Index: storage/browser/quota/quota_settings.h |
diff --git a/storage/browser/quota/quota_settings.h b/storage/browser/quota/quota_settings.h |
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+// Copyright 2016 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. |
+ |
+#ifndef STORAGE_BROWSER_QUOTA_QUOTA_SETTINGS_H_ |
+#define STORAGE_BROWSER_QUOTA_QUOTA_SETTINGS_H_ |
+ |
+#include <stdint.h> |
+ |
+#include "base/callback.h" |
+#include "base/files/file_path.h" |
+#include "base/optional.h" |
+#include "base/time/time.h" |
+#include "storage/browser/storage_browser_export.h" |
+ |
+namespace storage { |
+ |
+// Settings the storage lib embedder must provide to the QuotaManager. |
+struct QuotaSettings { |
+ QuotaSettings() = default; |
+ QuotaSettings(int64_t pool_size, |
+ int64_t per_host_quota, |
+ int64_t should_remain_available, |
+ int64_t must_remain_available) |
+ : pool_size(pool_size), |
+ per_host_quota(per_host_quota), |
+ should_remain_available(should_remain_available), |
+ must_remain_available(must_remain_available) {} |
+ |
+ // The target size in bytes of the shared pool of disk space the quota |
+ // system allows for use by websites using HTML5 storage apis, for |
+ // example an embedder may use 50% of the total volume size. |
+ int64_t pool_size = 0; |
+ |
+ // The amount in bytes of the pool an individual site may consume. The |
+ // value must be less than or equal to the pool_size. |
+ int64_t per_host_quota = 0; |
+ |
+ // The amount of space that should remain available on the storage |
+ // volume. As the volume approaches this limit, the quota system gets |
+ // more aggressive about evicting data. |
+ int64_t should_remain_available = 0; |
+ |
+ // The amount of space that must remain available on the storage |
+ // volume. As the volume approaches this limit, the quota system gets |
+ // very aggressive about disallowing new data. |
+ int64_t must_remain_available = 0; |
+ |
+ // The quota system querries the embedder for the QuataSettings, |
+ // but will rate limit the frequency of the querries to no more than once |
+ // per refresh interval. |
+ base::TimeDelta refresh_interval = base::TimeDelta::Max(); |
+}; |
+ |
+// Function type used to return the settings in response to a |
+// GetQuotaSettingsFunc invocation. If the embedder cannot |
+// produce a settings values, base::nullopt can be returned. |
+using OptionalQuotaSettingsCallback = |
+ base::Callback<void(base::Optional<QuotaSettings>)>; |
+ |
+// Function type used to query the embedder about the quota manager settings. |
+// This function is invoked on the UI thread. |
+using GetQuotaSettingsFunc = |
+ base::Callback<void(const OptionalQuotaSettingsCallback& callback)>; |
+ |
+// Returns settings based on the size of the volume containing the storage |
+// partition and a guestimate of the size required for the OS. The refresh |
+// interval is 60 seconds to accomodate changes to the size of the volume. |
+// Except, in the case of incognito, the poolize and quota values are based |
+// on the amount of physical memory and the rerfresh interval is max'd out. |
+STORAGE_EXPORT |
+base::Optional<storage::QuotaSettings> CalculateNominalDynamicSettings( |
+ const base::FilePath& partition_path, |
+ bool is_incognito); |
+ |
+// Returns settings with a poolsize of zero and no per host quota. |
+inline QuotaSettings GetNoQuotaSettings() { |
+ return QuotaSettings(); |
+} |
+ |
+// Returns settings that provide given |per_host_quota| and a total poolsize of |
+// five times that. |
+inline QuotaSettings GetHardCodedSettings(int64_t per_host_quota) { |
+ return QuotaSettings(per_host_quota * 5, per_host_quota, |
+ per_host_quota, per_host_quota); |
+} |
+ |
+} // namespace storage |
+ |
+#endif // STORAGE_BROWSER_QUOTA_QUOTA_MANAGER_H_ |