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