diff options
Diffstat (limited to 'libpthread/linuxthreads.old_db/td_thr_tsd.c')
-rw-r--r-- | libpthread/linuxthreads.old_db/td_thr_tsd.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/libpthread/linuxthreads.old_db/td_thr_tsd.c b/libpthread/linuxthreads.old_db/td_thr_tsd.c new file mode 100644 index 000000000..f18832f46 --- /dev/null +++ b/libpthread/linuxthreads.old_db/td_thr_tsd.c @@ -0,0 +1,80 @@ +/* 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, see + <http://www.gnu.org/licenses/>. */ + +#include "thread_dbP.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; +} |