Remove SIGCHLD `waidpid`. (#7527)

* Remove `waitpid_lock` and related code.

* Remove un-necessary test.

* Remove `rb_thread_sleep_interruptible` dead code.

1 files changed, 0 insertions, 4 deletions

diff --git a/vm.c b/vm.c
index 3c18c9c5a5..b4aa2a04a9 100644
--- a/vm.c
+++ b/vm.c
@@ -2877,7 +2877,6 @@ ruby_vm_destruct(rb_vm_t *vm)
         if (objspace) {
             rb_objspace_free(objspace);
         }
-        rb_native_mutex_destroy(&vm->waitpid_lock);
         rb_native_mutex_destroy(&vm->workqueue_lock);
         /* after freeing objspace, you *can't* use ruby_xfree() */
         ruby_mimfree(vm);
@@ -2887,7 +2886,6 @@ ruby_vm_destruct(rb_vm_t *vm)
     return 0;
 }
 
-size_t rb_vm_memsize_waiting_list(struct ccan_list_head *waiting_list); // process.c
 size_t rb_vm_memsize_waiting_fds(struct ccan_list_head *waiting_fds); // thread.c
 size_t rb_vm_memsize_postponed_job_buffer(void); // vm_trace.c
 size_t rb_vm_memsize_workqueue(struct ccan_list_head *workqueue); // vm_trace.c
@@ -2944,8 +2942,6 @@ vm_memsize(const void *ptr)
 
     return (
         sizeof(rb_vm_t) +
-        rb_vm_memsize_waiting_list(&vm->waiting_pids) +
-        rb_vm_memsize_waiting_list(&vm->waiting_grps) +
         rb_vm_memsize_waiting_fds(&vm->waiting_fds) +
         rb_st_memsize(vm->loaded_features_index) +
         rb_st_memsize(vm->loading_table) +