* lib/sigprocmask.c, m4/signalblocking.m4: Remove.

These files have been unused since the 2012-06-22 patch that
introduced high-resolution time stamps.

1 files changed, 0 insertions, 349 deletions

diff --git a/lib/sigprocmask.c b/lib/sigprocmask.c
deleted file mode 100644
index be53d540012..00000000000
--- a/lib/sigprocmask.c
+++ /dev/null
@@ -1,349 +0,0 @@
-/* POSIX compatible signal blocking.
-   Copyright (C) 2006-2012 Free Software Foundation, Inc.
-   Written by Bruno Haible <bruno@clisp.org>, 2006.
-
-   This program is free software: you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 3 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
-
-#include <config.h>
-
-/* Specification.  */
-#include <signal.h>
-
-#include <errno.h>
-#include <stdint.h>
-#include <stdlib.h>
-
-#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
-# include "msvc-inval.h"
-#endif
-
-/* We assume that a platform without POSIX signal blocking functions
-   also does not have the POSIX sigaction() function, only the
-   signal() function.  We also assume signal() has SysV semantics,
-   where any handler is uninstalled prior to being invoked.  This is
-   true for native Windows platforms.  */
-
-/* We use raw signal(), but also provide a wrapper rpl_signal() so
-   that applications can query or change a blocked signal.  */
-#undef signal
-
-/* Provide invalid signal numbers as fallbacks if the uncatchable
-   signals are not defined.  */
-#ifndef SIGKILL
-# define SIGKILL (-1)
-#endif
-#ifndef SIGSTOP
-# define SIGSTOP (-1)
-#endif
-
-/* On native Windows, as of 2008, the signal SIGABRT_COMPAT is an alias
-   for the signal SIGABRT.  Only one signal handler is stored for both
-   SIGABRT and SIGABRT_COMPAT.  SIGABRT_COMPAT is not a signal of its own.  */
-#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
-# undef SIGABRT_COMPAT
-# define SIGABRT_COMPAT 6
-#endif
-#ifdef SIGABRT_COMPAT
-# define SIGABRT_COMPAT_MASK (1U << SIGABRT_COMPAT)
-#else
-# define SIGABRT_COMPAT_MASK 0
-#endif
-
-typedef void (*handler_t) (int);
-
-#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
-static inline handler_t
-signal_nothrow (int sig, handler_t handler)
-{
-  handler_t result;
-
-  TRY_MSVC_INVAL
-    {
-      result = signal (sig, handler);
-    }
-  CATCH_MSVC_INVAL
-    {
-      result = SIG_ERR;
-      errno = EINVAL;
-    }
-  DONE_MSVC_INVAL;
-
-  return result;
-}
-# define signal signal_nothrow
-#endif
-
-/* Handling of gnulib defined signals.  */
-
-#if GNULIB_defined_SIGPIPE
-static handler_t SIGPIPE_handler = SIG_DFL;
-#endif
-
-#if GNULIB_defined_SIGPIPE
-static handler_t
-ext_signal (int sig, handler_t handler)
-{
-  switch (sig)
-    {
-    case SIGPIPE:
-      {
-        handler_t old_handler = SIGPIPE_handler;
-        SIGPIPE_handler = handler;
-        return old_handler;
-      }
-    default: /* System defined signal */
-      return signal (sig, handler);
-    }
-}
-# undef signal
-# define signal ext_signal
-#endif
-
-int
-sigismember (const sigset_t *set, int sig)
-{
-  if (sig >= 0 && sig < NSIG)
-    {
-      #ifdef SIGABRT_COMPAT
-      if (sig == SIGABRT_COMPAT)
-        sig = SIGABRT;
-      #endif
-
-      return (*set >> sig) & 1;
-    }
-  else
-    return 0;
-}
-
-int
-sigemptyset (sigset_t *set)
-{
-  *set = 0;
-  return 0;
-}
-
-int
-sigaddset (sigset_t *set, int sig)
-{
-  if (sig >= 0 && sig < NSIG)
-    {
-      #ifdef SIGABRT_COMPAT
-      if (sig == SIGABRT_COMPAT)
-        sig = SIGABRT;
-      #endif
-
-      *set |= 1U << sig;
-      return 0;
-    }
-  else
-    {
-      errno = EINVAL;
-      return -1;
-    }
-}
-
-int
-sigdelset (sigset_t *set, int sig)
-{
-  if (sig >= 0 && sig < NSIG)
-    {
-      #ifdef SIGABRT_COMPAT
-      if (sig == SIGABRT_COMPAT)
-        sig = SIGABRT;
-      #endif
-
-      *set &= ~(1U << sig);
-      return 0;
-    }
-  else
-    {
-      errno = EINVAL;
-      return -1;
-    }
-}
-
-
-int
-sigfillset (sigset_t *set)
-{
-  *set = ((2U << (NSIG - 1)) - 1) & ~ SIGABRT_COMPAT_MASK;
-  return 0;
-}
-
-/* Set of currently blocked signals.  */
-static volatile sigset_t blocked_set /* = 0 */;
-
-/* Set of currently blocked and pending signals.  */
-static volatile sig_atomic_t pending_array[NSIG] /* = { 0 } */;
-
-/* Signal handler that is installed for blocked signals.  */
-static void
-blocked_handler (int sig)
-{
-  /* Reinstall the handler, in case the signal occurs multiple times
-     while blocked.  There is an inherent race where an asynchronous
-     signal in between when the kernel uninstalled the handler and
-     when we reinstall it will trigger the default handler; oh
-     well.  */
-  signal (sig, blocked_handler);
-  if (sig >= 0 && sig < NSIG)
-    pending_array[sig] = 1;
-}
-
-int
-sigpending (sigset_t *set)
-{
-  sigset_t pending = 0;
-  int sig;
-
-  for (sig = 0; sig < NSIG; sig++)
-    if (pending_array[sig])
-      pending |= 1U << sig;
-  *set = pending;
-  return 0;
-}
-
-/* The previous signal handlers.
-   Only the array elements corresponding to blocked signals are relevant.  */
-static volatile handler_t old_handlers[NSIG];
-
-int
-sigprocmask (int operation, const sigset_t *set, sigset_t *old_set)
-{
-  if (old_set != NULL)
-    *old_set = blocked_set;
-
-  if (set != NULL)
-    {
-      sigset_t new_blocked_set;
-      sigset_t to_unblock;
-      sigset_t to_block;
-
-      switch (operation)
-        {
-        case SIG_BLOCK:
-          new_blocked_set = blocked_set | *set;
-          break;
-        case SIG_SETMASK:
-          new_blocked_set = *set;
-          break;
-        case SIG_UNBLOCK:
-          new_blocked_set = blocked_set & ~*set;
-          break;
-        default:
-          errno = EINVAL;
-          return -1;
-        }
-      to_unblock = blocked_set & ~new_blocked_set;
-      to_block = new_blocked_set & ~blocked_set;
-
-      if (to_block != 0)
-        {
-          int sig;
-
-          for (sig = 0; sig < NSIG; sig++)
-            if ((to_block >> sig) & 1)
-              {
-                pending_array[sig] = 0;
-                if ((old_handlers[sig] = signal (sig, blocked_handler)) != SIG_ERR)
-                  blocked_set |= 1U << sig;
-              }
-        }
-
-      if (to_unblock != 0)
-        {
-          sig_atomic_t received[NSIG];
-          int sig;
-
-          for (sig = 0; sig < NSIG; sig++)
-            if ((to_unblock >> sig) & 1)
-              {
-                if (signal (sig, old_handlers[sig]) != blocked_handler)
-                  /* The application changed a signal handler while the signal
-                     was blocked, bypassing our rpl_signal replacement.
-                     We don't support this.  */
-                  abort ();
-                received[sig] = pending_array[sig];
-                blocked_set &= ~(1U << sig);
-                pending_array[sig] = 0;
-              }
-            else
-              received[sig] = 0;
-
-          for (sig = 0; sig < NSIG; sig++)
-            if (received[sig])
-              raise (sig);
-        }
-    }
-  return 0;
-}
-
-/* Install the handler FUNC for signal SIG, and return the previous
-   handler.  */
-handler_t
-rpl_signal (int sig, handler_t handler)
-{
-  /* We must provide a wrapper, so that a user can query what handler
-     they installed even if that signal is currently blocked.  */
-  if (sig >= 0 && sig < NSIG && sig != SIGKILL && sig != SIGSTOP
-      && handler != SIG_ERR)
-    {
-      #ifdef SIGABRT_COMPAT
-      if (sig == SIGABRT_COMPAT)
-        sig = SIGABRT;
-      #endif
-
-      if (blocked_set & (1U << sig))
-        {
-          /* POSIX states that sigprocmask and signal are both
-             async-signal-safe.  This is not true of our
-             implementation - there is a slight data race where an
-             asynchronous interrupt on signal A can occur after we
-             install blocked_handler but before we have updated
-             old_handlers for signal B, such that handler A can see
-             stale information if it calls signal(B).  Oh well -
-             signal handlers really shouldn't try to manipulate the
-             installed handlers of unrelated signals.  */
-          handler_t result = old_handlers[sig];
-          old_handlers[sig] = handler;
-          return result;
-        }
-      else
-        return signal (sig, handler);
-    }
-  else
-    {
-      errno = EINVAL;
-      return SIG_ERR;
-    }
-}
-
-#if GNULIB_defined_SIGPIPE
-/* Raise the signal SIGPIPE.  */
-int
-_gl_raise_SIGPIPE (void)
-{
-  if (blocked_set & (1U << SIGPIPE))
-    pending_array[SIGPIPE] = 1;
-  else
-    {
-      handler_t handler = SIGPIPE_handler;
-      if (handler == SIG_DFL)
-        exit (128 + SIGPIPE);
-      else if (handler != SIG_IGN)
-        (*handler) (SIGPIPE);
-    }
-  return 0;
-}
-#endif