Greg Stoll
dded6b2602
I tested this on my Linux machine and verified that the message shows up if I remove my permission to access /dev/ttyS0, etc. Differential Revision: https://phabricator.services.mozilla.com/D303917
107 lines
3.8 KiB
C++
107 lines
3.8 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 mozilla_dom_SerialPlatformService_h
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#define mozilla_dom_SerialPlatformService_h
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#include "mozilla/DataMutex.h"
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#include "mozilla/Span.h"
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#include "mozilla/dom/SerialPortInfo.h"
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#include "mozilla/dom/SerialTypes.h"
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#include "nsIAsyncInputStream.h"
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#include "nsISupportsImpl.h"
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#include "nsTArray.h"
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namespace mozilla::dom {
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class TestSerialPlatformService;
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class SerialDeviceChangeObserver {
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public:
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NS_INLINE_DECL_PURE_VIRTUAL_REFCOUNTING
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virtual void OnPortConnected(const IPCSerialPortInfo& aPortInfo) = 0;
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virtual void OnPortDisconnected(const nsAString& aPortId) = 0;
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protected:
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virtual ~SerialDeviceChangeObserver() = default;
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};
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class SerialPlatformService {
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public:
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(SerialPlatformService)
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static already_AddRefed<SerialPlatformService> GetInstance();
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virtual nsresult Init() { return NS_OK; }
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virtual void Shutdown();
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bool IsShutdown();
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nsISerialEventTarget* IOThread();
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void AssertIsOnIOThread() {
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MOZ_DIAGNOSTIC_ASSERT(IOThread()->IsOnCurrentThread());
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}
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nsresult EnumeratePorts(SerialPortList& aPorts,
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bool* aLikelyAccessDenied = nullptr);
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nsresult Open(const nsString& aPortId, const IPCSerialOptions& aOptions);
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nsresult Close(const nsString& aPortId);
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nsresult Write(const nsString& aPortId, Span<const uint8_t> aData);
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nsresult Drain(const nsString& aPortId);
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nsresult Flush(const nsString& aPortId, bool aReceive);
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nsresult SetSignals(const nsString& aPortId,
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const IPCSerialOutputSignals& aSignals);
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nsresult GetSignals(const nsString& aPortId, IPCSerialInputSignals& aSignals);
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nsresult GetReadStream(const nsString& aPortId, uint32_t aBufferSize,
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nsIAsyncInputStream** aStream);
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void AddDeviceChangeObserver(SerialDeviceChangeObserver* aObserver);
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void RemoveDeviceChangeObserver(SerialDeviceChangeObserver* aObserver);
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virtual TestSerialPlatformService* AsTestService() { return nullptr; }
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protected:
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SerialPlatformService();
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virtual ~SerialPlatformService() = default;
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void NotifyPortConnected(const IPCSerialPortInfo& aPortInfo);
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void NotifyPortDisconnected(const nsAString& aPortId);
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private:
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static already_AddRefed<SerialPlatformService> GetInstanceImpl();
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virtual nsresult EnumeratePortsImpl(SerialPortList& aPorts,
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bool* aLikelyAccessDenied) = 0;
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virtual nsresult OpenImpl(const nsString& aPortId,
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const IPCSerialOptions& aOptions) = 0;
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virtual nsresult CloseImpl(const nsString& aPortId) = 0;
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virtual nsresult WriteImpl(const nsString& aPortId,
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Span<const uint8_t> aData) = 0;
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virtual nsresult DrainImpl(const nsString& aPortId) = 0;
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virtual nsresult FlushImpl(const nsString& aPortId, bool aReceive) = 0;
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virtual nsresult SetSignalsImpl(const nsString& aPortId,
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const IPCSerialOutputSignals& aSignals) = 0;
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virtual nsresult GetSignalsImpl(const nsString& aPortId,
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IPCSerialInputSignals& aSignals) = 0;
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virtual nsresult GetReadStreamImpl(const nsString& aPortId,
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uint32_t aBufferSize,
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nsIAsyncInputStream** aStream) = 0;
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struct ObserverState {
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bool shutdown = false;
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nsTArray<RefPtr<SerialDeviceChangeObserver>> observers;
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};
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DataMutex<ObserverState> mObserverState{
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"SerialPlatformService::mObserverState"};
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DataMutex<nsCOMPtr<nsISerialEventTarget>> mIOThread{
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"SerialPlatformService::mIOThread"};
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};
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} // namespace mozilla::dom
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#endif // mozilla_dom_SerialPlatformService_h
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