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/* -*- C++ -*- */
//=============================================================================
/**
* @file Svc_Conf.h
*
* $Id$
*
* @author Doug Schmidt
*/
//=============================================================================
#ifndef ACE_SVC_CONF_H
#define ACE_SVC_CONF_H
#include "ace/pre.h"
// Globally visible macros, type decls, and extern var decls for
// Service Configurator utility.
#include "ace/Obstack.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "ace/Service_Config.h"
#include "ace/Parse_Node.h"
#if (ACE_USES_CLASSIC_SVC_CONF == 1)
// Forward declarations.
struct ace_yy_buffer_state;
// The following yylex() declarations require support for reentrant
// parser generation (e.g. from GNU Bison).
#if defined (DEBUGGING)
#if defined (ACE_YY_DECL)
#undef ACE_YY_DECL
#endif /* ACE_YY_DECL */
#define ACE_YY_DECL extern "C" char *ace_yylex (ACE_YYSTYPE *ace_yylval, void *ACE_YYLEX_PARAM)
#else
#define ACE_YY_DECL extern "C" int ace_yylex (ACE_YYSTYPE *ace_yylval, void *ACE_YYLEX_PARAM)
#endif /* DEBUGGING */
extern void ace_yy_delete_buffer (ace_yy_buffer_state *buffer);
/**
* @class ACE_Svc_Conf_Param
*
* @brief An instance of this object will be passed down to the
* yyparse() and yylex() functions.
*
* This class retains the state for a given parse/scan. It primarily
* makes it possible to hold the static object lock in the scanner
* for as short a period of time as possible. The resulting finer
* grained locking prevents deadlocks from occuring when scanning a
* `svc.conf' file and activating an ACE_Task, for example, as a
* result of processing the directives in that file.
*/
class ACE_Svc_Conf_Param
{
public:
enum SVC_CONF_PARAM_TYPE
{
/// The lexer will scan a file containing one or more directives.
SVC_CONF_FILE,
/// The lexer will scan a string containing a directive.
SVC_CONF_DIRECTIVE
};
/// Constructor
ACE_Svc_Conf_Param (FILE *file)
: type (SVC_CONF_FILE),
yyerrno (0),
yylineno (1),
buffer (0),
obstack ()
{
source.file = file;
}
/// Constructor
ACE_Svc_Conf_Param (const ACE_TCHAR *directive)
: type (SVC_CONF_DIRECTIVE),
yyerrno (0),
yylineno (1),
buffer (0),
obstack ()
{
source.directive = directive;
}
~ACE_Svc_Conf_Param (void)
{
ace_yy_delete_buffer (this->buffer);
}
public:
union
{
/// FILE stream from which directives will be scanned and parsed.
FILE *file;
/// String containing directive that will be scanned and parsed.
const ACE_TCHAR *directive;
} source;
// Discriminant use to determine which union member to use.
SVC_CONF_PARAM_TYPE type;
/// Keeps track of the number of errors encountered so far.
int yyerrno;
/// Keeps track of the current line number for error-handling routine.
int yylineno;
/// Lexer buffer that corresponds to the current Service
/// Configurator file/direct scan.
ace_yy_buffer_state *buffer;
/// Obstack used for efficient memory allocation when
/// parsing/scanning a service configurator directive.
ACE_Obstack_T<ACE_TCHAR> obstack;
};
// Parameter that is passed down to the yyparse() function, and
// eventually to yylex().
#define ACE_YYPARSE_PARAM ace_svc_conf_parameter
#define ACE_YYLEX_PARAM ACE_YYPARSE_PARAM
#define ACE_SVC_CONF_PARAM (ACE_static_cast (ACE_Svc_Conf_Param *, ACE_YYLEX_PARAM))
// The following definition for the ACE_YYSTYPE must occur before
// ACE_YY_DECL is declared since ACE_YY_DECL expands to function
// prototypes that use ACE_YYSTYPE.
typedef union
{
int type_;
ACE_Location_Node *location_node_;
ACE_Parse_Node *parse_node_;
ACE_Static_Node *static_node_;
ACE_Service_Type *svc_record_;
ACE_TCHAR *ident_;
} ACE_YYSTYPE;
// Forward declaration
struct ace_yy_buffer_state;
/// Create and push a new lexer buffer on to the buffer stack for use
/// when scanning the given file.
void ace_yy_push_buffer (FILE *file,
ace_yy_buffer_state *&buffer);
/// Create and push a new lexer buffer on to the buffer stack for use
/// when scanning the given directive.
void ace_yy_push_buffer (const ACE_TCHAR *directive,
ace_yy_buffer_state *&buffer);
/// Pop the current lexer buffer off of the buffer stack and
/// deallocate it.
void ace_yy_pop_buffer (ace_yy_buffer_state *buf);
/// Performs the parsing
#ifdef ACE_YYPARSE_PARAM
int ace_yyparse (void *);
#else
int ace_yyparse (void);
#endif
/// Performs the lexical analysis
ACE_YY_DECL;
/// Name of input stream
extern FILE *ace_yyin;
/// Error handling routine required by YACC or BISON
void ace_yyerror (const ACE_TCHAR *);
/// Keeps track of the current line number for error-handling routine
extern int ace_yylineno;
/// Keeps track of the number of errors encountered so far
extern int ace_yyerrno;
/// Holds the lexeme for the current token
extern ACE_TCHAR *ace_yytext;
/// Holds the length of the lexeme for the current token
extern int ace_yyleng;
#endif /* ACE_USES_CLASSIC_SVC_CONF == 1 */
/// Factory that creates a new ACE_Service_Type_Impl.
extern ACE_Service_Type_Impl *
ace_create_service_type (const ACE_TCHAR *,
int,
void *,
unsigned int,
ACE_Service_Object_Exterminator = 0);
#include "ace/post.h"
#endif /* ACE_SVC_CONF_H */
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