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atexit() functions now called when task killed by task delete; For MCUs with <= 64Kb of SRAM, CONFIG_MM_SMALL can be defined to reduce the memory allocation overhead

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3648 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2011-05-28 21:42:18 +00:00
parent ca3ea08db4
commit 358aff8f25
2 changed files with 31 additions and 4 deletions
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22
Documentation/NuttX.html
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@ -8,7 +8,7 @@
<tr align="center" bgcolor="#e4e4e4">
<td>
<h1><big><font color="#3c34ec"><i>NuttX RTOS</i></font></big></h1>
<p>Last Updated: May 25, 2011</p>
<p>Last Updated: May 28, 2011</p>
</td>
</tr>
</table>
@ -2313,8 +2313,24 @@ nuttx-6.4 2011-xx-xx Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;
the MPLAB debugger on PIC32; I will need to get a PICkit 3).
* drivers/net/e1000.c/h: A PCI-based E1000 ethernet driver submitted
by Yu Qiang.
* lib/net/lib_inetaddr.c: An implementatino of the inet_addr() function
submitted y Yu Qiang.
* lib/net/lib_inetaddr.c: An implementation of the inet_addr() function
submitted by Yu Qiang.
* arch/arm/src/lpc31xx and arch/arm/include/lpc31xx: Renamed from lpc313x
to make name space for other famiy members.
* arch/arm/*/lpc31xx: Added support for the LPC315x family (untested).
* sched/task_exithook.c: Functionality performed when a task exits or is
deleted has been moved to a common file task_exithook.c. Now exit()
functionality (like flushing I/O and calling registered atexit()
functions, etc.) will be performed when a task is deleted as well.
* mm/: Added support for CONFIG_MM_SMALL. Each memory allocation has a
small allocation overhead. The size of that overhead is normally
determined by the &quot;width&quot; of the address support by the MCU. MCUs
that support 16-bit addressability have smaller overhead than devices
that support 32-bit addressability. However, there are many MCUs
that support 32-bit addressability *but* have internal SRAM of size
less than or equal to 64Kb. In this case, CONFIG_MM_SMALL can be
defined so that those MCUs will also benefit from the smaller, 16-
bit-based allocation overhead.
apps-6.4 2011-xx-xx Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;

13
Documentation/NuttxPortingGuide.html
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@ -12,7 +12,7 @@
<h1><big><font color="#3c34ec">
<i>NuttX RTOS Porting Guide</i>
</font></big></h1>
<p>Last Updated: May 25, 2011</p>
<p>Last Updated: May 28, 2011</p>
</td>
</tr>
</table>
@ -3262,6 +3262,17 @@ build
number of memory regions that the memory manager must
handle and enables the API mm_addregion(start, end);
</li>
<li>
<code>CONFIG_MM_SMALL</code>: Each memory allocation has a small allocation
overhead. The size of that overhead is normally determined by
the &quot;width&quot; of the address support by the MCU. MCUs that support
16-bit addressability have smaller overhead than devices that
support 32-bit addressability. However, there are many MCUs
that support 32-bit addressability <i>but</i> have internal SRAM
of size less than or equal to 64Kb. In this case, CONFIG_MM_SMALL
can be defined so that those MCUs will also benefit from the
smaller, 16-bit-based allocation overhead.
</li>
<li>
<code>CONFIG_MSEC_PER_TICK</code>: The default system timer is 100Hz
or <code>MSEC_PER_TICK</code>=10. This setting may be defined to inform NuttX