Move chromium-specific files from leveldb to chromium.

third_party/leveldatabase/port/port_chromium.h

+// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file. See the AUTHORS file for names of contributors.
+//
+// See port_example.h for documentation for the following types/functions.
+
+#ifndef STORAGE_LEVELDB_PORT_PORT_CHROMIUM_H_
+#define STORAGE_LEVELDB_PORT_PORT_CHROMIUM_H_
+
+#include <stdint.h>
+#include <string>
+#include <cstring>
+#include "base/atomicops.h"
+#include "base/basictypes.h"
+#include "base/synchronization/condition_variable.h"
+#include "base/synchronization/lock.h"
+
+// Linux's ThreadIdentifier() needs this.
+#if defined(OS_LINUX)
+#  include <linux/unistd.h>
+#endif
+
+#if defined(OS_WIN)
+#define snprintf _snprintf
+#define va_copy(a, b) do { (a) = (b); } while (0)
+#endif
+
+namespace leveldb {
+namespace port {
+
+// Chromium only supports little endian.
+static const bool kLittleEndian = true;
+
+class Mutex {
+ public:
+  Mutex();
+  ~Mutex();
+  void Lock();
+  void Unlock();
+  void AssertHeld();
+
+ private:
+  base::Lock mu_;
+
+  friend class CondVar;
+  DISALLOW_COPY_AND_ASSIGN(Mutex);
+};
+
+class CondVar {
+ public:
+  explicit CondVar(Mutex* mu);
+  ~CondVar();
+  void Wait();
+  void Signal();
+  void SignalAll();
+
+ private:
+  base::ConditionVariable cv_;
+
+  DISALLOW_COPY_AND_ASSIGN(CondVar);
+};
+
+class AtomicPointer {
+ private:
+  typedef base::subtle::AtomicWord Rep;
+  Rep rep_;
+ public:
+  AtomicPointer() { }
+  explicit AtomicPointer(void* p) : rep_(reinterpret_cast<Rep>(p)) {}
+  inline void* Acquire_Load() const {
+    return reinterpret_cast<void*>(::base::subtle::Acquire_Load(&rep_));
+  }
+  inline void Release_Store(void* v) {
+    ::base::subtle::Release_Store(&rep_, reinterpret_cast<Rep>(v));
+  }
+  inline void* NoBarrier_Load() const {
+    return reinterpret_cast<void*>(::base::subtle::NoBarrier_Load(&rep_));
+  }
+  inline void NoBarrier_Store(void* v) {
+    ::base::subtle::NoBarrier_Store(&rep_, reinterpret_cast<Rep>(v));
+  }
+};
+
+bool Snappy_Compress(const char* input, size_t input_length,
+                     std::string* output);
+bool Snappy_GetUncompressedLength(const char* input, size_t length,
+                                  size_t* result);
+bool Snappy_Uncompress(const char* input_data, size_t input_length,
+                       char* output);
+
+inline bool GetHeapProfile(void (*func)(void*, const char*, int), void* arg) {
+  return false;
+}
+
+}
+}
+
+#endif  // STORAGE_LEVELDB_PORT_PORT_CHROMIUM_H_