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Diffstat (limited to 'X11/Xpoll.h')
| -rw-r--r-- | X11/Xpoll.h | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/X11/Xpoll.h b/X11/Xpoll.h new file mode 100644 index 000000000..feb1112cf --- /dev/null +++ b/X11/Xpoll.h @@ -0,0 +1,255 @@ +/* $Xorg: Xpoll.h,v 1.4 2001/02/09 02:03:23 xorgcvs Exp $ */ + +/* + +Copyright 1994, 1998 The Open Group + +Permission to use, copy, modify, distribute, and sell this software and its +documentation for any purpose is hereby granted without fee, provided that +the above copyright notice appear in all copies and that both that +copyright notice and this permission notice appear in supporting +documentation. + +The above copyright notice and this permission notice shall be included +in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR +OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, +ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR +OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the name of The Open Group shall +not be used in advertising or otherwise to promote the sale, use or +other dealings in this Software without prior written authorization +from The Open Group. + +*/ + +/* + * Copyright © 2005 Daniel Stone + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that + * copyright notice and this permission notice appear in supporting + * documentation, and that the name of Daniel Stone not be used in advertising + * or publicity pertaining to distribution of the software without specific, + * written prior permission. Daniel Stone makes no representations about the + * suitability of this software for any purpose. It is provided "as is" + * without express or implied warranty. + * + * DANIEL STONE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING + * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL + * DANIEL STONE BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR + * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER + * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +*/ + +/* $XFree86: xc/include/Xpoll.h,v 3.8 2001/01/17 17:53:11 dawes Exp $ */ + +#ifndef _XPOLL_H_ +#define _XPOLL_H_ + +#ifndef WIN32 + +#ifndef USE_POLL + +#include <X11/Xos.h> + +/* Below is the monster branch from hell. Basically, most systems will drop to + * 'the branch below is the fallthrough for halfway modern systems', and include + * <sys/select.h>, so we get the FD_* macros. */ +#if !defined(DGUX) +# if (defined(SVR4) || defined(CRAY) || defined(AIXV3)) && !defined(FD_SETSIZE) +# include <sys/select.h> +# ifdef luna +# include <sysent.h> +# endif +# else /* not SVR4/CRAY/AIXv3 */ +# if defined(AIXV4) /* AIX 4.2 fubar-ed <sys/select.h>, so try really hard. */ +# if !defined(NFDBITS) +# include <sys/select.h> +# endif +# else /* the branch below is the fallthrough for halfway modern systems */ +# ifdef __QNX__ /* Make sure we get 256 bit select masks */ +# define FD_SETSIZE 256 +# endif +# include <sys/select.h> +# endif +# endif +#else /* DGUX -- No sys/select in Intel DG/ux */ +# include <sys/time.h> +# include <sys/types.h> +# include <unistd.h> +#endif + +#include <X11/Xmd.h> + +#ifdef CSRG_BASED +#include <sys/param.h> +# if BSD < 199103 +typedef long fd_mask; +# endif +#endif + +#define XFD_SETSIZE 256 + +#ifndef FD_SETSIZE +#define FD_SETSIZE XFD_SETSIZE +#endif + +#ifndef NBBY +#define NBBY 8 /* number of bits in a byte */ +#endif + +#ifndef NFDBITS +#define NFDBITS (sizeof(fd_mask) * NBBY) /* bits per mask */ +#endif + +#ifndef howmany +#define howmany(x,y) (((x)+((y)-1))/(y)) +#endif + +#if defined(BSD) && BSD < 198911 && !defined(luna) +typedef struct fd_set { + fd_mask fds_bits[howmany(FD_SETSIZE, NFDBITS)]; +} fd_set; +#endif + +#ifndef hpux /* and perhaps old BSD ??? */ +# define Select(n,r,w,e,t) select(n,(fd_set*)r,(fd_set*)w,(fd_set*)e,(struct timeval*)t) +#else +# ifndef _XPG4_EXTENDED /* HPUX 9.x and earlier */ +# define Select(n,r,w,e,t) select(n,(int*)r,(int*)w,(int*)e,(struct timeval*)t) +# else +# define Select(n,r,w,e,t) select(n,(fd_set*)r,(fd_set*)w,(fd_set*)e,(struct timeval*)t) +# endif +#endif + +#define __X_FDS_BITS fds_bits + +#ifndef __FDS_BITS +# define __FDS_BITS(p) ((p)->__X_FDS_BITS) +#endif + +#define __XFDS_BITS(p, n) (__FDS_BITS(p))[n] + +#ifndef FD_SET +#define FD_SET(n, p) (__XFDS_BITS(p, ((n)/NFDBITS)) |= ((fd_mask)1 << ((n) % NFDBITS))) +#endif +#ifndef FD_CLR +#define FD_CLR(n, p) (__XFDS_BITS((p), ((n)/NFDBITS)) &= ~((fd_mask)1 << ((n) % NFDBITS))) +#endif +#ifndef FD_ISSET +#define FD_ISSET(n, p) ((__XFDS_BITS((p), ((n)/NFDBITS))) & ((fd_mask)1 << ((n) % NFDBITS))) +#endif +#ifndef FD_ZERO +#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p))) +#endif + +/* + * The howmany(FD_SETSIZE, NFDBITS) computes the number of elements in the + * array. before accessing an element in the array we check it exists. + * If it does not exist then the compiler discards the code to access it. + */ +#define XFD_ANYSET(p) \ + ((howmany(FD_SETSIZE, NFDBITS) > 0 && (__XFDS_BITS(p, 0))) || \ + (howmany(FD_SETSIZE, NFDBITS) > 1 && (__XFDS_BITS(p, 1))) || \ + (howmany(FD_SETSIZE, NFDBITS) > 2 && (__XFDS_BITS(p, 2))) || \ + (howmany(FD_SETSIZE, NFDBITS) > 3 && (__XFDS_BITS(p, 3))) || \ + (howmany(FD_SETSIZE, NFDBITS) > 4 && (__XFDS_BITS(p, 4))) || \ + (howmany(FD_SETSIZE, NFDBITS) > 5 && (__XFDS_BITS(p, 5))) || \ + (howmany(FD_SETSIZE, NFDBITS) > 6 && (__XFDS_BITS(p, 6))) || \ + (howmany(FD_SETSIZE, NFDBITS) > 7 && (__XFDS_BITS(p, 7)))) + +#define XFD_COPYSET(src,dst) { \ + int __i__; \ + for (__i__ = 0; __i__ < howmany(FD_SETSIZE, NFDBITS); __i__++) \ + __XFDS_BITS((dst), __i__) = __XFDS_BITS((src), __i__); \ + } +#define XFD_ANDSET(dst,b1,b2) { \ + int __i__; \ + for (__i__ = 0; __i__ < howmany(FD_SETSIZE, NFDBITS); __i__++) \ + __XFDS_BITS((dst), __i__) = ((__XFDS_BITS((b1), __i__)) & (__XFDS_BITS((b2), __i__))); \ + } +#define XFD_ORSET(dst,b1,b2) { \ + int __i__; \ + for (__i__ = 0; __i__ < howmany(FD_SETSIZE, NFDBITS); __i__++) \ + __XFDS_BITS((dst), __i__) = ((__XFDS_BITS((b1), __i__)) | (__XFDS_BITS((b2), __i__))); \ + } +#define XFD_UNSET(dst,b1) { \ + int __i__; \ + for (__i__ = 0; __i__ < howmany(FD_SETSIZE, NFDBITS); __i__++) \ + __XFDS_BITS((dst), __i__) &= ~(__XFDS_BITS((b1), __i__)); \ + } + +#else /* USE_POLL */ +#include <sys/poll.h> +#endif /* USE_POLL */ + +#else /* WIN32 */ + +#define XFD_SETSIZE 256 +#ifndef FD_SETSIZE +#define FD_SETSIZE XFD_SETSIZE +#endif +#include <X11/Xwinsock.h> + +#define Select(n,r,w,e,t) select(0,(fd_set*)r,(fd_set*)w,(fd_set*)e,(struct timeval*)t) + +#define XFD_SETCOUNT(p) (((fd_set FAR *)(p))->fd_count) +#define XFD_FD(p,i) (((fd_set FAR *)(p))->fd_array[i]) +#define XFD_ANYSET(p) XFD_SETCOUNT(p) + +#define XFD_COPYSET(src,dst) { \ + u_int __i; \ + FD_ZERO(dst); \ + for (__i = 0; __i < XFD_SETCOUNT(src) ; __i++) { \ + XFD_FD(dst,__i) = XFD_FD(src,__i); \ + } \ + XFD_SETCOUNT(dst) = XFD_SETCOUNT(src); \ +} + +#define XFD_ANDSET(dst,b1,b2) { \ + u_int __i; \ + FD_ZERO(dst); \ + for (__i = 0; __i < XFD_SETCOUNT(b1) ; __i++) { \ + if (FD_ISSET(XFD_FD(b1,__i), b2)) \ + FD_SET(XFD_FD(b1,__i), dst); \ + } \ +} + +#define XFD_ORSET(dst,b1,b2) { \ + u_int __i; \ + if (dst != b1) XFD_COPYSET(b1,dst); \ + for (__i = 0; __i < XFD_SETCOUNT(b2) ; __i++) { \ + if (!FD_ISSET(XFD_FD(b2,__i), dst)) \ + FD_SET(XFD_FD(b2,__i), dst); \ + } \ +} + +/* this one is really sub-optimal */ +#define XFD_UNSET(dst,b1) { \ + u_int __i; \ + for (__i = 0; __i < XFD_SETCOUNT(b1) ; __i++) { \ + FD_CLR(XFD_FD(b1,__i), dst); \ + } \ +} + +/* we have to pay the price of having an array here, unlike with bitmasks + calling twice FD_SET with the same fd is not transparent, so be careful */ +#undef FD_SET +#define FD_SET(fd,set) do { \ + if (XFD_SETCOUNT(set) < FD_SETSIZE && !FD_ISSET(fd,set)) \ + XFD_FD(set,XFD_SETCOUNT(set)++)=(fd); \ +} while(0) + +#define getdtablesize() FD_SETSIZE + +#endif /* WIN32 */ + +#endif /* _XPOLL_H_ */ |