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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_NACL_BROWSER_PNACL_TRANSLATION_CACHE_H_
#define COMPONENTS_NACL_BROWSER_PNACL_TRANSLATION_CACHE_H_
#include <map>
#include <memory>
#include "base/files/file_path.h"
#include "base/functional/callback.h"
#include "base/memory/weak_ptr.h"
#include "base/time/time.h"
#include "net/base/cache_type.h"
#include "net/base/completion_once_callback.h"
namespace disk_cache {
class Backend;
struct BackendResult;
}
namespace nacl {
struct PnaclCacheInfo;
}
namespace net {
class DrainableIOBuffer;
}
namespace pnacl {
typedef base::OnceCallback<void(int)> CompletionOnceCallback;
typedef base::OnceCallback<void(int, scoped_refptr<net::DrainableIOBuffer>)>
GetNexeCallback;
class PnaclTranslationCacheEntry;
extern const int kMaxMemCacheSize;
class PnaclTranslationCache final {
public:
PnaclTranslationCache();
PnaclTranslationCache(const PnaclTranslationCache&) = delete;
PnaclTranslationCache& operator=(const PnaclTranslationCache&) = delete;
~PnaclTranslationCache();
// Initialize the translation cache in |cache_dir|. If the return value is
// net::ERR_IO_PENDING, |callback| will be called with a 0 argument on success
// and <0 otherwise.
int InitOnDisk(const base::FilePath& cache_dir,
CompletionOnceCallback callback);
// Initialize the translation cache in memory. If the return value is
// net::ERR_IO_PENDING, |callback| will be called with a 0 argument on success
// and <0 otherwise.
int InitInMemory(CompletionOnceCallback callback);
// Store the nexe in the translation cache, and call |callback| with
// the result. The result passed to the callback is 0 on success and
// <0 otherwise. A reference to |nexe_data| is held until completion
// or cancellation.
void StoreNexe(const std::string& key,
net::DrainableIOBuffer* nexe_data,
CompletionOnceCallback callback);
// Retrieve the nexe from the translation cache. Write the data into |nexe|
// and call |callback|, passing a result code (0 on success and <0 otherwise),
// and a DrainableIOBuffer with the data.
void GetNexe(const std::string& key, GetNexeCallback callback);
// Returns the entry count synchronously if available, or
// net::ERR_IO_PENDING for asynchronous completion via `callback`. Returns
// net::ERR_FAILED if the cache is not yet available.
int32_t Size(net::CompletionOnceCallback callback);
// Return the cache key for |info|
static std::string GetKey(const nacl::PnaclCacheInfo& info);
// Doom all entries between |initial| and |end|. If the return value is
// net::ERR_IO_PENDING, |callback| will be invoked when the operation
// completes.
int DoomEntriesBetween(base::Time initial,
base::Time end,
CompletionOnceCallback callback);
private:
friend class PnaclTranslationCacheEntry;
friend class PnaclTranslationCacheTest;
// PnaclTranslationCacheEntry should only use the
// OpComplete and backend methods on PnaclTranslationCache.
void OpComplete(PnaclTranslationCacheEntry* entry);
disk_cache::Backend* backend() { return disk_cache_.get(); }
int Init(net::CacheType,
const base::FilePath& directory,
int cache_size,
CompletionOnceCallback callback);
void OnCreateBackendComplete(disk_cache::BackendResult result);
std::unique_ptr<disk_cache::Backend> disk_cache_;
CompletionOnceCallback init_callback_;
bool in_memory_;
std::map<void*, scoped_refptr<PnaclTranslationCacheEntry> > open_entries_;
base::WeakPtrFactory<PnaclTranslationCache> weak_ptr_factory_{this};
};
} // namespace pnacl
#endif // COMPONENTS_NACL_BROWSER_PNACL_TRANSLATION_CACHE_H_
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