blob: 1dd8669eb0414c0be0ed0cbdb8c693cf65c3c9e0 [file] [log] [blame]
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/disk_cache/in_flight_backend_io.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/compiler_specific.h"
#include "base/logging.h"
#include "net/base/net_errors.h"
#include "net/disk_cache/backend_impl.h"
#include "net/disk_cache/entry_impl.h"
#include "net/disk_cache/histogram_macros.h"
namespace disk_cache {
BackendIO::BackendIO(InFlightIO* controller, BackendImpl* backend,
const net::CompletionCallback& callback)
: BackgroundIO(controller),
backend_(backend),
callback_(callback),
operation_(OP_NONE),
entry_ptr_(NULL),
iter_ptr_(NULL),
iter_(NULL),
entry_(NULL),
index_(0),
offset_(0),
buf_len_(0),
truncate_(false),
offset64_(0),
start_(NULL) {
start_time_ = base::TimeTicks::Now();
}
// Runs on the background thread.
void BackendIO::ExecuteOperation() {
if (IsEntryOperation())
return ExecuteEntryOperation();
ExecuteBackendOperation();
}
// Runs on the background thread.
void BackendIO::OnIOComplete(int result) {
DCHECK(IsEntryOperation());
DCHECK_NE(result, net::ERR_IO_PENDING);
result_ = result;
NotifyController();
}
// Runs on the primary thread.
void BackendIO::OnDone(bool cancel) {
if (IsEntryOperation()) {
CACHE_UMA(TIMES, "TotalIOTime", 0, ElapsedTime());
}
if (!ReturnsEntry())
return;
if (result() == net::OK) {
static_cast<EntryImpl*>(*entry_ptr_)->OnEntryCreated(backend_);
if (cancel)
(*entry_ptr_)->Close();
}
}
bool BackendIO::IsEntryOperation() {
return operation_ > OP_MAX_BACKEND;
}
// Runs on the background thread.
void BackendIO::ReferenceEntry() {
entry_->AddRef();
}
void BackendIO::Init() {
operation_ = OP_INIT;
}
void BackendIO::OpenEntry(const std::string& key, Entry** entry) {
operation_ = OP_OPEN;
key_ = key;
entry_ptr_ = entry;
}
void BackendIO::CreateEntry(const std::string& key, Entry** entry) {
operation_ = OP_CREATE;
key_ = key;
entry_ptr_ = entry;
}
void BackendIO::DoomEntry(const std::string& key) {
operation_ = OP_DOOM;
key_ = key;
}
void BackendIO::DoomAllEntries() {
operation_ = OP_DOOM_ALL;
}
void BackendIO::DoomEntriesBetween(const base::Time initial_time,
const base::Time end_time) {
operation_ = OP_DOOM_BETWEEN;
initial_time_ = initial_time;
end_time_ = end_time;
}
void BackendIO::DoomEntriesSince(const base::Time initial_time) {
operation_ = OP_DOOM_SINCE;
initial_time_ = initial_time;
}
void BackendIO::OpenNextEntry(void** iter, Entry** next_entry) {
operation_ = OP_OPEN_NEXT;
iter_ptr_ = iter;
entry_ptr_ = next_entry;
}
void BackendIO::OpenPrevEntry(void** iter, Entry** prev_entry) {
operation_ = OP_OPEN_PREV;
iter_ptr_ = iter;
entry_ptr_ = prev_entry;
}
void BackendIO::EndEnumeration(void* iterator) {
operation_ = OP_END_ENUMERATION;
iter_ = iterator;
}
void BackendIO::OnExternalCacheHit(const std::string& key) {
operation_ = OP_ON_EXTERNAL_CACHE_HIT;
key_ = key;
}
void BackendIO::CloseEntryImpl(EntryImpl* entry) {
operation_ = OP_CLOSE_ENTRY;
entry_ = entry;
}
void BackendIO::DoomEntryImpl(EntryImpl* entry) {
operation_ = OP_DOOM_ENTRY;
entry_ = entry;
}
void BackendIO::FlushQueue() {
operation_ = OP_FLUSH_QUEUE;
}
void BackendIO::RunTask(const base::Closure& task) {
operation_ = OP_RUN_TASK;
task_ = task;
}
void BackendIO::ReadData(EntryImpl* entry, int index, int offset,
net::IOBuffer* buf, int buf_len) {
operation_ = OP_READ;
entry_ = entry;
index_ = index;
offset_ = offset;
buf_ = buf;
buf_len_ = buf_len;
}
void BackendIO::WriteData(EntryImpl* entry, int index, int offset,
net::IOBuffer* buf, int buf_len, bool truncate) {
operation_ = OP_WRITE;
entry_ = entry;
index_ = index;
offset_ = offset;
buf_ = buf;
buf_len_ = buf_len;
truncate_ = truncate;
}
void BackendIO::ReadSparseData(EntryImpl* entry, int64 offset,
net::IOBuffer* buf, int buf_len) {
operation_ = OP_READ_SPARSE;
entry_ = entry;
offset64_ = offset;
buf_ = buf;
buf_len_ = buf_len;
}
void BackendIO::WriteSparseData(EntryImpl* entry, int64 offset,
net::IOBuffer* buf, int buf_len) {
operation_ = OP_WRITE_SPARSE;
entry_ = entry;
offset64_ = offset;
buf_ = buf;
buf_len_ = buf_len;
}
void BackendIO::GetAvailableRange(EntryImpl* entry, int64 offset, int len,
int64* start) {
operation_ = OP_GET_RANGE;
entry_ = entry;
offset64_ = offset;
buf_len_ = len;
start_ = start;
}
void BackendIO::CancelSparseIO(EntryImpl* entry) {
operation_ = OP_CANCEL_IO;
entry_ = entry;
}
void BackendIO::ReadyForSparseIO(EntryImpl* entry) {
operation_ = OP_IS_READY;
entry_ = entry;
}
BackendIO::~BackendIO() {}
bool BackendIO::ReturnsEntry() {
return (operation_ == OP_OPEN || operation_ == OP_CREATE ||
operation_ == OP_OPEN_NEXT || operation_ == OP_OPEN_PREV);
}
base::TimeDelta BackendIO::ElapsedTime() const {
return base::TimeTicks::Now() - start_time_;
}
// Runs on the background thread.
void BackendIO::ExecuteBackendOperation() {
switch (operation_) {
case OP_INIT:
result_ = backend_->SyncInit();
break;
case OP_OPEN:
result_ = backend_->SyncOpenEntry(key_, entry_ptr_);
break;
case OP_CREATE:
result_ = backend_->SyncCreateEntry(key_, entry_ptr_);
break;
case OP_DOOM:
result_ = backend_->SyncDoomEntry(key_);
break;
case OP_DOOM_ALL:
result_ = backend_->SyncDoomAllEntries();
break;
case OP_DOOM_BETWEEN:
result_ = backend_->SyncDoomEntriesBetween(initial_time_, end_time_);
break;
case OP_DOOM_SINCE:
result_ = backend_->SyncDoomEntriesSince(initial_time_);
break;
case OP_OPEN_NEXT:
result_ = backend_->SyncOpenNextEntry(iter_ptr_, entry_ptr_);
break;
case OP_OPEN_PREV:
result_ = backend_->SyncOpenPrevEntry(iter_ptr_, entry_ptr_);
break;
case OP_END_ENUMERATION:
backend_->SyncEndEnumeration(iter_);
result_ = net::OK;
break;
case OP_ON_EXTERNAL_CACHE_HIT:
backend_->SyncOnExternalCacheHit(key_);
result_ = net::OK;
break;
case OP_CLOSE_ENTRY:
entry_->Release();
result_ = net::OK;
break;
case OP_DOOM_ENTRY:
entry_->DoomImpl();
result_ = net::OK;
break;
case OP_FLUSH_QUEUE:
result_ = net::OK;
break;
case OP_RUN_TASK:
task_.Run();
result_ = net::OK;
break;
default:
NOTREACHED() << "Invalid Operation";
result_ = net::ERR_UNEXPECTED;
}
DCHECK_NE(net::ERR_IO_PENDING, result_);
NotifyController();
}
// Runs on the background thread.
void BackendIO::ExecuteEntryOperation() {
switch (operation_) {
case OP_READ:
result_ = entry_->ReadDataImpl(
index_, offset_, buf_, buf_len_,
base::Bind(&BackendIO::OnIOComplete, this));
break;
case OP_WRITE:
result_ = entry_->WriteDataImpl(
index_, offset_, buf_, buf_len_,
base::Bind(&BackendIO::OnIOComplete, this),
truncate_);
break;
case OP_READ_SPARSE:
result_ = entry_->ReadSparseDataImpl(
offset64_, buf_, buf_len_,
base::Bind(&BackendIO::OnIOComplete, this));
break;
case OP_WRITE_SPARSE:
result_ = entry_->WriteSparseDataImpl(
offset64_, buf_, buf_len_,
base::Bind(&BackendIO::OnIOComplete, this));
break;
case OP_GET_RANGE:
result_ = entry_->GetAvailableRangeImpl(offset64_, buf_len_, start_);
break;
case OP_CANCEL_IO:
entry_->CancelSparseIOImpl();
result_ = net::OK;
break;
case OP_IS_READY:
result_ = entry_->ReadyForSparseIOImpl(
base::Bind(&BackendIO::OnIOComplete, this));
break;
default:
NOTREACHED() << "Invalid Operation";
result_ = net::ERR_UNEXPECTED;
}
if (result_ != net::ERR_IO_PENDING)
NotifyController();
}
InFlightBackendIO::InFlightBackendIO(BackendImpl* backend,
base::MessageLoopProxy* background_thread)
: backend_(backend),
background_thread_(background_thread),
ALLOW_THIS_IN_INITIALIZER_LIST(ptr_factory_(this)) {
}
InFlightBackendIO::~InFlightBackendIO() {
}
void InFlightBackendIO::Init(const net::CompletionCallback& callback) {
scoped_refptr<BackendIO> operation(new BackendIO(this, backend_, callback));
operation->Init();
PostOperation(operation);
}
void InFlightBackendIO::OpenEntry(const std::string& key, Entry** entry,
const net::CompletionCallback& callback) {
scoped_refptr<BackendIO> operation(new BackendIO(this, backend_, callback));
operation->OpenEntry(key, entry);
PostOperation(operation);
}
void InFlightBackendIO::CreateEntry(const std::string& key, Entry** entry,
const net::CompletionCallback& callback) {
scoped_refptr<BackendIO> operation(new BackendIO(this, backend_, callback));
operation->CreateEntry(key, entry);
PostOperation(operation);
}
void InFlightBackendIO::DoomEntry(const std::string& key,
const net::CompletionCallback& callback) {
scoped_refptr<BackendIO> operation(new BackendIO(this, backend_, callback));
operation->DoomEntry(key);
PostOperation(operation);
}
void InFlightBackendIO::DoomAllEntries(
const net::CompletionCallback& callback) {
scoped_refptr<BackendIO> operation(new BackendIO(this, backend_, callback));
operation->DoomAllEntries();
PostOperation(operation);
}
void InFlightBackendIO::DoomEntriesBetween(const base::Time initial_time,
const base::Time end_time,
const net::CompletionCallback& callback) {
scoped_refptr<BackendIO> operation(new BackendIO(this, backend_, callback));
operation->DoomEntriesBetween(initial_time, end_time);
PostOperation(operation);
}
void InFlightBackendIO::DoomEntriesSince(
const base::Time initial_time, const net::CompletionCallback& callback) {
scoped_refptr<BackendIO> operation(new BackendIO(this, backend_, callback));
operation->DoomEntriesSince(initial_time);
PostOperation(operation);
}
void InFlightBackendIO::OpenNextEntry(void** iter, Entry** next_entry,
const net::CompletionCallback& callback) {
scoped_refptr<BackendIO> operation(new BackendIO(this, backend_, callback));
operation->OpenNextEntry(iter, next_entry);
PostOperation(operation);
}
void InFlightBackendIO::OpenPrevEntry(void** iter, Entry** prev_entry,
const net::CompletionCallback& callback) {
scoped_refptr<BackendIO> operation(new BackendIO(this, backend_, callback));
operation->OpenPrevEntry(iter, prev_entry);
PostOperation(operation);
}
void InFlightBackendIO::EndEnumeration(void* iterator) {
scoped_refptr<BackendIO> operation(
new BackendIO(this, backend_, net::CompletionCallback()));
operation->EndEnumeration(iterator);
PostOperation(operation);
}
void InFlightBackendIO::OnExternalCacheHit(const std::string& key) {
scoped_refptr<BackendIO> operation(
new BackendIO(this, backend_, net::CompletionCallback()));
operation->OnExternalCacheHit(key);
PostOperation(operation);
}
void InFlightBackendIO::CloseEntryImpl(EntryImpl* entry) {
scoped_refptr<BackendIO> operation(
new BackendIO(this, backend_, net::CompletionCallback()));
operation->CloseEntryImpl(entry);
PostOperation(operation);
}
void InFlightBackendIO::DoomEntryImpl(EntryImpl* entry) {
scoped_refptr<BackendIO> operation(
new BackendIO(this, backend_, net::CompletionCallback()));
operation->DoomEntryImpl(entry);
PostOperation(operation);
}
void InFlightBackendIO::FlushQueue(const net::CompletionCallback& callback) {
scoped_refptr<BackendIO> operation(new BackendIO(this, backend_, callback));
operation->FlushQueue();
PostOperation(operation);
}
void InFlightBackendIO::RunTask(
const base::Closure& task, const net::CompletionCallback& callback) {
scoped_refptr<BackendIO> operation(new BackendIO(this, backend_, callback));
operation->RunTask(task);
PostOperation(operation);
}
void InFlightBackendIO::ReadData(EntryImpl* entry, int index, int offset,
net::IOBuffer* buf, int buf_len,
const net::CompletionCallback& callback) {
scoped_refptr<BackendIO> operation(new BackendIO(this, backend_, callback));
operation->ReadData(entry, index, offset, buf, buf_len);
PostOperation(operation);
}
void InFlightBackendIO::WriteData(EntryImpl* entry, int index, int offset,
net::IOBuffer* buf, int buf_len,
bool truncate,
const net::CompletionCallback& callback) {
scoped_refptr<BackendIO> operation(new BackendIO(this, backend_, callback));
operation->WriteData(entry, index, offset, buf, buf_len, truncate);
PostOperation(operation);
}
void InFlightBackendIO::ReadSparseData(
EntryImpl* entry, int64 offset, net::IOBuffer* buf, int buf_len,
const net::CompletionCallback& callback) {
scoped_refptr<BackendIO> operation(new BackendIO(this, backend_, callback));
operation->ReadSparseData(entry, offset, buf, buf_len);
PostOperation(operation);
}
void InFlightBackendIO::WriteSparseData(
EntryImpl* entry, int64 offset, net::IOBuffer* buf, int buf_len,
const net::CompletionCallback& callback) {
scoped_refptr<BackendIO> operation(new BackendIO(this, backend_, callback));
operation->WriteSparseData(entry, offset, buf, buf_len);
PostOperation(operation);
}
void InFlightBackendIO::GetAvailableRange(
EntryImpl* entry, int64 offset, int len, int64* start,
const net::CompletionCallback& callback) {
scoped_refptr<BackendIO> operation(new BackendIO(this, backend_, callback));
operation->GetAvailableRange(entry, offset, len, start);
PostOperation(operation);
}
void InFlightBackendIO::CancelSparseIO(EntryImpl* entry) {
scoped_refptr<BackendIO> operation(
new BackendIO(this, backend_, net::CompletionCallback()));
operation->CancelSparseIO(entry);
PostOperation(operation);
}
void InFlightBackendIO::ReadyForSparseIO(
EntryImpl* entry, const net::CompletionCallback& callback) {
scoped_refptr<BackendIO> operation(new BackendIO(this, backend_, callback));
operation->ReadyForSparseIO(entry);
PostOperation(operation);
}
void InFlightBackendIO::WaitForPendingIO() {
InFlightIO::WaitForPendingIO();
}
void InFlightBackendIO::OnOperationComplete(BackgroundIO* operation,
bool cancel) {
BackendIO* op = static_cast<BackendIO*>(operation);
op->OnDone(cancel);
if (!op->callback().is_null() && (!cancel || op->IsEntryOperation()))
op->callback().Run(op->result());
}
void InFlightBackendIO::PostOperation(BackendIO* operation) {
background_thread_->PostTask(FROM_HERE,
base::Bind(&BackendIO::ExecuteOperation, operation));
OnOperationPosted(operation);
}
base::WeakPtr<InFlightBackendIO> InFlightBackendIO::GetWeakPtr() {
return ptr_factory_.GetWeakPtr();
}
} // namespace