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osdep.h

/*
 * Copyright 1993 Network Computing Devices, Inc.
 *
 * 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 Network Computing Devices, Inc. not be
 * used in advertising or publicity pertaining to distribution of this 
 * software without specific, written prior permission.
 * 
 * THIS SOFTWARE IS PROVIDED `AS-IS'.  NETWORK COMPUTING DEVICES, INC.,
 * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT
 * LIMITATION ALL IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE, OR NONINFRINGEMENT.  IN NO EVENT SHALL NETWORK
 * COMPUTING DEVICES, INC., BE LIABLE FOR ANY DAMAGES WHATSOEVER, INCLUDING
 * SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES, INCLUDING LOSS OF USE, DATA,
 * OR PROFITS, EVEN IF ADVISED OF THE POSSIBILITY THEREOF, AND REGARDLESS OF
 * WHETHER IN AN ACTION IN CONTRACT, TORT OR NEGLIGENCE, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 * 
 * $NCDId: @(#)osdep.h,v 1.3 1994/05/27 03:10:46 greg Exp $
 */
/***********************************************************
Some portions derived from:

Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts,
and the Massachusetts Institute of Technology, Cambridge, Massachusetts.

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and its 
documentation for any purpose and without fee is hereby granted, 
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 names of Digital or MIT not be
used in advertising or publicity pertaining to distribution of the
software without specific, written prior permission.  

DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
DIGITAL 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.

******************************************************************/

#ifdef AMOEBA
#include <stddef.h>
#include <amoeba.h>
#include <stdio.h>
#include <assert.h>
#include <semaphore.h>
#include <circbuf.h>
#include <exception.h>
#include <vc.h>
#include <fault.h>
#include <module/signals.h>
#include <server/x11/Xamoeba.h>

#include "X.h"
#include "misc.h"
#include "dixstruct.h"
#endif /* AMOEBA */

#define BOTIMEOUT 200 /* in milliseconds */
#define BUFSIZE 4096
#define BUFWATERMARK 8192
#ifndef MAXBUFSIZE
#define MAXBUFSIZE (1 << 22)
#endif

#ifndef sgi     /* SGI defines OPEN_MAX in a useless way */
#ifndef X_NOT_POSIX
#ifdef _POSIX_SOURCE
#include <limits.h>
#else
#define _POSIX_SOURCE
#include <limits.h>
#undef _POSIX_SOURCE
#endif
#endif
#endif

#ifdef AMOEBA
/*
 * Some fundamental constants
 */
#define CONNECTOR_STACK 4000  /* stack for connector task */
#define DEVREADER_STACK 4000  /* stack for device reader */
#define CREATOR_STACK   4000  /* stack for connection creator */
#define MAXTASKS  100   /* Maximum # clients */

/*
 * OsComm status bits
 */
#define     CONN_KILLED 01    /* Connection being closed */
#define     REQ_PUSHBACK      02    /* Request pushed back */
#define     IGNORE            04    /* True if client ignored */
#endif /* AMOEBA */

/*
 * Just to prevent confusion, I ifdef-ed it out
 */
#ifndef AMOEBA

#ifndef OPEN_MAX
#ifdef SVR4
#define OPEN_MAX 128
#else
#include <sys/param.h>
#ifndef OPEN_MAX
#if defined(NOFILE) && !defined(NOFILES_MAX)
#define OPEN_MAX NOFILE
#else
#if defined(_POSIX_OPEN_MAX) && !defined(SCO)
#define OPEN_MAX _POSIX_OPEN_MAX
#else
#define OPEN_MAX NOFILES_MAX
#endif
#endif
#endif
#endif
#endif

#if OPEN_MAX <= 128
#define MAXSOCKS (OPEN_MAX - 1)
#else
#define MAXSOCKS 128
#endif

#ifndef NULL
#define NULL 0
#endif

#ifndef _MINIX

#define mskcnt ((MAXSOCKS + 31) / 32)     /* size of bit array */

#if (mskcnt==1)
#define BITMASK(i) (1 << (i))
#define MASKIDX(i) 0
#endif
#if (mskcnt>1)
#define BITMASK(i) (1 << ((i) & 31))
#define MASKIDX(i) ((i) >> 5)
#endif

#define MASKWORD(buf, i) buf[MASKIDX(i)]
#define BITSET(buf, i) MASKWORD(buf, i) |= BITMASK(i)
#define BITCLEAR(buf, i) MASKWORD(buf, i) &= ~BITMASK(i)
#define GETBIT(buf, i) (MASKWORD(buf, i) & BITMASK(i))

#if (mskcnt==1)
#define COPYBITS(src, dst) dst[0] = src[0]
#define CLEARBITS(buf) buf[0] = 0
#define MASKANDSETBITS(dst, b1, b2) dst[0] = (b1[0] & b2[0])
#define ORBITS(dst, b1, b2) dst[0] = (b1[0] | b2[0])
#define UNSETBITS(dst, b1) (dst[0] &= ~b1[0])
#define ANYSET(src) (src[0])
#endif
#if (mskcnt==2)
#define COPYBITS(src, dst) dst[0] = src[0]; dst[1] = src[1]
#define CLEARBITS(buf) buf[0] = 0; buf[1] = 0
#define MASKANDSETBITS(dst, b1, b2)  \
                  dst[0] = (b1[0] & b2[0]);\
                  dst[1] = (b1[1] & b2[1])
#define ORBITS(dst, b1, b2)  \
                  dst[0] = (b1[0] | b2[0]);\
                  dst[1] = (b1[1] | b2[1])
#define UNSETBITS(dst, b1) \
                      dst[0] &= ~b1[0]; \
                      dst[1] &= ~b1[1]
#define ANYSET(src) (src[0] || src[1])
#endif
#if (mskcnt==3)
#define COPYBITS(src, dst) dst[0] = src[0]; dst[1] = src[1]; dst[2] = src[2];
#define CLEARBITS(buf) buf[0] = 0; buf[1] = 0; buf[2] = 0
#define MASKANDSETBITS(dst, b1, b2)  \
                  dst[0] = (b1[0] & b2[0]);\
                  dst[1] = (b1[1] & b2[1]);\
                  dst[2] = (b1[2] & b2[2])
#define ORBITS(dst, b1, b2)  \
                  dst[0] = (b1[0] | b2[0]);\
                  dst[1] = (b1[1] | b2[1]);\
                  dst[2] = (b1[2] | b2[2])
#define UNSETBITS(dst, b1) \
                      dst[0] &= ~b1[0]; \
                      dst[1] &= ~b1[1]; \
                      dst[2] &= ~b1[2]
#define ANYSET(src) (src[0] || src[1] || src[2])
#endif
#if (mskcnt==4)
#define COPYBITS(src, dst) dst[0] = src[0]; dst[1] = src[1]; dst[2] = src[2];\
                  dst[3] = src[3]
#define CLEARBITS(buf) buf[0] = 0; buf[1] = 0; buf[2] = 0; buf[3] = 0
#define MASKANDSETBITS(dst, b1, b2)  \
                      dst[0] = (b1[0] & b2[0]);\
                      dst[1] = (b1[1] & b2[1]);\
                      dst[2] = (b1[2] & b2[2]);\
                      dst[3] = (b1[3] & b2[3])
#define ORBITS(dst, b1, b2)  \
                      dst[0] = (b1[0] | b2[0]);\
                      dst[1] = (b1[1] | b2[1]);\
                      dst[2] = (b1[2] | b2[2]);\
                      dst[3] = (b1[3] | b2[3])
#define UNSETBITS(dst, b1) \
                      dst[0] &= ~b1[0]; \
                      dst[1] &= ~b1[1]; \
                      dst[2] &= ~b1[2]; \
                      dst[3] &= ~b1[3]
#define ANYSET(src) (src[0] || src[1] || src[2] || src[3])
#endif

#if (mskcnt>4)
#define COPYBITS(src, dst) bcopy((caddr_t) src, (caddr_t) dst,\
                         mskcnt*sizeof(long))
#define CLEARBITS(buf) bzero((caddr_t) buf, mskcnt*sizeof(long))
#define MASKANDSETBITS(dst, b1, b2)  \
                  { int cri;              \
                  for (cri=mskcnt; --cri>=0; )  \
                      dst[cri] = (b1[cri] & b2[cri]); }
#define ORBITS(dst, b1, b2)  \
                  { int cri;              \
                  for (cri=mskcnt; --cri>=0; )  \
                      dst[cri] = (b1[cri] | b2[cri]); }
#define UNSETBITS(dst, b1) \
                  { int cri;              \
                  for (cri=mskcnt; --cri>=0; )  \
                      dst[cri] &= ~b1[cri];  }
#if (mskcnt==8)
#define ANYSET(src) (src[0] || src[1] || src[2] || src[3] || \
                 src[4] || src[5] || src[6] || src[7])
#endif
/*
 * If mskcnt>4 and not 8, then ANYSET is a routine defined in WaitFor.c.
 *
 * #define ANYSET(src) (src[0] || src[1] || src[2] || src[3] || src[4] ...)
 */
#endif

#endif /* !_MINIX */

typedef struct _connectionInput {
    struct _connectionInput *next;
    char *buffer;               /* contains current client input */
    char *bufptr;               /* pointer to current start of data */
    int  bufcnt;                /* count of bytes in buffer */
    int lenLastReq;
    int size;
} ConnectionInput, *ConnectionInputPtr;

typedef struct _connectionOutput {
    struct _connectionOutput *next;
    int size;
    unsigned char *buf;
    int count;
} ConnectionOutput, *ConnectionOutputPtr;

#endif /* AMOEBA */

#ifdef AMOEBA
typedef struct _amTcpIpComm {
    capability cap;           /* connection capability */
    struct circbuf *cb;       /* input buffer */
    signum signal;            /* signal to kill reader thread */
} AmTcpIpCommRec;
#endif

 typedef struct _osComm {
#ifndef AMOEBA
     int fd;
     ConnectionInputPtr input;
     ConnectionOutputPtr output;
#ifdef _MINIX
    ConnectionInputPtr inputFake;
    ConnectionOutputPtr outputNext;
#endif
#else
    int           family;           /* connection family */
    int           number;           /* connection number */
    char    status;           /* connection status */
    int           size;       /* input buffer size */
    char    *buffer;    /* input buffer */
    union {
      struct vc *vc;          /* virtual circuit */
      AmTcpIpCommRec tcp;     /* TCP/IP connection info */
    } conn;
#endif
     AuID   auth_id;          /* authorization id */
     long conn_time;          /* timestamp if not established, else 0  */
 } OsCommRec, *OsCommPtr;

#ifdef AMOEBA
#ifdef XDEBUG
extern Bool       amDebug;          /* amoeba debug toggle */
#endif /* XDEBUG */
extern char       *AuServerHostName;      /* audio server host name */
extern char       *AuTcpServerName; /* TCP/IP server name */
extern ClientPtr  grabClient;       /* for grabs */
extern ClientPtr  Clients[MAXTASKS];      /* All clients */
extern int        maxClient;        /* Highest client# */
extern int        nNewConns;        /* # of new clients */

extern semaphore  init_sema;        /* Initialize semaphore */
#endif /* AMOEBA */

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