rt: Remove exit_status helpers

Author: brson

src/libstd/rt/util.rs

@@ -14,6 +14,7 @@ use libc;
 use option::{Some, None};
 use os;
 use str::StrSlice;
+use unstable::atomics::{AtomicInt, INIT_ATOMIC_INT, SeqCst};
 
 #[cfg(target_os="macos")]
 use unstable::running_on_valgrind;
@@ -129,24 +130,12 @@ memory and partly incapable of presentation to others.",
     }
 }
 
-pub fn set_exit_status(code: int) {
-    #[fixed_stack_segment]; #[inline(never)];
-    unsafe {
-        return rust_set_exit_status_newrt(code as libc::uintptr_t);
-    }
+static mut EXIT_STATUS: AtomicInt = INIT_ATOMIC_INT;
 
-    extern {
-        fn rust_set_exit_status_newrt(code: libc::uintptr_t);
-    }
+pub fn set_exit_status(code: int) {
+    unsafe { EXIT_STATUS.store(code, SeqCst) }
 }
 
 pub fn get_exit_status() -> int {
-    #[fixed_stack_segment]; #[inline(never)];
-    unsafe {
-        return rust_get_exit_status_newrt() as int;
-    }
-
-    extern {
-        fn rust_get_exit_status_newrt() -> libc::uintptr_t;
-    }
+    unsafe { EXIT_STATUS.load(SeqCst) }
 }

src/rt/rust_builtin.cpp

@@ -653,21 +653,6 @@ rust_get_global_args_ptr() {
     return &global_args_ptr;
 }
 
-static lock_and_signal exit_status_lock;
-static uintptr_t exit_status = 0;
-
-extern "C" CDECL void
-rust_set_exit_status_newrt(uintptr_t code) {
-    scoped_lock with(exit_status_lock);
-    exit_status = code;
-}
-
-extern "C" CDECL uintptr_t
-rust_get_exit_status_newrt() {
-    scoped_lock with(exit_status_lock);
-    return exit_status;
-}
-
 static lock_and_signal change_dir_lock;
 
 extern "C" CDECL void

src/rt/rustrt.def.in

@@ -191,8 +191,6 @@ rust_get_num_cpus
 rust_get_global_args_ptr
 rust_take_global_args_lock
 rust_drop_global_args_lock
-rust_set_exit_status_newrt
-rust_get_exit_status_newrt
 rust_take_change_dir_lock
 rust_drop_change_dir_lock
 rust_get_test_int