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//===- Exception.h - Generic language-independent exceptions ----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the the shared data structures used by all language
// specific exception handling runtime libraries.
//
// NOTE NOTE NOTE: A copy of this file lives in llvmgcc/libstdc++-v3/libsupc++/
// Any modifications to this file must keep it in sync!
//
//===----------------------------------------------------------------------===//
#ifndef EXCEPTION_H
#define EXCEPTION_H
struct llvm_exception {
// ExceptionDestructor - This call-back function is used to destroy the
// current exception, without requiring the caller to know what the concrete
// exception type is.
//
void (*ExceptionDestructor)(llvm_exception *);
// ExceptionType - This field identifies what runtime library this exception
// came from. Currently defined values are:
// 0 - Error
// 1 - longjmp exception (see longjmp-exception.c)
// 2 - C++ exception (see c++-exception.c)
//
unsigned ExceptionType;
// Next - This points to the next exception in the current stack.
llvm_exception *Next;
// HandlerCount - This is a count of the number of handlers which have
// currently caught this exception. If the handler is caught and this number
// falls to zero, the exception is destroyed.
//
unsigned HandlerCount;
// isRethrown - This field is set on an exception if it has been 'throw;'n.
// This is needed because the exception might exit through a number of the
// end_catch statements matching the number of begin_catch statements that
// have been processed. When this happens, the exception should become
// uncaught, not dead.
//
int isRethrown;
};
enum {
ErrorException = 0,
SJLJException = 1,
CXXException = 2,
};
// Language independent exception handling API...
//
extern "C" {
bool __llvm_eh_has_uncaught_exception() throw();
void *__llvm_eh_current_uncaught_exception_type(unsigned HandlerType) throw();
void __llvm_eh_add_uncaught_exception(llvm_exception *E) throw();
llvm_exception *__llvm_eh_get_uncaught_exception() throw();
llvm_exception *__llvm_eh_pop_from_uncaught_stack() throw();
}
#endif
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