124 lines
4.7 KiB
C
124 lines
4.7 KiB
C
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//*****************************************************************************
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//
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// am_hal_queue.h
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//! @file
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//!
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//! @brief Functions for implementing a queue system.
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//!
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//! @addtogroup Miscellaneous2 Software Features (MISC)
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//! @ingroup apollo2hal
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//! @{
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//
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//*****************************************************************************
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//*****************************************************************************
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//
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// Copyright (c) 2017, Ambiq Micro
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its
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// contributors may be used to endorse or promote products derived from this
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// software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// This is part of revision 1.2.9 of the AmbiqSuite Development Package.
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//
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//*****************************************************************************
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#ifndef AM_HAL_QUEUE_H
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#define AM_HAL_QUEUE_H
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//*****************************************************************************
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//
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//! @brief A data structure that will operate as a queue.
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//!
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//! This data structure holds information necessary for operating a thread-safe
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//! queue. When declaring a structure of type am_hal_queue_t, you will also need
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//! to provide some working memory for the queue to use. For more information on
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//! setting up and using the am_hal_queue_t structure, please see the
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//! documentation for am_hal_queue_init().
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//
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//*****************************************************************************
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typedef struct
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{
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uint32_t ui32WriteIndex;
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uint32_t ui32ReadIndex;
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uint32_t ui32Length;
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uint32_t ui32Capacity;
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uint32_t ui32ItemSize;
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uint8_t *pui8Data;
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}
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am_hal_queue_t;
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//*****************************************************************************
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//
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// Function-like macros.
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//
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//*****************************************************************************
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#define am_hal_queue_empty(psQueue) \
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((psQueue)->ui32Length == 0)
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#define am_hal_queue_full(psQueue) \
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((psQueue)->ui32Length == (psQueue)->ui32Capacity)
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#define am_hal_queue_space_left(psQueue) \
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((psQueue)->ui32Capacity - (psQueue)->ui32Length)
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#define am_hal_queue_data_left(psQueue) \
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((psQueue)->ui32Length)
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//*****************************************************************************
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//
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// Use this to make sure you get the size parameters right.
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//
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//*****************************************************************************
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#define am_hal_queue_from_array(queue, array) \
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am_hal_queue_init((queue), (array), sizeof((array)[0]), sizeof(array))
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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//*****************************************************************************
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//
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// External function definitions.
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//
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//*****************************************************************************
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extern void am_hal_queue_init(am_hal_queue_t *psQueue, void *pvData, uint32_t ui32ItemSize, uint32_t ui32ArraySize);
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extern bool am_hal_queue_item_add(am_hal_queue_t *psQueue, const void *pvSource, uint32_t ui32NumItems);
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extern bool am_hal_queue_item_get(am_hal_queue_t *psQueue, void *pvDest, uint32_t ui32NumItems);
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#ifdef __cplusplus
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}
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#endif
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#endif // AM_HAL_QUEUE_H
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//*****************************************************************************
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//
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// End Doxygen group.
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//! @}
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//
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//*****************************************************************************
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