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#ifndef CYGONCE_INFRA_CYG_TRAC_H

#define CYGONCE_INFRA_CYG_TRAC_H

//==========================================================================

//

//      cyg_trac.h

//

//      Macros and prototypes for the tracing system

//

//==========================================================================

// ####ECOSHOSTGPLCOPYRIGHTBEGIN####                                        

// -------------------------------------------                              

// This file is part of the eCos host tools.                                

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.

//

// This program is free software; you can redistribute it and/or modify     

// it under the terms of the GNU General Public License as published by     

// the Free Software Foundation; either version 2 or (at your option) any   

// later version.                                                           

//

// This program is distributed in the hope that it will be useful, but      

// WITHOUT ANY WARRANTY; without even the implied warranty of               

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU        

// General Public License for more details.                                 

//

// You should have received a copy of the GNU General Public License        

// along with this program; if not, write to the                            

// Free Software Foundation, Inc., 51 Franklin Street,                      

// Fifth Floor, Boston, MA  02110-1301, USA.                                

// -------------------------------------------                              

// ####ECOSHOSTGPLCOPYRIGHTEND####                                          

//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):   nickg from an original by hmt

// Contributors:        nickg

// Date:        1998-04-23

// Purpose:     Use traces to log procedure entry, and "print" stuff

// Description: Runtime logging messages that compile to nothing in

//              release versions of the code, to allow

//              as-you-go tracing of alternate builds.

// Usage:       #include <cyg/infra/cyg_trac.h>

//              ...

//              CYG_TRACE2( PIPE_TRACE, "pipe %x, data %d", ppipe, oword );

//

//      which can result, for example, in a message of the form:

//      "TRACE: pipemgr.cxx:1340, write_pipe(): pipe 0x8004c, data 17"

//

//####DESCRIPTIONEND####

//

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

Explicit tracing

================

CYG_TRACE0( bool, msg );

CYG_TRACE1( bool, msg, arg1 );

CYG_TRACE2( bool, msg, arg1, arg2 );

....

CYG_TRACE8( bool, msg, .... [with 8 args] );

In general, the bool controls whether or not the tracing occurs for a

particular invocation of the macro.  The msg is a printf-style string,

though exactly which formats are supported depends on the underlying

implementation.  Typically, at least %d, %x, %08x, %c and %s will be

supported.  Of course a most compact implementation might print

  TRACE:z1dbuff.c[92]get_nextdata(): data pointer %x offset %d: 42BD8 1C

or some such, leaving you to work it out for yourself.

It is expected that the boolean would rarely actually be a complex

expression; it is more likely that it would either be "1", tracing being

controlled for the whole compilation unit or subsystem by means of the

CYGDBG_USE_TRACING symbol, or a local symbol for tracing over the whole

file, defined to 0 or to 1.  For runtime control of tracing in a debugging

session, it is typical to use symbols defined to expressions such as:

    static int xxx_trace = 0;

    #define TL1 (0 < xxx_trace)

    #define TL2 (1 < xxx_trace)

so you set xxx_trace to 1 to enable those messages conditioned by TL1

(trace level 1) and so on.

    CYG_TRACE1( TL1, "Major argument is %d", zz );

    CYG_TRACE4( TL2, "...minor details %d %d %d %d", m1, m2, m3 ,m4 );

To assist with the case where the same symbol or expression is used

throughout a compilation unit, the programmer can define the symbol

CYG_TRACE_USER_BOOL as they choose and then use convenience macros with the

suffix 'B' in the obvious manner:

    #define CYG_TRACE_USER_BOOL (xxx_trace > 0)

    CYG_TRACE2B( "Counters are %d, %d", countlo, counthi );

For the case where you just want to print a load of numbers in hex, or

decimal, convenience suffices X, D and Y are provided.  X uses %08x, D %d

and Y an unadorned %x for each argument.

    CYG_TRACE3D( TL2, m1, m2, d );

If you want to do something similar but with a little more comment, the

names (strictly spellings) of the variables you are printing can be used by

appending a V to the X, D or Y.

    CYG_TRACE3DV( TL2, m1, m2, d );

might output:

  TRACE:z1dbuff.c[92]get_nextdata(): m1=23 m2=-4 d=55

These conveniences can be combined, and they apply equally to tracing with

up to 8 variables; the B for Bool goes last:

     CYG_TRACE4DVB( i, i*i, i*i*i, i*i*i*i );

might output:

  TRACE:table.c[12]main(): i=3 i*i=9 i*i*i=27 i*i*i*i=81

Function Tracing

================

There are also facities for easily reporting function entry and exit,

printing the function arguments, and detecting returns without logging (or

without a value!).

The basic facility is

        CYG_REPORT_FUNCTION();

In C, place this between the local variable declarations and the first

statement or errors will ensue.  C++ is more flexible; place the macro as

the first line of all functions you wish to trace.  The following

variations are also provided:

  CYG_REPORT_FUNCTYPE( exitmsg )  provide a printf string for the type

                                  of the returned value

  CYG_REPORT_FUNCNAME( name )     supply a function name explicitly, for

                                  if __FUNCTION__ is not supported

  CYG_REPORT_FUNCNAMETYPE( name, exitmsg ) both of the above extensions

These are unconditional; the assumption is that if function reporting is

used at all it will be used for all functions within a compilation unit.

However, it is useful to be able to control function reporting at finer

grain without editing the source files concerned, at compile time or at

runtime.  To support this, conditioned versions (with suffix 'C') are

provided for the above four macros, which only procduce trace output if the

macro CYG_REPORT_USER_BOOL evaluates true.

  CYG_REPORT_FUNCTIONC()

  CYG_REPORT_FUNCNAMEC( name )

  CYG_REPORT_FUNCTYPEC( exitmsg )

  CYG_REPORT_FUNCNAMETYPEC( name, exitmsg )

You can define CYG_REPORT_USER_BOOL to anything you like before invoking

these macros; using a simple -DCYG_REPORT_USER_BOOL=0 or ...=1 on the

compiler command line would do the trick, but there is more flexibility to

be gained by something like:

  #define CYG_REPORT_USER_BOOL (reporting_bool_FOO)

  #ifdef TRACE_FOO

  int reporting_bool_FOO = 1;

  #else

  int reporting_bool_FOO = 0;

  #endif

where FOO relates to the module name.  Thus an external symbol sets the

default, but it can be overridden in a debugging session by setting the

variable reporting_bool_FOO.

Note that the condition applied to the initial CYG_REPORT_FUNC...() macro

controls all function-related reporting (not tracing) from that function;

the underlying mechanisms still operate even if no output is created.  Thus

no conditioned variants of CYG_REPORT_FUNCARG[s] nor of CYG_REPORT_RETURN

are needed.

Examples:

    int myfunction()

    {

        CYG_REPORT_FUNCTYPE( "recode is %d" );

A function return is traced using

    CYG_REPORT_RETURN()         a void return

    CYG_REPORT_RETVAL( value )  returning a value

With the CYG_REPORT_FUNCTYPE example, the latter might produce a message

like:

  TRACE:myprog.c[40]fact(): enter

  TRACE:myprog.c[53]fact(): retcode is 24

It is also useful to trace the values of the arguments to a function:

        CYG_REPORT_FUNCARGVOID          confirms that the function is void

        CYG_REPORT_FUNCARG1( format, arg )              printf-style

                to

        CYG_REPORT_FUNCARG8( format, arg1...arg8 )      printf-style

The CYG_REPORT_FUNCARG[1-8] macros are also offered with the convenience

extensions: D, X, or Y, and V like the explicit tracing macros.  For

example:

    int fact( int number )

    {

        CYG_REPORT_FUNCTYPE( "recode is %d" );

        CYG_REPORT_FUNCARG1DV( number );

        int result = number;

        while ( --number > 1 )  result *= number

        CYG_REPORT_RETVAL( result );

        return result;

    }

might produce:

  TRACE:myprog.c[40]fact(): enter

  TRACE:myprog.c[40]fact(): number=4

  TRACE:myprog.c[53]fact(): retcode is 24

If no exit message is provided, a default of %08x is used.

General Configury

=================

If CYGDBG_INFRA_DEBUG_FUNCTION_PSEUDOMACRO is *not* defined, it is assumed

that __PRETTY_FUNCTION__ or equivalents do not exist, so no function name

tracing is possible; only file and line number.

If CYGDBG_INFRA_DEBUG_TRACE_MESSAGE is *not* defined, the message and

arguments to all tracing macros are not used; only "execution was here"

type information, by file, function and line number, is available.  This

can greatly reduce the size of an image with tracing disabled, which may be

crucial in debugging on actual shipped hardware with limited memory.

If configured for buffered tracing then CYG_TRACE_PRINT() can be used to

output the contents of the trace buffer on demand.

CYG_TRACE_DUMP() outputs a form of "core dump" containing info on the

scheduler and threads at the time. This information will be invalid if

the kernel is not running.

C/C++: in C++ the function reporting is implemented using a class object

with a destructor; this allows reporting of a return which has not been

explicitly reported, and detection of accidental multiple return reports.

This helps you write the function reporting correctly.  In C it is not

possible to be so sophisticated, so the implementation is not so helpful in

detecting errors in the use of the tracing system.

Note that for all of the above variations, the internal API to the

functions which are called in consequence of tracing remains the same, so

these variations can be mixed in the same executable, by configuring the

tracing macros differently in different compilation units or subsystems.

Summary

=======

Explicit tracing

----------------

CYG_TRACE0( bool, msg )                         if bool, print msg

CYG_TRACE1( bool, msg, arg )                    if bool, printf-style

        to

CYG_TRACE8( bool, msg, arg1...arg8 )            if bool, printf-style

CYG_TRACE0B( msg, args... ) to CYG_TRACE8B()    use CYG_TRACE_USER_BOOL

CYG_TRACE1X( bool, args... ) to CYG_TRACE8X()   print args using %08x

CYG_TRACE1Y( bool, args... ) to CYG_TRACE8Y()   print args using %x

CYG_TRACE1D( bool, args... ) to CYG_TRACE8D()   print args using %d

CYG_TRACE1XV( bool, args... ) to CYG_TRACE8XV() print args using "arg=%08x"

CYG_TRACE1YV( bool, args... ) to CYG_TRACE8YV() print args using "arg=%x"

CYG_TRACE1DV( bool, args... ) to CYG_TRACE8DV() print args using "arg=%d"

CYG_TRACE1XB( args... ) to CYG_TRACE8XB()       print using %08x, no bool

CYG_TRACE1YB( args... ) to CYG_TRACE8YB()       print using %x, no bool

CYG_TRACE1DB( args... ) to CYG_TRACE8DB()       print using %d, no bool

CYG_TRACE1XVB( args... ) to CYG_TRACE8XVB()     use "arg=%08x", no bool

CYG_TRACE1YVB( args... ) to CYG_TRACE8YVB()     use "arg=%x", no bool

CYG_TRACE1DVB( args... ) to CYG_TRACE8DVB()     use "arg=%d", no bool

Function tracing

----------------

CYG_REPORT_FUNCTION()                           default function entry

CYG_REPORT_FUNCNAME( name )                     name the function

CYG_REPORT_FUNCTYPE( exitmsg )                  printf for retval

CYG_REPORT_FUNCNAMETYPE( name, exitmsg )        both

CYG_REPORT_FUNCTIONC()                          as above, but conditional

CYG_REPORT_FUNCNAMEC( name )                    on CYG_REPORT_USER_BOOL

CYG_REPORT_FUNCTYPEC( exitmsg )                 however it is defined

CYG_REPORT_FUNCNAMETYPEC( name, exitmsg )       ...

CYG_REPORT_RETURN()                             void function exit

CYG_REPORT_RETVAL( value )                      returning value

CYG_REPORT_FUNCARGVOID()                        void function entry

CYG_REPORT_FUNCARG1( format, arg )              printf-style

        to

CYG_REPORT_FUNCARG8( format, arg1...arg8 )      printf-style

CYG_REPORT_FUNCARG1X( arg )

        to

CYG_REPORT_FUNCARG8X( arg1...arg8 )             use %08x

CYG_REPORT_FUNCARG1Y...                         use %x

CYG_REPORT_FUNCARG1D...                         use %d

CYG_REPORT_FUNCARG1XV...                        use "arg=%08x"

CYG_REPORT_FUNCARG1YV...                        use "arg=%x"

CYG_REPORT_FUNCARG1DV...                        use "arg=%d"

Other

-----

CYG_TRACE_DUMP()                                dumps kernel state

CYG_TRACE_PRINT()                               prints buffered tracing

---------------------------------------------------------------------------

Internal Documentation

======================

The required functions which are used by the tracing macros are

    externC void

    cyg_tracenomsg( const char *psz_func, const char *psz_file, cyg_uint32 linenum );

    externC void

    cyg_tracemsg( cyg_uint32 what,

                  const char *psz_func, const char *psz_file, cyg_uint32 linenum,

                  const char *psz_msg );

    externC void

    cyg_tracemsg2( cyg_uint32 what,

                   const char *psz_func, const char *psz_file, cyg_uint32 linenum,

                   const char *psz_msg,

                   CYG_ADDRWORD arg0,  CYG_ADDRWORD arg1 );

    // extended in the obvious way for 4,6,8 arguments

These functions should expect psz_func and psz_file to possibly be NULL in

case those facilities are not available in the compilation environment, and

do something safe in such cases.  A NULL message should really be dealt

with safely also, just logging "execution here" info like cyg_tracenomsg().

Discussion of possible underlying implementations

-------------------------------------------------

It is intended that the functions that get called can simply print the info

they are given in as fancy a format as you like, or they could do the

printf-type formatting and log the resulting text in a buffer.  They get

told the type of event (function-entry, function-arguments, function-exit

or plain tracing info) and so can perform fancy indenting, for example, to

make call stack inspection more obvious to humans.  It is also intended

that a more compact logging arrangement be possible, for example one which

records, in 32-bit words (CYG_ADDRWORDs), the addresses of the file,

function and msg strings, the line number and the arguments.  This has the

implication that the msg string should not be constructed dynamically but

be static ie. a plain quoted C string.  The number of arguments also must

be recorded, and if it is chosen to save string arguments in the buffer

rather than just their addresses (which could be invalid by the time the

logged information is processed) some flagging of which arguments are

strings must be provided.  The system could also be extended to deal with

floats of whichever size fir in a CYG_ADDRWORD; these would probably

require special treatment also.  With these considerations in mind, the

maximum number of parameters in a single trace message has been set to 8,

so that a byte bitset could be used to indicate which arguments are

strings, another for those which are floats, and the count of arguments

also fits in a byte as number or a bitset.

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

#include <pkgconf/infra.h>

#include <cyg/infra/cyg_ass.h>

// -------------------------------------------------------------------------

// CYGDBG_INFRA_DEBUG_FUNCTION_PSEUDOMACRO is dealt with in cyg_ass.h.

// -------------------------------------------------------------------------

#ifdef CYGDBG_USE_TRACING

// -------------------------------------------------------------------------

// We define macros and appropriate prototypes for the trace/fail

// system.  These are:

//      CYG_TRACE0..8     - trace if boolean

//      CYG_TRACEPROC     - default no comment proc entry

//      CYG_TRACEPROCOUT  - default no comment proc exit

//      CYG_TRACE_DUMP    - outputs a form of "core dump", including the state

//                          of the kernel scheduler, threads, etc.

//      CYG_TRACE_PRINT   - Forces manual output of any trace info that has

//                          been buffered up.

// these are executed to deal with tracing - breakpoint?

externC void

cyg_tracenomsg( const char *psz_func, const char *psz_file, cyg_uint32 linenum );

externC void

cyg_trace_dump(void);

#define CYG_TRACE_DUMP() cyg_trace_dump()

#ifdef CYGDBG_INFRA_DEBUG_TRACE_ASSERT_BUFFER

externC void

cyg_trace_print(void);

#define CYG_TRACE_PRINT() cyg_trace_print()

#else

#define CYG_TRACE_PRINT() CYG_EMPTY_STATEMENT

#endif

// provide every other one of these as a space/caller bloat compromise.

# ifdef CYGDBG_INFRA_DEBUG_TRACE_MESSAGE

enum cyg_trace_what{

    cyg_trace_trace = 0,

    cyg_trace_enter,

    cyg_trace_args,

    cyg_trace_return,

//    cyg_trace_,

//    cyg_trace_,

};

externC void

cyg_tracemsg( cyg_uint32 what,

              const char *psz_func, const char *psz_file, cyg_uint32 linenum,

              const char *psz_msg );

externC void

cyg_tracemsg2( cyg_uint32 what,

               const char *psz_func, const char *psz_file, cyg_uint32 linenum,

               const char *psz_msg,

               CYG_ADDRWORD arg0,  CYG_ADDRWORD arg1 );

externC void

cyg_tracemsg4( cyg_uint32 what,

               const char *psz_func, const char *psz_file, cyg_uint32 linenum,

               const char *psz_msg,

               CYG_ADDRWORD arg0,  CYG_ADDRWORD arg1,

               CYG_ADDRWORD arg2,  CYG_ADDRWORD arg3 );

externC void

cyg_tracemsg6( cyg_uint32 what,

               const char *psz_func, const char *psz_file, cyg_uint32 linenum,

               const char *psz_msg,

               CYG_ADDRWORD arg0,  CYG_ADDRWORD arg1,

               CYG_ADDRWORD arg2,  CYG_ADDRWORD arg3,

               CYG_ADDRWORD arg4,  CYG_ADDRWORD arg5 );

externC void

cyg_tracemsg8( cyg_uint32 what,

               const char *psz_func, const char *psz_file, cyg_uint32 linenum,

               const char *psz_msg,

               CYG_ADDRWORD arg0,  CYG_ADDRWORD arg1,

               CYG_ADDRWORD arg2,  CYG_ADDRWORD arg3,

               CYG_ADDRWORD arg4,  CYG_ADDRWORD arg5,

               CYG_ADDRWORD arg6,  CYG_ADDRWORD arg7 );

#endif // CYGDBG_INFRA_DEBUG_TRACE_MESSAGE

// -------------------------------------------------------------------------

# ifdef CYGDBG_INFRA_DEBUG_TRACE_MESSAGE

#  define CYG_TRACE_docall0( _msg_ )                                    \

    cyg_tracemsg( cyg_trace_trace,                                      \

                  __PRETTY_FUNCTION__, __FILE__, __LINE__, _msg_ );

#  define CYG_TRACE_docall2( _msg_, _arg0_, _arg1_ )                    \

    cyg_tracemsg2( cyg_trace_trace,                                     \

                   __PRETTY_FUNCTION__, __FILE__, __LINE__, _msg_,      \

                 (CYG_ADDRWORD)_arg0_, (CYG_ADDRWORD)_arg1_ );

#  define CYG_TRACE_docall4( _msg_, _arg0_, _arg1_ , _arg2_, _arg3_  )  \

    cyg_tracemsg4( cyg_trace_trace,                                     \

                   __PRETTY_FUNCTION__, __FILE__, __LINE__, _msg_,      \

                 (CYG_ADDRWORD)_arg0_, (CYG_ADDRWORD)_arg1_,            \

                 (CYG_ADDRWORD)_arg2_, (CYG_ADDRWORD)_arg3_ );

#  define CYG_TRACE_docall6( _msg_, _arg0_, _arg1_ , _arg2_, _arg3_,    \

                                    _arg4_, _arg5_                   )  \

    cyg_tracemsg6( cyg_trace_trace,                                     \

                   __PRETTY_FUNCTION__, __FILE__, __LINE__, _msg_,      \

                 (CYG_ADDRWORD)_arg0_, (CYG_ADDRWORD)_arg1_,            \

                 (CYG_ADDRWORD)_arg2_, (CYG_ADDRWORD)_arg3_,            \

                 (CYG_ADDRWORD)_arg4_, (CYG_ADDRWORD)_arg5_ );

#  define CYG_TRACE_docall8( _msg_, _arg0_, _arg1_ , _arg2_, _arg3_,    \

                                    _arg4_,  _arg5_, _arg6_, _arg7_ )   \

    cyg_tracemsg8( cyg_trace_trace,                                     \

                   __PRETTY_FUNCTION__, __FILE__, __LINE__, _msg_,      \

                 (CYG_ADDRWORD)_arg0_, (CYG_ADDRWORD)_arg1_,            \

                 (CYG_ADDRWORD)_arg2_, (CYG_ADDRWORD)_arg3_,            \

                 (CYG_ADDRWORD)_arg4_, (CYG_ADDRWORD)_arg5_,            \

                 (CYG_ADDRWORD)_arg6_, (CYG_ADDRWORD)_arg7_ );

# else // do not CYGDBG_INFRA_DEBUG_TRACE_MESSAGE

#  define CYG_TRACE_docall0( _msg_ )                                    \

    cyg_tracenomsg( __PRETTY_FUNCTION__, __FILE__, __LINE__ );

#  define CYG_TRACE_docall2( _msg_, _arg0_, _arg1_ )                    \

    cyg_tracenomsg( __PRETTY_FUNCTION__, __FILE__, __LINE__ );

#  define CYG_TRACE_docall4( _msg_, _arg0_, _arg1_ , _arg2_, _arg3_  )  \

    cyg_tracenomsg( __PRETTY_FUNCTION__, __FILE__, __LINE__ );

#  define CYG_TRACE_docall6( _msg_, _arg0_, _arg1_ , _arg2_, _arg3_,    \

                                    _arg4_, _arg5_                   )  \

    cyg_tracenomsg( __PRETTY_FUNCTION__, __FILE__, __LINE__ );

#  define CYG_TRACE_docall8( _msg_, _arg0_, _arg1_, _arg2_, _arg3_,     \

                                    _arg4_, _arg5_, _arg6_, _arg7_   )  \

    cyg_tracenomsg( __PRETTY_FUNCTION__, __FILE__, __LINE__ );

#endif

// -------------------------------------------------------------------------

// Conditioned trace; if the condition is false, fail.

#define CYG_TRACE0( _bool_, _msg_ )                             \

    CYG_MACRO_START                                             \

    if ( ( _bool_ ) )                                           \

        CYG_TRACE_docall0( _msg_ );                             \

    CYG_MACRO_END

#define CYG_TRACE1( _bool_, _msg_, a )                          \

    CYG_MACRO_START                                             \

    if ( ( _bool_ ) )                                           \

        CYG_TRACE_docall2( _msg_, a, 0 );                       \

    CYG_MACRO_END

#define CYG_TRACE2( _bool_, _msg_, a, b )                       \

    CYG_MACRO_START                                             \

    if ( ( _bool_ ) )                                           \

        CYG_TRACE_docall2( _msg_, a, b );                       \

    CYG_MACRO_END

#define CYG_TRACE3( _bool_, _msg_, a, b, c )                    \

    CYG_MACRO_START                                             \

    if ( ( _bool_ ) )                                           \

        CYG_TRACE_docall4( _msg_, a, b, c, 0 );                 \

    CYG_MACRO_END

#define CYG_TRACE4( _bool_, _msg_, a, b, c, d )                 \

    CYG_MACRO_START                                             \

    if ( ( _bool_ ) )                                           \

        CYG_TRACE_docall4( _msg_, a, b, c, d );                 \

    CYG_MACRO_END

#define CYG_TRACE5( _bool_, _msg_, a, b, c, d, e )              \

    CYG_MACRO_START                                             \

    if ( ( _bool_ ) )                                           \

        CYG_TRACE_docall6( _msg_, a, b, c, d, e, 0 );           \

    CYG_MACRO_END

#define CYG_TRACE6( _bool_, _msg_, a, b, c, d, e, f )           \

    CYG_MACRO_START                                             \

    if ( ( _bool_ ) )                                           \

        CYG_TRACE_docall6( _msg_, a, b, c, d, e, f );           \

    CYG_MACRO_END

#define CYG_TRACE7( _bool_, _msg_, a, b, c, d, e, f, g )        \

    CYG_MACRO_START                                             \

    if ( ( _bool_ ) )                                           \

        CYG_TRACE_docall8( _msg_, a, b, c, d, e, f, g, 0 );     \

    CYG_MACRO_END

#define CYG_TRACE8( _bool_, _msg_, a, b, c, d, e, f, g, h )     \

    CYG_MACRO_START                                             \

    if ( ( _bool_ ) )                                           \

        CYG_TRACE_docall8( _msg_, a, b, c, d, e, f, g, h );     \

    CYG_MACRO_END

// -------------------------------------------------------------------------

// Report function entry and exit.

// In C++ the macro CYG_REPORT_FUNCTION should appear as the first line of

// any function. It will generate a message whenever the function is entered

// and when it is exited.

// In C the macro should appear as the first statement after any local variable

// definitions. No exit message will be generated unless CYG_REPORT_RETURN is

// placed just before each return.

// Where a piece of code is to be compiled with both C and C++, the above

// rules for C should be followed.

#ifdef CYGDBG_INFRA_DEBUG_FUNCTION_REPORTS

#ifdef __cplusplus

class Cyg_TraceFunction_Report_

{

public:

    int   cond;

    const char *func;

    const char *file;

    cyg_uint32 lnum;

#ifdef CYGDBG_INFRA_DEBUG_TRACE_MESSAGE

    const char *exitmsg;

    CYG_ADDRWORD exitvalue;

    enum { UNSET = 0, SET, VOID } exitset;

#endif

    Cyg_TraceFunction_Report_(

        int condition, const char *psz_func, const char *psz_file,

        cyg_uint32 linenum)

    {

        cond = condition;

        func = psz_func;

        file = psz_file;

        lnum = linenum;

#ifdef CYGDBG_INFRA_DEBUG_TRACE_MESSAGE

        exitmsg = NULL;

        exitset  = UNSET;

        if ( cond )

            cyg_tracemsg( cyg_trace_enter, func, file, lnum, "enter");

#else

        if ( cond )

            cyg_tracenomsg( func, file, lnum );

#endif

    };

    Cyg_TraceFunction_Report_(

        int condition, const char *psz_func, const char *psz_file,

        cyg_uint32 linenum, const char *psz_exitmsg )

    {

        cond = condition;

        func = psz_func;

        file = psz_file;

        lnum = linenum;

#ifdef CYGDBG_INFRA_DEBUG_TRACE_MESSAGE

        exitmsg = psz_exitmsg;

        exitset  = UNSET;

        if ( cond )

            cyg_tracemsg( cyg_trace_enter, func, file, lnum, "enter");

#else

        CYG_UNUSED_PARAM( const char *, psz_exitmsg );

        if ( cond )

            cyg_tracenomsg( func, file, lnum );

#endif

    };

    inline void set_exitvoid( cyg_uint32 linenum )

    {

        lnum = linenum;

#ifdef CYGDBG_INFRA_DEBUG_TRACE_MESSAGE

        CYG_ASSERT( NULL == exitmsg, "exitvoid used in typed function" );

        CYG_ASSERT( UNSET == exitset, "exitvoid used when arg already set" );

        exitset = VOID;

#endif

    }

    inline void set_exitvalue( cyg_uint32 linenum, CYG_ADDRWORD retcode )

    {

        lnum = linenum;

#ifdef CYGDBG_INFRA_DEBUG_TRACE_MESSAGE

        CYG_ASSERT( UNSET == exitset, "exitvalue used when arg already set" );

        exitvalue = retcode;

        exitset = SET;

#else

        CYG_UNUSED_PARAM( CYG_ADDRWORD, retcode );

#endif

    }

    ~Cyg_TraceFunction_Report_()

    {

        if ( cond ) {

#ifdef CYGDBG_INFRA_DEBUG_TRACE_MESSAGE

            if ( VOID == exitset )

                cyg_tracemsg( cyg_trace_return, func, file, lnum,

                              "return void");

            else if ( UNSET == exitset )

                cyg_tracemsg( cyg_trace_return, func, file, lnum,

                              "RETURNING UNSET!");

            else if ( NULL == exitmsg )

                cyg_tracemsg2( cyg_trace_return, func, file, lnum,

                               "return %08x", exitvalue, 0 );

            else

                cyg_tracemsg2( cyg_trace_return, func, file, lnum,

                               exitmsg, exitvalue, 0 );

#else

            cyg_tracenomsg( func, file, lnum );

#endif

        }

    }

};

// These have no CYG_MACRO_START,END around because it is required

// that the scope of the object be the whole function body.  Get it?

// These are the unconditional versions:

#define CYG_REPORT_FUNCTION()                           \

  Cyg_TraceFunction_Report_ cyg_tracefunction_report_(  \

        1, __PRETTY_FUNCTION__,                         \

        __FILE__, __LINE__ )

#define CYG_REPORT_FUNCTYPE( _exitmsg_ )                \

  Cyg_TraceFunction_Report_ cyg_tracefunction_report_(  \

        1, __PRETTY_FUNCTION__,                         \

        __FILE__, __LINE__, _exitmsg_ )

#define CYG_REPORT_FUNCNAME( _name_ )                   \

  Cyg_TraceFunction_Report_ cyg_tracefunction_report_(  \

        1, _name_,                                      \

        __FILE__, __LINE__ )

#define CYG_REPORT_FUNCNAMETYPE( _name_, _exitmsg_  )   \

  Cyg_TraceFunction_Report_ cyg_tracefunction_report_(  \

        1, _name_,                                      \

        __FILE__, __LINE__, _exitmsg_ )

// These are conditioned on macro CYG_REPORT_USER_BOOL

// (which you better have defined)

#define CYG_REPORT_FUNCTIONC()                          \

  Cyg_TraceFunction_Report_ cyg_tracefunction_report_(  \

        CYG_REPORT_USER_BOOL, __PRETTY_FUNCTION__,      \

        __FILE__, __LINE__ )

#define CYG_REPORT_FUNCTYPEC( _exitmsg_ )               \

  Cyg_TraceFunction_Report_ cyg_tracefunction_report_(  \

        CYG_REPORT_USER_BOOL, __PRETTY_FUNCTION__,      \

        __FILE__, __LINE__, _exitmsg_ )

#define CYG_REPORT_FUNCNAMEC( _name_ )                  \

  Cyg_TraceFunction_Report_ cyg_tracefunction_report_(  \

        CYG_REPORT_USER_BOOL, _name_,                   \

        __FILE__, __LINE__ )

#define CYG_REPORT_FUNCNAMETYPEC( _name_, _exitmsg_  )  \

  Cyg_TraceFunction_Report_ cyg_tracefunction_report_(  \

        CYG_REPORT_USER_BOOL, _name_,                   \

        __FILE__, __LINE__, _exitmsg_ )

#define CYG_REPORT_RETURN() CYG_MACRO_START             \

    cyg_tracefunction_report_.set_exitvoid( __LINE__ ); \

CYG_MACRO_END

#define CYG_REPORT_RETVAL( _value_) CYG_MACRO_START     \

    cyg_tracefunction_report_.set_exitvalue(            \

        __LINE__, (CYG_ADDRWORD)(_value_) );            \

CYG_MACRO_END

#else   // not __cplusplus

struct Cyg_TraceFunction_Report_

{

    int   cond;

    const char *func;

    const char *file; /* not strictly needed in plain 'C' */

    cyg_uint32 lnum; /* nor this */

#ifdef CYGDBG_INFRA_DEBUG_TRACE_MESSAGE

    const char *exitmsg;

    CYG_ADDRWORD exitvalue;

    int exitset;

#endif

};

#ifdef CYGDBG_INFRA_DEBUG_TRACE_MESSAGE

#define CYG_REPORT_FUNCTION_ENTER_INTERNAL() CYG_MACRO_START            \

  if ( cyg_tracefunction_report_.cond )                                 \

    cyg_tracemsg( cyg_trace_enter,                                      \

                  cyg_tracefunction_report_.func,                       \

                  cyg_tracefunction_report_.file,                       \

                  cyg_tracefunction_report_.lnum,                       \

                  "enter" );                                            \

CYG_MACRO_END

#define CYG_REPORT_FUNCTION_CONSTRUCT( _c_, _fn_,_fl_,_l_,_xm_,_xv_,_xs_ ) \

        { _c_, _fn_, _fl_, _l_, _xm_, _xv_, _xs_ }

#else // do not CYGDBG_INFRA_DEBUG_TRACE_MESSAGE

#define CYG_REPORT_FUNCTION_ENTER_INTERNAL() CYG_MACRO_START            \

  if ( cyg_tracefunction_report_.cond )                                 \

    cyg_tracenomsg( cyg_tracefunction_report_.func,                     \

                    cyg_tracefunction_report_.file,                     \

                    cyg_tracefunction_report_.lnum );                   \

CYG_MACRO_END

#define CYG_REPORT_FUNCTION_CONSTRUCT( _c_, _fn_,_fl_,_l_,_xm_,_xv_,_xs_ ) \

        { _c_, _fn_, _fl_, _l_ }

#endif // not CYGDBG_INFRA_DEBUG_TRACE_MESSAGE

// These have no CYG_MACRO_START,END around because it is required

// that the scope of the object be the whole function body.  Get it?

// These are the unconditional versions:

#define CYG_REPORT_FUNCTION()                                           \

    struct Cyg_TraceFunction_Report_ cyg_tracefunction_report_ =        \

    CYG_REPORT_FUNCTION_CONSTRUCT(                                      \

        1, __PRETTY_FUNCTION__, __FILE__, __LINE__, NULL, 0, 0 );       \