diff options
Diffstat (limited to 'src/thread/__lock.c')
| -rw-r--r-- | src/thread/__lock.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/src/thread/__lock.c b/src/thread/__lock.c index 2f345ae7..0874c04a 100644 --- a/src/thread/__lock.c +++ b/src/thread/__lock.c @@ -2,11 +2,14 @@ void __lock(volatile int *l) { - while (a_swap(l, 1)) __wait(l, l+1, 1, 1); + if (libc.threads_minus_1) + while (a_swap(l, 1)) __wait(l, l+1, 1, 1); } void __unlock(volatile int *l) { - a_store(l, 0); - if (l[1]) __wake(l, 1, 1); + if (l[0]) { + a_store(l, 0); + if (l[1]) __wake(l, 1, 1); + } } |