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incubator-nuttx/mm/umm_heap/umm_sem.c

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Standardize the width of all comment boxes in C files
2015-10-03 07:43:18 +08:00
/****************************************************************************
Move the user heap allocator front-end from mm/. to mm/umm_heap/.
2014-09-23 00:48:58 +08:00
* mm/umm_heap/umm_sem.c
With these fixes, the kernel build is basically functional (but there is more to be done) git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5722 42af7a65-404d-4744-a932-0658087f49c3
2013-03-09 09:27:42 +08:00
*
Protected mode: Redesign how the user space heap is accessed from the kernel code. It used to call memory management functions in user space via function pointers in the userspace interface. That is inefficient because the first thing that those memory management functions do is to trap back into the kernel to get the current PID. Worse, that operation can be fatal is certain fragile situations such as when a task is exitting. The solution is to remove all of the memory management function calls from the interface. Instead, the interface exports the userspace heap structure and then kernel size implementations of those memory management functions will operate on the userspace heap structure. This avoids the unnecessary system calls and, more importantly, failures do to freeing memory when a test exits.
2015-07-10 22:37:02 +08:00
* Copyright (C) 2013-2015 Gregory Nutt. All rights reserved.
With these fixes, the kernel build is basically functional (but there is more to be done) git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5722 42af7a65-404d-4744-a932-0658087f49c3
2013-03-09 09:27:42 +08:00
* 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.
*
Standardize the width of all comment boxes in C files
2015-10-03 07:43:18 +08:00
****************************************************************************/
With these fixes, the kernel build is basically functional (but there is more to be done) git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5722 42af7a65-404d-4744-a932-0658087f49c3
2013-03-09 09:27:42 +08:00
Standardize the width of all comment boxes in C files
2015-10-03 07:43:18 +08:00
/****************************************************************************
With these fixes, the kernel build is basically functional (but there is more to be done) git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5722 42af7a65-404d-4744-a932-0658087f49c3
2013-03-09 09:27:42 +08:00
* Included Files
Standardize the width of all comment boxes in C files
2015-10-03 07:43:18 +08:00
****************************************************************************/
With these fixes, the kernel build is basically functional (but there is more to be done) git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5722 42af7a65-404d-4744-a932-0658087f49c3
2013-03-09 09:27:42 +08:00
#include <nuttx/config.h>
mm: Break up mm_user.c and mm_kernel.c into separate files for better symmetry
2014-09-01 01:46:47 +08:00
Move include/nuttx/mm.h to include/nuttx/mm/mm.h
2014-09-24 21:29:09 +08:00
#include <nuttx/mm/mm.h>
With these fixes, the kernel build is basically functional (but there is more to be done) git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5722 42af7a65-404d-4744-a932-0658087f49c3
2013-03-09 09:27:42 +08:00
Protected mode: Redesign how the user space heap is accessed from the kernel code. It used to call memory management functions in user space via function pointers in the userspace interface. That is inefficient because the first thing that those memory management functions do is to trap back into the kernel to get the current PID. Worse, that operation can be fatal is certain fragile situations such as when a task is exitting. The solution is to remove all of the memory management function calls from the interface. Instead, the interface exports the userspace heap structure and then kernel size implementations of those memory management functions will operate on the userspace heap structure. This avoids the unnecessary system calls and, more importantly, failures do to freeing memory when a test exits.
2015-07-10 22:37:02 +08:00
#include "umm_heap/umm_heap.h"
With these fixes, the kernel build is basically functional (but there is more to be done) git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5722 42af7a65-404d-4744-a932-0658087f49c3
2013-03-09 09:27:42 +08:00
Standardize the width of all comment boxes in C files
2015-10-03 07:43:18 +08:00
/****************************************************************************
With these fixes, the kernel build is basically functional (but there is more to be done) git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5722 42af7a65-404d-4744-a932-0658087f49c3
2013-03-09 09:27:42 +08:00
* Public Functions
Standardize the width of all comment boxes in C files
2015-10-03 07:43:18 +08:00
****************************************************************************/
With these fixes, the kernel build is basically functional (but there is more to be done) git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5722 42af7a65-404d-4744-a932-0658087f49c3
2013-03-09 09:27:42 +08:00
Standardize the width of all comment boxes in C files
2015-10-03 07:43:18 +08:00
/****************************************************************************
With these fixes, the kernel build is basically functional (but there is more to be done) git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5722 42af7a65-404d-4744-a932-0658087f49c3
2013-03-09 09:27:42 +08:00
* Name: umm_trysemaphore
*
* Description:
More changes for a kernel-mode allocator (more to be done) git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5724 42af7a65-404d-4744-a932-0658087f49c3
2013-03-10 05:12:20 +08:00
* 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.
With these fixes, the kernel build is basically functional (but there is more to be done) git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5722 42af7a65-404d-4744-a932-0658087f49c3
2013-03-09 09:27:42 +08:00
*
Standardization of some function headers.
2018-03-13 23:52:27 +08:00
* Input Parameters:
With these fixes, the kernel build is basically functional (but there is more to be done) git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5722 42af7a65-404d-4744-a932-0658087f49c3
2013-03-09 09:27:42 +08:00
* None
*
Make sure that labeling is used consistently in all function headers.
2018-02-02 00:00:02 +08:00
* Returned Value:
With these fixes, the kernel build is basically functional (but there is more to be done) git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5722 42af7a65-404d-4744-a932-0658087f49c3
2013-03-09 09:27:42 +08:00
* OK on success; a negated errno on failure
*
Standardize the width of all comment boxes in C files
2015-10-03 07:43:18 +08:00
****************************************************************************/
With these fixes, the kernel build is basically functional (but there is more to be done) git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5722 42af7a65-404d-4744-a932-0658087f49c3
2013-03-09 09:27:42 +08:00
int umm_trysemaphore(void)
{
Space at the beginning of the process data space is now reserved for user heap management structures. In the kernel build mode, these heap structures are shared between the kernel and use code in order to allocate user-specific data.
2014-09-03 01:21:23 +08:00
return mm_trysemaphore(USR_HEAP);
With these fixes, the kernel build is basically functional (but there is more to be done) git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5722 42af7a65-404d-4744-a932-0658087f49c3
2013-03-09 09:27:42 +08:00
}
Standardize the width of all comment boxes in C files
2015-10-03 07:43:18 +08:00
/****************************************************************************
With these fixes, the kernel build is basically functional (but there is more to be done) git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5722 42af7a65-404d-4744-a932-0658087f49c3
2013-03-09 09:27:42 +08:00
* Name: umm_givesemaphore
*
* Description:
More changes for a kernel-mode allocator (more to be done) git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5724 42af7a65-404d-4744-a932-0658087f49c3
2013-03-10 05:12:20 +08:00
* 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.
With these fixes, the kernel build is basically functional (but there is more to be done) git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5722 42af7a65-404d-4744-a932-0658087f49c3
2013-03-09 09:27:42 +08:00
*
Standardization of some function headers.
2018-03-13 23:52:27 +08:00
* Input Parameters:
With these fixes, the kernel build is basically functional (but there is more to be done) git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5722 42af7a65-404d-4744-a932-0658087f49c3
2013-03-09 09:27:42 +08:00
* None
*
Make sure that labeling is used consistently in all function headers.
2018-02-02 00:00:02 +08:00
* Returned Value:
With these fixes, the kernel build is basically functional (but there is more to be done) git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5722 42af7a65-404d-4744-a932-0658087f49c3
2013-03-09 09:27:42 +08:00
* OK on success; a negated errno on failure
*
Standardize the width of all comment boxes in C files
2015-10-03 07:43:18 +08:00
****************************************************************************/
With these fixes, the kernel build is basically functional (but there is more to be done) git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5722 42af7a65-404d-4744-a932-0658087f49c3
2013-03-09 09:27:42 +08:00
void umm_givesemaphore(void)
{
Space at the beginning of the process data space is now reserved for user heap management structures. In the kernel build mode, these heap structures are shared between the kernel and use code in order to allocate user-specific data.
2014-09-03 01:21:23 +08:00
mm_givesemaphore(USR_HEAP);
With these fixes, the kernel build is basically functional (but there is more to be done) git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5722 42af7a65-404d-4744-a932-0658087f49c3
2013-03-09 09:27:42 +08:00
}