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CodeBlocksPortable/WATCOM/samples/os2/pdd/devhdr.h

72 lines
2 KiB
C

/*
* Device driver header
*/
#ifdef __cplusplus
extern "C" {
#endif
#if __WATCOMC__ >= 1000
#pragma pack(push,1);
#else
#pragma pack(1);
#endif
/*
* Look at \WATCOM\H\OS2\DEVHDR.INC for a description
* of the Device Driver Header
*/
typedef struct DEVHEADER DEVHEADER;
typedef struct DEVHEADER {
DEVHEADER FAR *next; // next driver in chain
USHORT DAWFlags; // device attribute word
NPVOID StrategyEntry; // offset to strategy routine
NPVOID IDCEntry; // offset to IDC routine
CHAR Name[8]; // driver name
CHAR Reserved[8]; // Reserved
ULONG Capabilities; // Capabilities bit strip
};
/*
* Marks end of DEVHEADER chain
*/
#define FENCE ((DEVHEADER FAR*)0xFFFFFFFFul)
/*
* Constants for device attribute word
*/
typedef enum{
DAW_CHARACTER = 0x8000, // Character device
DAW_IDC = 0x4000, // IDC aware device
DAW_NONIBM = 0x2000, // Non-IBM Block device
DAW_SHARE = 0x1000, // Sharable device
DAW_OPENCLOSE = 0x0800, // Requires open and close requests
DAW_LEVEL3 = 0x0180, // Level 3 device
DAW_LEVEL2 = 0x0100, // Level 2 device
DAW_LEVEL1 = 0x0080, // Level 1 device
DAW_CLOCK = 0x0008, // Clock device
DAW_NUL = 0x0004, // Nul device
DAW_STDOUT = 0x0002, // Standard output device
DAW_STDIN = 0x0001, // Standard input device
} DAW_flags;
/*
* Constants for capabilities bit strip (used by level 3 devices)
*/
typedef enum {
CAP_COMPLETE = 0x00000010, // Supports Init Complete request
CAP_ADD = 0x00000008, // Participates in ADD strategy
CAP_PARALLEL = 0x00000004, // Supports parallel ports
CAP_32BIT = 0x00000002, // Supports addressing above 16MB
CAP_SHUTDOWN = 0x00000001, // Supports IOCtl2 and shutdown
CAP_NULL = 0x00000000, //
} CAP_flags;
#if __WATCOMC__ >= 1000
#pragma pack(pop);
#else
#pragma pack();
#endif
#ifdef __cplusplus
};
#endif