122 lines
3.5 KiB
Crystal
122 lines
3.5 KiB
Crystal
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@[Link("ipc")]
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lib LibIPC
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struct Connection
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type : UInt8
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spath : LibC::Char* # [4096] # [PATH_MAX]
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end
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struct Pollfd
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fd : LibC::Int
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events : LibC::Short
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revents : LibC::Short
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end
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struct Ctx
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cinfos : Connection*
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pollfd : Pollfd*
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tx : Messages
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size : LibC::UInt64T
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end
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struct Switching
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origin : LibC::Int
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dest : LibC::Int
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end
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struct Switchings
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collection : Switching*
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size : LibC::UInt
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end
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enum MessageType
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ServerClose
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Error
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Data
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LookUp
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end
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# Messages are stored in lists within the libipc before being sent.
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struct Messages
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messages : Message*
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size : LibC::UInt64T
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end
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struct Message
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type : UInt8 # Internal message type.
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user_type : UInt8 # User-defined message type.
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fd : LibC::Int # fd of the sender.
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length : LibC::UInt # Payload length.
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payload : LibC::Char* #
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end
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enum EventType
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NotSet #
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Error #
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ExtraSocket # Message received from a non IPC socket.
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Switch # Message to send to a corresponding fd.
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Connection # New user.
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Disconnection # User disconnected.
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Message # New message.
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LookUp # Client asking for a service through ipcd.
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Timer # Timeout in the poll(2) function.
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Tx # Message sent.
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end
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struct Event
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type : EventType #
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index : LibC::UInt # Index of the sender in the ipc_ctx structure.
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origin : LibC::Int # fd of the sender.
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message : Message* # Pointer to the reveiced message.
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end
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struct IPCError
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# This is the size of an enumeration in C.
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error_code : UInt32
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error_message : LibC::Char[8192]
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end
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# Connection functions.
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# Context is allocated, ipcd is requested and the connection/initialisation is performed.
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fun ipc_server_init(ctx : Ctx*, sname : LibC::Char*) : IPCError
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fun ipc_connection(Ctx*, LibC::Char*) : IPCError
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# Closing connections.
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fun ipc_close(ctx : Ctx*, index : LibC::UInt64T) : IPCError
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fun ipc_close_all(ctx : Ctx*) # Void
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fun ipc_ctx_free(Ctx*) # Void
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# Loop function.
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fun ipc_events_loop(Ctx*, Event*, LibC::UInt*) : IPCError
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# Adding and removing file discriptors to read.
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fun ipc_add(Ctx*, Connection*, Pollfd*) : IPCError
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fun ipc_del(Ctx*, LibC::UInt) : IPCError
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fun ipc_add_fd(Ctx*, LibC::Int) : IPCError
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fun ipc_del_fd(Ctx*, LibC::Int) : IPCError
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# Sending a message (will wait the fd to become available for IO operations).
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fun ipc_write(Ctx*, Message*) : IPCError
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# This function let the user get the default error message based on the error code.
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# The error message is contained in the IPCError structure, this function should not be used, in most cases.
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fun ipc_errors_get (LibC::Int) : LibC::Char*
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fun ipc_receive_fd (sock : LibC::Int, fd : LibC::Int*) : IPCError
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fun ipc_provide_fd (sock : LibC::Int, fd : LibC::Int ) : IPCError
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fun ipc_switching_add (switch : Switchings*, fd1 : LibC::Int, fd2 : LibC::Int) # Void
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fun ipc_switching_del (switch : Switchings*, fd : LibC::Int ) : LibC::Int
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fun ipc_switching_get (switch : Switchings*, fd : LibC::Int ) : LibC::Int
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fun ipc_switching_free (switch : Switchings* ) # Void
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# non public functions
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fun ipc_read(ctx : Ctx*, index : LibC::UInt, message : Message*) : IPCError
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# for testing purposes
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fun ipc_switching_print (switch : Switchings*) # Void
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fun service_path (path : LibC::Char*, sname : LibC::Char*, index : Int32, version : Int32) : IPCError
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fun ipc_connections_print (Connections*) # Void
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end
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