llvm/runtime/GCCLibraries/libexception/C++-Exception.h

//===- c++-exception.h - C++ Specific exception Handling --------*- C++ -*-===//
//
// This file defines the data structures and API used by the C++ exception
// handling runtime library.
//
//===----------------------------------------------------------------------===//

#ifndef CXX_EXCEPTION_H
#define CXX_EXCEPTION_H

#include "exception.h"
#include <typeinfo>

typedef struct llvm_cxx_exception {
  /* TypeInfo - A pointer to the C++ std::type_info object for this exception
   * class.  This is required because the class may not be polymorphic.
   */
  const std::type_info *TypeInfo;

  /* ExceptionObjectDestructor - A pointer to the function which destroys the
   * object represented by this exception.  This is required because the class
   * may not be polymorphic.  This may be null if there is no cleanup required.
   */
  void (*ExceptionObjectDestructor)(void *);

  /* UnexpectedHandler - This contains a pointer to the "unexpected" handler
   * which may be registered by the user program with set_unexpected.  Calls to
   * unexpected which are a result of an exception throw are supposed to use the
   * value of the handler at the time of the throw, not the currently set value.
   */
  void *UnexpectedHandler;

  /* TerminateHandler - This contains a pointer to the "terminate" handler which
   * may be registered by the user program with set_terminate.  Calls to
   * unexpected which are a result of an exception throw are supposed to use the
   * value of the handler at the time of the throw, not the currently set value.
   */
  void *TerminateHandler;

  /* BaseException - The language independent portion of the exception state.
   * This is at the end of the record so that we can add additional members to
   * this structure without breaking binary compatibility.
   */
  llvm_exception BaseException;
} llvm_cxx_exception;



extern "C" {
  void *__llvm_cxxeh_allocate_exception(unsigned NumBytes);
  void __llvm_cxxeh_free_exception(void *ObjectPtr);
  void __llvm_cxxeh_throw(void *ObjectPtr, const std::type_info *TypeInfoPtr,
                          void (*DtorPtr)(void*));

  void * __llvm_cxxeh_current_uncaught_exception_isa(const std::type_info *Ty);
  void *__llvm_cxxeh_begin_catch(void);
  void *__llvm_cxxeh_begin_catch_if_isa(const std::type_info *CatchType);
  void __llvm_cxxeh_end_catch(void);

  void __llvm_cxxeh_rethrow(void);
}

#endif