std: Make os::set_exit_status work with newsched

Author: brson

src/libstd/os.rs

@@ -1134,8 +1134,15 @@ pub fn last_os_error() -> ~str {
  * ignored and the process exits with the default failure status
  */
 pub fn set_exit_status(code: int) {
-    unsafe {
-        rustrt::rust_set_exit_status(code as libc::intptr_t);
+    use rt;
+    use rt::OldTaskContext;
+
+    if rt::context() == OldTaskContext {
+        unsafe {
+            rustrt::rust_set_exit_status(code as libc::intptr_t);
+        }
+    } else {
+        rt::util::set_exit_status(code);
     }
 }
 

src/libstd/rt/mod.rs

@@ -260,7 +260,15 @@ pub fn run(main: ~fn()) -> int {
         }
 
         unsafe {
-            let exit_code = if exit_success { 0 } else { DEFAULT_ERROR_CODE };
+            let exit_code = if exit_success {
+                use rt::util;
+
+                // If we're exiting successfully, then return the global
+                // exit status, which can be set programmatically.
+                util::get_exit_status()
+            } else {
+                DEFAULT_ERROR_CODE
+            };
             (*exit_code_clone.get()).store(exit_code, SeqCst);
         }
     };

src/libstd/rt/util.rs

@@ -97,3 +97,25 @@ memory and partly incapable of presentation to others.",
 
     unsafe { libc::abort(); }
 }
+
+pub fn set_exit_status(code: int) {
+
+    unsafe {
+        return rust_set_exit_status_newrt(code as libc::uintptr_t);
+    }
+
+    extern {
+        fn rust_set_exit_status_newrt(code: libc::uintptr_t);
+    }
+}
+
+pub fn get_exit_status() -> int {
+
+    unsafe {
+        return rust_get_exit_status_newrt() as int;
+    }
+
+    extern {
+        fn rust_get_exit_status_newrt() -> libc::uintptr_t;
+    }
+}

src/rt/rust_builtin.cpp

@@ -960,6 +960,21 @@ 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;
+}
+
 //
 // Local Variables:
 // mode: C++

src/rt/rustrt.def.in

@@ -270,3 +270,5 @@ rust_get_global_args_ptr
 rust_current_boxed_region
 rust_take_global_args_lock
 rust_drop_global_args_lock
+rust_set_exit_status_newrt
+rust_get_exit_status_newrt