initial commit
Signed-off-by: Peter Siegmund <mars3142@noreply.mars3142.dev>
This commit is contained in:
366
libs/wxWidgets-3.3.1/interface/wx/ipc.h
Normal file
366
libs/wxWidgets-3.3.1/interface/wx/ipc.h
Normal file
@@ -0,0 +1,366 @@
|
||||
/////////////////////////////////////////////////////////////////////////////
|
||||
// Name: ipc.h
|
||||
// Purpose: interface of wxConnection
|
||||
// Author: wxWidgets team
|
||||
// Licence: wxWindows licence
|
||||
/////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
/**
|
||||
@class wxConnection
|
||||
|
||||
A wxConnection object represents the connection between a client and a server.
|
||||
It is created by making a connection using a wxClient object, or by the acceptance
|
||||
of a connection by a wxServer object.
|
||||
|
||||
The bulk of a DDE-like (Dynamic Data Exchange) conversation is controlled by
|
||||
calling members in a @b wxConnection object or by overriding its members.
|
||||
The actual DDE-based implementation using wxDDEConnection is available on
|
||||
Windows only, but a platform-independent, socket-based version of this API is
|
||||
available using wxTCPConnection, which has the same API.
|
||||
|
||||
An application should normally derive a new connection class from wxConnection,
|
||||
in order to override the communication event handlers to do something interesting.
|
||||
|
||||
@library{wxbase}
|
||||
@category{ipc}
|
||||
|
||||
@see wxClient, wxServer, @ref overview_ipc
|
||||
*/
|
||||
class wxConnection : public wxObject
|
||||
{
|
||||
public:
|
||||
///@{
|
||||
/**
|
||||
Constructs a connection object.
|
||||
|
||||
If no user-defined connection object is to be derived from wxConnection,
|
||||
then the constructor should not be called directly, since the default connection
|
||||
object will be provided on requesting (or accepting) a connection.
|
||||
|
||||
However, if the user defines his or her own derived connection object,
|
||||
the wxServer::OnAcceptConnection and/or wxClient::OnMakeConnection
|
||||
members should be replaced by functions which construct the new
|
||||
connection object.
|
||||
|
||||
If the arguments of the wxConnection constructor are void then
|
||||
the wxConnection object manages its own connection buffer,
|
||||
allocating memory as needed. A programmer-supplied buffer cannot
|
||||
be increased if necessary, and the program will assert if it is
|
||||
not large enough.
|
||||
|
||||
The programmer-supplied buffer is included mainly for backwards compatibility.
|
||||
*/
|
||||
wxConnection();
|
||||
wxConnection(void* buffer, size_t size);
|
||||
///@}
|
||||
|
||||
///@{
|
||||
/**
|
||||
Called by the server application to advise the client of a change
|
||||
in the data associated with the given item. Causes the client
|
||||
connection's OnAdvise() member to be called.
|
||||
|
||||
@return @true if successful.
|
||||
*/
|
||||
bool Advise(const wxString& item, const void* data, size_t size,
|
||||
wxIPCFormat format = wxIPC_PRIVATE);
|
||||
bool Advise(const wxString& item, const char* data);
|
||||
bool Advise(const wxString& item, const wchar_t* data);
|
||||
bool Advise(const wxString& item, const wxString data);
|
||||
///@}
|
||||
|
||||
/**
|
||||
Called by the client or server application to disconnect from the
|
||||
other program; it causes the OnDisconnect() message to be sent to the
|
||||
corresponding connection object in the other program.
|
||||
|
||||
Returns @true if successful or already disconnected.
|
||||
The application that calls Disconnect() must explicitly delete
|
||||
its side of the connection.
|
||||
*/
|
||||
bool Disconnect();
|
||||
|
||||
///@{
|
||||
/**
|
||||
Called by the client application to execute a command on the server.
|
||||
Can also be used to transfer arbitrary data to the server (similar to
|
||||
Poke() in that respect). Causes the server connection's OnExec()
|
||||
member to be called. Returns @true if successful.
|
||||
*/
|
||||
bool Execute(const void* data, size_t size,
|
||||
wxIPCFormat format = wxIPC_PRIVATE);
|
||||
bool Execute(const char* data);
|
||||
bool Execute(const wchar_t* data);
|
||||
bool Execute(const wxString data);
|
||||
///@}
|
||||
|
||||
/**
|
||||
Message sent to the client application when the server notifies it of a
|
||||
change in the data associated with the given item, using Advise().
|
||||
*/
|
||||
virtual bool OnAdvise(const wxString& topic,
|
||||
const wxString& item,
|
||||
const void* data,
|
||||
size_t size,
|
||||
wxIPCFormat format);
|
||||
|
||||
/**
|
||||
Message sent to the client or server application when the other
|
||||
application notifies it to end the connection.
|
||||
|
||||
The default behaviour is to delete the connection object and return @true,
|
||||
so applications should generally override OnDisconnect() (finally calling
|
||||
the inherited method as well) so that they know the connection object is
|
||||
no longer available.
|
||||
*/
|
||||
virtual bool OnDisconnect();
|
||||
|
||||
/**
|
||||
Message sent to the server application when the client notifies
|
||||
it to execute the given data, using Execute().
|
||||
|
||||
Note that there is no item associated with this message.
|
||||
*/
|
||||
virtual bool OnExec(const wxString& topic, const wxString& data);
|
||||
|
||||
/**
|
||||
Message sent to the server application when the client notifies it to
|
||||
accept the given data.
|
||||
*/
|
||||
virtual bool OnPoke(const wxString& topic, const wxString& item,
|
||||
const void* data,
|
||||
size_t size,
|
||||
wxIPCFormat format);
|
||||
|
||||
/**
|
||||
Message sent to the server application when the client calls Request().
|
||||
The server's OnRequest() method should respond by returning a character
|
||||
string, or @NULL to indicate no data, and setting *size.
|
||||
|
||||
The character string must of course persist after the call returns.
|
||||
*/
|
||||
virtual const void* OnRequest(const wxString& topic,
|
||||
const wxString& item,
|
||||
size_t* size,
|
||||
wxIPCFormat format);
|
||||
|
||||
/**
|
||||
Message sent to the server application by the client, when the client
|
||||
wishes to start an 'advise loop' for the given topic and item.
|
||||
The server can refuse to participate by returning @false.
|
||||
*/
|
||||
virtual bool OnStartAdvise(const wxString& topic,
|
||||
const wxString& item);
|
||||
|
||||
/**
|
||||
Message sent to the server application by the client, when the client
|
||||
wishes to stop an 'advise loop' for the given topic and item.
|
||||
The server can refuse to stop the advise loop by returning @false, although
|
||||
this doesn't have much meaning in practice.
|
||||
*/
|
||||
virtual bool OnStopAdvise(const wxString& topic,
|
||||
const wxString& item);
|
||||
|
||||
///@{
|
||||
/**
|
||||
Called by the client application to poke data into the server.
|
||||
Can be used to transfer arbitrary data to the server.
|
||||
Causes the server connection's OnPoke() member to be called.
|
||||
If size is -1 the size is computed from the string length of data.
|
||||
|
||||
Returns @true if successful.
|
||||
*/
|
||||
bool Poke(const wxString& item, const void* data, size_t size,
|
||||
wxIPCFormat format = wxIPC_PRIVATE);
|
||||
bool Poke(const wxString& item, const char* data);
|
||||
bool Poke(const wxString& item, const wchar_t* data);
|
||||
bool Poke(const wxString& item, const wxString data);
|
||||
///@}
|
||||
|
||||
/**
|
||||
Called by the client application to request data from the server.
|
||||
Causes the server connection's OnRequest() member to be called.
|
||||
Size may be @NULL or a pointer to a variable to receive the size of the
|
||||
requested item.
|
||||
|
||||
Returns a character string (actually a pointer to the connection's buffer)
|
||||
if successful, @NULL otherwise. This buffer does not need to be deleted.
|
||||
*/
|
||||
const void* Request(const wxString& item, size_t* size,
|
||||
wxIPCFormat format = wxIPC_TEXT);
|
||||
|
||||
/**
|
||||
Called by the client application to ask if an advise loop can be started
|
||||
with the server. Causes the server connection's OnStartAdvise()
|
||||
member to be called.
|
||||
Returns @true if the server okays it, @false otherwise.
|
||||
*/
|
||||
bool StartAdvise(const wxString& item);
|
||||
|
||||
/**
|
||||
Called by the client application to ask if an advise loop can be stopped.
|
||||
Causes the server connection's OnStopAdvise() member to be called.
|
||||
Returns @true if the server okays it, @false otherwise.
|
||||
*/
|
||||
bool StopAdvise(const wxString& item);
|
||||
|
||||
/**
|
||||
Returns true if the format is one of the text formats.
|
||||
|
||||
The text formats are wxIPC_TEXT, wxIPC_UNICODETEXT and wxIPC_UTF8TEXT.
|
||||
*/
|
||||
static bool IsTextFormat(wxIPCFormat format);
|
||||
|
||||
/**
|
||||
Returns the data in any of the text formats as string.
|
||||
|
||||
@param data
|
||||
The raw data pointer as used with any of the other methods of this
|
||||
class.
|
||||
@param size
|
||||
The size of the data buffer pointed to by @a data.
|
||||
@param format
|
||||
The format of the data. It must be a text one, i.e. such that
|
||||
IsTextFormat() returns @true for it.
|
||||
@return
|
||||
The string representation of the data. If the format is not text,
|
||||
an assertion failure is triggered and empty string is returned.
|
||||
*/
|
||||
static wxString
|
||||
GetTextFromData(const void *data, size_t size, wxIPCFormat format);
|
||||
};
|
||||
|
||||
|
||||
|
||||
/**
|
||||
@class wxClient
|
||||
|
||||
A wxClient object represents the client part of a client-server
|
||||
DDE-like (Dynamic Data Exchange) conversation.
|
||||
The actual DDE-based implementation using wxDDEClient is available on Windows
|
||||
only, but a platform-independent, socket-based version of this API is available
|
||||
using wxTCPClient, which has the same API.
|
||||
|
||||
To create a client which can communicate with a suitable server, you need to
|
||||
derive a class from wxConnection and another from wxClient.
|
||||
The custom wxConnection class will intercept communications in a 'conversation'
|
||||
with a server, and the custom wxClient is required so that a user-overridden
|
||||
wxClient::OnMakeConnection member can return a wxConnection of the required
|
||||
class, when a connection is made.
|
||||
|
||||
Look at the IPC sample and the @ref overview_ipc for an example of how to do this.
|
||||
|
||||
@library{wxbase}
|
||||
@category{ipc}
|
||||
|
||||
@see wxServer, wxConnection, @ref overview_ipc
|
||||
*/
|
||||
class wxClient : public wxObject
|
||||
{
|
||||
public:
|
||||
/**
|
||||
Constructs a client object.
|
||||
*/
|
||||
wxClient();
|
||||
|
||||
/**
|
||||
Tries to make a connection with a server by host (machine name
|
||||
under UNIX - use 'localhost' for same machine; ignored when using
|
||||
native DDE in Windows), service name and topic string.
|
||||
|
||||
If the server allows a connection, a wxConnection object will be returned.
|
||||
The type of wxConnection returned can be altered by overriding the
|
||||
OnMakeConnection() member to return your own derived connection object.
|
||||
|
||||
Under Unix, the service name may be either an integer port
|
||||
identifier in which case an Internet domain socket will be used
|
||||
for the communications, or a valid file name (which shouldn't
|
||||
exist and will be deleted afterwards) in which case a Unix domain
|
||||
socket is created.
|
||||
|
||||
@note Using Internet domain sockets is extremely insecure for IPC as
|
||||
there is absolutely no access control for them, use Unix domain
|
||||
sockets whenever possible!
|
||||
*/
|
||||
wxConnectionBase* MakeConnection(const wxString& host,
|
||||
const wxString& service,
|
||||
const wxString& topic);
|
||||
|
||||
/**
|
||||
Called by MakeConnection(), by default this simply returns a new wxConnection
|
||||
object. Override this method to return a wxConnection descendant customised
|
||||
for the application.
|
||||
|
||||
The advantage of deriving your own connection class is that it will enable
|
||||
you to intercept messages initiated by the server, such as wxConnection::OnAdvise.
|
||||
You may also want to store application-specific data in instances of
|
||||
the new class.
|
||||
*/
|
||||
wxConnectionBase* OnMakeConnection();
|
||||
|
||||
/**
|
||||
Returns @true if this is a valid host name, @false otherwise.
|
||||
This always returns @true under MS Windows.
|
||||
*/
|
||||
bool ValidHost(const wxString& host);
|
||||
};
|
||||
|
||||
|
||||
|
||||
/**
|
||||
@class wxServer
|
||||
|
||||
A wxServer object represents the server part of a client-server DDE-like
|
||||
(Dynamic Data Exchange) conversation. The actual DDE-based implementation
|
||||
using wxDDEServer is available on Windows only, but a platform-independent,
|
||||
socket-based version of this API is available using wxTCPServer, which has
|
||||
the same API.
|
||||
|
||||
To create a server which can communicate with a suitable client, you need to
|
||||
derive a class from wxConnection and another from wxServer.
|
||||
The custom wxConnection class will intercept communications in a 'conversation'
|
||||
with a client, and the custom wxServer is required so that a user-overridden
|
||||
wxServer::OnAcceptConnection member can return a wxConnection of the required
|
||||
class, when a connection is made.
|
||||
Look at the IPC sample and the @ref overview_ipc for an example of how to do this.
|
||||
|
||||
@library{wxbase}
|
||||
@category{ipc}
|
||||
|
||||
@see wxClient, wxConnection, IPC, @ref overview_ipc
|
||||
*/
|
||||
class wxServer
|
||||
{
|
||||
public:
|
||||
/**
|
||||
Constructs a server object.
|
||||
*/
|
||||
wxServer();
|
||||
|
||||
/**
|
||||
Registers the server using the given service name.
|
||||
Under Unix, the service name may be either an integer port identifier in
|
||||
which case an Internet domain socket will be used for the communications,
|
||||
or a valid file name (which shouldn't exist and will be deleted afterwards)
|
||||
in which case a Unix domain socket is created.
|
||||
|
||||
@false is returned if the call failed (for example, the port number is
|
||||
already in use).
|
||||
*/
|
||||
bool Create(const wxString& service);
|
||||
|
||||
/**
|
||||
When a client calls @b MakeConnection, the server receives the
|
||||
message and this member is called. The application should derive a
|
||||
member to intercept this message and return a connection object of
|
||||
either the standard wxConnection type, or (more likely) of a
|
||||
user-derived type.
|
||||
|
||||
If the topic is @b STDIO, the application may wish to refuse the
|
||||
connection. Under UNIX, when a server is created the OnAcceptConnection()
|
||||
message is always sent for standard input and output, but in the context
|
||||
of DDE messages it doesn't make a lot of sense.
|
||||
*/
|
||||
virtual wxConnectionBase* OnAcceptConnection(const wxString& topic);
|
||||
};
|
||||
|
||||
Reference in New Issue
Block a user