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authorUlrich Drepper <drepper@redhat.com>2004-09-08 17:56:46 +0000
committerUlrich Drepper <drepper@redhat.com>2004-09-08 17:56:46 +0000
commit081fc592fa6e8cb8f262ad9dee917c658a415b42 (patch)
tree6e24039d16fad26e309bf756875960213b0ebaa6 /sysdeps
parentc207f23b0b6b2d215be65e670d453768ad304247 (diff)
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Update.
Jakub Jelinek <jakub@redhat.com> * nscd/Makefile (nscd-modules): Add nscd_setup_thread. * nscd/connections.c (nscd_run): Call setup_thread for maintenance threads. * nscd/nscd-client.h (struct database_pers_head): Add nscd_certainly_running field. * nscd/nscd.h: Declare setup_thread. * nscd/nscd_helper.c (__nscd_get_map_ref): Avoid the time test if nscd_certainly_running is nonzero. 2004-09-08 Ulrich Drepper <drepper@redhat.com>
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/generic/nscd_setup_thread.c28
-rw-r--r--sysdeps/unix/sysv/linux/nscd_setup_thread.c47
2 files changed, 75 insertions, 0 deletions
diff --git a/sysdeps/generic/nscd_setup_thread.c b/sysdeps/generic/nscd_setup_thread.c
new file mode 100644
index 0000000000..8ebc050b4a
--- /dev/null
+++ b/sysdeps/generic/nscd_setup_thread.c
@@ -0,0 +1,28 @@
+/* Setup of nscd worker threads. Stub verison.
+ Copyright (C) 2004 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2004.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library 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
+ 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. */
+
+#include <nscd.h>
+
+
+void
+setup_thread (struct database_dyn *db)
+{
+ /* Nothing. */
+}
diff --git a/sysdeps/unix/sysv/linux/nscd_setup_thread.c b/sysdeps/unix/sysv/linux/nscd_setup_thread.c
new file mode 100644
index 0000000000..3496f02dca
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nscd_setup_thread.c
@@ -0,0 +1,47 @@
+/* Setup of nscd worker threads. Linux verison.
+ Copyright (C) 2004 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2004.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library 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
+ 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. */
+
+#include <string.h>
+#include <unistd.h>
+#include <nscd.h>
+#include <sysdep.h>
+
+
+void
+setup_thread (struct database_dyn *db)
+{
+ /* Only supported when NPTL is used. */
+ char buf[100];
+ if (confstr (_CS_GNU_LIBPTHREAD_VERSION, buf, sizeof (buf)) >= sizeof (buf)
+ || strncmp (buf, "NPTL", 4) != 0)
+ return;
+
+ /* Do not try this at home, kids. We play with the SETTID address
+ even thought the process is multi-threaded. This can only work
+ since none of the threads ever terminates. */
+ INTERNAL_SYSCALL_DECL (err);
+ int r = INTERNAL_SYSCALL (set_tid_address, err, 1,
+ &db->head->nscd_certainly_running);
+ if (!INTERNAL_SYSCALL_ERROR_P (r, err))
+ /* We know the kernel can reset this field when nscd terminates.
+ So, set the field to a nonzero value which indicates that nscd
+ is certainly running and clients can skip the test. */
+ db->head->nscd_certainly_running = 1;
+}