| // 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 <cassert> |
| #include <condition_variable> // NOLINT |
| #include <cstring> |
| #include <mutex> // NOLINT |
| #include <string> |
| |
| #include "base/macros.h" |
| #include "base/thread_annotations.h" |
| #include "build/build_config.h" |
| |
| namespace leveldb { |
| namespace port { |
| |
| // Chromium only supports little endian. |
| static const bool kLittleEndian = true; |
| |
| class LOCKABLE Mutex { |
| public: |
| Mutex() = default; |
| ~Mutex() = default; |
| |
| Mutex(const Mutex&) = delete; |
| Mutex& operator=(const Mutex&) = delete; |
| |
| void Lock() EXCLUSIVE_LOCK_FUNCTION() { mu_.lock(); } |
| void Unlock() UNLOCK_FUNCTION() { mu_.unlock(); } |
| void AssertHeld() ASSERT_EXCLUSIVE_LOCK() {} |
| |
| private: |
| friend class CondVar; |
| std::mutex mu_; |
| }; |
| |
| // Thinly wraps std::condition_variable. |
| class CondVar { |
| public: |
| explicit CondVar(Mutex* mu) : mu_(mu) { assert(mu != nullptr); } |
| ~CondVar() = default; |
| |
| CondVar(const CondVar&) = delete; |
| CondVar& operator=(const CondVar&) = delete; |
| |
| void Wait() { |
| std::unique_lock<std::mutex> lock(mu_->mu_, std::adopt_lock); |
| cv_.wait(lock); |
| lock.release(); |
| } |
| void Signal() { cv_.notify_one(); } |
| void SignalAll() { cv_.notify_all(); } |
| |
| private: |
| std::condition_variable cv_; |
| Mutex* const mu_; |
| }; |
| |
| 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; |
| } |
| |
| uint32_t AcceleratedCRC32C(uint32_t crc, const char* buf, size_t size); |
| |
| } // namespace port |
| } // namespace leveldb |
| |
| #endif // STORAGE_LEVELDB_PORT_PORT_CHROMIUM_H_ |