posix: Consolidate register-atfork

Both htl and nptl uses a different data structure to implement atfork
handlers.  The nptl one was refactored by 27761a1042d to use a dynarray
which simplifies the code.

This patch moves the nptl one to be the generic implementation and
replace Hurd linked one.  Different than previous NPTL, Hurd also uses
a global lock, so performance should be similar.

Checked on x86_64-linux-gnu, i686-linux-gnu, and with a build for
i686-gnu.

1 files changed, 4 insertions, 11 deletions

diff --git a/sysdeps/mach/hurd/fork.c b/sysdeps/mach/hurd/fork.c
index 2b39f4e8b5..1c5299e686 100644
--- a/sysdeps/mach/hurd/fork.c
+++ b/sysdeps/mach/hurd/fork.c
@@ -30,6 +30,7 @@
 #include <malloc/malloc-internal.h>
 #include <nss/nss_database.h>
 #include <unwind-link.h>
+#include <register-atfork.h>
 
 #undef __fork
 
@@ -37,12 +38,6 @@
 /* Things that want to be locked while forking.  */
 symbol_set_declare (_hurd_fork_locks)
 
-
-/* Application callbacks registered through pthread_atfork.  */
-DEFINE_HOOK (_hurd_atfork_prepare_hook, (void));
-DEFINE_HOOK (_hurd_atfork_child_hook, (void));
-DEFINE_HOOK (_hurd_atfork_parent_hook, (void));
-
 /* Things that want to be called before we fork, to prepare the parent for
    task_create, when the new child task will inherit our address space.  */
 DEFINE_HOOK (_hurd_fork_prepare_hook, (void));
@@ -72,7 +67,7 @@ __fork (void)
   struct hurd_sigstate *volatile ss;
   struct nss_database_data nss_database_data;
 
-  RUN_HOOK (_hurd_atfork_prepare_hook, ());
+  __run_fork_handlers (atfork_run_prepare, true);
 
   ss = _hurd_self_sigstate ();
   __spin_lock (&ss->critical_section_lock);
@@ -726,10 +721,8 @@ __fork (void)
 
   if (!err)
     {
-      if (pid != 0)
-	RUN_HOOK (_hurd_atfork_parent_hook, ());
-      else
-	RUN_HOOK (_hurd_atfork_child_hook, ());
+      __run_fork_handlers (pid == 0 ? atfork_run_child : atfork_run_parent,
+			   true);
     }
 
   return err ? __hurd_fail (err) : pid;