/**

** @file mruby/throw.h - mruby exception throwing handler

**

** See Copyright Notice in mruby.h

*/

#ifndef MRB_THROW_H

#define MRB_THROW_H

#if defined(MRB_USE_CXX_ABI) && !defined(__cplusplus)

# error Trying to use C++ exception handling in C code

#endif

#if defined(MRB_USE_CXX_EXCEPTION)

# if defined(__cplusplus)

#define MRB_TRY(buf) try {

#define MRB_CATCH(buf) } catch(mrb_jmpbuf_impl e) { if (e != (buf)->impl) { throw e; }

#define MRB_END_EXC(buf) }

#define MRB_THROW(buf) throw((buf)->impl)

typedef mrb_int mrb_jmpbuf_impl;

# else

# error "need to be compiled with C++ compiler"

# endif /* __cplusplus */

#else

#include <setjmp.h>

#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)

#define MRB_SETJMP _setjmp

#define MRB_LONGJMP _longjmp

#elif defined(__MINGW64__) && defined(__GNUC__) && __GNUC__ >= 4

#define MRB_SETJMP __builtin_setjmp

#define MRB_LONGJMP __builtin_longjmp

#else

#define MRB_SETJMP setjmp

#define MRB_LONGJMP longjmp

#endif

#define MRB_TRY(buf) if (MRB_SETJMP((buf)->impl) == 0) {

#define MRB_CATCH(buf) } else {

#define MRB_END_EXC(buf) }

#define MRB_THROW(buf) MRB_LONGJMP((buf)->impl, 1);

#define mrb_jmpbuf_impl jmp_buf

#endif

#if defined(MRB_USE_CXX_EXCEPTION)

extern mrb_int mrb_jmpbuf_id;

#endif

struct mrb_jmpbuf {

mrb_jmpbuf_impl impl;

#if defined(MRB_USE_CXX_EXCEPTION)

mrb_jmpbuf() : impl(mrb_jmpbuf_id++) {}

#endif

};

#endif /* MRB_THROW_H */