From b47b138d595267315008885e6ac7e2f4322cc5a9 Mon Sep 17 00:00:00 2001
From: Koundinya Veluri <kouvel@microsoft.com>
Date: Fri, 2 Jun 2017 17:04:17 -0700
Subject: Call sched_yield directly for Sleep(0) (#12063)

Related to PR #12057
---
 src/pal/src/include/pal/corunix.hpp   | 4 ----
 src/pal/src/synchmgr/synchmanager.cpp | 5 -----
 src/pal/src/synchmgr/synchmanager.hpp | 2 --
 src/pal/src/synchmgr/wait.cpp         | 2 +-
 4 files changed, 1 insertion(+), 12 deletions(-)

(limited to 'src/pal')

diff --git a/src/pal/src/include/pal/corunix.hpp b/src/pal/src/include/pal/corunix.hpp
index e7f58ed057..e9e9503ed3 100644
--- a/src/pal/src/include/pal/corunix.hpp
+++ b/src/pal/src/include/pal/corunix.hpp
@@ -1097,10 +1097,6 @@ namespace CorUnix
             DWORD *pdwSignaledObject       // OUT
             ) = 0;
 
-        virtual
-        void
-        YieldThread() = 0;
-
         virtual
         PAL_ERROR
         AbandonObjectsOwnedByThread(
diff --git a/src/pal/src/synchmgr/synchmanager.cpp b/src/pal/src/synchmgr/synchmanager.cpp
index a4730cf11f..73b5644dbd 100644
--- a/src/pal/src/synchmgr/synchmanager.cpp
+++ b/src/pal/src/synchmgr/synchmanager.cpp
@@ -434,11 +434,6 @@ namespace CorUnix
         return palErr;
     }
 
-    void CPalSynchronizationManager::YieldThread()
-    {
-        sched_yield();
-    }
-
     PAL_ERROR CPalSynchronizationManager::ThreadNativeWait(
         ThreadNativeWaitData * ptnwdNativeWaitData,
         DWORD dwTimeout,
diff --git a/src/pal/src/synchmgr/synchmanager.hpp b/src/pal/src/synchmgr/synchmanager.hpp
index de8014ba00..883d5b8b61 100644
--- a/src/pal/src/synchmgr/synchmanager.hpp
+++ b/src/pal/src/synchmgr/synchmanager.hpp
@@ -824,8 +824,6 @@ namespace CorUnix
             ThreadWakeupReason *ptwrWakeupReason,
             DWORD *pdwSignaledObject);
 
-        virtual void YieldThread();
-
         virtual PAL_ERROR AbandonObjectsOwnedByThread(
             CPalThread *pthrCurrent,
             CPalThread *pthrTarget);
diff --git a/src/pal/src/synchmgr/wait.cpp b/src/pal/src/synchmgr/wait.cpp
index 8d184e073b..8ef65aaa01 100644
--- a/src/pal/src/synchmgr/wait.cpp
+++ b/src/pal/src/synchmgr/wait.cpp
@@ -702,7 +702,7 @@ DWORD CorUnix::InternalSleepEx (
     }
     else
     {
-        g_pSynchronizationManager->YieldThread();
+        sched_yield();
         dwRet = 0;
     }
 
-- 
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