tbr.cc

#include <ruby.h>

VALUE blocking_function(void *data) {
    throw "die die die";
}

VALUE run(VALUE self) {
    try {
        rb_thread_blocking_region(blocking_function, 0, 0, 0);
    }
    catch (const char *e) {
        printf("caught: %s\n", e);
    }
    return Qtrue;
}

extern "C" {
    void Init_tbr() {
        VALUE mTBR = rb_define_module("TBR");
        rb_define_module_function(mTBR, "run", RUBY_METHOD_FUNC(run), 0);
    }
}