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Unified Diff: chrome/browser/private_working_set_snapshot.h

Issue 2098713003: Moved a bunch of win-specific files to the new win folder in chrome/browser (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Rebase Created 4 years, 6 months ago
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Index: chrome/browser/private_working_set_snapshot.h
diff --git a/chrome/browser/private_working_set_snapshot.h b/chrome/browser/private_working_set_snapshot.h
deleted file mode 100644
index d4286b14c0a5ee09905de0990673ccf7b3d5780e..0000000000000000000000000000000000000000
--- a/chrome/browser/private_working_set_snapshot.h
+++ /dev/null
@@ -1,122 +0,0 @@
-// Copyright 2015 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 CHROME_BROWSER_PRIVATE_WORKING_SET_SNAPSHOT_H_
-#define CHROME_BROWSER_PRIVATE_WORKING_SET_SNAPSHOT_H_
-
-#include "build/build_config.h"
-
-#if defined(OS_WIN)
-#include <pdh.h>
-#include <stddef.h>
-
-#include <vector>
-
-#include "base/macros.h"
-#include "base/process/process_handle.h"
-#include "base/win/scoped_handle.h"
-
-namespace win {
-
-// The traits class for PDH handles that can be closed via PdhCloseQuery() API.
-struct PDHHandleTraits {
- typedef PDH_HQUERY Handle;
- static PDH_HQUERY NullHandle() { return nullptr; }
- static bool IsHandleValid(PDH_HQUERY handle) { return handle != nullptr; }
- static bool CloseHandle(PDH_HQUERY handle) {
- return (PdhCloseQuery(handle) == ERROR_SUCCESS);
- }
-
- private:
- DISALLOW_IMPLICIT_CONSTRUCTORS(PDHHandleTraits);
-};
-
-// DummyVerifierTraits can be used because PDH_HQUERY is just a typedef for
-// HANDLE. However HandleTraits cannot be used because PdhCloseQuery must be
-// called rather than CloseHandle to dispose of the resources.
-using ScopedPDH =
- base::win::GenericScopedHandle<PDHHandleTraits,
- base::win::DummyVerifierTraits>;
-
-} // namespace win
-
-// This class can be used to do bulk collection of private working sets. This
-// exists because on Windows it is much faster to collect a group of private
-// working sets all at once using PdhOpenQuery than to calculate the private
-// working sets for each process individually.
-class PrivateWorkingSetSnapshot {
- public:
- PrivateWorkingSetSnapshot();
- ~PrivateWorkingSetSnapshot();
-
- // Add a process name that this object should monitor, such as "chrome". All
- // processes whose name starts with this string will be monitored.
- void AddToMonitorList(const std::string& process_name);
-
- // Query the system for working-set information for all monitored processes
- // and update the results cache. This function may take a few ms to run.
- // The time it takes seems to be independent of the number of processes it
- // retrieves data for. This makes it faster than using QueryWorkingSet as soon
- // as the process count exceeds two or three.
- void Sample();
-
- // Ask for the working set for a specific process, from the most recent call
- // to Sample. If no data is available then zero will be returned. The result
- // is in bytes.
- size_t GetPrivateWorkingSet(base::ProcessId process_id) const;
-
- private:
- // Initialize the PDH |query_handle_| and process any pending AddToMonitorList
- // calls.
- void Initialize();
-
- // This holds a pair of Pdh counters to queries for the process ID and private
- // working set for a particular process name being monitored. The results from
- // the two queries can be matched up so that we can associate a private
- // working set with a process ID.
- struct PdhCounterPair {
- // These are bound to query_handle_ and will be freed when it is closed.
- // The handle to the 'counter' that retrieves process IDs.
- PDH_HCOUNTER process_id_handle = nullptr;
- // The handle to the 'counter' that retrieves private working sets.
- PDH_HCOUNTER private_ws_handle = nullptr;
- };
-
- // Struct for storing a process ID and associated private working set.
- struct PidAndPrivateWorkingSet {
- base::ProcessId process_id;
- size_t private_ws;
- // Comparison function for sorting by process ID.
- bool operator<(const PidAndPrivateWorkingSet& other) const {
- // private_ws is intentionally *not* part of the comparison because it is
- // the payload and process_id is the key.
- return process_id < other.process_id;
- }
- // Comparison function for searching by process ID.
- bool operator<(const base::ProcessId other_process_id) const {
- return process_id < other_process_id;
- }
- };
-
- // True if Initialize() has been called, whether it succeeded or not.
- bool initialized_ = false;
-
- // The handle to the query object.
- win::ScopedPDH query_handle_;
-
- // A vector of process names to monitor when initialization occurs.
- std::vector<std::string> process_names_;
-
- // A PdhCounterPair for each successful AddToMonitorList call.
- std::vector<PdhCounterPair> counter_pairs_;
-
- // After each call to Sample this will hold the results, sorted by process id.
- std::vector<PidAndPrivateWorkingSet> records_;
-
- DISALLOW_COPY_AND_ASSIGN(PrivateWorkingSetSnapshot);
-};
-
-#endif // defined(OS_WIN)
-
-#endif // CHROME_BROWSER_PRIVATE_WORKING_SET_SNAPSHOT_H_
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