Update.
[glibc.git] / linuxthreads_db / td_thr_event_getmsg.c
blobbf4ddd4ade1608f17dba14dfc9b69f7d39be888e
1 /* Retrieve event.
2 Copyright (C) 1999, 2001, 2002 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.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 <stddef.h>
22 #include <string.h>
24 #include "thread_dbP.h"
27 td_err_e
28 td_thr_event_getmsg (const td_thrhandle_t *th, td_event_msg_t *msg)
30 td_eventbuf_t event;
32 LOG ("td_thr_event_getmsg");
34 /* If the thread descriptor has not yet been created there cannot be
35 any event. */
36 if (th->th_unique == NULL)
37 return TD_NOMSG;
39 /* Read the even structure from the target. */
40 if (ps_pdread (th->th_ta_p->ph,
41 ((char *) th->th_unique
42 + offsetof (struct _pthread_descr_struct, p_eventbuf)),
43 &event, sizeof (td_eventbuf_t)) != PS_OK)
44 return TD_ERR; /* XXX Other error value? */
46 /* Check whether an event occurred. */
47 if (event.eventnum == TD_EVENT_NONE)
48 /* Nothing. */
49 return TD_NOMSG;
51 /* Fill the user's data structure. */
52 msg->event = event.eventnum;
53 msg->th_p = th;
54 msg->msg.data = (uintptr_t) event.eventdata;
56 /* And clear the event message in the target. */
57 memset (&event, '\0', sizeof (td_eventbuf_t));
58 if (ps_pdwrite (th->th_ta_p->ph,
59 ((char *) th->th_unique
60 + offsetof (struct _pthread_descr_struct, p_eventbuf)),
61 &event, sizeof (td_eventbuf_t)) != PS_OK)
62 return TD_ERR; /* XXX Other error value? */
64 return TD_OK;