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, 1 insertions, 41 deletions

diff --git a/sysdeps/nptl/fork.h b/sysdeps/nptl/fork.h
index 25002287b1..5246754290 100644
--- a/sysdeps/nptl/fork.h
+++ b/sysdeps/nptl/fork.h
@@ -17,50 +17,10 @@
    <https://www.gnu.org/licenses/>.  */
 
 #include <lowlevellock.h>
+#include <register-atfork.h>
 
 /* The fork generation counter, defined in libpthread.  */
 extern unsigned long int __fork_generation attribute_hidden;
 
 /* Pointer to the fork generation counter in the thread library.  */
 extern unsigned long int *__fork_generation_pointer attribute_hidden;
-
-/* Elements of the fork handler lists.  */
-struct fork_handler
-{
-  void (*prepare_handler) (void);
-  void (*parent_handler) (void);
-  void (*child_handler) (void);
-  void *dso_handle;
-};
-
-/* Function to call to unregister fork handlers.  */
-extern void __unregister_atfork (void *dso_handle) attribute_hidden;
-#define UNREGISTER_ATFORK(dso_handle) __unregister_atfork (dso_handle)
-
-enum __run_fork_handler_type
-{
-  atfork_run_prepare,
-  atfork_run_child,
-  atfork_run_parent
-};
-
-/* Run the atfork handlers and lock/unlock the internal lock depending
-   of the WHO argument:
-
-   - atfork_run_prepare: run all the PREPARE_HANDLER in reverse order of
-			 insertion and locks the internal lock.
-   - atfork_run_child: run all the CHILD_HANDLER and unlocks the internal
-		       lock.
-   - atfork_run_parent: run all the PARENT_HANDLER and unlocks the internal
-			lock.
-
-   Perform locking only if DO_LOCKING.  */
-extern void __run_fork_handlers (enum __run_fork_handler_type who,
-				 _Bool do_locking) attribute_hidden;
-
-/* C library side function to register new fork handlers.  */
-extern int __register_atfork (void (*__prepare) (void),
-			      void (*__parent) (void),
-			      void (*__child) (void),
-			      void *dso_handle);
-libc_hidden_proto (__register_atfork)