您最多选择25个主题
主题必须以字母或数字开头，可以包含连字符 (-)，并且长度不得超过35个字符
81 行
1.6 KiB
81 行
1.6 KiB
// 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.
|
|
|
|
#include "port/port_chromium.h"
|
|
|
|
#include "util/logging.h"
|
|
|
|
#if defined(USE_SNAPPY)
|
|
# include "third_party/snappy/src/snappy.h"
|
|
# include "snappy-stubs-public.h"
|
|
#endif
|
|
|
|
namespace leveldb {
|
|
namespace port {
|
|
|
|
Mutex::Mutex() {
|
|
}
|
|
|
|
Mutex::~Mutex() {
|
|
}
|
|
|
|
void Mutex::Lock() {
|
|
mu_.Acquire();
|
|
}
|
|
|
|
void Mutex::Unlock() {
|
|
mu_.Release();
|
|
}
|
|
|
|
void Mutex::AssertHeld() {
|
|
mu_.AssertAcquired();
|
|
}
|
|
|
|
CondVar::CondVar(Mutex* mu)
|
|
: cv_(&mu->mu_) {
|
|
}
|
|
|
|
CondVar::~CondVar() { }
|
|
|
|
void CondVar::Wait() {
|
|
cv_.Wait();
|
|
}
|
|
|
|
void CondVar::Signal(){
|
|
cv_.Signal();
|
|
}
|
|
|
|
void CondVar::SignalAll() {
|
|
cv_.Broadcast();
|
|
}
|
|
|
|
void Lightweight_Compress(const char* input, size_t input_length,
|
|
std::string* output) {
|
|
#if defined(USE_SNAPPY)
|
|
output->resize(snappy::MaxCompressedLength(input_length));
|
|
size_t outlen;
|
|
snappy::RawCompress(input, input_length, &(*output)[0], &outlen);
|
|
output->resize(outlen);
|
|
#else
|
|
output->assign(input, input_length);
|
|
#endif
|
|
}
|
|
|
|
bool Lightweight_Uncompress(const char* input_data, size_t input_length,
|
|
std::string* output) {
|
|
#if defined(USE_SNAPPY)
|
|
size_t ulength;
|
|
if (!snappy::GetUncompressedLength(input_data, input_length, &ulength)) {
|
|
return false;
|
|
}
|
|
output->resize(ulength);
|
|
return snappy::RawUncompress(input_data, input_length, &(*output)[0]);
|
|
#else
|
|
output->assign(input_data, input_length);
|
|
return true;
|
|
#endif
|
|
}
|
|
|
|
}
|
|
}
|