std: Remove at_exit API. Unused

Author: brson

src/libstd/unstable/at_exit.rs

@@ -16,8 +16,6 @@ use libc;
 use prelude::*;
 use task;
 
-pub mod at_exit;
-
 pub mod dynamic_lib;
 
 pub mod finally;

src/libstd/unstable/mod.rs

@@ -757,12 +757,6 @@ rust_raw_thread_join_delete(raw_thread *thread) {
     delete thread;
 }
 
-extern "C" void
-rust_register_exit_function(spawn_fn runner, fn_env_pair *f) {
-    rust_task *task = rust_get_current_task();
-    task->kernel->register_exit_function(runner, f);
-}
-
 #ifndef _WIN32
 #include <sys/types.h>
 #include <dirent.h>

src/rt/rust_builtin.cpp

@@ -31,8 +31,6 @@ rust_kernel::rust_kernel(rust_env *env) :
     sched_reaper(this),
     osmain_driver(NULL),
     non_weak_tasks(0),
-    at_exit_runner(NULL),
-    at_exit_started(false),
     env(env)
 {
     // Create the single threaded scheduler that will run on the platform's
@@ -310,54 +308,9 @@ rust_kernel::begin_shutdown() {
         }
     }
 
-    run_exit_functions();
     allow_scheduler_exit();
 }
 
-void
-rust_kernel::register_exit_function(spawn_fn runner, fn_env_pair *f) {
-    scoped_lock with(at_exit_lock);
-
-    assert(!at_exit_started && "registering at_exit function after exit");
-
-    if (at_exit_runner) {
-        // FIXME #2912 Would be very nice to assert this but we can't because
-        // of the way coretest works (the test case ends up using its own
-        // function)
-        //assert(runner == at_exit_runner
-        //       && "there can be only one at_exit_runner");
-    }
-
-    at_exit_runner = runner;
-    at_exit_fns.push_back(f);
-}
-
-void
-rust_kernel::run_exit_functions() {
-    rust_task *task;
-
-    {
-        scoped_lock with(at_exit_lock);
-
-        assert(!at_exit_started && "running exit functions twice?");
-
-        at_exit_started = true;
-
-        if (at_exit_runner == NULL) {
-            return;
-        }
-
-        rust_scheduler *sched = get_scheduler_by_id(main_sched_id());
-        assert(sched);
-        task = sched->create_task(NULL, "at_exit");
-
-        final_exit_fns.count = at_exit_fns.size();
-        final_exit_fns.start = at_exit_fns.data();
-    }
-
-    task->start(at_exit_runner, NULL, &final_exit_fns);
-}
-
 //
 // Local Variables:
 // mode: C++

src/rt/rust_kernel.cpp

@@ -63,13 +63,6 @@ typedef intptr_t rust_task_id;
 
 typedef std::map<rust_sched_id, rust_scheduler*> sched_map;
 
-// This is defined as a struct only because we need a single pointer to pass
-// to the Rust function that runs the at_exit functions
-struct exit_functions {
-    size_t count;
-    fn_env_pair **start;
-};
-
 class rust_kernel {
     rust_exchange_alloc exchange_alloc;
     rust_log _log;
@@ -114,14 +107,6 @@ class rust_kernel {
     void allow_scheduler_exit();
     void begin_shutdown();
 
-    lock_and_signal at_exit_lock;
-    spawn_fn at_exit_runner;
-    bool at_exit_started;
-    std::vector<fn_env_pair*> at_exit_fns;
-    exit_functions final_exit_fns;
-
-    void run_exit_functions();
-
 public:
     struct rust_env *env;
 
@@ -156,7 +141,6 @@ class rust_kernel {
     void inc_live_count();
     void dec_live_count();
 
-    void register_exit_function(spawn_fn runner, fn_env_pair *f);
 };
 
 template <typename T> struct kernel_owned {

src/rt/rust_kernel.h

@@ -214,7 +214,6 @@ linenoiseHistorySave
 linenoiseHistoryLoad
 rust_raw_thread_start
 rust_raw_thread_join_delete
-rust_register_exit_function
 rust_get_rt_tls_key
 swap_registers
 rust_readdir