53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
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/**
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* === DO NOT MODIFY THIS FILE ===
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* If you need some other prototypes or constants in a header, please put them
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* in another header file.
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*
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* When we grade, we will be replacing this file with our own copy.
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* You have been warned.
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* === DO NOT MODIFY THIS FILE ===
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*/
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#ifndef PBX_H
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#define PBX_H
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#include <unistd.h>
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#include <sys/select.h>
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#include "tu.h"
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/*
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* Structure types representing objects manipulated by the PBX module.
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*
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* PBX: Represents the current state of a private branch exchange.
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* TU: Represents the current state of a telephone unit.
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*
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* NOTE: These types are "opaque": the actual structure definitions are not
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* given here and it is not intended that a client of the PBX module should
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* know what they are. The actual structure definitions are local to the
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* implementation of the PBX module and are not exported.
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*/
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typedef struct pbx PBX;
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/*
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* Maximum number of extensions supported by a PBX.
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*/
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#define PBX_MAX_EXTENSIONS FD_SETSIZE
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/*
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* End-of-line sequence used in communication with client.
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*/
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#define EOL "\r\n"
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/*
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* Global variable that provides access to the PBX instance.
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*/
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extern PBX *pbx;
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PBX *pbx_init();
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void pbx_shutdown(PBX *pbx);
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int pbx_register(PBX *pbx, TU *tu, int ext);
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int pbx_unregister(PBX *pbx, TU *tu);
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int pbx_dial(PBX *pbx, TU *tu, int ext);
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#endif
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