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os.h

/* $XFree86: xc/programs/Xserver/include/os.h,v 3.39 2001/08/01 00:44:58 tsi Exp $ */
/***********************************************************

Copyright 1987, 1998  The Open Group

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.

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
OPEN GROUP 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 Open Group 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 Open Group.


Copyright 1987 by Digital Equipment Corporation, Maynard, 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 name of Digital 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.

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

/* $Xorg: os.h,v 1.4 2001/02/09 02:05:15 xorgcvs Exp $ */

#ifndef OS_H
#define OS_H
#include "misc.h"
#define ALLOCATE_LOCAL_FALLBACK(_size) Xalloc((unsigned long)(_size))
#define DEALLOCATE_LOCAL_FALLBACK(_ptr) Xfree((pointer)(_ptr))
#include "Xalloca.h"
#ifndef IN_MODULE
#include <stdarg.h>
#else
#include "xf86_ansic.h"
#endif

#define NullFID ((FID) 0)

#define SCREEN_SAVER_ON   0
#define SCREEN_SAVER_OFF  1
#define SCREEN_SAVER_FORCER 2
#define SCREEN_SAVER_CYCLE  3

#ifndef MAX_REQUEST_SIZE
#define MAX_REQUEST_SIZE 65535
#endif
#ifndef MAX_BIG_REQUEST_SIZE
#define MAX_BIG_REQUEST_SIZE 1048575
#endif

typedef pointer   FID;
typedef struct _FontPathRec *FontPathPtr;
typedef struct _NewClientRec *NewClientPtr;

#ifndef xalloc
#define xnfalloc(size) XNFalloc((unsigned long)(size))
#define xnfcalloc(_num, _size) XNFcalloc((unsigned long)(_num)*(unsigned long)(_size))
#define xnfrealloc(ptr, size) XNFrealloc((pointer)(ptr), (unsigned long)(size))

#define xalloc(size) Xalloc((unsigned long)(size))
#define xcalloc(_num, _size) Xcalloc((unsigned long)(_num)*(unsigned long)(_size))
#define xrealloc(ptr, size) Xrealloc((pointer)(ptr), (unsigned long)(size))
#define xfree(ptr) Xfree((pointer)(ptr))
#define xstrdup(s) Xstrdup(s)
#define xnfstrdup(s) XNFstrdup(s)
#endif

#ifndef IN_MODULE
#ifdef SCO
#include <stdio.h>
#endif
#include <string.h>
#endif

/* have to put $(SIGNAL_DEFINES) in DEFINES in Imakefile to get this right */
#ifdef SIGNALRETURNSINT
#define SIGVAL int
#else
#define SIGVAL void
#endif

extern Bool OsDelayInitColors;
extern void (*OsVendorVErrorFProc)(const char *, va_list args);

extern int WaitForSomething(
#if NeedFunctionPrototypes
    int* /*pClientsReady*/
#endif
);

#ifdef LBX
#define ReadRequestFromClient(client)   ((client)->readRequest(client))
extern int StandardReadRequestFromClient(
#if NeedFunctionPrototypes
    ClientPtr /*client*/
#endif
);

extern int ClientConnectionNumber(
#if NeedFunctionPrototypes
    ClientPtr /*client*/
#endif
);
#else
extern int ReadRequestFromClient(
#if NeedFunctionPrototypes
    ClientPtr /*client*/
#endif
);
#endif /* LBX */

extern Bool InsertFakeRequest(
#if NeedFunctionPrototypes
    ClientPtr /*client*/,
    char* /*data*/,
    int /*count*/
#endif
);

extern void ResetCurrentRequest(
#if NeedFunctionPrototypes
    ClientPtr /*client*/
#endif
);

extern void FlushAllOutput(
#if NeedFunctionPrototypes
    void
#endif
);

extern void FlushIfCriticalOutputPending(
#if NeedFunctionPrototypes
    void
#endif
);

extern void SetCriticalOutputPending(
#if NeedFunctionPrototypes
    void
#endif
);

extern int WriteToClient(
#if NeedFunctionPrototypes
    ClientPtr /*who*/,
    int /*count*/,
    char* /*buf*/
#endif
);

extern void ResetOsBuffers(
#if NeedFunctionPrototypes
    void
#endif
);

extern void InitConnectionLimits(
#if NeedFunctionPrototypes
    void
#endif
);

extern void CreateWellKnownSockets(
#if NeedFunctionPrototypes
    void
#endif
);

extern void ResetWellKnownSockets(
#if NeedFunctionPrototypes
    void
#endif
);

extern void CloseWellKnownConnections(
#if NeedFunctionPrototypes
    void
#endif
);

extern XID
AuthorizationIDOfClient(
#if NeedFunctionPrototypes
    ClientPtr /*client*/
#endif
);

extern char *ClientAuthorized(
#if NeedFunctionPrototypes
    ClientPtr /*client*/,
    unsigned int /*proto_n*/,
    char* /*auth_proto*/,
    unsigned int /*string_n*/,
    char* /*auth_string*/
#endif
);

extern Bool EstablishNewConnections(
#if NeedFunctionPrototypes
    ClientPtr /*clientUnused*/,
    pointer /*closure*/
#endif
);

extern void CheckConnections(
#if NeedFunctionPrototypes
    void
#endif
);

extern void CloseDownConnection(
#if NeedFunctionPrototypes
    ClientPtr /*client*/
#endif
);

extern void AddEnabledDevice(
#if NeedFunctionPrototypes
    int /*fd*/
#endif
);

extern void RemoveEnabledDevice(
#if NeedFunctionPrototypes
    int /*fd*/
#endif
);

extern void OnlyListenToOneClient(
#if NeedFunctionPrototypes
    ClientPtr /*client*/
#endif
);

extern void ListenToAllClients(
#if NeedFunctionPrototypes
    void
#endif
);

extern void IgnoreClient(
#if NeedFunctionPrototypes
    ClientPtr /*client*/
#endif
);

extern void AttendClient(
#if NeedFunctionPrototypes
    ClientPtr /*client*/
#endif
);

extern void MakeClientGrabImpervious(
#if NeedFunctionPrototypes
    ClientPtr /*client*/
#endif
);

extern void MakeClientGrabPervious(
#if NeedFunctionPrototypes
    ClientPtr /*client*/
#endif
);

#ifdef LBX
extern void CloseDownFileDescriptor(
#if NeedFunctionPrototypes
    ClientPtr /* client */
#endif
);
#endif

extern void AvailableClientInput(
#if NeedFunctionPrototypes
    ClientPtr /* client */
#endif
);

extern void Error(
#if NeedFunctionPrototypes
    char* /*str*/
#endif
);

extern CARD32 GetTimeInMillis(
#if NeedFunctionPrototypes
    void
#endif
);

extern void AdjustWaitForDelay(
#if NeedFunctionPrototypes
    pointer /*waitTime*/,
    unsigned long /*newdelay*/
#endif
);

typedef     struct _OsTimerRec *OsTimerPtr;

typedef CARD32 (*OsTimerCallback)(
#if NeedFunctionPrototypes
    OsTimerPtr /* timer */,
    CARD32 /* time */,
    pointer /* arg */
#endif
);

extern void TimerInit(
#if NeedFunctionPrototypes
    void
#endif
);

extern Bool TimerForce(
#if NeedFunctionPrototypes
    OsTimerPtr /* timer */
#endif
);

#define TimerAbsolute (1<<0)
#define TimerForceOld (1<<1)

extern OsTimerPtr TimerSet(
#if NeedFunctionPrototypes
    OsTimerPtr /* timer */,
    int /* flags */,
    CARD32 /* millis */,
    OsTimerCallback /* func */,
    pointer /* arg */
#endif
);

extern void TimerCheck(
#if NeedFunctionPrototypes
    void
#endif
);

extern void TimerCancel(
#if NeedFunctionPrototypes
    OsTimerPtr /* pTimer */
#endif
);

extern void TimerFree(
#if NeedFunctionPrototypes
    OsTimerPtr /* pTimer */
#endif
);

extern SIGVAL AutoResetServer(
#if NeedFunctionPrototypes
    int /*sig*/
#endif
);

extern SIGVAL GiveUp(
#if NeedFunctionPrototypes
    int /*sig*/
#endif
);

extern void UseMsg(
#if NeedFunctionPrototypes
    void
#endif
);

extern void ProcessCommandLine(
#if NeedFunctionPrototypes
    int /*argc*/,
    char* /*argv*/[]
#endif
);

extern pointer Xalloc(
#if NeedFunctionPrototypes
    unsigned long /*amount*/
#endif
);

extern pointer XNFalloc(
#if NeedFunctionPrototypes
    unsigned long /*amount*/
#endif
);

extern pointer Xcalloc(
#if NeedFunctionPrototypes
    unsigned long /*amount*/
#endif
);

extern pointer XNFcalloc(
#if NeedFunctionPrototypes
    unsigned long /*amount*/
#endif
);

extern pointer Xrealloc(
#if NeedFunctionPrototypes
    pointer /*ptr*/,
    unsigned long /*amount*/
#endif
);

extern pointer XNFrealloc(
#if NeedFunctionPrototypes
    pointer /*ptr*/,
    unsigned long /*amount*/
#endif
);

extern void Xfree(
#if NeedFunctionPrototypes
    pointer /*ptr*/
#endif
);

extern void OsInitAllocator(
#if NeedFunctionPrototypes
    void
#endif
);

extern char *Xstrdup(const char *s);
extern char *XNFstrdup(const char *s);

typedef SIGVAL (*OsSigHandlerPtr)(
#if NeedFunctionPrototypes
    int /* sig */
#endif
);

extern OsSigHandlerPtr OsSignal(
#if NeedFunctionPrototypes
    int /* sig */,
    OsSigHandlerPtr /* handler */
#endif
);

extern int auditTrailLevel;

extern void AuditPrefix(
#if NeedFunctionPrototypes
    const char *
#endif
);

extern void AuditF(
#if NeedVarargsPrototypes
    const char* /*f*/,
    ...
#endif
);

extern void FatalError(
#if NeedVarargsPrototypes
    const char* /*f*/,
    ...
#endif
)
#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ > 4)
__attribute((noreturn))
#endif
;

extern void ErrorF(
#if NeedVarargsPrototypes
    const char* /*f*/,
    ...
#endif
);

#if NeedVarargsPrototypes
extern void VErrorF(const char *f, va_list args);
#endif

#ifdef SERVER_LOCK
extern void LockServer(
#if NeedFunctionPrototypes
    void
#endif
);

extern void UnlockServer(
#if NeedFunctionPrototypes
    void
#endif
);
#endif

extern int OsLookupColor(
#if NeedFunctionPrototypes
    int     /*screen*/,
    char * /*name*/,
    unsigned /*len*/,
    unsigned short * /*pred*/,
    unsigned short * /*pgreen*/,
    unsigned short * /*pblue*/
#endif
);

extern void OsInit(
#if NeedFunctionPrototypes
    void
#endif
);

extern void OsCleanup(
#if NeedFunctionPrototypes
    void
#endif
);

extern void OsVendorFatalError(
#if NeedFunctionPrototypes
    void
#endif
);

extern void OsVendorInit(
#if NeedFunctionPrototypes
    void
#endif
);

extern int OsInitColors(
#if NeedFunctionPrototypes
    void
#endif
);

void OsBlockSignals (
#if NeedFunctionPrototypes
                 void
#endif                 
                 );

void OsReleaseSignals (
#if NeedFunctionPrototypes
                 void
#endif                 
                 );

#if !defined(WIN32) && !defined(__EMX__)
extern int System(char *);
extern pointer Popen(char *, char *);
extern int Pclose(pointer);
#else
#define System(a) system(a)
#define Popen(a,b) popen(a,b)
#define Pclose(a) pclose(a)
#endif

extern void CheckUserParameters(int argc, char **argv, char **envp);
extern void CheckUserAuthorization(void);

extern int AddHost(
#if NeedFunctionPrototypes
    ClientPtr     /*client*/,
    int         /*family*/,
    unsigned    /*length*/,
    pointer     /*pAddr*/
#endif
);

extern Bool ForEachHostInFamily (
#if NeedFunctionPrototypes
    int         /*family*/,
    Bool    (* /*func*/ )(
#if NeedNestedPrototypes
            unsigned char * /* addr */,
            short           /* len */,
            pointer         /* closure */
#endif
            ),
    pointer /*closure*/
#endif
);

extern int RemoveHost(
#if NeedFunctionPrototypes
    ClientPtr     /*client*/,
    int         /*family*/,
    unsigned    /*length*/,
    pointer     /*pAddr*/
#endif
);

extern int GetHosts(
#if NeedFunctionPrototypes
    pointer * /*data*/,
    int         * /*pnHosts*/,
    int         * /*pLen*/,
    BOOL    * /*pEnabled*/
#endif
);

typedef struct sockaddr * sockaddrPtr;

extern int InvalidHost(
#if NeedFunctionPrototypes
    sockaddrPtr /*saddr*/,
    int           /*len*/
#endif
);

extern int LocalClient(
#if NeedFunctionPrototypes
    ClientPtr /* client */
#endif
);

extern int ChangeAccessControl(
#if NeedFunctionPrototypes
    ClientPtr /*client*/,
    int /*fEnabled*/
#endif
);

extern int GetAccessControl(
#if NeedFunctionPrototypes
    void
#endif
);


extern void AddLocalHosts(
#if NeedFunctionPrototypes
    void
#endif
);

extern void ResetHosts(
#if NeedFunctionPrototypes
    char *display
#endif
);

extern void EnableLocalHost(
#if NeedFunctionPrototypes
    void
#endif
);

extern void DisableLocalHost(
#if NeedFunctionPrototypes
    void
#endif
);

extern void AccessUsingXdmcp(
#if NeedFunctionPrototypes
    void
#endif
);

extern void DefineSelf(
#if NeedFunctionPrototypes
    int /*fd*/
#endif
);

extern void AugmentSelf(
#if NeedFunctionPrototypes
    pointer /*from*/,
    int /*len*/
#endif
);

extern void InitAuthorization(
#if NeedFunctionPrototypes
    char * /*filename*/
#endif
);

extern int LoadAuthorization(
#if NeedFunctionPrototypes
    void
#endif
);

extern void RegisterAuthorizations(
#if NeedFunctionPrototypes
    void
#endif
);

extern XID AuthorizationToID (
      unsigned short    name_length,
      char        *name,
      unsigned short    data_length,
      char        *data);

extern int AuthorizationFromID (
      XID         id,
      unsigned short    *name_lenp,
      char        **namep,
      unsigned short    *data_lenp,
      char        **datap);

extern XID CheckAuthorization(
#if NeedFunctionPrototypes
    unsigned int /*namelength*/,
    char * /*name*/,
    unsigned int /*datalength*/,
    char * /*data*/,
    ClientPtr /*client*/,
    char ** /*reason*/
#endif
);

extern void ResetAuthorization(
#if NeedFunctionPrototypes
    void
#endif
);

extern int RemoveAuthorization (
    unsigned short      name_length,
    char          *name,
    unsigned short      data_length,
    char          *data);

extern int AddAuthorization(
#if NeedFunctionPrototypes
    unsigned int  /*name_length*/,
    char *        /*name*/,
    unsigned int  /*data_length*/,
    char *        /*data*/
#endif
);

extern XID GenerateAuthorization(
#if NeedFunctionPrototypes
    unsigned int   /* name_length */,
    char    *  /* name */,
    unsigned int   /* data_length */,
    char    *  /* data */,
    unsigned int * /* data_length_return */,
    char    ** /* data_return */
#endif
);

#ifdef COMMANDLINE_CHALLENGED_OPERATING_SYSTEMS
extern void ExpandCommandLine(
#if NeedFunctionPrototypes
    int * /*pargc*/,
    char *** /*pargv*/
#endif
);
#endif

extern int ddxProcessArgument(
#if NeedFunctionPrototypes
    int /*argc*/,
    char * /*argv*/ [],
    int /*i*/
#endif
);

extern void ddxUseMsg(void);

/*
 *  idiom processing stuff
 */

xReqPtr PeekNextRequest(
#if NeedFunctionPrototypes
    xReqPtr req, ClientPtr client, Bool readmore
#endif
);

void SkipRequests(
#if NeedFunctionPrototypes
    xReqPtr req, ClientPtr client, int numskipped
#endif
);

/* int ReqLen(xReq *req, ClientPtr client)
 * Given a pointer to a *complete* request, return its length in bytes.
 * Note that if the request is a big request (as defined in the Big
 * Requests extension), the macro lies by returning 4 less than the
 * length that it actually occupies in the request buffer.  This is so you
 * can blindly compare the length with the various sz_<request> constants
 * in Xproto.h without having to know/care about big requests.
 */
#define ReqLen(_pxReq, _client) \
 ((_pxReq->length ? \
     (_client->swapped ? lswaps(_pxReq->length) : _pxReq->length) \
  : ((_client->swapped ? \
      lswapl(((CARD32*)_pxReq)[1]) : ((CARD32*)_pxReq)[1])-1) \
  ) << 2)

/* otherReqTypePtr CastxReq(xReq *req, otherReqTypePtr)
 * Cast the given request to one of type otherReqTypePtr to access
 * fields beyond the length field.
 */
#define CastxReq(_pxReq, otherReqTypePtr) \
    (_pxReq->length ? (otherReqTypePtr)_pxReq \
                : (otherReqTypePtr)(((CARD32*)_pxReq)+1))

/* stuff for SkippedRequestsCallback */
extern CallbackListPtr SkippedRequestsCallback;
typedef struct {
    xReqPtr req;
    ClientPtr client;
    int numskipped;
} SkippedRequestInfoRec;

/* stuff for ReplyCallback */
extern CallbackListPtr ReplyCallback;
typedef struct {
    ClientPtr client;
    pointer replyData;
    unsigned long dataLenBytes;
    unsigned long bytesRemaining;
    Bool startOfReply;
} ReplyInfoRec;

/* stuff for FlushCallback */
extern CallbackListPtr FlushCallback;

extern void AbortDDX(void);
extern void ddxGiveUp(void);
extern int TimeSinceLastInputEvent(void);

#endif /* OS_H */

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