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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2013-01-13 18:53:00 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2013-01-13 18:53:00 +0000 |
commit | 0191f2d9e4a4c9857ee37655dd3da523cf74a48a (patch) | |
tree | df530299e0171e8a86a2709ed4f19a1468efda4e /nuttx/Documentation/NuttxPortingGuide.html | |
parent | 0d8a269d4bbb18fa509e642ae2eaec8a8c80a1c3 (diff) | |
download | px4-nuttx-0191f2d9e4a4c9857ee37655dd3da523cf74a48a.tar.gz px4-nuttx-0191f2d9e4a4c9857ee37655dd3da523cf74a48a.tar.bz2 px4-nuttx-0191f2d9e4a4c9857ee37655dd3da523cf74a48a.zip |
Use SIGCHLD with waitpid(); implemented wait() and waitid()
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5515 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/Documentation/NuttxPortingGuide.html')
-rw-r--r-- | nuttx/Documentation/NuttxPortingGuide.html | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/nuttx/Documentation/NuttxPortingGuide.html b/nuttx/Documentation/NuttxPortingGuide.html index 0b67eddb7..fec7106b0 100644 --- a/nuttx/Documentation/NuttxPortingGuide.html +++ b/nuttx/Documentation/NuttxPortingGuide.html @@ -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> </td> </tr> </table> @@ -4482,7 +4482,8 @@ build </li> <li> <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. </li> <li> @@ -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). </li> <li> - <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. </li> <li> - <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. </li> <li> <code>CONFIG_SCHED_ATEXIT</code>: Enables the <a href="NuttxUserGuide.html#atexit">atexit()</code><a> API |