1 files changed, 19 insertions, 23 deletions
diff --git a/JavaScriptCore/wtf/ThreadingPthreads.cpp b/JavaScriptCore/wtf/ThreadingPthreads.cpp
index 5a7ff55..0017a6f 100644
--- a/JavaScriptCore/wtf/ThreadingPthreads.cpp
+++ b/JavaScriptCore/wtf/ThreadingPthreads.cpp
@@ -44,6 +44,7 @@
 
 #if !COMPILER(MSVC)
 #include <limits.h>
+#include <sched.h>
 #include <sys/time.h>
 #endif
 
@@ -57,10 +58,6 @@ typedef HashMap<ThreadIdentifier, pthread_t> ThreadMap;
 
 static Mutex* atomicallyInitializedStaticMutex;
 
-#if !OS(DARWIN) || PLATFORM(CHROMIUM) || USE(WEB_THREAD)
-static pthread_t mainThread; // The thread that was the first to call initializeThreading(), which must be the main thread.
-#endif
-
 void clearPthreadHandleForIdentifier(ThreadIdentifier);
 
 static Mutex& threadMapMutex()
@@ -71,15 +68,12 @@ static Mutex& threadMapMutex()
 
 void initializeThreading()
 {
-    if (!atomicallyInitializedStaticMutex) {
-        atomicallyInitializedStaticMutex = new Mutex;
-        threadMapMutex();
-        initializeRandomNumberGenerator();
-#if !OS(DARWIN) || PLATFORM(CHROMIUM) || USE(WEB_THREAD)
-        mainThread = pthread_self();
-#endif
-        initializeMainThread();
-    }
+    if (atomicallyInitializedStaticMutex)
+        return;
+
+    atomicallyInitializedStaticMutex = new Mutex;
+    threadMapMutex();
+    initializeRandomNumberGenerator();
 }
 
 void lockAtomicallyInitializedStaticMutex()
@@ -228,6 +222,11 @@ void detachThread(ThreadIdentifier threadID)
     pthread_detach(pthreadHandle);
 }
 
+void yield()
+{
+    sched_yield();
+}
+
 ThreadIdentifier currentThread()
 {
     ThreadIdentifier id = ThreadIdentifierData::identifier();
@@ -240,18 +239,15 @@ ThreadIdentifier currentThread()
     return id;
 }
 
-bool isMainThread()
-{
-#if OS(DARWIN) && !PLATFORM(CHROMIUM) && !USE(WEB_THREAD)
-    return pthread_main_np();
-#else
-    return pthread_equal(pthread_self(), mainThread);
-#endif
-}
-
 Mutex::Mutex()
 {
-    pthread_mutex_init(&m_mutex, NULL);
+    pthread_mutexattr_t attr;
+    pthread_mutexattr_init(&attr);
+    pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_NORMAL);
+
+    pthread_mutex_init(&m_mutex, &attr);
+
+    pthread_mutexattr_destroy(&attr);
 }
 
 Mutex::~Mutex()