SkThreadPool ~~> SkTaskGroup

src/utils/SkTaskGroup.h

Index: src/utils/SkTaskGroup.h
diff --git a/src/utils/SkTaskGroup.h b/src/utils/SkTaskGroup.h
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+++ b/src/utils/SkTaskGroup.h
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+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkTaskGroup_DEFINED
+#define SkTaskGroup_DEFINED
+
+#include "SkTypes.h"
+#include "SkRunnable.h"
+
+class SkTaskGroup : SkNoncopyable {
+public:
+    // Create one of these in main() to enable SkTaskGroups globally.
+    struct Enabler : SkNoncopyable {
+        explicit Enabler(int threads = 0);  // Default is system-reported core count.
+        ~Enabler();
+    };
+
+    SkTaskGroup();
+    ~SkTaskGroup() { this->wait(); }
+
+    // Add a task to this SkTaskGroup.  It will likely run() on another thread.
+    void add(SkRunnable*);
+
+    // Block until all Tasks previously add()ed to this SkTaskGroup have run().
+    // You may safely reuse this SkTaskGroup after wait() returns.
+    void wait();
+
+private:
+    /*atomic*/ int32_t fPending;
+};
+
+#endif//SkTaskGroup_DEFINED