f67e15e50f
git-svn-id: https://leveldb.googlecode.com/svn/trunk@2 62dab493-f737-651d-591e-8d6aee1b9529
84 lines
1.7 KiB
C++
84 lines
1.7 KiB
C++
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include "port/port_chromium.h"
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#include "util/logging.h"
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#if defined(USE_SNAPPY)
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# include "third_party/snappy/src/snappy.h"
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# include "third_party/snappy/src/snappy-stubs.h"
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#endif
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namespace leveldb {
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namespace port {
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Mutex::Mutex() {
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}
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Mutex::~Mutex() {
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}
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void Mutex::Lock() {
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mu_.Acquire();
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}
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void Mutex::Unlock() {
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mu_.Release();
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}
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void Mutex::AssertHeld() {
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mu_.AssertAcquired();
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}
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CondVar::CondVar(Mutex* mu)
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: cv_(&mu->mu_) {
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}
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CondVar::~CondVar() { }
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void CondVar::Wait() {
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cv_.Wait();
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}
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void CondVar::Signal(){
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cv_.Signal();
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}
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void CondVar::SignalAll() {
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cv_.Broadcast();
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}
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void Lightweight_Compress(const char* input, size_t input_length,
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std::string* output) {
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#if defined(USE_SNAPPY)
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output->resize(snappy::MaxCompressedLength(input_length));
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size_t outlen;
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snappy::RawCompress(snappy::StringPiece(input, input_length),
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&(*output)[0], &outlen);
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output->resize(outlen);
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#else
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output->assign(input, input_length);
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#endif
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}
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bool Lightweight_Uncompress(const char* input_data, size_t input_length,
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std::string* output) {
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#if defined(USE_SNAPPY)
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snappy::StringPiece input(input_data, input_length);
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size_t ulength;
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if (!snappy::GetUncompressedLength(input, &ulength)) {
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return false;
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}
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output->resize(ulength);
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return snappy::RawUncompress(input, &(*output)[0]);
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#else
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output->assign(input_data, input_length);
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return true;
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#endif
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}
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}
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}
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