Refactor internal-signals.h

The main drive is to optimize the internal usage and required size
when sigset_t is embedded in other data structures.  On Linux, the
current supported signal set requires up to 8 bytes (16 on mips),
was lower than the user defined sigset_t (128 bytes).

A new internal type internal_sigset_t is added, along with the
functions to operate on it similar to the ones for sigset_t.  The
internal-signals.h is also refactored to remove unused functions

Besides small stack usage on some functions (posix_spawn, abort)
it lower the struct pthread by about 120 bytes (112 on mips).

Checked on x86_64-linux-gnu.

Reviewed-by: Arjun Shankar <arjun@redhat.com>

1 files changed, 5 insertions, 5 deletions

diff --git a/nptl/pthread_kill.c b/nptl/pthread_kill.c
index 8015e10b70..178d38d3bd 100644
--- a/nptl/pthread_kill.c
+++ b/nptl/pthread_kill.c
@@ -45,8 +45,8 @@ __pthread_kill_implementation (pthread_t threadid, int signo, int no_tid)
     }
 
   /* Block all signals, as required by pd->exit_lock.  */
-  sigset_t old_mask;
-  __libc_signal_block_all (&old_mask);
+  internal_sigset_t old_mask;
+  internal_signal_block_all (&old_mask);
   __libc_lock_lock (pd->exit_lock);
 
   int ret;
@@ -64,7 +64,7 @@ __pthread_kill_implementation (pthread_t threadid, int signo, int no_tid)
     }
 
   __libc_lock_unlock (pd->exit_lock);
-  __libc_signal_restore_set (&old_mask);
+  internal_signal_restore_set (&old_mask);
 
   return ret;
 }
@@ -83,7 +83,7 @@ __pthread_kill (pthread_t threadid, int signo)
 {
   /* Disallow sending the signal we use for cancellation, timers,
      for the setxid implementation.  */
-  if (__is_internal_signal (signo))
+  if (is_internal_signal (signo))
     return EINVAL;
 
   return __pthread_kill_internal (threadid, signo);
@@ -102,7 +102,7 @@ int
 attribute_compat_text_section
 __pthread_kill_esrch (pthread_t threadid, int signo)
 {
-  if (__is_internal_signal (signo))
+  if (is_internal_signal (signo))
     return EINVAL;
 
   return __pthread_kill_implementation (threadid, signo, ESRCH);