2 * Acess2 GUI (AxWin) Version 3
3 * - By John Hodge (thePowersGang)
6 * - Interprocess communication
12 #include <ipcmessages.h>
16 #define AXWIN_PORT 4101
18 #define STATICBUF_SIZE 64
21 typedef struct sIPC_Type tIPC_Type;
22 typedef struct sIPC_Client tIPC_Client;
26 int (*GetIdentSize)(const void *Ident);
27 int (*CompareIdent)(const void *Ident1, const void *Ident2);
28 void (*SendMessage)(const void *Ident, size_t Length, const void *Data);
33 const tIPC_Type *IPCType;
34 const void *Ident; // Stored after structure
43 void IPC_FillSelect(int *nfds, fd_set *set);
44 void IPC_HandleSelect(fd_set *set);
45 int IPC_Type_Datagram_GetSize(const void *Ident);
46 int IPC_Type_Datagram_Compare(const void *Ident1, const void *Ident2);
47 void IPC_Type_Datagram_Send(const void *Ident, size_t Length, const void *Data);
48 int IPC_Type_Sys_GetSize(const void *Ident);
49 int IPC_Type_Sys_Compare(const void *Ident1, const void *Ident2);
50 void IPC_Type_Sys_Send(const void *Ident, size_t Length, const void *Data);
51 void IPC_Handle(const tIPC_Type *IPCType, const void *Ident, size_t MsgLen, tAxWin_IPCMessage *Msg);
54 const tIPC_Type gIPC_Type_Datagram = {
55 IPC_Type_Datagram_GetSize,
56 IPC_Type_Datagram_Compare,
57 IPC_Type_Datagram_Send
59 const tIPC_Type gIPC_Type_SysMessage = {
64 int giNetworkFileHandle = -1;
65 int giMessagesFileHandle = -1;
66 int giIPC_ClientCount;
67 tIPC_Client **gIPC_Clients;
74 giNetworkFileHandle = open("/Devices/ip/loop/udp", OPENFLAG_READ);
75 tmp = AXWIN_PORT; ioctl(giNetworkFileHandle, 4, &tmp); // TODO: Don't hard-code IOCtl number
78 void IPC_FillSelect(int *nfds, fd_set *set)
80 if( giNetworkFileHandle > *nfds ) *nfds = giNetworkFileHandle;
81 FD_SET(giNetworkFileHandle, set);
84 void IPC_HandleSelect(fd_set *set)
86 if( FD_ISSET(giNetworkFileHandle, set) )
88 char staticBuf[STATICBUF_SIZE];
89 int readlen, identlen;
92 readlen = read(giNetworkFileHandle, staticBuf, sizeof(staticBuf));
94 identlen = 4 + Net_GetAddressSize( ((uint16_t*)staticBuf)[1] );
95 msg = staticBuf + identlen;
97 IPC_Handle(&gIPC_Type_Datagram, staticBuf, readlen - identlen, (void*)msg);
98 _SysDebug("IPC_HandleSelect: UDP handled");
101 while(SysGetMessage(NULL, NULL))
104 int len = SysGetMessage(&tid, NULL);
106 SysGetMessage(NULL, data);
108 IPC_Handle(&gIPC_Type_SysMessage, &tid, len, (void*)data);
109 _SysDebug("IPC_HandleSelect: Message handled");
113 int IPC_Type_Datagram_GetSize(const void *Ident)
115 return 4 + Net_GetAddressSize( ((const uint16_t*)Ident)[1] );
118 int IPC_Type_Datagram_Compare(const void *Ident1, const void *Ident2)
121 // - No need to worry about mis-matching sizes, as the size is computed
122 // from the 3rd/4th bytes, hence it will differ before the size is hit.
123 return memcmp(Ident1, Ident2, IPC_Type_Datagram_GetSize(Ident1));
126 void IPC_Type_Datagram_Send(const void *Ident, size_t Length, const void *Data)
128 int identlen = IPC_Type_Datagram_GetSize(Ident);
129 char tmpbuf[ identlen + Length ];
130 memcpy(tmpbuf, Ident, identlen); // Header
131 memcpy(tmpbuf + identlen, Data, Length); // Data
132 // TODO: Handle fragmented packets
133 write(giNetworkFileHandle, tmpbuf, sizeof(tmpbuf));
136 int IPC_Type_Sys_GetSize(const void *Ident)
138 return sizeof(pid_t);
141 int IPC_Type_Sys_Compare(const void *Ident1, const void *Ident2)
143 return *(const int*)Ident1 - *(const int*)Ident2;
146 void IPC_Type_Sys_Send(const void *Ident, size_t Length, const void *Data)
148 SysSendMessage( *(const tid_t*)Ident, Length, Data );
151 // --- Client -> Window Mappings
152 int _CompareClientPtrs(const void *_a, const void *_b)
154 tIPC_Client *a = *(tIPC_Client**)_a;
155 tIPC_Client *b = *(tIPC_Client**)_b;
157 if(a->IPCType < b->IPCType) return -1;
158 if(a->IPCType > b->IPCType) return 1;
160 return a->IPCType->CompareIdent(a->Ident, b->Ident);
163 tIPC_Client *IPC_int_GetClient(const tIPC_Type *IPCType, const void *Ident)
165 int pos; // Position where the new client will be inserted
170 // - Search list of registered clients
176 target.IPCType = IPCType;
177 target.Ident = Ident;
178 ret = ⌖ // Abuse ret to get a pointer
180 div = giIPC_ClientCount;
185 cmp = _CompareClientPtrs(&ret, &gIPC_Clients[pos]);
195 return gIPC_Clients[pos];
197 // Adjust pos to be the index where the new client will be placed
202 // - Create a new client entry
203 ident_size = IPCType->GetIdentSize(Ident);
204 ret = malloc( sizeof(tIPC_Client) + ident_size );
205 if(!ret) return NULL;
206 ret->IPCType = IPCType;
207 ret->Ident = &ret + 1; // Get the end of the structure
208 memcpy( (void*)ret->Ident, Ident, ident_size );
210 // TODO: Register some way of detecting the client disconnecting
211 // > Wait on the thread / register with kernel somehow
212 // > Sockets are easier, but UDP is harder. Might get rid of it
215 giIPC_ClientCount ++;
216 gIPC_Clients = realloc(gIPC_Clients, giIPC_ClientCount*sizeof(tIPC_Client*));
217 memmove(&gIPC_Clients[pos+1], &gIPC_Clients[pos], (giIPC_ClientCount-pos-1) * sizeof(tIPC_Client*));
218 gIPC_Clients[pos] = ret;
223 tWindow *IPC_int_GetWindow(tIPC_Client *Client, uint32_t WindowID)
232 void IPC_int_SetWindow(tIPC_Client *Client, uint32_t WindowID, tWindow *WindowPtr)
237 // --- IPC Message Handlers ---
238 int IPC_Msg_CreateWin(tIPC_Client *Client, tAxWin_IPCMessage *Msg)
240 tIPCMsg_CreateWin *info = (void*)Msg->Data;
241 tWindow *newwin, *parent;
244 // > +1 is for NULL byte on string
245 if( Msg->Size < sizeof(tIPCMsg_CreateWin) + 1 )
247 if( info->Renderer[Msg->Size - sizeof(tIPCMsg_CreateWin)] != '\0' )
250 // - Get the parent window ID
251 parent = IPC_int_GetWindow(Client, Msg->Window);
253 // Catch creating a window with an existing ID
254 if( IPC_int_GetWindow(Client, info->NewWinID) )
257 // - Create the new window, and save its pointer
258 newwin = WM_CreateWindow(parent, info->Flags, info->Renderer);
259 IPC_int_SetWindow(Client, info->NewWinID, newwin);
264 void IPC_Handle(const tIPC_Type *IPCType, const void *Ident, size_t MsgLen, tAxWin_IPCMessage *Msg)
268 _SysDebug("IPC_Handle: (IPCType=%p, Ident=%p, MsgLen=%i, Msg=%p)",
269 IPCType, Ident, MsgLen, Msg);
271 if( MsgLen < sizeof(tAxWin_IPCMessage) )
273 if( MsgLen < sizeof(tAxWin_IPCMessage) + Msg->Size )
276 client = IPC_int_GetClient(IPCType, Ident);
278 switch((enum eAxWin_IPCMessageTypes) Msg->ID)
280 // --- Ping message (reset timeout and get server version)
282 _SysDebug(" IPC_Handle: IPCMSG_PING");
283 if( Msg->Size < 4 ) return;
284 if( Msg->Flags & IPCMSG_FLAG_RETURN )
286 Msg->ID = IPCMSG_PING;
287 Msg->Size = sizeof(tIPCMsg_Return);
288 ((tIPCMsg_Return*)Msg->Data)->Value = AXWIN_VERSION;
289 IPCType->SendMessage(Ident, sizeof(tIPCMsg_Return), Msg);
294 case IPCMSG_CREATEWIN:
295 _SysDebug(" IPC_Handle: IPCMSG_CREATEWIN");
296 IPC_Msg_CreateWin(client, Msg);
299 // --- Unknown message
301 fprintf(stderr, "WARNING: Unknown message %i (%p)\n", Msg->ID, IPCType);
302 _SysDebug("WARNING: Unknown message %i (%p)\n", Msg->ID, IPCType);