-/* Handle real-time signal allocation.
- Copyright (C) 1997,98,99,2002 Free Software Foundation, Inc.
+/* Handle real-time signal allocation. Generic version.
+ Copyright (C) 1997-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
#include <signal.h>
+/* Another sysdeps file can #define this and then #include this file. */
+#ifndef RESERVED_SIGRT
+# define RESERVED_SIGRT 0
+#endif
+
/* In these variables we keep track of the used variables. If the
platform does not support any real-time signals we will define the
values to some unreasonable value which will signal failing of all
the functions below. */
-#ifndef __SIGRTMIN
-static int current_rtmin = -1;
-static int current_rtmax = -1;
-#else
-static int current_rtmin;
-static int current_rtmax;
-
-static int initialized;
-
-#include "testrtsig.h"
-
-static void
-init (void)
-{
- if (!kernel_has_rtsig ())
- {
- current_rtmin = -1;
- current_rtmax = -1;
- }
- else
- {
- current_rtmin = __SIGRTMIN;
- current_rtmax = __SIGRTMAX;
- }
- initialized = 1;
-}
+#ifdef __SIGRTMIN
+static int current_rtmin = __SIGRTMIN + RESERVED_SIGRT;
+static int current_rtmax = __SIGRTMAX;
#endif
/* Return number of available real-time signal with highest priority. */
__libc_current_sigrtmin (void)
{
#ifdef __SIGRTMIN
- if (!initialized)
- init ();
-#endif
return current_rtmin;
+#else
+ return -1;
+#endif
}
+libc_hidden_def (__libc_current_sigrtmin)
+strong_alias (__libc_current_sigrtmin, __libc_current_sigrtmin_private)
/* Return number of available real-time signal with lowest priority. */
int
__libc_current_sigrtmax (void)
{
#ifdef __SIGRTMIN
- if (!initialized)
- init ();
-#endif
return current_rtmax;
+#else
+ return -1;
+#endif
}
+libc_hidden_def (__libc_current_sigrtmax)
+strong_alias (__libc_current_sigrtmax, __libc_current_sigrtmax_private)
/* Allocate real-time signal with highest/lowest available
priority. Please note that we don't use a lock since we assume
#ifndef __SIGRTMIN
return -1;
#else
- if (!initialized)
- init ();
if (current_rtmin == -1 || current_rtmin > current_rtmax)
- /* We don't have anymore signal available. */
+ /* We don't have any more signals available. */
return -1;
return high ? current_rtmin++ : current_rtmax--;
#endif
}
+strong_alias (__libc_allocate_rtsig, __libc_allocate_rtsig_private)