1 | /* |
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2 | * Thread Handler |
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3 | * |
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4 | * |
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5 | * COPYRIGHT (c) 1989-2008. |
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6 | * On-Line Applications Research Corporation (OAR). |
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7 | * |
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8 | * The license and distribution terms for this file may be |
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9 | * found in found in the file LICENSE in this distribution or at |
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10 | * http://www.rtems.com/license/LICENSE. |
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11 | * |
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12 | * $Id$ |
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13 | */ |
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14 | |
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15 | #if HAVE_CONFIG_H |
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16 | #include "config.h" |
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17 | #endif |
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18 | |
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19 | #include <rtems/system.h> |
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20 | #include <rtems/score/apiext.h> |
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21 | #include <rtems/score/context.h> |
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22 | #include <rtems/score/interr.h> |
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23 | #include <rtems/score/isr.h> |
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24 | #include <rtems/score/object.h> |
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25 | #include <rtems/score/priority.h> |
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26 | #include <rtems/score/states.h> |
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27 | #include <rtems/score/sysstate.h> |
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28 | #include <rtems/score/thread.h> |
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29 | #include <rtems/score/threadq.h> |
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30 | #include <rtems/score/userext.h> |
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31 | #include <rtems/score/wkspace.h> |
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32 | |
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33 | /* |
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34 | * _Thread_Close |
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35 | * |
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36 | * DESCRIPTION: |
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37 | * |
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38 | * This routine frees all memory associated with the specified |
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39 | * thread and removes it from the local object table so no further |
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40 | * operations on this thread are allowed. |
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41 | */ |
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42 | |
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43 | void _Thread_Close( |
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44 | Objects_Information *information, |
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45 | Thread_Control *the_thread |
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46 | ) |
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47 | { |
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48 | |
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49 | /* |
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50 | * Now we are in a dispatching critical section again and we |
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51 | * can take the thread OUT of the published set. It is invalid |
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52 | * to use this thread's Id after this call. This will prevent |
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53 | * any other task from attempting to initiate a call on this task. |
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54 | */ |
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55 | _Objects_Invalidate_Id( information, &the_thread->Object ); |
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56 | |
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57 | /* |
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58 | * We assume the Allocator Mutex is locked when we get here. |
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59 | * This provides sufficient protection to let the user extensions |
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60 | * run but as soon as we get back, we will make the thread |
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61 | * disappear and set a transient state on it. So we temporarily |
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62 | * unnest dispatching. |
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63 | */ |
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64 | _Thread_Unnest_dispatch(); |
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65 | |
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66 | _User_extensions_Thread_delete( the_thread ); |
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67 | |
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68 | _Thread_Disable_dispatch(); |
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69 | |
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70 | /* |
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71 | * Now we are in a dispatching critical section again and we |
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72 | * can take the thread OUT of the published set. It is invalid |
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73 | * to use this thread's Id OR name after this call. |
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74 | */ |
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75 | _Objects_Close( information, &the_thread->Object ); |
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76 | |
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77 | /* |
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78 | * By setting the dormant state, the thread will not be considered |
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79 | * for scheduling when we remove any blocking states. |
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80 | */ |
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81 | _Thread_Set_state( the_thread, STATES_DORMANT ); |
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82 | |
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83 | if ( !_Thread_queue_Extract_with_proxy( the_thread ) ) { |
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84 | if ( _Watchdog_Is_active( &the_thread->Timer ) ) |
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85 | (void) _Watchdog_Remove( &the_thread->Timer ); |
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86 | } |
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87 | |
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88 | /* |
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89 | * The thread might have been FP. So deal with that. |
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90 | */ |
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91 | #if ( CPU_HARDWARE_FP == TRUE ) || ( CPU_SOFTWARE_FP == TRUE ) |
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92 | #if ( CPU_USE_DEFERRED_FP_SWITCH == TRUE ) |
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93 | if ( _Thread_Is_allocated_fp( the_thread ) ) |
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94 | _Thread_Deallocate_fp(); |
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95 | #endif |
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96 | the_thread->fp_context = NULL; |
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97 | |
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98 | if ( the_thread->Start.fp_context ) |
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99 | (void) _Workspace_Free( the_thread->Start.fp_context ); |
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100 | #endif |
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101 | |
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102 | /* |
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103 | * Free the rest of the memory associated with this task |
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104 | * and set the associated pointers to NULL for safety. |
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105 | */ |
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106 | _Thread_Stack_Free( the_thread ); |
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107 | the_thread->Start.stack = NULL; |
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108 | |
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109 | if ( the_thread->extensions ) |
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110 | (void) _Workspace_Free( the_thread->extensions ); |
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111 | the_thread->extensions = NULL; |
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112 | } |
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