Index: Source/WTF/wtf/OSAllocator.h |
diff --git a/Source/WTF/wtf/OSAllocator.h b/Source/WTF/wtf/OSAllocator.h |
deleted file mode 100644 |
index a12a46749723660017ef9502e77c4207e6135e5f..0000000000000000000000000000000000000000 |
--- a/Source/WTF/wtf/OSAllocator.h |
+++ /dev/null |
@@ -1,115 +0,0 @@ |
-/* |
- * Copyright (C) 2010 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. AND ITS 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 APPLE INC. OR ITS 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. |
- */ |
- |
-#ifndef OSAllocator_h |
-#define OSAllocator_h |
- |
-#include <algorithm> |
-#include <wtf/UnusedParam.h> |
-#include <wtf/VMTags.h> |
- |
-namespace WTF { |
- |
-class OSAllocator { |
-public: |
- enum Usage { |
- UnknownUsage = -1, |
- FastMallocPages = VM_TAG_FOR_TCMALLOC_MEMORY, |
- JSGCHeapPages = VM_TAG_FOR_COLLECTOR_MEMORY, |
- JSVMStackPages = VM_TAG_FOR_REGISTERFILE_MEMORY, |
- JSJITCodePages = VM_TAG_FOR_EXECUTABLEALLOCATOR_MEMORY, |
- }; |
- |
- // These methods are symmetric; reserveUncommitted allocates VM in an uncommitted state, |
- // releaseDecommitted should be called on a region of VM allocated by a single reservation, |
- // the memory must all currently be in a decommitted state. |
- static void* reserveUncommitted(size_t, Usage = UnknownUsage, bool writable = true, bool executable = false, bool includesGuardPages = false); |
- WTF_EXPORT_PRIVATE static void releaseDecommitted(void*, size_t); |
- |
- // These methods are symmetric; they commit or decommit a region of VM (uncommitted VM should |
- // never be accessed, since the OS may not have attached physical memory for these regions). |
- // Clients should only call commit on uncommitted regions and decommit on committed regions. |
- static void commit(void*, size_t, bool writable, bool executable); |
- static void decommit(void*, size_t); |
- |
- // These methods are symmetric; reserveAndCommit allocates VM in an committed state, |
- // decommitAndRelease should be called on a region of VM allocated by a single reservation, |
- // the memory must all currently be in a committed state. |
- WTF_EXPORT_PRIVATE static void* reserveAndCommit(size_t, Usage = UnknownUsage, bool writable = true, bool executable = false, bool includesGuardPages = false); |
- static void decommitAndRelease(void* base, size_t size); |
- |
- // These methods are akin to reserveAndCommit/decommitAndRelease, above - however rather than |
- // committing/decommitting the entire region additional parameters allow a subregion to be |
- // specified. |
- static void* reserveAndCommit(size_t reserveSize, size_t commitSize, Usage = UnknownUsage, bool writable = true, bool executable = false); |
- static void decommitAndRelease(void* releaseBase, size_t releaseSize, void* decommitBase, size_t decommitSize); |
- |
- // Reallocate an existing, committed allocation. |
- // The prior allocation must be fully comitted, and the new size will also be fully committed. |
- // This interface is provided since it may be possible to optimize this operation on some platforms. |
- template<typename T> |
- static T* reallocateCommitted(T*, size_t oldSize, size_t newSize, Usage = UnknownUsage, bool writable = true, bool executable = false); |
-}; |
- |
-inline void* OSAllocator::reserveAndCommit(size_t reserveSize, size_t commitSize, Usage usage, bool writable, bool executable) |
-{ |
- void* base = reserveUncommitted(reserveSize, usage, writable, executable); |
- commit(base, commitSize, writable, executable); |
- return base; |
-} |
- |
-inline void OSAllocator::decommitAndRelease(void* releaseBase, size_t releaseSize, void* decommitBase, size_t decommitSize) |
-{ |
- ASSERT(decommitBase >= releaseBase && (static_cast<char*>(decommitBase) + decommitSize) <= (static_cast<char*>(releaseBase) + releaseSize)); |
-#if OS(WINCE) |
- // On most platforms we can actually skip this final decommit; releasing the VM will |
- // implicitly decommit any physical memory in the region. This is not true on WINCE. |
- decommit(decommitBase, decommitSize); |
-#else |
- UNUSED_PARAM(decommitBase); |
- UNUSED_PARAM(decommitSize); |
-#endif |
- releaseDecommitted(releaseBase, releaseSize); |
-} |
- |
-inline void OSAllocator::decommitAndRelease(void* base, size_t size) |
-{ |
- decommitAndRelease(base, size, base, size); |
-} |
- |
-template<typename T> |
-inline T* OSAllocator::reallocateCommitted(T* oldBase, size_t oldSize, size_t newSize, Usage usage, bool writable, bool executable) |
-{ |
- void* newBase = reserveAndCommit(newSize, usage, writable, executable); |
- memcpy(newBase, oldBase, std::min(oldSize, newSize)); |
- decommitAndRelease(oldBase, oldSize); |
- return static_cast<T*>(newBase); |
-} |
- |
-} // namespace WTF |
- |
-using WTF::OSAllocator; |
- |
-#endif // OSAllocator_h |