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authorRoland McGrath <roland@hack.frob.com>2015-01-08 15:31:15 -0800
committerRoland McGrath <roland@hack.frob.com>2015-01-08 15:31:15 -0800
commit08734ccd983c4d048ef812d181d5ea9a8860ae45 (patch)
treeb44cd139df29f7dfada39a2568379deee1959ee9 /signal
parent24abc200400002f24a12a8858eae1183128db661 (diff)
downloadtermbaud-08734ccd983c4d048ef812d181d5ea9a8860ae45.tar.gz
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Clean up allocrtsig code.
Diffstat (limited to 'signal')
-rw-r--r--signal/allocrtsig.c55
1 files changed, 19 insertions, 36 deletions
diff --git a/signal/allocrtsig.c b/signal/allocrtsig.c
index c9af846cf68..0dd003110ff 100644
--- a/signal/allocrtsig.c
+++ b/signal/allocrtsig.c
@@ -1,4 +1,4 @@
-/* Handle real-time signal allocation.
+/* Handle real-time signal allocation. Generic version.
Copyright (C) 1997-2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
@@ -19,36 +19,18 @@
#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. */
@@ -56,24 +38,26 @@ int
__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
@@ -84,12 +68,11 @@ __libc_allocate_rtsig (int high)
#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)