Cleanup sigpause implementation

This patch simplify sigpause by remobing the single thread optimization
since it will be handled already by the __sigsuspend call.

Checked on x86_64-linux-gnu.

	* sysdeps/posix/sigpause.c (do_sigpause): Remove.
	(__sigpause): Rely on __sigsuspend to implement single thread
	optimization.  Add LIBC_CANCEL_HANDLED for cancellation marking.

Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Reviewed-by: Zack Weinberg <zackw@panix.com>

1 files changed, 6 insertions, 20 deletions

diff --git a/sysdeps/posix/sigpause.c b/sysdeps/posix/sigpause.c
index 9038ed368d..a61e056d24 100644
--- a/sysdeps/posix/sigpause.c
+++ b/sysdeps/posix/sigpause.c
@@ -19,15 +19,13 @@
 #include <errno.h>
 #include <signal.h>
 #include <stddef.h>		/* For NULL.  */
-#include <sysdep-cancel.h>
 #undef sigpause
 
 #include <sigset-cvt-mask.h>
+#include <sysdep-cancel.h>
 
-/* Set the mask of blocked signals to MASK,
-   wait for a signal to arrive, and then restore the mask.  */
-static int
-do_sigpause (int sig_or_mask, int is_sig)
+int
+__sigpause (int sig_or_mask, int is_sig)
 {
   sigset_t set;
 
@@ -46,21 +44,6 @@ do_sigpause (int sig_or_mask, int is_sig)
      to do anything here.  */
   return __sigsuspend (&set);
 }
-
-int
-__sigpause (int sig_or_mask, int is_sig)
-{
-  if (SINGLE_THREAD_P)
-    return do_sigpause (sig_or_mask, is_sig);
-
-  int oldtype = LIBC_CANCEL_ASYNC ();
-
-  int result = do_sigpause (sig_or_mask, is_sig);
-
-  LIBC_CANCEL_RESET (oldtype);
-
-  return result;
-}
 libc_hidden_def (__sigpause)
 
 /* We have to provide a default version of this function since the
@@ -87,3 +70,6 @@ __xpg_sigpause (int sig)
   return __sigpause (sig, 1);
 }
 strong_alias (__xpg_sigpause, __libc___xpg_sigpause)
+
+/* __sigsuspend handles cancellation.  */
+LIBC_CANCEL_HANDLED ();