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Move background thread creation to background_thread_0.

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To avoid complications, avoid invoking pthread_create "internally", instead rely
on thread0 to launch new threads, and also terminating threads when asked.
This commit is contained in:
Qi Wang
2017-06-08 22:46:31 -07:00
committed by Qi Wang
parent 13685ab1b7
commit 464cb60490
4 changed files with 313 additions and 208 deletions
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12
src/ctl.c
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@@ -1948,8 +1948,10 @@ arena_reset_prepare_background_thread(tsd_t *tsd, unsigned arena_ind) {
unsigned ind = arena_ind % ncpus;
background_thread_info_t *info =
&background_thread_info[ind];
assert(info->started);
background_threads_disable_single(tsd, info);
assert(info->started && !info->pause);
malloc_mutex_lock(tsd_tsdn(tsd), &info->mtx);
info->pause = true;
malloc_mutex_unlock(tsd_tsdn(tsd), &info->mtx);
}
}
}
@@ -1961,8 +1963,10 @@ arena_reset_finish_background_thread(tsd_t *tsd, unsigned arena_ind) {
unsigned ind = arena_ind % ncpus;
background_thread_info_t *info =
&background_thread_info[ind];
assert(!info->started);
background_thread_create(tsd, ind);
assert(info->started && info->pause);
malloc_mutex_lock(tsd_tsdn(tsd), &info->mtx);
info->pause = false;
malloc_mutex_unlock(tsd_tsdn(tsd), &info->mtx);
}
malloc_mutex_unlock(tsd_tsdn(tsd), &background_thread_lock);
}