--- /dev/null
+/* $XConsortium: Xpoll.h /main/6 1996/12/02 10:25:52 lehors $ */
+
+/*
+
+Copyright (c) 1994 X Consortium
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+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 X CONSORTIUM 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 X Consortium 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 X Consortium.
+
+*/
+
+#ifndef _XPOLL_H_
+#define _XPOLL_H_
+
+#ifndef WIN32
+
+#ifndef USE_POLL
+
+#include <X11/Xos.h>
+#if (defined(SVR4) || defined(CRAY) || defined(AIXV3)) && !defined(FD_SETSIZE)
+#include <sys/select.h>
+#ifdef luna
+#include <sysent.h>
+#endif
+#endif
+/* AIX 4.2 fubar-ed <sys/select.h>, so go to heroic measures to get it */
+#if defined(AIXV4) && !defined(NFDBITS)
+#include <sys/select.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
+
+#ifdef BSD
+# if BSD < 198911 /* 198911 == OSF/1, 199103 == CSRG_BASED */
+# ifndef luna /* and even though on LUNA BSD == 43, it has it */
+typedef struct fd_set {
+ fd_mask fds_bits[howmany(FD_SETSIZE, NFDBITS)];
+} fd_set;
+# endif
+# endif
+#endif
+
+#ifdef hpux /* and perhaps old BSD ??? */
+#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
+
+#ifndef FD_SET
+#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
+#endif
+#ifndef FD_CLR
+#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
+#endif
+#ifndef FD_ISSET
+#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
+#endif
+#ifndef FD_ZERO
+#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p)))
+#endif
+
+/*
+ * The following macros are used by the servers only. There is an
+ * explicit assumption that the bit array in the fd_set is at least
+ * 256 bits long (8 32-bit words). This is true on most modern POSIX
+ * systems. Note that this is merely an optimization for the servers
+ * based on assumptions about the way that file descripters are
+ * allocated on POSIX systems.
+ *
+ * When porting X to new systems it is important to adjust these
+ * macros if the system has fewer than 256 bits in the fd_set bit
+ * array.
+ */
+#define XFD_ANYSET(p) \
+ ((p)->fds_bits[0] || (p)->fds_bits[1] || \
+ (p)->fds_bits[2] || (p)->fds_bits[3] || \
+ (p)->fds_bits[4] || (p)->fds_bits[5] || \
+ (p)->fds_bits[6] || (p)->fds_bits[7])
+
+#define XFD_COPYSET(src,dst) \
+ (dst)->fds_bits[0] = (src)->fds_bits[0]; \
+ (dst)->fds_bits[1] = (src)->fds_bits[1]; \
+ (dst)->fds_bits[2] = (src)->fds_bits[2]; \
+ (dst)->fds_bits[3] = (src)->fds_bits[3]; \
+ (dst)->fds_bits[4] = (src)->fds_bits[4]; \
+ (dst)->fds_bits[5] = (src)->fds_bits[5]; \
+ (dst)->fds_bits[6] = (src)->fds_bits[6]; \
+ (dst)->fds_bits[7] = (src)->fds_bits[7];
+
+#define XFD_ANDSET(dst,b1,b2) \
+ (dst)->fds_bits[0] = ((b1)->fds_bits[0] & (b2)->fds_bits[0]); \
+ (dst)->fds_bits[1] = ((b1)->fds_bits[1] & (b2)->fds_bits[1]); \
+ (dst)->fds_bits[2] = ((b1)->fds_bits[2] & (b2)->fds_bits[2]); \
+ (dst)->fds_bits[3] = ((b1)->fds_bits[3] & (b2)->fds_bits[3]); \
+ (dst)->fds_bits[4] = ((b1)->fds_bits[4] & (b2)->fds_bits[4]); \
+ (dst)->fds_bits[5] = ((b1)->fds_bits[5] & (b2)->fds_bits[5]); \
+ (dst)->fds_bits[6] = ((b1)->fds_bits[6] & (b2)->fds_bits[6]); \
+ (dst)->fds_bits[7] = ((b1)->fds_bits[7] & (b2)->fds_bits[7]);
+
+#define XFD_ORSET(dst,b1,b2) \
+ (dst)->fds_bits[0] = ((b1)->fds_bits[0] | (b2)->fds_bits[0]); \
+ (dst)->fds_bits[1] = ((b1)->fds_bits[1] | (b2)->fds_bits[1]); \
+ (dst)->fds_bits[2] = ((b1)->fds_bits[2] | (b2)->fds_bits[2]); \
+ (dst)->fds_bits[3] = ((b1)->fds_bits[3] | (b2)->fds_bits[3]); \
+ (dst)->fds_bits[4] = ((b1)->fds_bits[4] | (b2)->fds_bits[4]); \
+ (dst)->fds_bits[5] = ((b1)->fds_bits[5] | (b2)->fds_bits[5]); \
+ (dst)->fds_bits[6] = ((b1)->fds_bits[6] | (b2)->fds_bits[6]); \
+ (dst)->fds_bits[7] = ((b1)->fds_bits[7] | (b2)->fds_bits[7]);
+
+#define XFD_UNSET(dst,b1) \
+ (dst)->fds_bits[0] &= ~((b1)->fds_bits[0]); \
+ (dst)->fds_bits[1] &= ~((b1)->fds_bits[1]); \
+ (dst)->fds_bits[2] &= ~((b1)->fds_bits[2]); \
+ (dst)->fds_bits[3] &= ~((b1)->fds_bits[3]); \
+ (dst)->fds_bits[4] &= ~((b1)->fds_bits[4]); \
+ (dst)->fds_bits[5] &= ~((b1)->fds_bits[5]); \
+ (dst)->fds_bits[6] &= ~((b1)->fds_bits[6]); \
+ (dst)->fds_bits[7] &= ~((b1)->fds_bits[7]);
+
+#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; \
+ 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_ */
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