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authorattilio <attilio@FreeBSD.org>2013-02-21 21:59:35 +0000
committerattilio <attilio@FreeBSD.org>2013-02-21 21:59:35 +0000
commitd883da7ba4eb9b148404a424cba419d0b2289d47 (patch)
tree4cf4378c83ab287d8c742573abc4b47a685812ba /sys/kern/kern_sig.c
parent8702b26c682453a6988606aa821060803a997e25 (diff)
downloadFreeBSD-src-d883da7ba4eb9b148404a424cba419d0b2289d47.zip
FreeBSD-src-d883da7ba4eb9b148404a424cba419d0b2289d47.tar.gz
MFC
Diffstat (limited to 'sys/kern/kern_sig.c')
-rw-r--r--sys/kern/kern_sig.c22
1 files changed, 14 insertions, 8 deletions
diff --git a/sys/kern/kern_sig.c b/sys/kern/kern_sig.c
index 7d3634d..e1dbedc 100644
--- a/sys/kern/kern_sig.c
+++ b/sys/kern/kern_sig.c
@@ -2537,16 +2537,22 @@ tdsigcleanup(struct thread *td)
}
-/* Defer the delivery of SIGSTOP for the current thread. */
-void
-sigdeferstop(struct thread *td)
+/*
+ * Defer the delivery of SIGSTOP for the current thread. Returns true
+ * if stops were deferred and false if they were already deferred.
+ */
+int
+sigdeferstop(void)
{
+ struct thread *td;
- KASSERT(!(td->td_flags & TDF_SBDRY),
- ("attempt to set TDF_SBDRY recursively"));
+ td = curthread;
+ if (td->td_flags & TDF_SBDRY)
+ return (0);
thread_lock(td);
td->td_flags |= TDF_SBDRY;
thread_unlock(td);
+ return (1);
}
/*
@@ -2555,11 +2561,11 @@ sigdeferstop(struct thread *td)
* will suspend either via ast() or a subsequent interruptible sleep.
*/
void
-sigallowstop(struct thread *td)
+sigallowstop()
{
+ struct thread *td;
- KASSERT(td->td_flags & TDF_SBDRY,
- ("attempt to clear already-cleared TDF_SBDRY"));
+ td = curthread;
thread_lock(td);
td->td_flags &= ~TDF_SBDRY;
thread_unlock(td);
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