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-rw-r--r-- | cpukit/include/rtems/mallocinitmulti.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/cpukit/include/rtems/mallocinitmulti.h b/cpukit/include/rtems/mallocinitmulti.h new file mode 100644 index 0000000000..ba9cf6830c --- /dev/null +++ b/cpukit/include/rtems/mallocinitmulti.h @@ -0,0 +1,100 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ + +/** + * @file + * + * @ingroup MallocSupport + * + * @brief This header file provides the implementation of + * _Malloc_Initialize_for_multiple_areas(). + */ + +/* + * Copyright (C) 2012, 2020 embedded brains GmbH & Co. KG + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _RTEMS_MALLOCINITMULTI_H +#define _RTEMS_MALLOCINITMULTI_H + +#include <rtems/malloc.h> +#include <rtems/score/heapimpl.h> + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * @ingroup MallocSupport + * + * @brief Initializes the separate C Program Heap with support for more than + * one memory area. + * + * This implementation should be used by BSPs which provide more than one + * memory area via _Memory_Get() to implement + * _Workspace_Malloc_initialize_separate(). + */ +static inline Heap_Control *_Malloc_Initialize_for_multiple_areas( + Heap_Control *heap +) +{ + const Memory_Information *mem; + Heap_Initialization_or_extend_handler init_or_extend; + uintptr_t page_size; + size_t i; + + mem = _Memory_Get(); + RTEMS_Malloc_Heap = heap; + init_or_extend = _Heap_Initialize; + page_size = CPU_HEAP_ALIGNMENT; + + for (i = 0; i < _Memory_Get_count( mem ); ++i) { + Memory_Area *area; + uintptr_t space_available; + + area = _Memory_Get_area( mem, i ); + space_available = ( *init_or_extend )( + heap, + _Memory_Get_free_begin( area ), + _Memory_Get_free_size( area ), + page_size + ); + + if ( space_available > 0 ) { + _Memory_Consume( area, _Memory_Get_free_size( area ) ); + init_or_extend = _Heap_Extend; + } + } + + if ( init_or_extend == _Heap_Initialize ) { + _Internal_error( INTERNAL_ERROR_NO_MEMORY_FOR_HEAP ); + } + + return heap; +} + +#ifdef __cplusplus +} +#endif + +#endif /* _RTEMS_MALLOCINITMULTI_H */ |