diff options
Diffstat (limited to 'util/lockcnt.c')
| -rw-r--r-- | util/lockcnt.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/util/lockcnt.c b/util/lockcnt.c index 5da3694..92c9f8c 100644 --- a/util/lockcnt.c +++ b/util/lockcnt.c @@ -7,14 +7,16 @@ * Paolo Bonzini <pbonzini@redhat.com> */ #include "qemu/osdep.h" +#include "qemu/lockcnt.h" #include "qemu/thread.h" #include "qemu/atomic.h" #include "trace.h" -#ifdef CONFIG_LINUX -#include "qemu/futex.h" +#ifdef HAVE_FUTEX -/* On Linux, bits 0-1 are a futex-based lock, bits 2-31 are the counter. +/* + * When futex is available, bits 0-1 are a futex-based lock, bits 2-31 are the + * counter. * For the mutex algorithm see Ulrich Drepper's "Futexes Are Tricky" (ok, * this is not the most relaxing citation I could make...). It is similar * to mutex2 in the paper. @@ -105,7 +107,7 @@ static bool qemu_lockcnt_cmpxchg_or_wait(QemuLockCnt *lockcnt, int *val, static void lockcnt_wake(QemuLockCnt *lockcnt) { trace_lockcnt_futex_wake(lockcnt); - qemu_futex_wake(&lockcnt->count, 1); + qemu_futex_wake_single(&lockcnt->count); } void qemu_lockcnt_inc(QemuLockCnt *lockcnt) |