diff options
Diffstat (limited to 'src/thread/__lock.c')
| -rw-r--r-- | src/thread/__lock.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/thread/__lock.c b/src/thread/__lock.c index 45557c88..60eece49 100644 --- a/src/thread/__lock.c +++ b/src/thread/__lock.c @@ -18,9 +18,11 @@ void __lock(volatile int *l) { - if (!libc.threads_minus_1) return; + int need_locks = libc.need_locks; + if (!need_locks) return; /* fast path: INT_MIN for the lock, +1 for the congestion */ int current = a_cas(l, 0, INT_MIN + 1); + if (need_locks < 0) libc.need_locks = 0; if (!current) return; /* A first spin loop, for medium congestion. */ for (unsigned i = 0; i < 10; ++i) { |