72 lines
1.3 KiB
C
72 lines
1.3 KiB
C
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#include <winpr/crt.h>
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#include <winpr/comm.h>
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#include <winpr/file.h>
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#include <winpr/synch.h>
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#include <winpr/handle.h>
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int TestCommMonitor(int argc, char* argv[])
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{
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HANDLE hComm;
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DWORD dwError;
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BOOL fSuccess;
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DWORD dwEvtMask;
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OVERLAPPED overlapped;
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LPCSTR lpFileName = "\\\\.\\COM1";
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hComm = CreateFileA(lpFileName, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING,
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FILE_FLAG_OVERLAPPED, NULL);
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if (!hComm || (hComm == INVALID_HANDLE_VALUE))
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{
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printf("CreateFileA failure: %s\n", lpFileName);
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return -1;
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}
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fSuccess = SetCommMask(hComm, EV_CTS | EV_DSR);
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if (!fSuccess)
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{
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printf("SetCommMask failure: GetLastError() = %" PRIu32 "\n", GetLastError());
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return -1;
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}
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ZeroMemory(&overlapped, sizeof(OVERLAPPED));
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if (!(overlapped.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL)))
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{
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printf("CreateEvent failed: GetLastError() = %" PRIu32 "\n", GetLastError());
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return -1;
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}
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if (WaitCommEvent(hComm, &dwEvtMask, &overlapped))
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{
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if (dwEvtMask & EV_DSR)
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{
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printf("EV_DSR\n");
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}
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if (dwEvtMask & EV_CTS)
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{
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printf("EV_CTS\n");
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}
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}
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else
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{
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dwError = GetLastError();
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if (dwError == ERROR_IO_PENDING)
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{
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printf("ERROR_IO_PENDING\n");
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}
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else
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{
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printf("WaitCommEvent failure: GetLastError() = %" PRIu32 "\n", dwError);
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return -1;
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}
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}
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CloseHandle(hComm);
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return 0;
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}
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