34 lines
1.4 KiB
Plaintext
34 lines
1.4 KiB
Plaintext
|
#ifndef INTVECTHPP
|
||
|
|
#define INTVECTHPP
|
||
|
|
#include <int.h>
|
||
|
|
#include "errn.hpp"
|
||
|
|
|
||
|
|
void default_error(int, char*);
|
||
|
|
typedef int (cdecl *ihandler)(struct INT_DATA *);
|
||
|
|
enum { IV_OK, IV_ALREADY, IV_NOTACTIVE, IV_NOCANDO, IV_FAILURE };
|
||
|
|
enum { INITED = 1, ACTIVE };
|
||
|
|
|
||
|
|
class intvector {
|
||
|
|
unsigned char state; // use bits 1 and 2 for inited and active
|
||
|
|
unsigned char vector; // only 255 vectors max
|
||
|
|
unsigned stack; // stack size needed by current server
|
||
|
|
ihandler intserver; // pointer to current server
|
||
|
|
public:
|
||
|
|
intvector() { state = 0; } // default do-nothing initialiser
|
||
|
|
virtual int install(unsigned, ihandler, unsigned = 256);
|
||
|
|
// install with error checking
|
||
|
|
intvector(unsigned v, ihandler fp, unsigned s = 256) {
|
||
|
|
state = 0;
|
||
|
|
if (install(v,fp,s))
|
||
|
|
default_error(EINTVEC,"intvec - failed to install handler");
|
||
|
|
} // install initialiser - abort on error
|
||
|
|
int suspend(void); // deactivate
|
||
|
|
int reinstate(void); // reactivate
|
||
|
|
virtual int newhandler(ihandler, unsigned);
|
||
|
|
// specify new server
|
||
|
|
unsigned operator()(void) { return vector; } // who am I function
|
||
|
|
unsigned status(void) { return state; } // state access function
|
||
|
|
~intvector() { suspend(); }
|
||
|
|
};
|
||
|
|
#endif
|