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Diffstat (limited to 'cpukit/include/rtems/mallocinitone.h')
-rw-r--r-- | cpukit/include/rtems/mallocinitone.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/cpukit/include/rtems/mallocinitone.h b/cpukit/include/rtems/mallocinitone.h new file mode 100644 index 0000000000..7ad13e3804 --- /dev/null +++ b/cpukit/include/rtems/mallocinitone.h @@ -0,0 +1,90 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ + +/** + * @file + * + * @ingroup MallocSupport + * + * @brief This header file provides the implementation of + * _Malloc_Initialize_for_one_area(). + */ + +/* + * 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_MALLOCINITONE_H +#define _RTEMS_MALLOCINITONE_H + +#include <rtems/malloc.h> +#include <rtems/score/assert.h> +#include <rtems/score/heapimpl.h> + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * @ingroup MallocSupport + * + * @brief Initializes the separate C Program Heap with support for exactly one + * memory area. + * + * This implementation should be used by BSPs which provide exactly one memory + * area via _Memory_Get() to implement _Workspace_Malloc_initialize_separate(). + */ +static inline Heap_Control *_Malloc_Initialize_for_one_area( + Heap_Control *heap +) +{ + const Memory_Information *mem; + Memory_Area *area; + uintptr_t space_available; + + mem = _Memory_Get(); + _Assert( _Memory_Get_count( mem ) == 1 ); + + RTEMS_Malloc_Heap = heap; + area = _Memory_Get_area( mem, 0 ); + space_available = _Heap_Initialize( + heap, + _Memory_Get_free_begin( area ), + _Memory_Get_free_size( area ), + CPU_HEAP_ALIGNMENT + ); + + if ( space_available > 0 ) { + _Memory_Consume( area, _Memory_Get_free_size( area ) ); + } else { + _Internal_error( INTERNAL_ERROR_NO_MEMORY_FOR_HEAP ); + } + + return heap; +} + +#ifdef __cplusplus +} +#endif + +#endif /* _RTEMS_MALLOCINITONE_H */ |