Move platform abstraction to base library

src/base/platform/platform.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This module contains the platform-specific code. This make the rest of the
 // code less dependent on operating system, compilers and runtime libraries.
 // This module does specifically not deal with differences between different
 // processor architecture.
 // The platform classes have the same definition for all platforms. The
 // implementation for a particular platform is put in platform_<os>.cc.
 // The build system then uses the implementation for the target platform.
 //
 // This design has been chosen because it is simple and fast. Alternatively,
 // the platform dependent classes could have been implemented using abstract
 // superclasses with virtual methods and having specializations for each
 // platform. This design was rejected because it was more complicated and
 // slower. It would require factory methods for selecting the right
 // implementation and the overhead of virtual methods for performance
 // sensitive like mutex locking/unlocking.
 
-#ifndef V8_PLATFORM_H_
-#define V8_PLATFORM_H_
+#ifndef V8_BASE_PLATFORM_PLATFORM_H_
+#define V8_BASE_PLATFORM_PLATFORM_H_
 
 #include <stdarg.h>
 #include <string>
 #include <vector>
 
 #include "src/base/build_config.h"
-#include "src/platform/mutex.h"
-#include "src/platform/semaphore.h"
+#include "src/base/platform/mutex.h"
+#include "src/base/platform/semaphore.h"
 
 #ifdef __sun
 # ifndef signbit
 namespace std {
 int signbit(double x);
 }
 # endif
 #endif
 
 #if V8_OS_QNX
-#include "src/qnx-math.h"
+#include "src/base/qnx-math.h"
 #endif
 
 // Microsoft Visual C++ specific stuff.
 #if V8_LIBC_MSVCRT
 
 #include "src/base/win32-headers.h"
-#include "src/win32-math.h"
+#include "src/base/win32-math.h"
 
 int strncasecmp(const char* s1, const char* s2, int n);
 
 // Visual C++ 2013 and higher implement this function.
 #if (_MSC_VER < 1800)
 inline int lrint(double flt) {
   int intgr;
 #if V8_TARGET_ARCH_IA32 || V8_TARGET_ARCH_X87
   __asm {
     fld flt
     fistp intgr
   };
 #else
   intgr = static_cast<int>(flt + 0.5);
   if ((intgr & 1) != 0 && intgr - flt == 0.5) {
     // If the number is halfway between two integers, round to the even one.
     intgr--;
   }
 #endif
   return intgr;
 }
 #endif  // _MSC_VER < 1800
 
 #endif  // V8_LIBC_MSVCRT
 
 namespace v8 {
-namespace internal {
+namespace base {
 
 // ----------------------------------------------------------------------------
 // Fast TLS support
 
 #ifndef V8_NO_FAST_TLS
 
 #if defined(_MSC_VER) && (V8_HOST_ARCH_IA32)
 
 #define V8_FAST_TLS_SUPPORTED 1
 
@@ skipping 289 matching lines @@
     void* address = address_;
     size_t size = size_;
     Reset();
     bool result = ReleaseRegion(address, size);
     USE(result);
     ASSERT(result);
   }
 
   // Assign control of the reserved region to a different VirtualMemory object.
   // The old object is no longer functional (IsReserved() returns false).
-  void TakeControl(VirtualMemory* from) {
+  void TakeControl(base::VirtualMemory* from) {
     ASSERT(!IsReserved());
     address_ = from->address_;
     size_ = from->size_;
     from->Reset();
   }
 
   static void* ReserveRegion(size_t size);
 
   static bool CommitRegion(void* base, size_t size, bool is_executable);
 
@@ skipping 116 matching lines @@
 
   PlatformData* data_;
 
   char name_[kMaxThreadNameLength];
   int stack_size_;
   Semaphore* start_semaphore_;
 
   DISALLOW_COPY_AND_ASSIGN(Thread);
 };
 
-} }  // namespace v8::internal
+} }  // namespace v8::base
 
-#endif  // V8_PLATFORM_H_
+#endif  // V8_BASE_PLATFORM_PLATFORM_H_