL);
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value = *ptr;
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*ptr = value + 1;
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spin_unlock_irqrestore(NULL, flags);
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return value;
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}
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bt_atomic_t bt_atomic_decr(FAR bt_atomic_t *ptr)
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{
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irqstate_t flags;
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bt_atomic_t value;
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flags = spin_lock_irqsave(NULL);
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value = *ptr;
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*ptr = value - 1;
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spin_unlock_irqrestore(NULL, flags);
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return value;
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}
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bt_atomic_t bt_atomic_setbit(FAR bt_atomic_t *ptr, bt_atomic_t bitno)
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{
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irqstate_t flags;
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bt_atomic_t value;
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flags = spin_lock_irqsave(NULL);
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value = *ptr;
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*ptr = value | (1 << bitno);
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spin_unlock_irqrestore(NULL, flags);
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return value;
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}
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bt_atomic_t bt_atomic_clrbit(FAR bt_atomic_t *ptr, bt_atomic_t bitno)
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{
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irqstate_t flags;
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bt_atomic_t value;
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flags = spin_lock_irqsave(NULL);
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value = *ptr;
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*ptr = value & ~(1 << bitno);
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spin_unlock_irqrestore(NULL, flags);
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return value;
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}
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bool bt_atomic_testsetbit(FAR bt_atomic_t *ptr, bt_atomic_t bitno)
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{
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irqstate_t flags;
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bt_atomic_t value;
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flags = spin_lock_irqsave(NULL);
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value = *ptr;
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*ptr = value | (1 << bitno);
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spin_unlock_irqrestore(NULL, flags);
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return (value & (1 << bitno)) != 0;
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}
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bool bt_atomic_testclrbit(FAR bt_atomic_t *ptr, bt_atomic_t bitno)
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{
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irqstate_t flags;
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bt_atomic_t value;
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flags = spin_lock_irqsave(NULL);
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value = *ptr;
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*ptr = value & ~(1 << bitno);
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spin_unlock_irqrestore(NULL, flags);
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return (value & (1 << bitno)) != 0;
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}
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