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glibc  2.9
td_ta_map_id2thr.c File Reference
#include "thread_dbP.h"
#include <linuxthreads/internals.h>

Go to the source code of this file.


td_err_e td_ta_map_id2thr (const td_thragent_t *ta, pthread_t pt, td_thrhandle_t *th)

Function Documentation

td_err_e td_ta_map_id2thr ( const td_thragent_t *  ta,
pthread_t  pt,
td_thrhandle_t th 

Definition at line 26 of file td_ta_map_id2thr.c.

  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;