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/***************************************************************************
Name : COMDEVI.H Comment : Controls Comm interface used by Fax Modem Driver. There are 4 choices. (a) If UCOM is defined, it uses the WIN16 Comm API as exported by USER.EXE (though eventually it gets to COMM.DRV) (b) If UCOM is not defined and VC is defined, it uses the COMM.DRV-like interface exported by DLLSCHED.DLL (which merely serves as a front for VCOMM.386) (c) If neither UCOM nor VC are defined, it uses Win3.1 COMM.DRV export directly. (d) If WIN32 is defined (neither UCOM or VC should be defined at the same time), it uses the WIN32 Comm API
Functions: (see Prototypes just below)
Revision Log Date Name Description -------- ----- ---------------------------------------------------------***************************************************************************/
#pragma optimize("e", off) // "e" is buggy
// must be 8K or less, dues to DEADCOMMTIMEOUT. See fcom.c!!
// maybe not...
// #define COM_INBUFSIZE 16384
// #define COM_OUTBUFSIZE 16384
#define COM_INBUFSIZE 4096
#define COM_OUTBUFSIZE 4096
// #define COM_INBUFSIZE 256
// #define COM_OUTBUFSIZE 256
// #define COM_INBUFSIZE 1024
// #define COM_OUTBUFSIZE 1024
#define BETWEENCALL_THRESH 50
#ifdef DEBUG
# define CALLTHRESH_CONST 50
# define CALLTHRESH_PERBYTE 1
# define BEFORECALL static DWORD t1, t2; t1=GetTickCount();
# define INTERCALL(sz)
/*
# define INTERCALL(sz) if((t1-t2) > BETWEENCALL_THRESH)\
ERRMSG(("!!!Inter API %s delay %ld!!!\r\n", (LPSTR)(sz), (t1-t2)));*/# define AFTERCALL(sz,n) \
t2=GetTickCount();\ if((t2-t1) > (CALLTHRESH_CONST+((DWORD)n)*CALLTHRESH_PERBYTE)) \ ERRMSG(("!!!API %s took %ld!!!\r\n", (LPSTR)(sz), (t2-t1)));#else
# define BEFORECALL
# define AFTERCALL
# define INTERCALL
#endif
#if INVALID_HANDLE_VALUE >= 0 // must be <= 0
#error INVALID_HANDLE_VALUE is >=0. This won't work....
#endif
#define My2ndOpenComm(sz, ph) \
{ BEFORECALL; \ if((*((LPHANDLE)(ph)) = CreateFile((LPCTSTR)(sz), GENERIC_READ|GENERIC_WRITE, \ 0, NULL, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, NULL)) != INVALID_HANDLE_VALUE) \ { \ if(!SetupComm(*((LPHANDLE)(ph)), COM_INBUFSIZE, COM_OUTBUFSIZE)) \ { \ CloseHandle(*((LPHANDLE)(ph))); \ *((LPHANDLE)(ph)) = INVALID_HANDLE_VALUE; \ } \ } \ AFTERCALL("Open", 0); \ } \
#define My2ndCloseComm(h, pn) { BEFORECALL; *(pn) = (!CloseHandle((HANDLE)h)); AFTERCALL("Close",0); }
#define MySetCommState(h,pdcb) (!SetCommState((HANDLE)(h), (pdcb)))
#define MyGetCommState(h,pdcb) (!GetCommState((HANDLE)(h), (pdcb)))
#define OVL_CLEAR(lpovl) \
{ \ if (lpovl) \ { \ (lpovl)->Internal = (lpovl)->InternalHigh=\ (lpovl)->Offset = (lpovl)->OffsetHigh=0; \ if ((lpovl)->hEvent) ResetEvent((lpovl)->hEvent); \ } \ }
#define MySetCommMask(h,mask) (!SetCommMask((HANDLE)(h), (mask)))
#define MyFlushComm(h,q) (!PurgeComm((HANDLE)h, ((q)==0 ? PURGE_TXCLEAR : PURGE_RXCLEAR)))
#define MySetXON(h) (!EscapeCommFunction((HANDLE)(h), SETXON))
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