ioptimize test for fiber in spinlock

2026-02-19 02:12:24 +00:00 · 2013-12-29 11:34:24 +01:00
parent cda3b09042
commit 19059fb1cd
1 changed files with 2 additions and 1 deletions
--- a/src/detail/spinlock.cpp
+++ b/src/detail/spinlock.cpp
@@ -22,6 +22,7 @@ spinlock::spinlock() :
 void
 spinlock::lock()
 {
+    bool is_fiber = 0 != scheduler::instance()->active().get();
    for (;;)
    {
        // access to CPU's cache
@@ -30,7 +31,7 @@ spinlock::lock()
        while ( LOCKED == state_)
        {
            // busy-wait
-            if ( scheduler::instance()->active() )
+            if ( is_fiber)
                scheduler::instance()->yield();
            else
                this_thread::yield();