[base] Migrate Mutex from CRITICAL_SECTION to SRWLOCK

SRWLOCK is a faster and lightweight alternative of CRITICAL_SECTION for
non-recursive use case.

Bug: chromium:592752
Change-Id: Ie97cd9cee2d50a95f316b41c30e953f586b06c99
Reviewed-on: https://chromium-review.googlesource.com/520828
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Commit-Queue: Loo Rong Jie <loorongjie@gmail.com>
Cr-Commit-Position: refs/heads/master@{#45658}

src/base/platform/condition-variable.cc

@@ -134,7 +134,8 @@ void ConditionVariable::NotifyAll() {
 
 void ConditionVariable::Wait(Mutex* mutex) {
   mutex->AssertHeldAndUnmark();
-  SleepConditionVariableCS(&native_handle_, &mutex->native_handle(), INFINITE);
+  SleepConditionVariableSRW(&native_handle_, &mutex->native_handle(), INFINITE,
+                            0);
   mutex->AssertUnheldAndMark();
 }
 
@@ -142,8 +143,8 @@ void ConditionVariable::Wait(Mutex* mutex) {
 bool ConditionVariable::WaitFor(Mutex* mutex, const TimeDelta& rel_time) {
   int64_t msec = rel_time.InMilliseconds();
   mutex->AssertHeldAndUnmark();
-  BOOL result = SleepConditionVariableCS(
-      &native_handle_, &mutex->native_handle(), static_cast<DWORD>(msec));
+  BOOL result = SleepConditionVariableSRW(
+      &native_handle_, &mutex->native_handle(), static_cast<DWORD>(msec), 0);
 #ifdef DEBUG
   if (!result) {
     // On failure, we only expect the CV to timeout. Any other error value means

src/base/platform/mutex.cc

@@ -76,39 +76,6 @@ static V8_INLINE bool TryLockNativeHandle(pthread_mutex_t* mutex) {
   return true;
 }
 
-#elif V8_OS_WIN
-
-static V8_INLINE void InitializeNativeHandle(PCRITICAL_SECTION cs) {
-  InitializeCriticalSection(cs);
-}
-
-
-static V8_INLINE void InitializeRecursiveNativeHandle(PCRITICAL_SECTION cs) {
-  InitializeCriticalSection(cs);
-}
-
-
-static V8_INLINE void DestroyNativeHandle(PCRITICAL_SECTION cs) {
-  DeleteCriticalSection(cs);
-}
-
-
-static V8_INLINE void LockNativeHandle(PCRITICAL_SECTION cs) {
-  EnterCriticalSection(cs);
-}
-
-
-static V8_INLINE void UnlockNativeHandle(PCRITICAL_SECTION cs) {
-  LeaveCriticalSection(cs);
-}
-
-
-static V8_INLINE bool TryLockNativeHandle(PCRITICAL_SECTION cs) {
-  return TryEnterCriticalSection(cs) != FALSE;
-}
-
-#endif  // V8_OS_POSIX
-
 
 Mutex::Mutex() {
   InitializeNativeHandle(&native_handle_);
@@ -188,5 +155,85 @@ bool RecursiveMutex::TryLock() {
   return true;
 }
 
+#elif V8_OS_WIN
+
+Mutex::Mutex() : native_handle_(SRWLOCK_INIT) {
+#ifdef DEBUG
+  level_ = 0;
+#endif
+}
+
+
+Mutex::~Mutex() {
+  DCHECK_EQ(0, level_);
+}
+
+
+void Mutex::Lock() {
+  AcquireSRWLockExclusive(&native_handle_);
+  AssertUnheldAndMark();
+}
+
+
+void Mutex::Unlock() {
+  AssertHeldAndUnmark();
+  ReleaseSRWLockExclusive(&native_handle_);
+}
+
+
+bool Mutex::TryLock() {
+  if (!TryAcquireSRWLockExclusive(&native_handle_)) {
+    return false;
+  }
+  AssertUnheldAndMark();
+  return true;
+}
+
+
+RecursiveMutex::RecursiveMutex() {
+  InitializeCriticalSection(&native_handle_);
+#ifdef DEBUG
+  level_ = 0;
+#endif
+}
+
+
+RecursiveMutex::~RecursiveMutex() {
+  DeleteCriticalSection(&native_handle_);
+  DCHECK_EQ(0, level_);
+}
+
+
+void RecursiveMutex::Lock() {
+  EnterCriticalSection(&native_handle_);
+#ifdef DEBUG
+  DCHECK_LE(0, level_);
+  level_++;
+#endif
+}
+
+
+void RecursiveMutex::Unlock() {
+#ifdef DEBUG
+  DCHECK_LT(0, level_);
+  level_--;
+#endif
+  LeaveCriticalSection(&native_handle_);
+}
+
+
+bool RecursiveMutex::TryLock() {
+  if (!TryEnterCriticalSection(&native_handle_)) {
+    return false;
+  }
+#ifdef DEBUG
+  DCHECK_LE(0, level_);
+  level_++;
+#endif
+  return true;
+}
+
+#endif  // V8_OS_POSIX
+
 }  // namespace base
 }  // namespace v8

src/base/platform/mutex.h

@@ -57,7 +57,7 @@ class V8_BASE_EXPORT Mutex final {
 #if V8_OS_POSIX
   typedef pthread_mutex_t NativeHandle;
 #elif V8_OS_WIN
-  typedef CRITICAL_SECTION NativeHandle;
+  typedef SRWLOCK NativeHandle;
 #endif
 
   NativeHandle& native_handle() {
@@ -153,7 +153,11 @@ class V8_BASE_EXPORT RecursiveMutex final {
   bool TryLock() WARN_UNUSED_RESULT;
 
   // The implementation-defined native handle type.
-  typedef Mutex::NativeHandle NativeHandle;
+#if V8_OS_POSIX
+  typedef pthread_mutex_t NativeHandle;
+#elif V8_OS_WIN
+  typedef CRITICAL_SECTION NativeHandle;
+#endif
 
   NativeHandle& native_handle() {
     return native_handle_;