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a1bb9d5a19
We have been seeing the stack issue from bug 1776210, but on MacOS 10.12 Sierra. We are increasing stack size for all versions. Differential Revision: https://phabricator.services.mozilla.com/D183611
124 lines
3.5 KiB
C++
124 lines
3.5 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef __nsWifiMonitor__
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#define __nsWifiMonitor__
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#include "nsIWifiMonitor.h"
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#include "nsCOMPtr.h"
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#include "nsProxyRelease.h"
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#include "nsIThread.h"
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#include "nsIRunnable.h"
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#include "nsCOMArray.h"
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#include "nsIWifiListener.h"
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#include "mozilla/Atomics.h"
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#include "mozilla/ReentrantMonitor.h"
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#include "mozilla/Logging.h"
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#include "nsIObserver.h"
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#include "nsTArray.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/Monitor.h"
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#include "WifiScanner.h"
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namespace mozilla {
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class TestWifiMonitor;
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}
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extern mozilla::LazyLogModule gWifiMonitorLog;
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class nsWifiAccessPoint;
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// Period between scans when on mobile network.
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#define WIFI_SCAN_INTERVAL_MS_PREF "network.wifi.scanning_period"
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#ifdef XP_MACOSX
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// Use a larger stack size for the wifi monitor thread of macOS, to
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// accommodate Core WLAN making large stack allocations.
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# define kMacOSWifiMonitorStackSize (512 * 1024)
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#endif
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struct WifiListenerHolder {
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RefPtr<nsIWifiListener> mListener;
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bool mShouldPoll;
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bool mHasSentData = false;
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explicit WifiListenerHolder(nsIWifiListener* aListener,
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bool aShouldPoll = false)
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: mListener(aListener), mShouldPoll(aShouldPoll) {}
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};
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class nsWifiMonitor final : public nsIWifiMonitor, public nsIObserver {
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public:
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NS_DECL_THREADSAFE_ISUPPORTS
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NS_DECL_NSIWIFIMONITOR
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NS_DECL_NSIOBSERVER
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explicit nsWifiMonitor(
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mozilla::UniquePtr<mozilla::WifiScanner>&& aScanner = nullptr);
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private:
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friend class mozilla::TestWifiMonitor;
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~nsWifiMonitor();
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nsresult DispatchScanToBackgroundThread(uint64_t aPollingId = 0,
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uint32_t aWaitMs = 0);
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void Scan(uint64_t aPollingId);
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nsresult DoScan();
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nsresult CallWifiListeners(
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nsTArray<RefPtr<nsIWifiAccessPoint>>&& aAccessPoints,
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bool aAccessPointsChanged);
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nsresult PassErrorToWifiListeners(nsresult rv);
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void Close();
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bool IsBackgroundThread();
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bool ShouldPoll() {
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MOZ_ASSERT(!IsBackgroundThread());
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return (mShouldPollForCurrentNetwork && !mListeners.IsEmpty()) ||
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mNumPollingListeners > 0;
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};
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#ifdef ENABLE_TESTS
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// Test-only function that confirms we "should" be polling. May be wrong
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// if somehow the polling tasks are not set to run on the background
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// thread.
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bool IsPolling() { return mThread && mPollingId; }
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#endif
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// Main thread only.
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nsCOMPtr<nsIThread> mThread;
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// Main thread only.
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nsTArray<WifiListenerHolder> mListeners;
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// Background thread only.
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mozilla::UniquePtr<mozilla::WifiScanner> mWifiScanner;
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// Background thread only. Sorted.
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nsTArray<RefPtr<nsIWifiAccessPoint>> mLastAccessPoints;
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// Wifi-scanning requests may poll, meaning they will run repeatedly on
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// a scheduled time period. If this value is 0 then polling is not running,
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// otherwise, it indicates the "ID" of the polling that is running. if some
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// other polling (with different ID) is running, it will stop, not iterate.
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mozilla::Atomic<uint64_t> mPollingId;
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// Number of current listeners that requested that the wifi scan poll
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// periodically.
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// Main thread only.
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uint32_t mNumPollingListeners = 0;
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// True if the current network type is one that requires polling
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// (i.e. a "mobile" network type).
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// Main thread only.
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bool mShouldPollForCurrentNetwork = false;
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};
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#endif
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