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