diff options
Diffstat (limited to 'build2/scheduler.txx')
| -rw-r--r-- | build2/scheduler.txx | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/build2/scheduler.txx b/build2/scheduler.txx index c7e6ef2..dd98b4a 100644 --- a/build2/scheduler.txx +++ b/build2/scheduler.txx @@ -66,6 +66,12 @@ namespace build2 typename task::args_type (decay_copy (forward<A> (a))...)}; td->thunk = &task_thunk<F, A...>; + + // Increment the task count. This has to be done under lock to prevent + // the task from decrementing the count before we had a chance to + // increment it. + // + task_count.fetch_add (1, std::memory_order_release); } else { @@ -98,10 +104,6 @@ namespace build2 } } - // Increment the task count. - // - task_count.fetch_add (1, std::memory_order_release); - // If there is a spare active thread, wake up (or create) the helper // (unless someone already snatched it). // |