2 * AxWin4 Interface Library
3 * - By John Hodge (thePowersGang)
8 #include <axwin4/axwin.h>
9 #include "include/common.hpp"
10 #include "include/IIPCChannel.hpp"
11 #include "include/CIPCChannel_AcessIPCPipe.hpp"
12 #include <ipc_proto.hpp>
22 IIPCChannel* gIPCChannel;
23 ::std::mutex glSyncReply;
24 bool gSyncReplyActive;
26 CDeserialiser gSyncReplyBuf;
28 extern "C" bool AxWin4_Connect(const char *URI)
30 _SysDebug("AxWin4_Connect('%s')", URI);
35 if( strncmp(URI, "ipcpipe://", 3+4+3) == 0 )
37 gIPCChannel = new CIPCChannel_AcessIPCPipe(URI+3+4+3);
41 _SysDebug("Unknown protocol");
45 catch( const ::std::exception& e )
47 fprintf(stderr, "AxWin4_Connect: %s\n", e.what());
53 extern "C" bool AxWin4_PeekEventQueue(void)
58 extern "C" bool AxWin4_WaitEventQueue(uint64_t Timeout)
60 return AxWin4_WaitEventQueueSelect(0, NULL, NULL, NULL, Timeout);
63 extern "C" bool AxWin4_WaitEventQueueSelect(int nFDs, fd_set *rfds, fd_set *wfds, fd_set *efds, uint64_t Timeout)
71 int64_t select_timeout = Timeout;
72 int64_t *select_timeout_p = (Timeout ? &select_timeout : 0);
74 nFDs = ::std::max(nFDs, gIPCChannel->FillSelect(*rfds));
75 _SysSelect(nFDs, rfds, wfds, efds, select_timeout_p, 0);
76 return gIPCChannel->HandleSelect(*rfds);
79 void SendMessage(CSerialiser& message)
81 gIPCChannel->Send(message);
83 void RecvMessage(CDeserialiser& message)
85 uint8_t id = message.ReadU8();
86 _SysDebug("RecvMessage: id=%i", id);
90 // Flag reply and take a copy of this message
91 if( !gSyncReplyActive )
93 _SysDebug("Unexpected reply message %i", message.ReadU8());
95 else if( gSyncReplyValid )
97 // Oh... that was unexpected
98 _SysDebug("Unexpected second reply message %i", message.ReadU8());
102 gSyncReplyValid = true;
103 gSyncReplyBuf = message;
107 _SysDebug("TODO: RecvMessage(%i)", id);
112 CDeserialiser GetSyncReply(CSerialiser& request, unsigned int Message)
114 ::std::lock_guard<std::mutex> lock(glSyncReply);
115 gSyncReplyActive = true;
116 gSyncReplyValid = false;
117 // Send once lock is acquired
118 SendMessage(request);
120 while( !gSyncReplyValid )
123 if( !AxWin4_WaitEventQueue(0) )
124 throw ::std::runtime_error("Connection dropped while waiting for reply");
126 gSyncReplyActive = false;
128 uint8_t id = gSyncReplyBuf.ReadU8();
131 _SysDebug("Unexpected reply message id=%i, expected %i",
133 throw ::std::runtime_error("Sequencing error, unexpected reply");
136 // Use move to avoid copying
137 return ::std::move(gSyncReplyBuf);
140 extern "C" void AxWin4_GetScreenDimensions(unsigned int ScreenIndex, unsigned int *Width, unsigned int *Height)
143 req.WriteU8(IPCMSG_GETGLOBAL);
144 req.WriteU16(IPC_GLOBATTR_SCREENDIMS);
145 req.WriteU8(ScreenIndex);
147 CDeserialiser response = GetSyncReply(req, IPCMSG_GETGLOBAL);
148 if( response.ReadU16() != IPC_GLOBATTR_SCREENDIMS ) {
152 *Width = response.ReadU16();
153 *Height = response.ReadU16();
155 _SysDebug("AxWin4_GetScreenDimensions: %i = %ix%i", ScreenIndex, *Width, *Height);
158 IIPCChannel::~IIPCChannel()
162 }; // namespace AxWin