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author"Steven J. Hill" <sjhill@realitydiluted.com>2005-05-07 02:04:55 +0000
committer"Steven J. Hill" <sjhill@realitydiluted.com>2005-05-07 02:04:55 +0000
commit0b3366f6a93ac0f7e2028745ea557c0acd8722c6 (patch)
tree2a87cb353c106eb55a44437d3b4d5e0d60af1d36 /libpthread/nptl/old_pthread_cond_signal.c
parent2274f6b2ddc7d7ea919a8fa1f9c54ef1920cb180 (diff)
Import in NPTL code from glibc. For further information please
consult the 'README.NPTL' file.
Diffstat (limited to 'libpthread/nptl/old_pthread_cond_signal.c')
-rw-r--r--libpthread/nptl/old_pthread_cond_signal.c58
1 files changed, 58 insertions, 0 deletions
diff --git a/libpthread/nptl/old_pthread_cond_signal.c b/libpthread/nptl/old_pthread_cond_signal.c
new file mode 100644
index 000000000..65beb0b9d
--- /dev/null
+++ b/libpthread/nptl/old_pthread_cond_signal.c
@@ -0,0 +1,58 @@
+/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+ 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 <errno.h>
+#include <stdlib.h>
+#include "pthreadP.h"
+#include <atomic.h>
+#include <shlib-compat.h>
+
+
+#if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_3_2)
+int
+__pthread_cond_signal_2_0 (cond)
+ pthread_cond_2_0_t *cond;
+{
+ if (cond->cond == NULL)
+ {
+ pthread_cond_t *newcond;
+
+#if LLL_MUTEX_LOCK_INITIALIZER == 0
+ newcond = (pthread_cond_t *) calloc (sizeof (pthread_cond_t), 1);
+ if (newcond == NULL)
+ return ENOMEM;
+#else
+ newcond = (pthread_cond_t *) malloc (sizeof (pthread_cond_t));
+ if (newcond == NULL)
+ return ENOMEM;
+
+ /* Initialize the condvar. */
+ (void) pthread_cond_init (newcond, NULL);
+#endif
+
+ if (atomic_compare_and_exchange_bool_acq (&cond->cond, newcond, NULL))
+ /* Somebody else just initialized the condvar. */
+ free (newcond);
+ }
+
+ return __pthread_cond_signal (cond->cond);
+}
+compat_symbol (libpthread, __pthread_cond_signal_2_0, pthread_cond_signal,
+ GLIBC_2_0);
+#endif