#include <Environment.h>
Collaboration diagram for CORBA::Environment:
Public Types | |
typedef CORBA::Environment_ptr | _ptr_type |
typedef CORBA::Environment_var | _var_type |
typedef CORBA::Environment_out | _out_type |
Public Member Functions | |
Environment (void) | |
Environment (const Environment &ACE_TRY_ENV) | |
Copy constructor. | |
Environment & | operator= (const Environment &ACE_TRY_ENV) |
Assingment. | |
~Environment (void) | |
Destructor, release the exception. | |
int | exception_type (void) const |
const char * | exception_id (void) const |
return the repository ID for the exception. | |
void | clear (void) |
Clear the exception. | |
void | print_exception (const char *info, FILE *f=stdout) const |
Static Public Member Functions | |
static Environment * | _duplicate (Environment *) |
Some static methods that need to be defined in every pseudo object. | |
static Environment * | _nil (void) |
static CORBA::Environment & | default_environment (void) |
Public Attributes | |
CORBA::Exception *exception void | const |
Return the contained CORBA::Exception. | |
void exception CORBA::Exception * | ex |
Set the contained CORBA::Exception to <ex>. | |
Private Member Functions | |
Environment (TAO_ORB_Core *orb_core) | |
Private Attributes | |
CORBA::Exception * | exception_ |
Pointer to the exception object contained in the environment. | |
Environment * | previous_ |
The previous environment on the "default environment stack". |
A CORBA::Environment is a way to automagically ensure that exception data is freed -- the "var" class for Exceptions. It adds just a bit of convenience function support, helping classify exceptions as well as reducing memory leakage. The thread has a default environment to simplify porting between platforms that support native C++ exceptions and those that don't. This is a TSS resource (always), but with a twist: if the user creates a new environment the old one is "pushed" (actually the new one remembers it), eventually the new environment destructor pops itself from the stack and we recover the old environment. This means that if the user create a new environment and somebody calls a function using the default one the exception will still be received in the environment created by the user. The only drawback is that environments life time must nest properly, this shouldn't be a problem because environments are usually created on the stack, but, the spec allows their creation on the heap and/or as class members; we need to investigate the tradeoffs and take a decision.
Definition at line 73 of file Environment.h.
Definition at line 137 of file Environment.h.
Definition at line 135 of file Environment.h.
Definition at line 136 of file Environment.h.
TAO_BEGIN_VERSIONED_NAMESPACE_DECL CORBA::Environment::Environment | ( | void | ) |
The default constructor. The environment will hold no exceptions.
Definition at line 20 of file Environment.cpp.
00021 : exception_ (0) 00022 , previous_ (0) 00023 { 00024 }
CORBA::Environment::Environment | ( | const Environment & | ACE_TRY_ENV | ) |
Copy constructor.
Definition at line 26 of file Environment.cpp.
References CORBA::Exception::_tao_duplicate(), and exception_.
00027 : exception_ (0) 00028 , previous_ (0) 00029 { 00030 if (rhs.exception_) 00031 this->exception_ = rhs.exception_->_tao_duplicate (); 00032 }
CORBA::Environment::~Environment | ( | void | ) |
Destructor, release the exception.
Definition at line 58 of file Environment.cpp.
References clear(), TAO_ORB_Core::default_environment(), and TAO_ORB_Core_instance().
00059 { 00060 this->clear (); 00061 00062 // If previous is 0 then this is the first Environment, allocated 00063 // with the ORB, it shouldn't try to pop because the ORB is beign 00064 // destroyed also. 00065 if (this->previous_ != 0) 00066 TAO_ORB_Core_instance ()->default_environment (this->previous_); 00067 }
CORBA::Environment::Environment | ( | TAO_ORB_Core * | orb_core | ) | [private] |
Initialize using a well known ORB Core; this is intended for the bootstraping of the ORB_Core, not for general consumption.
Definition at line 34 of file Environment.cpp.
References TAO_ORB_Core::default_environment().
00035 : exception_ (0) 00036 , previous_ (orb_core->default_environment ()) 00037 { 00038 orb_core->default_environment (this); 00039 }
ACE_INLINE CORBA::Environment * CORBA::Environment::_duplicate | ( | Environment * | ) | [static] |
Some static methods that need to be defined in every pseudo object.
Definition at line 33 of file Environment.inl.
References ACE_NEW_RETURN.
00034 { 00035 if (x == 0) 00036 { 00037 return 0; 00038 } 00039 00040 CORBA::Environment* ptr = 0; 00041 ACE_NEW_RETURN (ptr, 00042 CORBA::Environment (*x), 00043 0); 00044 return ptr; 00045 }
ACE_INLINE CORBA::Environment_ptr CORBA::Environment::_nil | ( | void | ) | [static] |
void CORBA::Environment::clear | ( | void | ) |
Clear the exception.
Definition at line 98 of file Environment.cpp.
References exception_.
Referenced by default_environment(), and ~Environment().
00099 { 00100 delete this->exception_; 00101 this->exception_ = 0; 00102 }
CORBA::Environment & CORBA::Environment::default_environment | ( | void | ) | [static] |
Definition at line 105 of file Environment.cpp.
References clear(), TAO_ORB_Core::default_environment(), TAO_default_environment(), and TAO_ORB_Core_instance().
00106 { 00107 // 00108 // If we are using native C++ exceptions the user is *not* supposed 00109 // to clear the environment every time she calls into TAO. In fact 00110 // the user is not supposed to use the environment at all! 00111 // 00112 // But TAO is using the default environment internally, thus 00113 // somebody has to clear it. Since TAO passes the environment around 00114 // this function should only be called when going from the user code 00115 // into TAO's code. 00116 // 00117 // This is not an issue when using the alternative C++ mapping (with 00118 // the Environment argument) because then the user is supposed to 00119 // clear the environment before calling into the ORB. 00120 // 00121 TAO_ORB_Core_instance ()->default_environment ()->clear (); 00122 00123 return TAO_default_environment ();; 00124 }
const char * CORBA::Environment::exception_id | ( | void | ) | const |
return the repository ID for the exception.
Definition at line 167 of file Environment.cpp.
References CORBA::Exception::_rep_id(), and exception_.
00168 { 00169 if (this->exception_ == 0) 00170 return 0; 00171 00172 return this->exception_->_rep_id (); 00173 }
int CORBA::Environment::exception_type | ( | void | ) | const |
Return if the exception is a user exception or a system exception.
Definition at line 129 of file Environment.cpp.
References CORBA::Exception::_rep_id(), exception_, CORBA::NO_EXCEPTION, ACE_OS::strncmp(), CORBA::SYSTEM_EXCEPTION, and CORBA::USER_EXCEPTION.
00130 { 00131 // @@ Carlos, is this stuff that's properly "transformed" for EBCDIC 00132 // platforms?! 00133 // @@ Doug: Yes, they are used to compare against the _id() of the 00134 // exception, which should have been mappend to the native 00135 // codeset. Notice the "should" we haven't tried that stuff yet, 00136 // and i find it hard to keep track of all the transformations 00137 // going on, specially for the TypeCodes that are generated by 00138 // the IDL compiler vs. the ones hard-coded in 00139 // $TAO_ROOT/tao/Typecode_Constants.cpp 00140 00141 static char sysex_prefix [] = "IDL:omg.org/CORBA/"; 00142 static char typecode_extra [] = "TypeCode/"; 00143 00144 if (!this->exception_) 00145 { 00146 return CORBA::NO_EXCEPTION; 00147 } 00148 00149 // All exceptions currently (CORBA 2.0) defined in the CORBA scope 00150 // are system exceptions ... except for a couple that are related to 00151 // TypeCodes. 00152 00153 const char *id = this->exception_->_rep_id (); 00154 00155 if ((ACE_OS::strncmp (id, 00156 sysex_prefix, 00157 sizeof sysex_prefix - 1) == 0 00158 && ACE_OS::strncmp (id + sizeof sysex_prefix - 1, 00159 typecode_extra, 00160 sizeof typecode_extra - 1) != 0)) 00161 return CORBA::SYSTEM_EXCEPTION; 00162 else 00163 return CORBA::USER_EXCEPTION; 00164 }
CORBA::Environment & CORBA::Environment::operator= | ( | const Environment & | ACE_TRY_ENV | ) |
Assingment.
Definition at line 42 of file Environment.cpp.
References exception_, and previous_.
00043 { 00044 CORBA::Environment tmp (rhs); 00045 { 00046 CORBA::Exception *tmp_ex = this->exception_; 00047 this->exception_ = tmp.exception_; 00048 tmp.exception_ = tmp_ex; 00049 } 00050 { 00051 CORBA::Environment *tmp_env = this->previous_; 00052 this->previous_ = rhs.previous_; 00053 tmp.previous_ = tmp_env; 00054 } 00055 return *this; 00056 }
void CORBA::Environment::print_exception | ( | const char * | info, | |
FILE * | f = stdout | |||
) | const |
Print the exception to output determined by f. This function is not CORBA compliant.
Definition at line 179 of file Environment.cpp.
References CORBA::SystemException::_downcast(), CORBA::Exception::_rep_id(), CORBA::SystemException::_tao_print_system_exception(), ACE_ERROR, ACE_TEXT, ACE_TEXT_CHAR_TO_TCHAR, exception_, and LM_ERROR.
00181 { 00182 if (this->exception_) 00183 { 00184 const char *id = this->exception_->_rep_id (); 00185 00186 ACE_ERROR ((LM_ERROR, 00187 ACE_TEXT ("TAO: (%P|%t) EXCEPTION, %s\n"), 00188 ACE_TEXT_CHAR_TO_TCHAR (info))); 00189 00190 CORBA::SystemException *x2 = 00191 CORBA::SystemException::_downcast (this->exception_); 00192 00193 if (x2 != 0) 00194 x2->_tao_print_system_exception (); 00195 else 00196 // @@ we can use the exception's typecode to dump all the data 00197 // held within it ... 00198 00199 ACE_ERROR ((LM_ERROR, 00200 ACE_TEXT ("TAO: (%P|%t) user exception, ID '%s'\n"), 00201 ACE_TEXT_CHAR_TO_TCHAR (id))); 00202 } 00203 else 00204 ACE_ERROR ((LM_ERROR, 00205 ACE_TEXT ("TAO: (%P|%t) no exception, %s\n"), ACE_TEXT_CHAR_TO_TCHAR (info))); 00206 }
CORBA::Exception* exception void CORBA::Environment::const |
Return the contained CORBA::Exception.
CORBA::Environment retains ownership of the exception, this is contrary to the normal memory management rules in the C++ mapping, but actually mandated by the specification:
"C++ Language Mapping" (formal/00-01-02). Section 1.27 Environment (page 1-113)
Definition at line 102 of file Environment.h.
void exception CORBA::Exception* CORBA::Environment::ex |
Set the contained CORBA::Exception to <ex>.
CORBA::Environment assumes ownership of the exception, this is contrary to the normal memory management rules in the C++ mapping, but actually mandated by the specification:
"C++ Language Mapping" (formal/00-01-02). Section 1.27 Environment (page 1-113)
Definition at line 114 of file Environment.h.
CORBA::Exception* CORBA::Environment::exception_ [private] |
Pointer to the exception object contained in the environment.
Definition at line 147 of file Environment.h.
Referenced by clear(), Environment(), exception_id(), exception_type(), operator=(), and print_exception().
Environment* CORBA::Environment::previous_ [private] |
The previous environment on the "default environment stack".
Definition at line 150 of file Environment.h.
Referenced by operator=().