718cf2ccb9
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
191 lines
6.2 KiB
C
191 lines
6.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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*
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* BSD LICENSE
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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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
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/**
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* @file
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*
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* @brief This file contains the interface to the pool class.
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* This class allows two different two different priority tasks to
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* insert and remove items from the free pool. The user of the pool
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* is expected to evaluate the pool condition empty before a get
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* operation and pool condition full before a put operation.
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* Methods Provided:
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* - sci_pool_create()
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* - sci_pool_initialize()
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* - sci_pool_empty()
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* - sci_pool_full()
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* - sci_pool_get()
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* - sci_pool_put()
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*/
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#ifndef _SCI_POOL_H_
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#define _SCI_POOL_H_
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#include <dev/isci/types.h>
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/**
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* Private operation for the pool
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*/
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#define SCI_POOL_INCREMENT(this_pool, index) \
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(((index) + 1) == (this_pool).size ? 0 : (index) + 1)
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/**
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* This creates a pool structure of pool_name. The members in the pool are
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* of type with number of elements equal to size.
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*/
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#define SCI_POOL_CREATE(pool_name, type, pool_size) \
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struct \
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{ \
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U32 size; \
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U32 get; \
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U32 put; \
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type array[(pool_size) + 1]; \
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} pool_name
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/**
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* This macro evaluates the pool and returns TRUE if the pool is empty.
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* If the pool is empty the user should not perform any get operation on
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* the pool.
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*/
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#define sci_pool_empty(this_pool) \
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((this_pool).get == (this_pool).put)
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/**
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* This macro evaluates the pool and returns TRUE if the pool is full. If
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* the pool is full the user should not perform any put operation.
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*/
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#define sci_pool_full(this_pool) \
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(SCI_POOL_INCREMENT(this_pool, (this_pool).put) == (this_pool).get)
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/**
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* This macro returns the size of the pool created. The internal size
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* of the pool is actually 1 larger then necessary in order to ensure
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* get and put pointers can be written simultaneously by different
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* users. As a result, this macro subtracts 1 from the internal size
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*/
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#define sci_pool_size(this_pool) \
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((this_pool).size - 1)
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/**
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* This macro indicates the number of elements currently contained in the
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* pool.
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*/
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#define sci_pool_count(this_pool) \
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( \
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sci_pool_empty((this_pool)) \
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? 0 \
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: ( \
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sci_pool_full((this_pool)) \
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? sci_pool_size((this_pool)) \
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: ( \
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(this_pool).get > (this_pool).put \
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? ((this_pool).size - (this_pool).get + (this_pool).put) \
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: ((this_pool).put - (this_pool).get) \
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) \
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) \
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)
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/**
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* This macro initializes the pool to an empty condition.
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*/
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#define sci_pool_initialize(this_pool) \
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{ \
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(this_pool).size = (sizeof((this_pool).array) / sizeof((this_pool).array[0])); \
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(this_pool).get = 0; \
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(this_pool).put = 0; \
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}
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/**
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* This macro will get the next free element from the pool.
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* This should only be called if the pool is not empty.
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*/
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#define sci_pool_get(this_pool, my_value) \
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{ \
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(my_value) = (this_pool).array[(this_pool).get]; \
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(this_pool).get = SCI_POOL_INCREMENT((this_pool), (this_pool).get); \
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}
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/**
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* This macro will put the value into the pool.
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* This should only be called if the pool is not full.
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*/
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#define sci_pool_put(this_pool, the_value) \
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{ \
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(this_pool).array[(this_pool).put] = (the_value); \
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(this_pool).put = SCI_POOL_INCREMENT((this_pool), (this_pool).put); \
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}
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/**
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* This macro will search the pool and remove any elements in the pool
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* matching the supplied value.
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* @note This method can only be utilized on pools
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*/
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#define sci_pool_erase(this_pool, type, the_value) \
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{ \
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type tmp_value; \
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U32 index; \
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U32 element_count = sci_pool_count((this_pool)); \
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\
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for (index = 0; index < element_count; index++) \
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{ \
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sci_pool_get((this_pool), tmp_value); \
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if (tmp_value != (the_value)) \
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sci_pool_put((this_pool), tmp_value); \
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} \
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}
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#endif // _SCI_POOL_H_
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