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authorUlrich Drepper <drepper@redhat.com>2004-12-22 20:10:10 +0000
committerUlrich Drepper <drepper@redhat.com>2004-12-22 20:10:10 +0000
commita334319f6530564d22e775935d9c91663623a1b4 (patch)
treeb5877475619e4c938e98757d518bb1e9cbead751 /linuxthreads_db/td_ta_map_id2thr.c
parent0ecb606cb6cf65de1d9fc8a919bceb4be476c602 (diff)
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(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.
Diffstat (limited to 'linuxthreads_db/td_ta_map_id2thr.c')
-rw-r--r--linuxthreads_db/td_ta_map_id2thr.c79
1 files changed, 79 insertions, 0 deletions
diff --git a/linuxthreads_db/td_ta_map_id2thr.c b/linuxthreads_db/td_ta_map_id2thr.c
new file mode 100644
index 0000000000..ddeb2d3c4a
--- /dev/null
+++ b/linuxthreads_db/td_ta_map_id2thr.c
@@ -0,0 +1,79 @@
+/* Map thread ID to thread handle.
+ 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_ta_map_id2thr (const td_thragent_t *ta, pthread_t pt, td_thrhandle_t *th)
+{
+ struct pthread_handle_struct phc;
+ struct _pthread_descr_struct pds;
+ int pthread_threads_max;
+
+ LOG ("td_ta_map_id2thr");
+
+ /* Test whether the TA parameter is ok. */
+ if (! ta_ok (ta))
+ return TD_BADTA;
+
+ /* Make the following expression a bit smaller. */
+ pthread_threads_max = ta->pthread_threads_max;
+
+ /* We can compute the entry in the handle array we want. */
+ if (ps_pdread (ta->ph, ta->handles + pt % pthread_threads_max, &phc,
+ sizeof (struct pthread_handle_struct)) != PS_OK)
+ return TD_ERR; /* XXX Other error value? */
+
+ /* Test whether this entry is in use. */
+ if (phc.h_descr == NULL)
+ {
+ if (pt % pthread_threads_max == 0)
+ {
+ /* The initial thread always exists but the thread library
+ might not yet be initialized. */
+ th->th_ta_p = (td_thragent_t *) ta;
+ th->th_unique = NULL;
+
+ return TD_OK;
+ }
+
+ return TD_BADTH;
+ }
+
+ /* Next test: get the descriptor to see whether this is not an old
+ thread handle. */
+ if (ps_pdread (ta->ph, phc.h_descr, &pds,
+ sizeof (struct _pthread_descr_struct)) != PS_OK)
+ return TD_ERR; /* XXX Other error value? */
+
+ if (pds.p_tid != pt)
+ return TD_BADTH;
+
+ if (pds.p_terminated != 0)
+ return TD_NOTHR;
+
+ /* Create the `td_thrhandle_t' object. */
+ th->th_ta_p = (td_thragent_t *) ta;
+ th->th_unique = phc.h_descr;
+
+ return TD_OK;
+}