rtems/src/workspacegreedy.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSImplClassic
0007  *
0008  * @brief This source file contains the implementation of
0009  *   rtems_workspace_greedy_allocate(),
0010  *   rtems_workspace_greedy_allocate_all_except_largest(), and
0011  *   rtems_workspace_greedy_free().
0012  */
0013
0014 /*
0015  * Copyright (c) 2012 embedded brains GmbH & Co. KG
0016  *
0017  * Redistribution and use in source and binary forms, with or without
0018  * modification, are permitted provided that the following conditions
0019  * are met:
0020  * 1. Redistributions of source code must retain the above copyright
0021  *    notice, this list of conditions and the following disclaimer.
0022  * 2. Redistributions in binary form must reproduce the above copyright
0023  *    notice, this list of conditions and the following disclaimer in the
0024  *    documentation and/or other materials provided with the distribution.
0025  *
0026  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0027  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0028  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0029  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0030  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0031  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0032  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0033  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0034  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0035  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0036  * POSSIBILITY OF SUCH DAMAGE.
0037  */
0038
0039 #ifdef HAVE_CONFIG_H
0040 #include "config.h"
0041 #endif
0042
0043 #include <rtems/rtems/support.h>
0044 #include <rtems/score/apimutex.h>
0045 #include <rtems/score/heapimpl.h>
0046 #include <rtems/score/threaddispatch.h>
0047 #include <rtems/score/wkspace.h>
0048 #include <rtems/malloc.h>
0049
0050 #define SBRK_ALLOC_SIZE (128 * 1024UL * 1024UL)
0051
0052 void *rtems_workspace_greedy_allocate(
0053   const uintptr_t *block_sizes,
0054   size_t block_count
0055 )
0056 {
0057   Heap_Control *heap = &_Workspace_Area;
0058   void *opaque;
0059
0060   rtems_heap_sbrk_greedy_allocate( heap, SBRK_ALLOC_SIZE );
0061
0062   _RTEMS_Lock_allocator();
0063   opaque = _Heap_Greedy_allocate( heap, block_sizes, block_count );
0064   _RTEMS_Unlock_allocator();
0065
0066   return opaque;
0067 }
0068
0069 void *rtems_workspace_greedy_allocate_all_except_largest(
0070   uintptr_t *allocatable_size
0071 )
0072 {
0073   Heap_Control *heap = &_Workspace_Area;
0074   void *opaque;
0075
0076   rtems_heap_sbrk_greedy_allocate( heap, SBRK_ALLOC_SIZE );
0077
0078   _RTEMS_Lock_allocator();
0079   opaque = _Heap_Greedy_allocate_all_except_largest(
0080     heap,
0081     allocatable_size
0082   );
0083   _RTEMS_Unlock_allocator();
0084
0085   return opaque;
0086 }
0087
0088 void rtems_workspace_greedy_free( void *opaque )
0089 {
0090   _RTEMS_Lock_allocator();
0091   _Heap_Greedy_free( &_Workspace_Area, opaque );
0092   _RTEMS_Unlock_allocator();
0093 }