1  /* Kernel-side additional module for the VxWorks threading support
       2     logic for GCC.  Written 2002 by Zack Weinberg.
       3  
       4     This file is distributed with GCC, but it is not part of GCC.
       5     The contents of this file are in the public domain.  */
       6  
       7  /* If you are using the Tornado IDE, copy this file to
       8     $WIND_BASE/target/config/comps/src/gthread_supp.c.  Then create a
       9     file named 10comp_gthread_supp.cdf in target/config/comps/vxWorks
      10     with the following contents:
      11  
      12     Component INCLUDE_GCC_GTHREAD {
      13        NAME                GCC 3.x gthread support (required by C++)
      14        CONFIGLETTES        gthread_supp.c
      15        REQUIRES            INCLUDE_CPLUS
      16        INCLUDE_WHEN        INCLUDE_CPLUS
      17        _FOLDER             FOLDER_CPLUS
      18     }
      19  
      20     If you are using command line builds, instead copy this file to
      21     $WIND_BASE/target/src/config/gthread_supp.c, and add the following
      22     block to target/src/config/usrExtra.c:
      23  
      24     #ifdef INCLUDE_CPLUS
      25     #include "../../src/config/gthread_supp.c"
      26     #endif
      27  
      28     You should now be able to rebuild your application using GCC 3.x.  */
      29  
      30  #include <vxWorks.h>
      31  #include <taskLib.h>
      32  
      33  /* This file provides these routines:  */
      34  extern void *__gthread_get_tsd_data (WIND_TCB *tcb);
      35  extern void __gthread_set_tsd_data (WIND_TCB *tcb, void *data);
      36  
      37  extern void __gthread_enter_tsd_dtor_context (WIND_TCB *tcb);
      38  extern void __gthread_leave_tsd_dtor_context (WIND_TCB *tcb);
      39  
      40  /* Set and retrieve the TSD data block for the task TCB.
      41  
      42     Possible choices for TSD_SLOT are:
      43       reserved1
      44       reserved2
      45       spare1
      46       spare2
      47       spare3
      48       spare4
      49     (these are all fields of the TCB structure; all have type 'int').
      50  
      51     If you find that the slot chosen by default is already used for
      52     something else, simply change the #define below and recompile this
      53     file.  No other file should reference TSD_SLOT directly.  */
      54  
      55  /* WARNING: This code is not 64-bit clean (it assumes that a pointer
      56     can be held in an 'int' without truncation).  As much of the rest
      57     of VxWorks also makes this assumption, we can't really avoid it.  */
      58  
      59  #define TSD_SLOT reserved1
      60  
      61  void *
      62  __gthread_get_tsd_data (WIND_TCB *tcb)
      63  {
      64    return (void *) (tcb->TSD_SLOT);
      65  }
      66  
      67  void
      68  __gthread_set_tsd_data (WIND_TCB *tcb, void *data)
      69  {
      70    tcb->TSD_SLOT = (int) data;
      71  }
      72  
      73  /* Enter and leave "TSD destructor context".  This is defined as a
      74     state in which it is safe to call free() from a task delete hook
      75     on a memory block allocated by the task being deleted.
      76     For VxWorks 5.x, nothing needs to be done.  */
      77  
      78  #if __GNUC__ >= 2
      79  #define UNUSED __attribute__((unused))
      80  #else
      81  #define UNUSED
      82  #endif
      83  
      84  void
      85  __gthread_enter_tsd_dtor_context (WIND_TCB *tcb UNUSED)
      86  {
      87  }
      88  
      89  void
      90  __gthread_leave_tsd_dtor_context (WIND_TCB *tcb UNUSED)
      91  {
      92  }