1 files changed, 64 insertions, 0 deletions
diff --git a/Source/WTF/wtf/LockedPrintStream.cpp b/Source/WTF/wtf/LockedPrintStream.cpp
new file mode 100644
index 000000000..2b69d318e
--- /dev/null
+++ b/Source/WTF/wtf/LockedPrintStream.cpp
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2016 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#include "config.h"
+#include "LockedPrintStream.h"
+
+namespace WTF {
+
+LockedPrintStream::LockedPrintStream(std::unique_ptr<PrintStream> target)
+    : m_target(WTFMove(target))
+{
+}
+
+LockedPrintStream::~LockedPrintStream()
+{
+}
+
+void LockedPrintStream::vprintf(const char* format, va_list args)
+{
+    auto locker = holdLock(m_lock);
+    m_target->vprintf(format, args);
+}
+
+void LockedPrintStream::flush()
+{
+    auto locker = holdLock(m_lock);
+    m_target->flush();
+}
+
+PrintStream& LockedPrintStream::begin()
+{
+    m_lock.lock();
+    return *m_target;
+}
+
+void LockedPrintStream::end()
+{
+    m_lock.unlock();
+}
+
+} // namespace WTF
+