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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_db/td_thr_tsd.c
parent2274f6b2ddc7d7ea919a8fa1f9c54ef1920cb180 (diff)
Import in NPTL code from glibc. For further information please
consult the 'README.NPTL' file.
Diffstat (limited to 'libpthread/nptl_db/td_thr_tsd.c')
-rw-r--r--libpthread/nptl_db/td_thr_tsd.c96
1 files changed, 96 insertions, 0 deletions
diff --git a/libpthread/nptl_db/td_thr_tsd.c b/libpthread/nptl_db/td_thr_tsd.c
new file mode 100644
index 000000000..08f617b7d
--- /dev/null
+++ b/libpthread/nptl_db/td_thr_tsd.c
@@ -0,0 +1,96 @@
+/* Get a thread-specific data pointer for a thread.
+ Copyright (C) 1999,2001,2002,2003 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@redhat.com>, 1999.
+
+ 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 "thread_dbP.h"
+
+
+td_err_e
+td_thr_tsd (const td_thrhandle_t *th, const thread_key_t tk, void **data)
+{
+ td_err_e err;
+ psaddr_t tk_seq, level1, level2, seq, value;
+ void *copy;
+ uint32_t pthread_key_2ndlevel_size, idx1st, idx2nd;
+
+ LOG ("td_thr_tsd");
+
+ /* Get the key entry. */
+ err = DB_GET_VALUE (tk_seq, th->th_ta_p, __pthread_keys, tk);
+ if (err == TD_NOAPLIC)
+ return TD_BADKEY;
+ if (err != TD_OK)
+ return err;
+
+ /* Fail if this key is not at all used. */
+ if (((uintptr_t) tk_seq & 1) == 0)
+ return TD_BADKEY;
+
+ /* This makes sure we have the size information on hand. */
+ err = DB_GET_FIELD_ADDRESS (level2, th->th_ta_p, 0, pthread_key_data_level2,
+ data, 1);
+ if (err != TD_OK)
+ return err;
+
+ /* Compute the indeces. */
+ pthread_key_2ndlevel_size
+ = DB_DESC_NELEM (th->th_ta_p->ta_field_pthread_key_data_level2_data);
+ idx1st = tk / pthread_key_2ndlevel_size;
+ idx2nd = tk % pthread_key_2ndlevel_size;
+
+ /* Now fetch the first level pointer. */
+ err = DB_GET_FIELD (level1, th->th_ta_p, th->th_unique, pthread,
+ specific, idx1st);
+ if (err == TD_NOAPLIC)
+ return TD_DBERR;
+ if (err != TD_OK)
+ return err;
+
+ /* Check the pointer to the second level array. */
+ if (level1 == 0)
+ return TD_NOTSD;
+
+ /* Locate the element within the second level array. */
+ err = DB_GET_FIELD_ADDRESS (level2, th->th_ta_p,
+ level1, pthread_key_data_level2, data, idx2nd);
+ if (err == TD_NOAPLIC)
+ return TD_DBERR;
+ if (err != TD_OK)
+ return err;
+
+ /* Now copy in that whole structure. */
+ err = DB_GET_STRUCT (copy, th->th_ta_p, level2, pthread_key_data);
+ if (err != TD_OK)
+ return err;
+
+ /* Check whether the data is valid. */
+ err = DB_GET_FIELD_LOCAL (seq, th->th_ta_p, copy, pthread_key_data, seq, 0);
+ if (err != TD_OK)
+ return err;
+ if (seq != tk_seq)
+ return TD_NOTSD;
+
+ /* Finally, fetch the value. */
+ err = DB_GET_FIELD_LOCAL (value, th->th_ta_p, copy, pthread_key_data,
+ data, 0);
+ if (err == TD_OK)
+ *data = value;
+
+ return err;
+}