Bug #4289 » 0002-error.c-rb_mod_sys_fail-use-subclass-and-cache.patch
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extern const char ruby_description[];
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static VALUE mod_sys_fail_cache;
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static const char *
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rb_strerrno(int err)
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{
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| ... | ... | |
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void
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rb_mod_sys_fail(VALUE mod, const char *mesg)
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{
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VALUE exc = make_errno_exc(mesg);
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rb_extend_object(exc, mod);
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int n = errno;
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int need_aset_tmp = 0;
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VALUE super_class;
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VALUE cached_class;
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VALUE per_class;
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VALUE exc;
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VALUE arg;
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errno = 0;
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if (n == 0) {
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rb_bug("rb_mod_sys_fail(%s) - errno == 0", mesg ? mesg : "");
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}
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super_class = get_syserr(n);
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if (! mod_sys_fail_cache) {
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mod_sys_fail_cache = rb_hash_new();
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rb_global_variable(&mod_sys_fail_cache);
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}
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per_class = rb_hash_aref(mod_sys_fail_cache, super_class);
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if (NIL_P(per_class)) {
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need_aset_tmp = 1;
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per_class = rb_hash_new();
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}
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cached_class = rb_hash_aref(per_class, mod);
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if (NIL_P(cached_class)) {
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cached_class = rb_obj_dup(super_class);
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rb_include_module(cached_class, mod);
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rb_hash_aset(per_class, mod, cached_class);
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if (need_aset_tmp)
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rb_hash_aset(mod_sys_fail_cache, super_class, per_class);
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}
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arg = mesg ? rb_str_new2(mesg) : Qnil;
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exc = rb_class_new_instance(1, &arg, cached_class);
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rb_exc_raise(exc);
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}
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