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Diffstat (limited to 'nuttx/mm/mm_user.c')
-rw-r--r-- | nuttx/mm/mm_user.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/nuttx/mm/mm_user.c b/nuttx/mm/mm_user.c new file mode 100644 index 000000000..ed5ba5eb9 --- /dev/null +++ b/nuttx/mm/mm_user.c @@ -0,0 +1,155 @@ +/************************************************************************ + * mm/mm_user.c + * + * Copyright (C) 2013 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * 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. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * 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. + * + ************************************************************************/ + +/************************************************************************ + * Included Files + ************************************************************************/ + +#include <nuttx/config.h> +#include <nuttx/mm.h> + +#if !defined(CONFIG_NUTTX_KERNEL) || !defined(__KERNEL__) + +/************************************************************************ + * Pre-processor definition + ************************************************************************/ + +/************************************************************************ + * Private Types + ************************************************************************/ + +/************************************************************************ + * Public Data + ************************************************************************/ + +/* This is the user heap */ + +struct mm_heap_s g_mmheap; + +/************************************************************************ + * Private Functions + ************************************************************************/ + +/************************************************************************ + * Public Functions + ************************************************************************/ + +/************************************************************************ + * Name: umm_initialize + * + * Description: + * This is a simple wrapper for the mm_initialize() function. This + * function is exported from the user-space blob so that the kernel + * can initialize the user-mode allocator. + * + * Parameters: + * heap_start - Address of the beginning of the (initial) memory region + * heap_size - The size (in bytes) if the (initial) memory region. + * + * Return Value: + * None + * + ************************************************************************/ + +void umm_initialize(FAR void *heap_start, size_t heap_size) +{ + mm_initialize(&g_mmheap, heap_start, heap_size); +} + +/************************************************************************ + * Name: umm_addregion + * + * Description: + * This is a simple wrapper for the mm_addregion() function. This + * function is exported from the user-space blob so that the kernel + * can initialize the user-mode allocator. + * + * Parameters: + * heap_start - Address of the beginning of the memory region + * heap_size - The size (in bytes) if the memory region. + * + * Return Value: + * None + * + ************************************************************************/ + +void umm_addregion(FAR void *heap_start, size_t heap_size) +{ + mm_addregion(&g_mmheap, heap_start, heap_size); +} + +/************************************************************************ + * Name: umm_trysemaphore + * + * Description: + * This is a simple wrapper for the mm_trysemaphore() function. This + * function is exported from the user-space blob so that the kernel + * can manage the user-mode allocator. + * + * Parameters: + * None + * + * Return Value: + * OK on success; a negated errno on failure + * + ************************************************************************/ + +int umm_trysemaphore(void) +{ + return mm_trysemaphore(&g_mmheap); +} + +/************************************************************************ + * Name: umm_givesemaphore + * + * Description: + * This is a simple wrapper for the mm_givesemaphore() function. This + * function is exported from the user-space blob so that the kernel + * can manage the user-mode allocator. + * + * Parameters: + * None + * + * Return Value: + * OK on success; a negated errno on failure + * + ************************************************************************/ + +void umm_givesemaphore(void) +{ + mm_givesemaphore(&g_mmheap); +} + +#endif /* !CONFIG_NUTTX_KERNEL || !__KERNEL__ */ |