Index: src/once.cc |
diff --git a/src/once.cc b/src/once.cc |
deleted file mode 100644 |
index 37fe369fb67a272ab121834968abbabdb78bd787..0000000000000000000000000000000000000000 |
--- a/src/once.cc |
+++ /dev/null |
@@ -1,77 +0,0 @@ |
-// Copyright 2012 the V8 project authors. All rights reserved. |
-// Redistribution and use in source and binary forms, with or without |
-// modification, are permitted provided that the following conditions are |
-// met: |
-// |
-// * Redistributions of source code must retain the above copyright |
-// notice, this list of conditions and the following disclaimer. |
-// * 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. |
-// * Neither the name of Google Inc. nor the names of its |
-// contributors may be used to endorse or promote products derived |
-// from this software without specific prior written permission. |
-// |
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
-// "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 THE COPYRIGHT |
-// OWNER 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 "once.h" |
- |
-#ifdef _WIN32 |
-#include <windows.h> |
-#else |
-#include <sched.h> |
-#endif |
- |
-#include "atomicops.h" |
-#include "checks.h" |
- |
-namespace v8 { |
-namespace internal { |
- |
-void CallOnceImpl(OnceType* once, PointerArgFunction init_func, void* arg) { |
- AtomicWord state = Acquire_Load(once); |
- // Fast path. The provided function was already executed. |
- if (state == ONCE_STATE_DONE) { |
- return; |
- } |
- |
- // The function execution did not complete yet. The once object can be in one |
- // of the two following states: |
- // - UNINITIALIZED: We are the first thread calling this function. |
- // - EXECUTING_FUNCTION: Another thread is already executing the function. |
- // |
- // First, try to change the state from UNINITIALIZED to EXECUTING_FUNCTION |
- // atomically. |
- state = Acquire_CompareAndSwap( |
- once, ONCE_STATE_UNINITIALIZED, ONCE_STATE_EXECUTING_FUNCTION); |
- if (state == ONCE_STATE_UNINITIALIZED) { |
- // We are the first thread to call this function, so we have to call the |
- // function. |
- init_func(arg); |
- Release_Store(once, ONCE_STATE_DONE); |
- } else { |
- // Another thread has already started executing the function. We need to |
- // wait until it completes the initialization. |
- while (state == ONCE_STATE_EXECUTING_FUNCTION) { |
-#ifdef _WIN32 |
- ::Sleep(0); |
-#else |
- sched_yield(); |
-#endif |
- state = Acquire_Load(once); |
- } |
- } |
-} |
- |
-} } // namespace v8::internal |