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/* * Mach Operating System * Copyright (c) 1987 Carnegie-Mellon University * All rights reserved. The CMU software License Agreement specifies * the terms and conditions for use and redistribution. */ /* * HISTORY * $Log: param.h,v $ * 07-Jan-93 Mac Gillon (mgillon) at NeXT * Integrated POSIX support * * 02-Apr-90 Avadis Tevanian, Jr. (avie) at NeXT * Increased MAXUPRC to 100 for NeXT. * * 28-Feb-90 Gregg kellogg (gk) at NeXT * Fixed CHECK_SIGNALS macro to take 3 arguments instead of 2. * * Revision 2.12 89/10/11 14:53:22 dlb * Minor macro changes to pass thread to thread_should_halt. * [88/10/18 dlb] * */ /* * Copyright (c) 1982, 1986 Regents of the University of California. * All rights reserved. The Berkeley software License Agreement * specifies the terms and conditions for redistribution. * * @(#)param.h 7.1 (Berkeley) 6/4/86 */ /* SUN_VFS */ /* @(#)param.h 2.2 88/06/09 4.0NFSSRC SMI; */ /* SUN_VFS */ #ifndef _SYS_PARAM_H_ #define _SYS_PARAM_H_ #ifndef BSD #define BSD 43 /* 4.3 * 10, as cpp doesn't do floats */ #endif #define BSD4_3 1 /* * Machine type dependent parameters. */ #include <machine/machparam.h> #define NPTEPG (NBPG/(sizeof (struct pte))) /* * Machine-independent constants */ #define NMOUNT 40 /* est. of # mountable fs for quota calc */ /* NMOUNT must be <= 255 unless c_mdev (cmap.h) is expanded */ #define MSWAPX 15 /* pseudo mount table index for swapdev */ #if NeXT #define MAXUPRC 100 #define NOFILE 256 /* max open files per process */ #else #if defined(multimax) || defined(balance) #define MAXUPRC 100 /* max processes per user */ #else #define MAXUPRC 40 /* max processes per user */ #endif #define NOFILE 64 /* max open files per process */ #endif /* SUN_VFS */ #define MAXLINK 32767 /* max links */ /* SUN_VFS */ #define CANBSIZ 256 /* max size of typewriter line */ #if NeXT #define NCARGS 40960 /* # characters in exec arglist */ #else #define NCARGS 20480 /* # characters in exec arglist */ #endif #define NGROUPS 16 /* max number groups */ #define NOGROUP (gid_t)65535 /* marker for empty group set member */ /* * Priorities */ #define PSWP 0 #define PINOD 10 #define PRIBIO 20 #define PRIUBA 24 #define PZERO 25 #define PPIPE 26 /* SUN_VFS */ #define PVFS 27 /* SUN_VFS */ #define PWAIT 30 #define PLOCK 35 #define PSLEP 40 #define PUSER 50 #define PMASK 0177 #define PCATCH 0400 /* return if sleep interrupted, don't longjmp */ #define NZERO 0 /* * Signals */ #import <sys/signal.h> /* * Return values from tsleep(). */ #define TS_OK 0 /* normal wakeup */ #define TS_TIME 1 /* timed-out wakeup */ #define TS_SIG 2 /* asynchronous signal wakeup */ /* * Check for per-process and per thread signals. */ #define SHOULDissig(p,uthreadp) \ (((p)->p_sig | (uthreadp)->uu_sig) && ((p)->p_flag&STRC || \ (((p)->p_sig | (uthreadp)->uu_sig) &~ \ ((p)->p_sigignore | (p)->p_sigmask)))) /* * Check for signals, handling possible stop signals. * Ignores signals already 'taken' and per-thread signals. * Use before and after thread_block() in sleep(). * (p) is always current process. */ #if NeXT #define ISSIG(p) (thread_should_halt(current_thread()) || \ (SHOULDissig(p,current_thread()->_uthread) && issig(0))) #define ISSIG_CATCH(p) (thread_should_halt(current_thread()) || \ (SHOULDissig(p,current_thread()->_uthread) && issig(1))) #else #define ISSIG(p) (thread_should_halt(current_thread()) || \ (SHOULDissig(p,current_thread()->_uthread) && issig())) #endif /* * Check for signals, including signals already taken and * per-thread signals. Use in trap() and syscall() before * exiting kernel. */ #define CHECK_SIGNALS(p, thread, uthreadp) \ (!thread_should_halt(thread) \ && ((p)->p_cursig \ || SHOULDissig(p,uthreadp))) #define NBPW sizeof(int) /* number of bytes in an integer */ #ifndef NULL #if defined(__STRICT_BSD__) || defined(KERNEL) #undef NULL #define NULL 0 #else /* __STRICT_BSD__ || KERNEL */ #import <stddef.h> #endif /* __STRICT_BSD__ || KERNEL */ #endif /* NULL */ #define CMASK 022 /* default mask for file creation */ #define NODEV (dev_t)(-1) /* * Clustering of hardware pages on machines with ridiculously small * page sizes is done here. The paging subsystem deals with units of * CLSIZE pte's describing NBPG (from vm.h) pages each. * * NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ #define CLBYTES (CLSIZE*NBPG) #define CLOFSET (CLSIZE*NBPG-1) /* for clusters, like PGOFSET */ #define claligned(x) ((((int)(x))&CLOFSET)==0) #define CLOFF CLOFSET #define CLSHIFT (PGSHIFT+CLSIZELOG2) #if CLSIZE==1 #define clbase(i) (i) #define clrnd(i) (i) #else /* give the base virtual address (first of CLSIZE) */ #define clbase(i) ((i) &~ (CLSIZE-1)) /* round a number of clicks up to a whole cluster */ #define clrnd(i) (((i) + (CLSIZE-1)) &~ (CLSIZE-1)) #endif /* CBLOCK is the size of a clist block, must be power of 2 */ #define CBLOCK 64 #define CBQSIZE (CBLOCK/NBBY) /* Quote bytes/cblock - can do better. */ /* Data chars/clist. */ #define CBSIZE (CBLOCK - sizeof(struct cblock *) - CBQSIZE) #define CROUND (CBLOCK - 1) /* clist rounding */ #ifndef __ASSEMBLER__ #import <sys/types.h> #endif /* * File system parameters and macros. * * The file system is made out of blocks of at most MAXBSIZE units, * with smaller units (fragments) only in the last direct block. * MAXBSIZE primarily determines the size of buffers in the buffer * pool. It may be made larger without any effect on existing * file systems; however making it smaller make make some file * systems unmountable. * * Note that the blocked devices are assumed to have DEV_BSIZE * "sectors" and that fragments must be some multiple of this size. * Block devices are read in BLKDEV_IOSIZE units. This number must * be a power of two and in the range of * DEV_BSIZE <= BLKDEV_IOSIZE <= MAXBSIZE * This size has no effect upon the file system, but is usually set * to the block size of the root file system, so as to maximize the * speed of ``fsck''. */ #define MAXBSIZE 8192 #define BLKDEV_IOSIZE 2048 #define MAXFRAG 8 #if NeXT #define btodb(bytes, blocksize) ((unsigned int) ((bytes) / (blocksize))) #define dbtob(block, blocksize) ((unsigned int) ((block) * (blocksize))) #else #define DEV_BSIZE 512 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ ((unsigned)(bytes) >> DEV_BSHIFT) #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ ((unsigned)(db) << DEV_BSHIFT) /* * Map a ``block device block'' to a file system block. * This should be device dependent, and will be after we * add an entry to cdevsw for that purpose. For now though * just use DEV_BSIZE. */ #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) #endif /* * MAXPATHLEN defines the longest permissable path length * after expanding symbolic links. It is used to allocate * a temporary buffer from the buffer pool in which to do the * name expansion, hence should be a power of two, and must * be less than or equal to MAXBSIZE. * MAXSYMLINKS defines the maximum number of symbolic links * that may be expanded in a path name. It should be set high * enough to allow all legitimate uses, but halt infinite loops * reasonably quickly. */ #define MAXPATHLEN 1024 #define MAXSYMLINKS 20 /* * bit map related macros */ #define setbit(a,i) (*(((char *)(a)) + ((i)/NBBY)) |= 1<<((i)%NBBY)) #define clrbit(a,i) (*(((char *)(a)) + ((i)/NBBY)) &= ~(1<<((i)%NBBY))) #define isset(a,i) (*(((char *)(a)) + ((i)/NBBY)) & (1<<((i)%NBBY))) #define isclr(a,i) ((*(((char *)(a)) + ((i)/NBBY)) & (1<<((i)%NBBY))) == 0) #if !defined(__vax__) && !defined(__i386__) #define _bit_set(i,a) setbit(a,i) #define _bit_clear(i,a) clrbit(a,i) #define _bit_tst(i,a) isset(a,i) #endif /* * Macros for fast min/max. */ #ifndef MIN #define MIN(a,b) (((a)<(b))?(a):(b)) #endif #ifndef MAX #define MAX(a,b) (((a)>(b))?(a):(b)) #endif /* * Macros for counting and rounding. */ #ifndef howmany #define howmany(x, y) (((x)+((y)-1))/(y)) #endif #define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) /* SUN_VFS */ /* * Scale factor for scaled integers used to count * %cpu time and load averages. */ #define FSHIFT 8 /* bits to right of fixed binary point */ #define FSCALE (1<<FSHIFT) /* SUN_VFS */ /* * Maximum size of hostname recognized and stored in the kernel. */ #define MAXHOSTNAMELEN 256 #define MAXDOMNAMELEN 256 /* maximum domain name length */ #define DEFAULTHOSTNAME "localhost" #endif
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.