libpthread/nptl: core of the "Native Posix Threading Library" for uClibc

targetting arm,sh,i386,mips,sparc for now

Signed-off-by: Austin Foxley <austinf@cetoncorp.com>

1 files changed, 96 insertions, 0 deletions

diff --git a/libpthread/nptl/pthread_setspecific.c b/libpthread/nptl/pthread_setspecific.c
new file mode 100644
index 000000000..b6e66b5f2
--- /dev/null
+++ b/libpthread/nptl/pthread_setspecific.c
@@ -0,0 +1,96 @@
+/* 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"
+
+
+int
+__pthread_setspecific (key, value)
+     pthread_key_t key;
+     const void *value;
+{
+  struct pthread *self;
+  unsigned int idx1st;
+  unsigned int idx2nd;
+  struct pthread_key_data *level2;
+  unsigned int seq;
+
+  self = THREAD_SELF;
+
+  /* Special case access to the first 2nd-level block.  This is the
+     usual case.  */
+  if (__builtin_expect (key < PTHREAD_KEY_2NDLEVEL_SIZE, 1))
+    {
+      /* Verify the key is sane.  */
+      if (KEY_UNUSED ((seq = __pthread_keys[key].seq)))
+	/* Not valid.  */
+	return EINVAL;
+
+      level2 = &self->specific_1stblock[key];
+
+      /* Remember that we stored at least one set of data.  */
+      if (value != NULL)
+	THREAD_SETMEM (self, specific_used, true);
+    }
+  else
+    {
+      if (KEY_UNUSED ((seq = __pthread_keys[key].seq))
+	  || key >= PTHREAD_KEYS_MAX)
+	/* Not valid.  */
+	return EINVAL;
+
+      idx1st = key / PTHREAD_KEY_2NDLEVEL_SIZE;
+      idx2nd = key % PTHREAD_KEY_2NDLEVEL_SIZE;
+
+      /* This is the second level array.  Allocate it if necessary.  */
+      level2 = THREAD_GETMEM_NC (self, specific, idx1st);
+      if (level2 == NULL)
+	{
+	  if (value == NULL)
+	    /* We don't have to do anything.  The value would in any case
+	       be NULL.  We can save the memory allocation.  */
+	    return 0;
+
+	  level2
+	    = (struct pthread_key_data *) calloc (PTHREAD_KEY_2NDLEVEL_SIZE,
+						  sizeof (*level2));
+	  if (level2 == NULL)
+	    return ENOMEM;
+
+	  THREAD_SETMEM_NC (self, specific, idx1st, level2);
+	}
+
+      /* Pointer to the right array element.  */
+      level2 = &level2[idx2nd];
+
+      /* Remember that we stored at least one set of data.  */
+      THREAD_SETMEM (self, specific_used, true);
+    }
+
+  /* Store the data and the sequence number so that we can recognize
+     stale data.  */
+  level2->seq = seq;
+  level2->data = (void *) value;
+
+  return 0;
+}
+strong_alias (__pthread_setspecific, pthread_setspecific)
+strong_alias (__pthread_setspecific, __pthread_setspecific_internal)