mirror of
https://github.com/mruby/mruby
synced 2026-06-08 16:11:16 +00:00
Yukihiro "Matz" Matsumoto
124 lines
3.6 KiB
C
124 lines
3.6 KiB
C
/**
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** @file mruby/error.h - Exception class
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**
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** See Copyright Notice in mruby.h
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*/
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#ifndef MRUBY_ERROR_H
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#define MRUBY_ERROR_H
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#include "common.h"
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/**
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* MRuby error handling.
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*/
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MRB_BEGIN_DECL
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struct RException {
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MRB_OBJECT_HEADER;
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struct iv_tbl *iv;
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struct RObject *mesg; // NULL or probably RString
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struct RObject *backtrace; // NULL, RArray or RData
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};
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/* error that should terminate execution */
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#define MRB_EXC_EXIT 65536
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#define MRB_EXC_EXIT_P(e) ((e)->flags & MRB_EXC_EXIT)
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/* retrieve status value from exc; need <mruby/variable.h> and <mruby/presym.h> */
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#define MRB_EXC_EXIT_STATUS(mrb,e) ((int)mrb_as_int((mrb),mrb_obj_iv_get((mrb),(e),MRB_SYM(status))))
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/* exit with SystemExit status */
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#define MRB_EXC_CHECK_EXIT(mrb,e) do {if (MRB_EXC_EXIT_P(e)) exit(MRB_EXC_EXIT_STATUS((mrb),(e)));} while (0)
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#define mrb_exc_ptr(v) ((struct RException*)mrb_ptr(v))
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MRB_API mrb_noreturn void mrb_sys_fail(mrb_state *mrb, const char *mesg);
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MRB_API mrb_value mrb_exc_new_str(mrb_state *mrb, struct RClass* c, mrb_value str);
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#define mrb_exc_new_lit(mrb, c, lit) mrb_exc_new_str(mrb, c, mrb_str_new_lit(mrb, lit))
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MRB_API mrb_noreturn void mrb_no_method_error(mrb_state *mrb, mrb_sym id, mrb_value args, const char *fmt, ...);
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#if defined(MRB_64BIT) || defined(MRB_USE_FLOAT32) || defined(MRB_NAN_BOXING) || defined(MRB_WORD_BOXING)
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struct RBreak {
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MRB_OBJECT_HEADER;
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const struct RProc *proc;
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mrb_value val;
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};
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#define mrb_break_value_get(brk) ((brk)->val)
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#define mrb_break_value_set(brk, v) ((brk)->val = v)
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#else
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struct RBreak {
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MRB_OBJECT_HEADER;
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const struct RProc *proc;
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union mrb_value_union value;
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};
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#define RBREAK_VALUE_TT_MASK ((1 << 8) - 1)
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static inline mrb_value
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mrb_break_value_get(struct RBreak *brk)
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{
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mrb_value val;
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val.value = brk->value;
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val.tt = (enum mrb_vtype)(brk->flags & RBREAK_VALUE_TT_MASK);
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return val;
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}
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static inline void
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mrb_break_value_set(struct RBreak *brk, mrb_value val)
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{
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brk->value = val.value;
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brk->flags &= ~RBREAK_VALUE_TT_MASK;
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brk->flags |= val.tt;
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}
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#endif /* MRB_64BIT || MRB_USE_FLOAT32 || MRB_NAN_BOXING || MRB_WORD_BOXING */
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#define mrb_break_proc_get(brk) ((brk)->proc)
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#define mrb_break_proc_set(brk, p) ((brk)->proc = p)
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/**
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* Error check
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*
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*/
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/* clear error status in the mrb_state structure */
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MRB_API void mrb_clear_error(mrb_state *mrb);
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/* returns TRUE if error in the previous call; internally calls mrb_clear_error() */
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MRB_API mrb_bool mrb_check_error(mrb_state *mrb);
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/**
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* Protect
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*
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*/
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typedef mrb_value mrb_protect_error_func(mrb_state *mrb, void *userdata);
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MRB_API mrb_value mrb_protect_error(mrb_state *mrb, mrb_protect_error_func *body, void *userdata, mrb_bool *error);
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/**
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* Protect (takes mrb_value for body argument)
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*
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* Implemented in the mruby-error mrbgem
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*/
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MRB_API mrb_value mrb_protect(mrb_state *mrb, mrb_func_t body, mrb_value data, mrb_bool *state);
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/**
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* Ensure
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*
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* Implemented in the mruby-error mrbgem
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*/
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MRB_API mrb_value mrb_ensure(mrb_state *mrb, mrb_func_t body, mrb_value b_data,
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mrb_func_t ensure, mrb_value e_data);
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/**
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* Rescue
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*
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* Implemented in the mruby-error mrbgem
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*/
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MRB_API mrb_value mrb_rescue(mrb_state *mrb, mrb_func_t body, mrb_value b_data,
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mrb_func_t rescue, mrb_value r_data);
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/**
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* Rescue exception
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*
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* Implemented in the mruby-error mrbgem
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*/
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MRB_API mrb_value mrb_rescue_exceptions(mrb_state *mrb, mrb_func_t body, mrb_value b_data,
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mrb_func_t rescue, mrb_value r_data,
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mrb_int len, struct RClass **classes);
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MRB_END_DECL
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#endif /* MRUBY_ERROR_H */
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