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Use SIGCHLD with waitpid(); implemented wait() and waitid()

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5515 42af7a65-404d-4744-a932-0658087f49c3
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patacongo
2013-01-13 18:53:00 +00:00
parent d771538bc5
commit 79ce472642
3 changed files with 179 additions and 20 deletions
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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: January 12, 2013</p>
<p>Last Updated: January 13, 2013</p>
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@@ -4482,7 +4482,8 @@ build
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<code>CONFIG_SCHED_HAVE_PARENT</code>: Remember the ID of the parent thread when a new child thread is created.
This support enables a few minor features (such as <code>SIGCHLD</code>) and slightly increases the size of the Task Control Block (TCB) of every task to hold the ID of the parent thread.
This support enables some additional features (such as <code>SIGCHLD</code>) and modifies the behavior of other interfaces.
For example, it makes <code>waitpid()</code> more standards complete by restricting the waited-for tasks to the children of the caller.
Default: disabled.
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@@ -4601,10 +4602,11 @@ build
<code>CONFIG_SCHED_LPWORKPERIOD</code>: How often the lower priority worker thread checks for work in units of microseconds. Default: 50*1000 (50 MS).
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<code>CONFIG_SCHED_LPWORKSTACKSIZE - The stack size allocated for the lower priority worker thread. Default: CONFIG_IDLETHREAD_STACKSIZE.
<code>CONFIG_SCHED_LPWORKSTACKSIZE</code>: The stack size allocated for the lower priority worker thread. Default: CONFIG_IDLETHREAD_STACKSIZE.
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<code>CONFIG_SCHED_WAITPID</code>: Enables the <a href="NuttxUserGuide.html#waitpid"><code>waitpid()</code><a> API
<code>CONFIG_SCHED_WAITPID</code>: Enables the <a href="NuttxUserGuide.html#waitpid"><code>waitpid()</code><a> interface in a default, non-standard mode (non-standard in the sense that the waited for PID need not be child of the caller).
If <code>SCHED_HAVE_PARENT</code> is also defined, then this setting will modify the behavior or <a href="NuttxUserGuide.html#waitpid"><code>waitpid()</code><a> (making more spec compliant) and will enable the <a href="NuttxUserGuide.html#waitid"><code>waitid()</code><a> and <a href="NuttxUserGuide.html#wait"><code>waitp()</code><a> interfaces as well.
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<code>CONFIG_SCHED_ATEXIT</code>: Enables the <a href="NuttxUserGuide.html#atexit">atexit()</code><a> API