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/*
Title: Windows application to send an interrupt to Poly
Copyright (c) 2003
David C.J. Matthews
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
This program generates an interrupt Windows Poly/ML program in a similar
way to sending a SIGINT (Control-C) interrupt in Unix.
*/
#include <windows.h>
#include <ddeml.h>
// DDE Commands.
#define INTERRUPT_POLY "[Interrupt]"
#define TERMINATE_POLY "[Terminate]"
// Default DDE service name.
#define POLYMLSERVICE "PolyML"
DWORD dwDDEInstance;
// DDE Callback function.
HDDEDATA CALLBACK DdeCallBack(UINT uType, UINT uFmt, HCONV hconv,
HSZ hsz1, HSZ hsz2, HDDEDATA hdata,
DWORD dwData1, DWORD dwData2)
{
return (HDDEDATA) NULL;
}
void SendDDEMessage(LPCTSTR lpszMessage)
{
HCONV hcDDEConv;
HDDEDATA res;
// Send a DDE message to the process.
DWORD dwInst = dwDDEInstance;
HSZ hszServiceName =
DdeCreateStringHandle(dwInst, POLYMLSERVICE, CP_WINANSI);
hcDDEConv =
DdeConnect(dwInst, hszServiceName, hszServiceName, NULL);
DdeFreeStringHandle(dwInst, hszServiceName);
res =
DdeClientTransaction((LPBYTE)lpszMessage, sizeof(INTERRUPT_POLY),
hcDDEConv, 0L, 0, XTYP_EXECUTE, TIMEOUT_ASYNC, NULL);
if (res) DdeFreeDataHandle(res);
}
// Interrupt the ML process as though control-C had been pressed.
void RunInterrupt()
{
SendDDEMessage(INTERRUPT_POLY);
}
int WINAPI WinMain(
HINSTANCE hInstance, // handle to current instance
HINSTANCE hPrevInstance, // handle to previous instance
LPSTR lpCmdLine, // pointer to command line
int nCmdShow // show state of window
)
{
// Initialise DDE. We only want to be a client.
DdeInitialize(&dwDDEInstance, DdeCallBack,
APPCMD_CLIENTONLY | CBF_SKIP_CONNECT_CONFIRMS | CBF_SKIP_DISCONNECTS, 0);
RunInterrupt();
DdeNameService(dwDDEInstance, 0L, 0L, DNS_UNREGISTER);
// Unitialise DDE.
DdeUninitialize(dwDDEInstance);
return 0;
}
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