- Account for number of pending tasks in old-space collections.

runtime/vm/thread_win.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_WINDOWS)
 
 #include "vm/thread.h"
 
 #include <process.h>  // NOLINT
 
 #include "platform/assert.h"
+#include "vm/isolate.h"
 
 namespace dart {
 
 class ThreadStartData {
  public:
   ThreadStartData(Thread::ThreadStartFunction function, uword parameter)
       : function_(function), parameter_(parameter) {}
 
   Thread::ThreadStartFunction function() const { return function_; }
   uword parameter() const { return parameter_; }
@@ skipping 140 matching lines @@
   }
 }
 
 
 Mutex::Mutex() {
   // Allocate unnamed semaphore with initial count 1 and max count 1.
   data_.semaphore_ = CreateSemaphore(NULL, 1, 1, NULL);
   if (data_.semaphore_ == NULL) {
     FATAL1("Mutex allocation failed %d", GetLastError());
   }
+  // When running with assertions enabled we do track the owner.
+#if defined(DEBUG)
+  owner_ = NULL;
+#endif  // defined(DEBUG)
 }
 
 
 Mutex::~Mutex() {
   CloseHandle(data_.semaphore_);
+  // When running with assertions enabled we do track the owner.
+#if defined(DEBUG)
+  ASSERT(owner_ == NULL);
+#endif  // defined(DEBUG)
 }
 
 
 void Mutex::Lock() {
   DWORD result = WaitForSingleObject(data_.semaphore_, INFINITE);
   if (result != WAIT_OBJECT_0) {
     FATAL1("Mutex lock failed %d", GetLastError());
   }
+  // When running with assertions enabled we do track the owner.
+#if defined(DEBUG)
+  owner_ = Isolate::Current();
+#endif  // defined(DEBUG)
 }
 
 
 bool Mutex::TryLock() {
   // Attempt to pass the semaphore but return immediately.
   DWORD result = WaitForSingleObject(data_.semaphore_, 0);
   if (result == WAIT_OBJECT_0) {
+    // When running with assertions enabled we do track the owner.
+#if defined(DEBUG)
+    owner_ = Isolate::Current();
+#endif  // defined(DEBUG)
     return true;
   }
   if (result == WAIT_ABANDONED || result == WAIT_FAILED) {
     FATAL1("Mutex try lock failed %d", GetLastError());
   }
   ASSERT(result == WAIT_TIMEOUT);
   return false;
 }
 
 
 void Mutex::Unlock() {
+  // When running with assertions enabled we do track the owner.
+#if defined(DEBUG)
+  ASSERT(owner_ == Isolate::Current());
+  owner_ = NULL;
+#endif  // defined(DEBUG)
   BOOL result = ReleaseSemaphore(data_.semaphore_, 1, NULL);
   if (result == 0) {
     FATAL1("Mutex unlock failed %d", GetLastError());
   }
 }
 
 
 ThreadLocalKey MonitorWaitData::monitor_wait_data_key_ =
     Thread::kUnsetThreadLocalKey;
 
@@ skipping 216 matching lines @@
   // timeout before we signal it, that object will get an extra
   // signal. This will be treated as a spurious wake-up and is OK
   // since all uses of monitors should recheck the condition after a
   // Wait.
   data_.SignalAndRemoveAllWaiters();
 }
 
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_WINDOWS)