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authorBoris Kolpackov <boris@codesynthesis.com>2021-05-05 12:13:04 +0200
committerBoris Kolpackov <boris@codesynthesis.com>2021-05-05 12:13:04 +0200
commit7037e788eaee494f6d5536e9a9f51bd1ce9a762d (patch)
tree76d9b50ecfab9e1a1cabf005331520470f21b0d9 /libbuild2/context.cxx
parent44750a440fc376b68bcf042e41b5eeeea9549a91 (diff)
Deactivate when blocked on load phase mutex
This turned out to be important when building in multiple contexts that share the scheduler (e.g., main and module/recipe build context). In this case we need an accurate active thread count in order to decide when to start an extra helper thread past max_active.
Diffstat (limited to 'libbuild2/context.cxx')
-rw-r--r--libbuild2/context.cxx14
1 files changed, 12 insertions, 2 deletions
diff --git a/libbuild2/context.cxx b/libbuild2/context.cxx
index 09ab15d..b4ba5df 100644
--- a/libbuild2/context.cxx
+++ b/libbuild2/context.cxx
@@ -664,7 +664,12 @@ namespace build2
//
if (p == run_phase::load)
{
- lm_.lock ();
+ if (!lm_.try_lock ())
+ {
+ ctx_.sched.deactivate (false /* external */);
+ lm_.lock ();
+ ctx_.sched.activate (false /* external */);
+ }
r = !fail_; // Re-query.
}
@@ -773,7 +778,12 @@ namespace build2
if (n == run_phase::load)
{
- lm_.lock ();
+ if (!lm_.try_lock ())
+ {
+ ctx_.sched.deactivate (false /* external */);
+ lm_.lock ();
+ ctx_.sched.activate (false /* external */);
+ }
r = !fail_; // Re-query.
}