441 lines
12 KiB
Plaintext
441 lines
12 KiB
Plaintext
AfdSpinLock Usage
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~~~~~~~~~~~~~~~~~
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ACCEPT.C
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Function: AfdDeferAccept
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Protects: Endpoint->Common.VcListening.UnacceptedConnectionListHead
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Synopsis: Used when deferring an accept (putting a connection back
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on the endpoint's unaccepted connection queue).
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Strategy: None. Deferring accepted connections is a very low
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frequency operation (and is impossible in WinSock 1.1).
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BIND.C
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Function: AfdRestartGetAddress
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Protects: Endpoint->LocalAddress[Length]
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Synopsis: Used when allocating an endpoint's local address buffer
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to prevent multiple processors from allocating the buffer.
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Strategy: None. AfdGetAddress is only called during bind() and
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getsockname() APIs. The bind() call is certainly more
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interesting than getsockname(), but even bind() is only
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called once per socket, so it is unlikely there would be
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any benefit in tuning this.
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BLKCONN.C
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Function: AfdAddFreeConnection
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Protects: Endpoint->Common.VcListening.FreeConnectionListHead
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Synopsis: Used when adding free connections to the endpoint's
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free connection queue.
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Strategy: Use SLIST for free connection queue.
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Function: AfdFreeConnection
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Protects: Endpoint->Common.VcListening.FreeConnectionListHead
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Synopsis: Used when appending a reused connection to the endpoint's
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free connection queue.
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Strategy: Use SLIST for free connection queue.
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Function: AfdDereferenceConnection
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Protects: Connection->ReferenceCount
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Synopsis: Synchronizes access to reference count member.
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Strategy: Use InterlockedDecrement. If updated value is now zero,
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then acquire AfdSpinLock, and recheck the value for zero.
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If it's still zero, do the usual dereference stuff. This
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will eliminate all spinlock acquisitions on reference/
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dereference except the *last* dereference.
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Function: AfdGetFreeConnection
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Protects: Endpoint->Common.VcListening.FreeConnectionListHead
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Synopsis: Used when removing a free connection from the endpoint's
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free connection queue.
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Strategy: Use SLIST for free connection queue.
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Function: AfdGetReturnedConnection
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Protects: Endpoint->Common.VcListening.ReturnedConnectionListHead
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Synopsis: Used when scanning the returned connection queue for a
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specific sequence number.
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Strategy: None (for now).
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Function: AfdReferenceConnection
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Protects: Connection->ReferenceCount
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Synopsis: Synchronizes access to reference count member.
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Strategy: Use InterlockedIncrement instead.
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BLKENDP.C
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Function: AfdFreeQueuedConnections
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Protects: Endpoint->Common.VcListening.UnacceptedConnectionListHead
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Synopsis: Used when puring the endpoint's unaccepted connection
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queue.
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Strategy: None (for now).
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Function: AfdDereferenceEndpoint
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Protects: Endpoint->ReferenceCount
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Synopsis: Synchronizes access to reference count member.
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Strategy: Use InterlockedDecrement. If updated value is now zero,
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then acquire AfdSpinLock, and recheck the value for zero.
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If it's still zero, do the usual dereference stuff. This
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will eliminate all spinlock acquisitions on reference/
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dereference except the *last* dereference.
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Function: AfdReferenceEndpoint
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Protects: Endpoint->ReferenceCount
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Synopsis: Synchronizes access to reference count member.
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Strategy: Use InterlockedIncrement instead.
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CLOSE.C
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Function: AfdCleanup
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Protects:
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Synopsis:
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Strategy:
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CONNECT.C
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Function: AfdSetupConnectDataBuffers
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Protects: Endpoint->ConnectDataBuffers
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Synopsis: Used to guard connect data buffers when they're moved
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from an endpoint to a connection.
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Strategy: Do the "double compare" trick to avoid acquiring the
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spinlock if there are no connect data buffers on the
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endpoint.
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Function: AfdRestartConnect
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Protects: Connection->ConnectDataBuffers
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Synopsis: Used to guard connect data buffers after a connect
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completes.
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Strategy: Do the "double compare" trick to avoid acquiring the
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spinlock if there are no connect data buffers on the
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connection.
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DISCONN.C
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Function: AfdPartialDisconnect(1)
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Protects: Endpoint->DisconnectMode
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Synopsis: Used to guard the disconnect mode bits when shutting
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down a datagram endpoint.
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Strategy: Test a Bunch-O-Bits in the endpoint, and only if
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at least one of these is nonzero acquire the spinlock,
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then proceed with the current tests.
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Function: AfdPartialDisconnect(2)
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Protects: Connection->Common.Bufferring.Receive[Expedited]BytesTaken
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Synopsis: Used to guard access to the byte counters in the connection
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when receives are shutdown so that the connection can be
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aborted if necessary.
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Strategy: None (for now).
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Function: AfdDisconnectEventHandler
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Protects: Connection->ConnectDataBuffers
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Synopsis: Used to guard disconnect data buffers when a disconnect
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indication is received.
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Strategy: Do the "double compare" trick to avoid acquiring the
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spinlock if there are no connect data buffers on the
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connection.
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Function: AfdBeginAbort
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Protects: Bunch-O-Stuff
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Synopsis:
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Strategy:
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Function: AfdBeginDisconnect
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Protects: Bunch-O-Stuff, including disconnect buffers
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Synopsis:
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Strategy:
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Function: AfdRestartDisconnect
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Protects: DisconnectContext->DisconnectListEntry
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Synopsis: Guards access to AfdDisconnectListHead
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Strategy: AfdDisconnectListHead no longer used. Nuke it!
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LISTEN.C
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Function: AfdWaitForListen
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Protects:
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Synopsis:
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Strategy:
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Function: AfdCancelWaitForListen
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Protects:
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Synopsis:
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Strategy:
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Function: AfdConnectEventHandler
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Protects:
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Synopsis:
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Strategy:
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Function: AfdRestartAccept
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Protects:
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Synopsis:
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Strategy:
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MISC.C
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Function: AfdInsertNewEndpointInList
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Protects:
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Synopsis:
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Strategy:
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Function: AfdRemoveEndpointFromList
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Protects:
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Synopsis:
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Strategy:
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Function: AfdInterlockedRemoveEntryList
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Protects:
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Synopsis:
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Strategy:
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Function: AfdGetConnectData
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Protects:
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Synopsis:
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Strategy:
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Function: AfdSetConnectData
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Protects:
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Synopsis:
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Strategy:
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Function: AfdQueueWorkItem
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Protects:
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Synopsis:
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Strategy:
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Function: AfdDoWork
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Protects:
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Synopsis:
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Strategy:
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POLL.C
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Function: AfdPoll
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Protects:
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Synopsis:
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Strategy:
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Function: AfdCancelPoll
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Protects:
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Synopsis:
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Strategy:
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Function: AfdIndicatePollEvent
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Protects:
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Synopsis:
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Strategy:
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Function: AfdTimeoutPoll
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Protects:
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Synopsis:
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Strategy:
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RECEIVE.C
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Function: AfdReceive
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Protects:
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Synopsis:
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Strategy:
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Function: AfdRestartReceive
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Protects:
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Synopsis:
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Strategy:
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Function: AfdReceiveEventHandler
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Protects:
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Synopsis:
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Strategy:
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Function: AfdReceiveExpeditedEventHandler
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Protects:
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Synopsis:
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Strategy:
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Function: AfdQueryReceiveInformation
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Protects:
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Synopsis:
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Strategy:
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SEND.C
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Function: AfdRestartBufferSend
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Protects: Connection->VcDisconnectIrp
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Synopsis: Used to grab the disconnect IRP off a connection.
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Strategy: Use InterlockedExchange. Will require changes to
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blkconn!AfdFreeConnection.
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AfdBufferSpinLock Usage
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~~~~~~~~~~~~~~~~~~~~~~~
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BUFFER.C
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Function: AfdGetBuffer
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Protects: Afd{Small|Medium|Large}BufferListHead
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Synopsis: Serializes access to the various buffer lists.
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Strategy: Use DaveC's SLIST instead. We'll still need the spinlock
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for PPC.
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Function: AfdReturnBuffer
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Protects: Afd{Small|Medium|Large}BufferListHead
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Synopsis: Serializes access to the various buffer lists.
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Strategy: Use DaveC's SLIST instead. We'll still need the spinlock
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for PPC.
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Endpoint->SpinLock Usage
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~~~~~~~~~~~~~~~~~~~~~~~~
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ACCEPT.C
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Function: AfdAcceptCore
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Protects:
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Synopsis:
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Strategy:
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BLKCONN.C
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Function: AfdAddConnectedReference
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Protects: Connection->ConnectedReferenceAdded
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Synopsis:
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Strategy:
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Function: AfdDeleteConnectedReference
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Protects:
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Synopsis:
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Strategy:
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CLOSE.C
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Function: AfdCleanup
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Protects: Endpoint->{Receive|Peek}DatagramIrpListHead,
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Endpoint->Vc{Receive|Send}IrpListHead,
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Connection->CleanupBegun,
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Endpoint->TransmitIrp
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Synopsis:
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Strategy:
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CONNECT.C
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Function: AfdDoDatagramConnect
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Protects: Endpoint->Common.Datagram.RemoteAddress[Length]
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Synopsis:
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Strategy:
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Function: AfdRestartConnect
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Protects: Connection->ConnectedReferenceAdded
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Synopsis:
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Strategy:
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Function: AfdEnabledFailedConnectEvent
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Protects: Endpoint->EventsEnabled
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Synopsis:
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Strategy:
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DISCONN.C
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Function: AfdDisconnectEventHandler
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Protects: Connection->Vc{Receive|Send}IrpListHead,
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Connection->VcByteCounts
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Synopsis:
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Strategy:
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Function: AfdBeginAbort
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Protects: Connection->Vc{Receive|Send}IrpListHead,
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Synopsis:
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Strategy:
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Function: AfdRestartAbort
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Protects: Connection->Vc{Receive|Send}IrpListHead,
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Synopsis:
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Strategy:
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EVENTSEL.C
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Function: AfdEventSelect
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Protects: Endpoint->EventSelectStuff
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Synopsis:
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Strategy:
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Function: AfdEnumNetworkEvents
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Protects: Endpoint->EventSelectStuff
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Synopsis:
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Strategy:
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FASTIO.C
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Function:
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Protects:
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Synopsis:
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Strategy:
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POLL.C
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Function:
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Protects:
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Synopsis:
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Strategy:
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RECEIVE.C
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Function:
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Protects:
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Synopsis:
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Strategy:
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RECVDG.C
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Function:
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Protects:
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Synopsis:
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Strategy:
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RECVVC.C
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Function:
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Protects:
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Synopsis:
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Strategy:
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SEND.C
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Function:
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Protects:
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Synopsis:
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Strategy:
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TRANFILE.C
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Function:
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Protects:
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Synopsis:
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Strategy:
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