ThreadBack: reduce hdlFinishedTasks

Author: fchn289

ut/thread/ThPoolBackTest.cpp

@@ -14,7 +14,8 @@ TEST_F(ThPoolBackTest, invalid_maxThread)
         [] { return true; },  // entryFn
         [](bool) {}  // backFn
     )) << "REQ: can create new task";
-    while (threadBack_.hdlFinishedTasks() == 0);  // REQ: wait new task done
+    while (threadBack_.hdlFinishedTasks() == 0)
+        timedwait();  // REQ: wait new task done
 }
 
 // ***********************************************************************************************
@@ -33,7 +34,8 @@ TEST_F(ThPoolBackTest, performance)
             },
             [](bool) {}  // backFn
         ));
-    for (size_t nHandled = 0; nHandled < maxThread; nHandled += thPoolBack.hdlFinishedTasks());
+    for (size_t nHandled = 0; nHandled < maxThread; nHandled += thPoolBack.hdlFinishedTasks())
+        timedwait();
     auto dur = duration_cast<chrono::microseconds>(high_resolution_clock::now() - start);
     HID("ThPoolBack cost=" << dur.count() << "us");
     // - belinb03 : ~ 20 faster than AsyncBack
@@ -50,7 +52,8 @@ TEST_F(ThPoolBackTest, performance)
             },
             [](bool) {}  // backFn
         ));
-    for (size_t nHandled = 0; nHandled < maxThread; nHandled += asyncBack.hdlFinishedTasks());
+    for (size_t nHandled = 0; nHandled < maxThread; nHandled += asyncBack.hdlFinishedTasks())
+        timedwait();
     dur = duration_cast<chrono::microseconds>(high_resolution_clock::now() - start);
     HID("AsyncBack cost=" << dur.count() << "us");
 }

ut/thread/ThreadBackTest.hpp

@@ -135,14 +135,14 @@ TEST_F(THREAD_BACK_TEST, canHandle_someThreadDone_whileOtherRunning)
     while (threadBack_.hdlFinishedTasks() == 0)
     {
         INF("both threads not end yet, wait...");
-        this_thread::yield();
+        timedwait();
     }
 
     canEnd = true;  // 1st thread keep running while 2nd is done
     while (threadBack_.hdlFinishedTasks() == 0)  // no timedwait() so keep occupy cpu
     {
         INF("2nd thread done, wait 1st done...")
-        this_thread::yield();
+        timedwait();
     }
 }
 
@@ -159,7 +159,8 @@ TEST_F(THREAD_BACK_TEST, GOLD_entryFn_notify_insteadof_timeout)
     auto dur = duration_cast<std::chrono::milliseconds>(high_resolution_clock::now() - start);
     EXPECT_LT(dur.count(), 500) << "REQ: entryFn end shall notify g_semToMainTH instead of timeout";
 
-    while (threadBack_.hdlFinishedTasks() == 0);  // clear all threads
+    while (threadBack_.hdlFinishedTasks() == 0)  // clear all threads
+        timedwait();
 }
 
 #define ABNORMAL