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