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/************************************************************************
* 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 <assert.h>
#include <nuttx/mm.h>
#ifdef CONFIG_MM_USER_HEAP
/************************************************************************
* 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_MM_USER_HEAP */
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