sergiotarxz/nuttx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Update comments

Browse Source
This commit is contained in:
Gregory Nutt 2016-11-19 08:33:55 -06:00
parent ceacacbc63
commit 5ca9128c38
1 changed files with 8 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
sched/task/task_vfork.c
View File

@ -417,18 +417,19 @@ pid_t task_vforkstart(FAR struct task_tcb_s *child)
/* The child task has not yet ran because pre-emption is disabled.
* The child task has the same priority as the parent task, so that
* would be the case anyway. However, in the SMP case, the child
* thread may have already ran on another CPU.
* would typically be the case anyway. However, in the SMP
* configuration, the child thread might have already ran on
* another CPU if pre-emption were not disabled.
*
* It is a requirement that the parent environment be stable while
* vfork runs; the child thread is still dependent on things in the
* parent thread... like the pointers into parent thread's stack
* which will still appear in the child's registers and environment.
*/
/* Now wait for the child thread to exit before returning to the
* parent thread. NOTE that pre-emption will be re-enabled while
* we are waiting.
*
* We assure that by waiting for the child thread to exit before
* returning to the parent thread. NOTE that pre-emption will be
* re-enabled while we are waiting, giving the child thread the
* opportunity to run.
*/
rc = 0;