Avoid `abort()` when `FiberError` occurs in `mrb_fiber_resume()`
However, this may not be the case depending on where the `FiberError` raises.
MODIFY
mrbgems/mruby-fiber/src/fiber.c
mrbgems/mruby-fiber/src/fiber.c
#include <mruby.h>
#include <mruby/array.h>
#include <mruby/class.h>
+#include <mruby/error.h>
#include <mruby/proc.h>
#define fiber_ptr(o) ((struct RFiber*)mrb_ptr(o))
@@ -173,6 +174,26 @@ fiber_switch_context(mrb_state *mrb, struct mrb_context *c)
mrb->c = c;
}
+/*
+ * Argument mesg is limited to a string literal or "static const" string.
+ * Also, it must be called as `return fiber_error(...)`.
+ */
+static mrb_value
+fiber_error(mrb_state *mrb, const char *mesg)
+{
+ mrb_value str = mrb_str_new_static(mrb, mesg, strlen(mesg));
+ mrb_value exc = mrb_exc_new_str(mrb, E_FIBER_ERROR, str);
+
+ if (mrb->jmp) {
+ mrb_exc_raise(mrb, exc);
+ }
+
+ mrb->exc = mrb_obj_ptr(exc);
+
+ return exc;
+}
+
+/* This function must be called as `return fiber_switch(...)` */
static mrb_value
fiber_switch(mrb_state *mrb, mrb_value self, mrb_int len, const mrb_value *a, mrb_bool resume, mrb_bool vmexec)
{
@@ -186,15 +207,15 @@ fiber_switch(mrb_state *mrb, mrb_value self, mrb_int len, const mrb_value *a, mr
switch (status) {
case MRB_FIBER_TRANSFERRED:
if (resume) {
- mrb_raise(mrb, E_FIBER_ERROR, "resuming transferred fiber");
+ return fiber_error(mrb, "resuming transferred fiber");
}
break;
case MRB_FIBER_RUNNING:
case MRB_FIBER_RESUMED:
- mrb_raise(mrb, E_FIBER_ERROR, "double resume");
+ return fiber_error(mrb, "double resume");
break;
case MRB_FIBER_TERMINATED:
- mrb_raise(mrb, E_FIBER_ERROR, "resuming dead fiber");
+ return fiber_error(mrb, "resuming dead fiber");
break;
default:
break;
@@ -206,7 +227,7 @@ fiber_switch(mrb_state *mrb, mrb_value self, mrb_int len, const mrb_value *a, mr
mrb_value *b, *e;
if (!c->ci->proc) {
- mrb_raise(mrb, E_FIBER_ERROR, "double resume (current)");
+ return fiber_error(mrb, "double resume (current)");
}
if (vmexec) {
c->ci--; /* pop dummy callinfo */

Avoid `abort()` when `FiberError` occurs in `mrb_fiber_resume()`

However, this may not be the case depending on where the `FiberError` raises.