Date: Wed, 13 Nov 2002 07:31:43 -0500 From: Mike Barcroft <mike@FreeBSD.org> To: standards@FreeBSD.org Cc: Archie Cobbs <archie@dellroad.org> Subject: select.diff for review Message-ID: <20021113073143.A98651@espresso.q9media.com>
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I plan on committing the attached patch to <sys/select.h> soon.
Comments appreciated.
Best regards,
Mike Barcroft
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1. Hide the internals of struct fd_set in standard namespaces.
2. Avoid referencing bcopy() and bzero(), since they may not be in
scope.
Request by: bde (1)
Submitted by: wollman (2)
Index: select.h
===================================================================
RCS file: /work/repo/src/sys/sys/select.h,v
retrieving revision 1.15
diff -u -r1.15 select.h
--- select.h 5 Oct 2002 05:40:48 -0000 1.15
+++ select.h 13 Nov 2002 12:30:23 -0000
@@ -79,18 +79,29 @@
#endif
typedef struct fd_set {
- __fd_mask fds_bits[_howmany(FD_SETSIZE, _NFDBITS)];
+ __fd_mask __fds_bits[_howmany(FD_SETSIZE, _NFDBITS)];
} fd_set;
+#if __BSD_VISIBLE
+#define fds_bits __fds_bits
+#endif
-#define __fdset_mask(n) ((fd_mask)1 << ((n) % _NFDBITS))
+#define __fdset_mask(n) ((__fd_mask)1 << ((n) % _NFDBITS))
#define FD_CLR(n, p) ((p)->fds_bits[(n)/_NFDBITS] &= ~__fdset_mask(n))
#if __BSD_VISIBLE
-/* XXX bcopy() not in scope, so <strings.h> is required; see also FD_ZERO(). */
-#define FD_COPY(f, t) bcopy(f, t, sizeof(*(f)))
+#define FD_COPY(f, t) (void)(*(t) = *(f))
#endif
#define FD_ISSET(n, p) ((p)->fds_bits[(n)/_NFDBITS] & __fdset_mask(n))
#define FD_SET(n, p) ((p)->fds_bits[(n)/_NFDBITS] |= __fdset_mask(n))
-#define FD_ZERO(p) bzero(p, sizeof(*(p)))
+#define FD_ZERO(p) __fd_zero((p), FD_SETSIZE)
+
+static __inline void
+__fd_zero(fd_set *_p, __size_t _n)
+{
+
+ _n = _howmany(_n, _NFDBITS);
+ while (_n > 0)
+ _p->__fds_bits[--_n] = 0;
+}
#ifndef _KERNEL
struct timeval;
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