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254
include/lib9.h
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254
include/lib9.h
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/*
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* Lib9 is miscellany from the Plan 9 C library that doesn't
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* fit into libutf or into libfmt, but is still missing from traditional
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* Unix C libraries.
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*/
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#ifndef _LIB9H_
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#define _LIB9H_ 1
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#if defined(__cplusplus)
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extern "C" {
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#endif
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <fcntl.h>
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#include <assert.h>
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#include <setjmp.h>
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#ifndef _FMTH_
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# include <fmt.h>
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#endif
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#define nil ((void*)0)
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#define nelem(x) (sizeof(x)/sizeof((x)[0]))
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#define _NEEDUCHAR 1
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#define _NEEDUSHORT 1
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#define _NEEDUINT 1
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#define _NEEDULONG 1
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#if defined(__linux__)
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# include <sys/types.h>
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# if defined(__USE_MISC)
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# undef _NEEDUSHORT
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# undef _NEEDUINT
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# undef _NEEDULONG
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# endif
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#endif
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#if defined(__FreeBSD__)
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# include <sys/types.h>
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# if !defined(_POSIX_SOURCE)
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# undef _NEEDUSHORT
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# undef _NEEDUINT
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# endif
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#endif
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typedef signed char schar;
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typedef unsigned int u32int;
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#ifdef _NEEDUCHAR
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typedef unsigned char uchar;
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#endif
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#ifdef _NEEDUSHORT
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typedef unsigned short ushort;
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#endif
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#ifdef _NEEDUINT
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typedef unsigned int uint;
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#endif
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#ifdef _NEEDULONG
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typedef unsigned long ulong;
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#endif
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typedef unsigned long long uvlong;
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typedef long long vlong;
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/* rfork to create new process running fn(arg) */
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#if defined(__FreeBSD__)
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#undef RFFDG
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#undef RFNOTEG
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#undef RFPROC
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#undef RFMEM
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#undef RFNOWAIT
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#undef RFCFDG
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#endif
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enum
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{
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/* RFNAMEG = (1<<0), */
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/* RFENVG = (1<<1), */
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RFFDG = (1<<2),
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RFNOTEG = (1<<3),
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RFPROC = (1<<4),
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RFMEM = (1<<5),
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RFNOWAIT = (1<<6),
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/* RFCNAMEG = (1<<10), */
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/* RFCENVG = (1<<11), */
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RFCFDG = (1<<12),
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/* RFREND = (1<<13), */
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/* RFNOMNT = (1<<14) */
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};
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extern int ffork(int, void(*)(void*), void*);
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/* wait for processes */
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#define wait _p9wait
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typedef struct Waitmsg Waitmsg;
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struct Waitmsg
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{
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int pid; /* of loved one */
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ulong time[3]; /* of loved one & descendants */
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char *msg;
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};
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extern int await(char*, int);
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extern Waitmsg* wait(void);
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/* synchronization */
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typedef struct Lock Lock;
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struct Lock
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{
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int val;
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};
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extern int _tas(void*);
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extern void lock(Lock*);
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extern void unlock(Lock*);
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extern int canlock(Lock*);
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typedef struct QLp QLp;
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struct QLp
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{
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int inuse;
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QLp *next;
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int state;
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};
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typedef struct QLock QLock;
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struct QLock
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{
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Lock lock;
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int locked;
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QLp *head;
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QLp *tail;
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};
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extern void qlock(QLock*);
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extern void qunlock(QLock*);
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extern int canqlock(QLock*);
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extern void _qlockinit(ulong (*)(ulong, ulong));
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typedef struct RWLock RWLock;
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struct RWLock
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{
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Lock lock;
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int readers;
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int writer;
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QLp *head;
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QLp *tail;
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};
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extern void rlock(RWLock*);
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extern void runlock(RWLock*);
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extern int canrlock(RWLock*);
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extern void wlock(RWLock*);
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extern void wunlock(RWLock*);
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extern int canwlock(RWLock*);
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typedef struct Rendez Rendez;
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struct Rendez
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{
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QLock *l;
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QLp *head;
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QLp *tail;
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};
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extern void rsleep(Rendez*);
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extern int rwakeup(Rendez*);
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extern int rwakeupall(Rendez*);
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extern ulong rendezvous(ulong, ulong);
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/* one of a kind */
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extern void sysfatal(char*, ...);
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extern int nrand(int);
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extern void setmalloctag(void*, ulong);
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extern void setrealloctag(void*, ulong);
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extern void *mallocz(ulong, int);
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extern long readn(int, void*, long);
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extern void exits(char*);
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extern void _exits(char*);
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extern ulong getcallerpc(void*);
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/* string routines */
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extern char* strecpy(char*, char*, char*);
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extern int tokenize(char*, char**, int);
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extern int cistrncmp(char*, char*, int);
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extern int cistrcmp(char*, char*);
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extern char* cistrstr(char*, char*);
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extern int getfields(char*, char**, int, int, char*);
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extern int gettokens(char *, char **, int, char *);
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/* formatting helpers */
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extern int dec64(uchar*, int, char*, int);
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extern int enc64(char*, int, uchar*, int);
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extern int dec32(uchar*, int, char*, int);
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extern int enc32(char*, int, uchar*, int);
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extern int dec16(uchar*, int, char*, int);
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extern int enc16(char*, int, uchar*, int);
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extern int encodefmt(Fmt*);
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/* error string */
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enum
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{
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ERRMAX = 128
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};
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extern void rerrstr(char*, uint);
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extern void werrstr(char*, ...);
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extern int errstr(char*, uint);
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/* compiler directives on plan 9 */
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#define USED(x) if(x){}else{}
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#define SET(x) ((x)=0)
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/* command line */
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extern char *argv0;
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#define ARGBEGIN for((argv0||(argv0=*argv)),argv++,argc--;\
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argv[0] && argv[0][0]=='-' && argv[0][1];\
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argc--, argv++) {\
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char *_args, *_argt;\
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Rune _argc;\
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_args = &argv[0][1];\
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if(_args[0]=='-' && _args[1]==0){\
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argc--; argv++; break;\
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}\
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_argc = 0;\
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while(*_args && (_args += chartorune(&_argc, _args)))\
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switch(_argc)
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#define ARGEND SET(_argt);USED(_argt);USED(_argc);USED(_args);}USED(argv);USED(argc);
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#define ARGF() (_argt=_args, _args="",\
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(*_argt? _argt: argv[1]? (argc--, *++argv): 0))
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#define EARGF(x) (_argt=_args, _args="",\
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(*_argt? _argt: argv[1]? (argc--, *++argv): ((x), abort(), (char*)0)))
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#define ARGC() _argc
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#define OREAD O_RDONLY
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#define OWRITE O_WRONLY
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#define AEXIST 0
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#define AREAD 4
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#define AWRITE 2
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#define AEXEC 1
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#define ORCLOSE 8
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#define OCEXEC 16
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#define dup dup2
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#define exec execv
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#define seek lseek
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#define getwd getcwd
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#if defined(__cplusplus)
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}
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#endif
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#endif /* _LIB9H_ */
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