2.3.5-5
[glibc.git] / nptl_db / td_ta_clear_event.c
blob7a2850c4ea953fb75d58da92e1b79159df3b4162
1 /* Globally disable events.
2 Copyright (C) 1999, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@redhat.com>, 1999.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 02111-1307 USA. */
21 #include "thread_dbP.h"
24 td_err_e
25 td_ta_clear_event (ta_arg, event)
26 const td_thragent_t *ta_arg;
27 td_thr_events_t *event;
29 td_thragent_t *const ta = (td_thragent_t *) ta_arg;
30 td_err_e err;
31 psaddr_t eventmask = 0;
32 void *copy = NULL;
34 LOG ("td_ta_clear_event");
36 /* Test whether the TA parameter is ok. */
37 if (! ta_ok (ta))
38 return TD_BADTA;
40 /* Fetch the old event mask from the inferior and modify it in place. */
41 err = DB_GET_SYMBOL (eventmask, ta, __nptl_threads_events);
42 if (err == TD_OK)
43 err = DB_GET_STRUCT (copy, ta, eventmask, td_thr_events_t);
44 if (err == TD_OK)
46 uint32_t idx;
47 for (idx = 0; idx < TD_EVENTSIZE; ++idx)
49 psaddr_t word;
50 uint32_t mask;
51 err = DB_GET_FIELD_LOCAL (word, ta, copy,
52 td_thr_events_t, event_bits, idx);
53 if (err != TD_OK)
54 break;
55 mask = (uintptr_t) word;
56 mask &= ~event->event_bits[idx];
57 word = (psaddr_t) (uintptr_t) mask;
58 err = DB_PUT_FIELD_LOCAL (ta, copy,
59 td_thr_events_t, event_bits, idx, word);
60 if (err != TD_OK)
61 break;
63 if (err == TD_NOAPLIC)
65 err = TD_OK;
66 while (idx < TD_EVENTSIZE)
67 if (event->event_bits[idx++] != 0)
69 err = TD_NOEVENT;
70 break;
73 if (err == TD_OK)
74 /* Now write it back to the inferior. */
75 err = DB_PUT_STRUCT (ta, eventmask, td_thr_events_t, copy);
78 return err;