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