select.h

用于嵌入式系统的TCP/IP协议栈及若干服务

/*
*            Copyright (c) 1998-2001 by NETsilicon Inc.
*
*  This software is copyrighted by and is the sole property of
*  NETsilicon.  All rights, title, ownership, or other interests
*  in the software remain the property of NETsilicon.  This
*  software may only be used in accordance with the corresponding
*  license agreement.  Any unauthorized use, duplication, transmission,
*  distribution, or disclosure of this software is expressly forbidden.
*
*  This Copyright notice may not be removed or modified without prior
*  written consent of NETsilicon.
*
*  NETsilicon, reserves the right to modify this software
*  without notice.
*
*  NETsilicon
*  411 Waverley Oaks Road                  USA 781.647.1234
*  Suite 227                               http://www.netsilicon.com
*  Waltham, MA 02452                       [e-mail]
*
*************************************************************************
*  $Name: Fusion 6.52 Fusion 6.51 $
*  $Date: 2001/09/26 10:21:50 $
*  $Source: M:/psisrc/stack/incl/rcs/select.h $
*  $Revision: 1.14 $
**************************************************************************
*  File Description:  Network select definitions
*
**************************************************************************/

#ifndef _SELECT_
#define _SELECT_

#include "config.h"
#include "ccdep.h"
#include "fns_mem.h"

typedef struct sel {
	u16     se_inflags;     /* input/request flags */
	u16     se_outflags;    /* output/reply flags */
	i16     se_fd;          /* holds process local file id */
	i16     se_1reserved;   /* reserved */
	u32     se_user;        /* user-definable value */
	u32     se_2reserved;   /* reserved */
} sel;

#define se_dev  se_2reserved    /* holds kernel file id within the kernel */

/* switch needed to avoid def clashes in files that include rpc_typ.h */
#ifndef __TYPES_RPC_HEADER__

#define	NFDBITS		32

#define	FD_SETSIZE	((MAX_SOCKETS) + 1)

/* Berkeley type */
typedef	struct	fd_set
{
    /* To handle more than 32 sockets we MUST have enough long words.
    */
	u32 fds_bits[((FD_SETSIZE)/(NFDBITS) + 1)];
} fd_set;


#define	FD_SET(n, p)	((p)->fds_bits[(n)/(NFDBITS)] |= (1 << ((n) % (NFDBITS))))
#define	FD_CLR(n, p)	((p)->fds_bits[(n)/(NFDBITS)] &= ~(1 << ((n) % (NFDBITS))))
#define	FD_ISSET(n, p)	((p)->fds_bits[(n)/(NFDBITS)] & (1 << ((n) % (NFDBITS))))
#define FD_ZERO(p)	OS_MEMSET((char *)(p), '\0', sizeof(*(p)))

#endif

/*
 * synchronous (via nselect) or asynchronous (via nselect or notify)
 * notification values.
 */
#define READ_NOTIFY             ((u16)0x1)   /* read data available */
#define WRITE_NOTIFY            ((u16)0x2)   /* write data space available */
#define ACCEPT_NOTIFY           ((u16)0x4)   /* connection request awaits */
#define CLOSE_NOTIFY            ((u16)0x8)   /* close down completed */
#define CONNECT_NOTIFY          ((u16)0x10)  /* connection completed */
#define EXCEPT_NOTIFY           ((u16)0x20)  /* exception has occurred */
#define RSHUTDOWN_NOTIFY        ((u16)0x40)  /* read direction shutdown by peer */
#define TIMEOUT_NOTIFY          ((u16)0x80)  /* request has timed out */
#define WSHUTDOWN_NOTIFY        ((u16)0x100) /* write direction shutdown by peer */
#define URGENT_NOTIFY           ((u16)0x200) /* urgent data available */
#define OOB_NOTIFY              ((u16)0x400) /* out of bounds data */

#define NRCSHD_NOTIFY           ((u16)0x800)    /* NRC-reserved -- shutdown  */

#define SENDQFULL_NOTIFY        ((u16)0x1000)
#define SENDQEMPTY_NOTIFY       ((u16)0x2000)

/* The following is a special internal Fusion code -- not meant to be used by
   applications. */
#define DEADMAN_NOTIFY          ((u16)0x8000)

/* everything except read and write -- mainly for other mask in select() */
#define OTHER_NOTIFY            ((u16)(~(READ_NOTIFY | WRITE_NOTIFY | SENDQEMPTY_NOTIFY)))

typedef struct usel_t {
	u32     usel_1reserved;         /* Reserved to NRC */
	int     (*usel_upfi)(struct usel_t *);
	u32     usel_user;              /* user-defined value */
	u32     usel_wait;              /* time to wait */
	u32     usel_rwait;             /* time remaining */
	i16     usel_cnt;               /* # of sels */
	i16     usel_hit;               /* # of fd's with events pending */
	u16     usel_errno;             /* reason why request failed */
	u16     usel_1pad;
	int     (*usel_pfi)(struct sel * selp, int cnt, u32 time, void * arg);/* user pfi to call asynchronously */
	void    * usel_arg;             /* argument to usel_pfi */
	sel     usel_sels[1];           /* variable len sel array */
} usel_t;

#define usel_nilpfi ((int(*)(sel* selp, int cnt ,u32 time, void * arg)) 0)
#define usel_unilpfi ((int(*)(struct usel_t* up)) 0)

/* macro to yield size of usel structure in bytes */
#define usel_bytes(n)   (sizeof(usel_t) - sizeof(sel) + sizeof(sel)*(n))

#endif /*_SELECT_*/