Changeset 183 for trunk/src/emx/include/sys/select.h

Timestamp:

May 19, 2003, 4:41:00 AM (22 years ago)

Author:

bird

Message:

#434: Initial tcpip header merges.

File:

• trunk/src/emx/include/sys/select.h (modified) (2 diffs, 1 prop)

trunk/src/emx/include/sys/select.h

@@ -3 +3 @@
 #ifndef _SYS_SELECT_H
 #define _SYS_SELECT_H
+#define _SYS_SELECT_H_
 
 #if defined (__cplusplus)
@@ -8 +9 @@
 #endif
 
+#include <sys/cdefs.h>
+
+/** Define sigset_t here for pselect(). */
+#if !defined (_SIGSET_T)
+#define _SIGSET_T
+typedef unsigned long sigset_t;
+#endif
+
+/** Define the number of file handles in the select buffer.
+ * @remark we might wanna bump this one up a bit... */
 #if !defined (FD_SETSIZE)
-#define FD_SETSIZE      256
+#define FD_SETSIZE 256
 #elif FD_SETSIZE < 256
 #error FD_SETSIZE must be at least 256
 #endif
 
+/** BSD thingy to figure out the size of a bitmap array. */
+#ifndef _howmany
+#define _howmany(a,b)       (((a) + ((b) - 1)) / (b))
+#endif
+#if defined(TCPV40HDRS) && !defined(howmany)
+#define howmany(a,b)        (((a) + ((b) - 1)) / (b))
+#endif
+
 #if !defined (_FD_SET_T)
 #define _FD_SET_T
+/** The base type for the select file descriptor bitmap. */
+typedef unsigned long   __fd_mask;
+/** Number of bits in a byte. */
+#define NBBY        8
+/** Number of bits in a byte. */
+#define _NFDBITS    (sizeof(__fd_mask) * 8)     /* bits per mask */
+/** Select set. */
+typedef struct fd_set
+{
+    __fd_mask   __fds_bits[_howmany(FD_SETSIZE, _NFDBITS)];
+} fd_set;
 
-typedef struct _fd_set
-{
-  unsigned long fds_bits[(FD_SETSIZE+31) / 32];
-} fd_set;
+#if defined(__BSD_VISIBLE) || defined(TCPV40HDRS)
+typedef __fd_mask   fd_mask;
+#define fds_bits    __fds_bits
+#define NFDBITS     _NFDBITS
+#endif
 
 #endif
 
-#define FD_SET(n,s)    ((s)->fds_bits[(n)/32] |=  (1L << ((n) & 0x1f)))
-#define FD_CLR(n,s)    ((s)->fds_bits[(n)/32] &= ~(1L << ((n) & 0x1f)))
-#define FD_ISSET(n,s)  ((s)->fds_bits[(n)/32] &   (1L << ((n) & 0x1f)))
-#define FD_ZERO(s)     (void)memset (s, 0, sizeof (*(s)))
+#ifndef FD_SET
+/** Set a bit in the select file descriptor bitmap. */
+#define FD_SET(n,s)    ((s)->__fds_bits[(n)/_NFDBITS] |=  (1L << ((n) & (_NFDBITS - 1))))
+/** Clear a bit in the select file descriptor bitmap. */
+#define FD_CLR(n,s)    ((s)->__fds_bits[(n)/_NFDBITS] &= ~(1L << ((n) & (_NFDBITS - 1))))
+/** Test if a bit in the select file descriptor bitmap is set. */
+#define FD_ISSET(n,s)  ((s)->__fds_bits[(n)/_NFDBITS] &   (1L << ((n) & (_NFDBITS - 1))))
+/** Initialize the select file descriptor bitmap clearing all bits. */
+#define FD_ZERO(s)     (void)memset(s, 0, sizeof(*(s)))
+#if __BSD_VISIBLE
+/** Copy a select file descriptor bitmap. */
+#define FD_COPY(src,trg) (void)(*(trg) = *(src))
+#endif
+#endif /* !FD_SET */
 
 struct timeval;
+int select (int, struct fd_set *, struct fd_set *, struct fd_set *, struct timeval *);
+int _select (int, struct fd_set *, struct fd_set *, struct fd_set *, struct timeval *);
+void *memset (void *, int, size_t); /* Used by FD_ZERO */
+#ifdef _LIBC_TODO
+/** A slightly different select call which have better time precision and signal support. */
+#warning int pselect(int, fd_set *, fd_set *, fd_set *, const struct timespec *, const sigset_t *);
+#endif
 
-int select (int, struct _fd_set *, struct _fd_set *, struct _fd_set *,
-    struct timeval *);
+#ifdef TCPV40HDRS
+/** This is the TCPIP v4.0 bsd styled select.
+ * Normally it's mapped to select(), but since we don't want any such
+ * confusion we don't.
+ * @remark The normal select() doesn't have socket capabilities int the sys style libc.
+ */
+int _System bsdselect(int, struct fd_set *, struct fd_set *, struct fd_set *, struct timeval *);
+#define os2_select  tcpip40_os2_select
+#endif
+/** This is the TCPIP OS/2 styled select. */
+int _System os2_select(int *, int, int, int, long);
 
-int _select (int, struct _fd_set *, struct _fd_set *, struct _fd_set *,
-    struct timeval *);
-
-void *memset (void *, int, size_t); /* Used by FD_ZERO */
+/* toolkit BSD pollution: */
+#ifndef TCPV40HDRS
+/*
+ * Used to maintain information about processes that wish to be
+ * notified when I/O becomes possible.
+ */
+#pragma pack(1)
+struct selinfo {
+        pid_t   si_pid;         /* process to be notified */
+        short   si_flags;       /* see below */
+};
+#pragma pack()
+#define SI_COLL 0x0001          /* collision occurred */
+#endif /* !TCPV40HDRS */
 
 #if defined (__cplusplus)