15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2011 The LevelDB Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. See the AUTHORS file for names of contributors. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "port/port_chromium.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/threading/platform_thread.h" 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "util/logging.h" 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(USE_SNAPPY) 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)# include "third_party/snappy/src/snappy.h" 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace leveldb { 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace port { 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)Mutex::Mutex() { 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)Mutex::~Mutex() { 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void Mutex::Lock() { 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mu_.Acquire(); 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void Mutex::Unlock() { 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mu_.Release(); 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void Mutex::AssertHeld() { 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mu_.AssertAcquired(); 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)CondVar::CondVar(Mutex* mu) 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : cv_(&mu->mu_) { 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)CondVar::~CondVar() { } 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void CondVar::Wait() { 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cv_.Wait(); 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void CondVar::Signal(){ 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cv_.Signal(); 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void CondVar::SignalAll() { 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cv_.Broadcast(); 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void InitOnceImpl(OnceType* once, void (*initializer)()) { 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) OnceType state = ::base::subtle::Acquire_Load(once); 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (state == ONCE_STATE_DONE) 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) state = ::base::subtle::NoBarrier_CompareAndSwap( 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) once, 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ONCE_STATE_UNINITIALIZED, 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ONCE_STATE_EXECUTING_CLOSURE); 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (state == ONCE_STATE_UNINITIALIZED) { 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // We are the first thread, we have to call the closure. 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (*initializer)(); 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ::base::subtle::Release_Store(once, ONCE_STATE_DONE); 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Another thread is running the closure, wait until completion. 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) while (state == ONCE_STATE_EXECUTING_CLOSURE) { 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ::base::PlatformThread::YieldCurrentThread(); 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) state = ::base::subtle::Acquire_Load(once); 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool Snappy_Compress(const char* input, size_t input_length, 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string* output) { 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(USE_SNAPPY) 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) output->resize(snappy::MaxCompressedLength(input_length)); 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size_t outlen; 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) snappy::RawCompress(input, input_length, &(*output)[0], &outlen); 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) output->resize(outlen); 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#else 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool Snappy_GetUncompressedLength(const char* input_data, 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size_t input_length, 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size_t* result) { 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(USE_SNAPPY) 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return snappy::GetUncompressedLength(input_data, input_length, result); 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#else 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool Snappy_Uncompress(const char* input_data, size_t input_length, 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) char* output) { 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(USE_SNAPPY) 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return snappy::RawUncompress(input_data, input_length, output); 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#else 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 110