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Diffstat (limited to 'libpthread/linuxthreads_db/td_thr_tsd.c')
-rw-r--r--libpthread/linuxthreads_db/td_thr_tsd.c82
1 files changed, 82 insertions, 0 deletions
diff --git a/libpthread/linuxthreads_db/td_thr_tsd.c b/libpthread/linuxthreads_db/td_thr_tsd.c
new file mode 100644
index 000000000..978dc5e52
--- /dev/null
+++ b/libpthread/linuxthreads_db/td_thr_tsd.c
@@ -0,0 +1,82 @@
+/* Get a thread-specific data pointer for a thread.
+ Copyright (C) 1999, 2001, 2002 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@cygnus.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"
+#include <linuxthreads/internals.h>
+
+
+td_err_e
+td_thr_tsd (const td_thrhandle_t *th, const thread_key_t tk, void **data)
+{
+ struct _pthread_descr_struct pds;
+ struct pthread_key_struct *keys = th->th_ta_p->keys;
+ struct pthread_key_struct key;
+ int pthread_keys_max = th->th_ta_p->pthread_keys_max;
+ int pthread_key_2ndlevel_size = th->th_ta_p->pthread_key_2ndlevel_size;
+ unsigned int idx1st;
+ unsigned int idx2nd;
+ void *p;
+
+ LOG ("td_thr_tsd");
+
+ /* If there is no thread descriptor there cannot be any thread
+ specific data. */
+ if (th->th_unique == NULL)
+ return TD_BADKEY;
+
+ /* Get the thread descriptor. */
+ if (ps_pdread (th->th_ta_p->ph, th->th_unique, &pds,
+ sizeof (struct _pthread_descr_struct)) != PS_OK)
+ return TD_ERR; /* XXX Other error value? */
+
+ /* Check correct value of key. */
+ if (tk >= pthread_keys_max)
+ return TD_BADKEY;
+
+ /* Get the key entry. */
+ if (ps_pdread (th->th_ta_p->ph, &keys[tk], &key,
+ sizeof (struct pthread_key_struct)) != PS_OK)
+ return TD_ERR; /* XXX Other error value? */
+
+ /* Fail if this key is not at all used. */
+ if (! key.in_use)
+ return TD_BADKEY;
+
+ /* Compute the indeces. */
+ idx1st = tk / pthread_key_2ndlevel_size;
+ idx2nd = tk % pthread_key_2ndlevel_size;
+
+ /* Check the pointer to the second level array. */
+ if (pds.p_specific[idx1st] == NULL)
+ return TD_NOTSD;
+
+ /* Now get the real key.
+ XXX I don't know whether it's correct but there is currently no
+ easy way to determine whether a key was never set or the value
+ is NULL. We return an error whenever the value is NULL. */
+ if (ps_pdread (th->th_ta_p->ph, &pds.p_specific[idx1st][idx2nd], &p,
+ sizeof (void *)) != PS_OK)
+ return TD_ERR;
+
+ if (p != NULL)
+ *data = p;
+
+ return p != NULL ? TD_OK : TD_NOTSD;
+}