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futures: move flag check under lock

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This commit is contained in:
Matthew Flatt 2011-04-08 17:38:09 -06:00
parent 71df6ddc05
commit 1028c669b7
1 changed files with 3 additions and 1 deletions
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4
src/racket/src/future.c
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@ -2079,10 +2079,12 @@ void scheme_check_future_work()
if (ft) {
fs->future_waiting_lwc = ft->next_waiting_lwc;
ft->next_waiting_lwc = NULL;
if (!ft->want_lw)
ft = NULL;
}
mzrt_mutex_unlock(fs->future_mutex);
if (ft && ft->want_lw) {
if (ft) {
void *storage[3];
if (capture_future_continuation(ft, storage)) {