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waitpid(): Move some logic inside of a critical section 

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5054 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2012-08-26 22:00:38 +00:00
parent c611d361c1
commit a6e8ab1d51
2 changed files with 4 additions and 1 deletions
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2
ChangeLog
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@ -3183,3 +3183,5 @@
Fix some strange (and probably wrong) list handling when
CONFIG_PRIORITY_INHERITANCE and CONFIG_SEM_PREALLOCHOLDERS are defined.
This list handling was probably causing errors reported by Mike Smith
* sched/sched_waitpid.c: Fix a possible issue with logic logic that
should be brought into a critical section (suggested by Mike Smith)

3
sched/sched_waitpid.c
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@ -178,7 +178,7 @@
pid_t waitpid(pid_t pid, int *stat_loc, int options)
{
_TCB *tcb = sched_gettcb(pid);
_TCB *tcb;
bool mystat;
int err;
int ret;
@ -186,6 +186,7 @@ pid_t waitpid(pid_t pid, int *stat_loc, int options)
/* Disable pre-emption so that nothing changes in the following tests */
sched_lock();
tcb = sched_gettcb(pid);
if (!tcb)
{
err = ECHILD;