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// 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/logging.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_Uncompress(const char* input_data, size_t input_length,
std::string* output);
inline bool GetHeapProfile(void (*func)(void*, const char*, int), void* arg) {
return false;
}
}
}
#endif // STORAGE_LEVELDB_PORT_PORT_CHROMIUM_H_
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