| 1 | /* Map thread ID to thread handle. |
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| 2 | Copyright (C) 1999, 2001 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. |
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| 5 | |
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| 6 | The GNU C Library is free software; you can redistribute it and/or |
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| 7 | modify it under the terms of the GNU Lesser General Public |
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| 8 | License as published by the Free Software Foundation; either |
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| 9 | version 2.1 of the License, or (at your option) any later version. |
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| 10 | |
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| 11 | The GNU C Library is distributed in the hope that it will be useful, |
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | Lesser General Public License for more details. |
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| 15 | |
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| 16 | You should have received a copy of the GNU Lesser General Public |
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| 17 | License along with the GNU C Library; if not, write to the Free |
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| 18 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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| 19 | 02111-1307 USA. */ |
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| 20 | |
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| 21 | #include "thread_dbP.h" |
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| 22 | |
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| 23 | |
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| 24 | td_err_e |
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| 25 | td_ta_map_id2thr (const td_thragent_t *ta, pthread_t pt, td_thrhandle_t *th) |
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| 26 | { |
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| 27 | struct pthread_handle_struct phc; |
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| 28 | struct _pthread_descr_struct pds; |
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| 29 | int pthread_threads_max; |
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| 30 | |
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| 31 | LOG ("td_ta_map_id2thr"); |
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| 32 | |
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| 33 | /* Test whether the TA parameter is ok. */ |
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| 34 | if (! ta_ok (ta)) |
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| 35 | return TD_BADTA; |
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| 36 | |
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| 37 | /* Make the following expression a bit smaller. */ |
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| 38 | pthread_threads_max = ta->pthread_threads_max; |
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| 39 | |
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| 40 | /* We can compute the entry in the handle array we want. */ |
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| 41 | if (ps_pdread (ta->ph, ta->handles + pt % pthread_threads_max, &phc, |
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| 42 | sizeof (struct pthread_handle_struct)) != PS_OK) |
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| 43 | return TD_ERR; /* XXX Other error value? */ |
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| 44 | |
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| 45 | /* Test whether this entry is in use. */ |
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| 46 | if (phc.h_descr == NULL) |
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| 47 | return TD_BADTH; |
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| 48 | |
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| 49 | /* Next test: get the descriptor to see whether this is not an old |
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| 50 | thread handle. */ |
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| 51 | if (ps_pdread (ta->ph, phc.h_descr, &pds, |
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| 52 | sizeof (struct _pthread_descr_struct)) != PS_OK) |
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| 53 | return TD_ERR; /* XXX Other error value? */ |
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| 54 | |
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| 55 | if (pds.p_tid != pt) |
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| 56 | return TD_BADTH; |
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| 57 | |
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| 58 | if (pds.p_terminated != 0) |
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| 59 | return TD_NOTHR; |
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| 60 | |
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| 61 | /* Create the `td_thrhandle_t' object. */ |
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| 62 | th->th_ta_p = (td_thragent_t *) ta; |
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| 63 | th->th_unique = phc.h_descr; |
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| 64 | |
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| 65 | return TD_OK; |
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| 66 | } |
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