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, 8 deletions

diff --git a/vm_core.h b/vm_core.h
index 66602efea7..724c8cd739 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -145,9 +145,6 @@ extern int ruby_assert_critical_section_entered;
 #  define SIGCHLD_LOSSY (0)
 #endif
 
-/* define to 0 to test old code path */
-#define WAITPID_USE_SIGCHLD (RUBY_SIGCHLD || SIGCHLD_LOSSY)
-
 #if defined(SIGSEGV) && defined(HAVE_SIGALTSTACK) && defined(SA_SIGINFO) && !defined(__NetBSD__)
 #  define USE_SIGALTSTACK
 void *rb_allocate_sigaltstack(void);
@@ -654,9 +651,6 @@ typedef struct rb_vm_struct {
 #endif
 
     rb_serial_t fork_gen;
-    rb_nativethread_lock_t waitpid_lock;
-    struct ccan_list_head waiting_pids; /* PID > 0: <=> struct waitpid_state */
-    struct ccan_list_head waiting_grps; /* PID <= 0: <=> struct waitpid_state */
     struct ccan_list_head waiting_fds; /* <=> struct waiting_fd */
 
     /* set in single-threaded processes only: */
@@ -1764,9 +1758,7 @@ static inline void
 rb_vm_living_threads_init(rb_vm_t *vm)
 {
     ccan_list_head_init(&vm->waiting_fds);
-    ccan_list_head_init(&vm->waiting_pids);
     ccan_list_head_init(&vm->workqueue);
-    ccan_list_head_init(&vm->waiting_grps);
     ccan_list_head_init(&vm->ractor.set);
 }