1 | /** |
---|
2 | * @file |
---|
3 | * |
---|
4 | * @brief Private Support Information for POSIX Threads |
---|
5 | * @ingroup POSIX_PTHREADS Private Threads |
---|
6 | */ |
---|
7 | |
---|
8 | /* |
---|
9 | * COPYRIGHT (c) 1989-2014. |
---|
10 | * On-Line Applications Research Corporation (OAR). |
---|
11 | * |
---|
12 | * The license and distribution terms for this file may be |
---|
13 | * found in the file LICENSE in this distribution or at |
---|
14 | * http://www.rtems.org/license/LICENSE. |
---|
15 | */ |
---|
16 | |
---|
17 | #if HAVE_CONFIG_H |
---|
18 | #include "config.h" |
---|
19 | #endif |
---|
20 | #include <stdio.h> |
---|
21 | |
---|
22 | #include <errno.h> |
---|
23 | #include <pthread.h> |
---|
24 | #include <limits.h> |
---|
25 | #include <assert.h> |
---|
26 | |
---|
27 | #include <rtems/system.h> |
---|
28 | #include <rtems/config.h> |
---|
29 | #include <rtems/sysinit.h> |
---|
30 | #include <rtems/score/stack.h> |
---|
31 | #include <rtems/score/threadimpl.h> |
---|
32 | #include <rtems/score/threadqimpl.h> |
---|
33 | #include <rtems/score/userextimpl.h> |
---|
34 | #include <rtems/score/wkspace.h> |
---|
35 | #include <rtems/posix/pthreadimpl.h> |
---|
36 | #include <rtems/posix/priorityimpl.h> |
---|
37 | #include <rtems/posix/psignalimpl.h> |
---|
38 | #include <rtems/posix/config.h> |
---|
39 | #include <rtems/posix/keyimpl.h> |
---|
40 | #include <rtems/score/assert.h> |
---|
41 | #include <rtems/score/schedulerimpl.h> |
---|
42 | |
---|
43 | Thread_Information _POSIX_Threads_Information; |
---|
44 | |
---|
45 | void _POSIX_Threads_Sporadic_timer( Watchdog_Control *watchdog ) |
---|
46 | { |
---|
47 | POSIX_API_Control *api; |
---|
48 | Thread_Control *the_thread; |
---|
49 | Thread_queue_Context queue_context; |
---|
50 | |
---|
51 | api = RTEMS_CONTAINER_OF( watchdog, POSIX_API_Control, Sporadic.Timer ); |
---|
52 | the_thread = api->Sporadic.thread; |
---|
53 | |
---|
54 | _Thread_queue_Context_initialize( &queue_context ); |
---|
55 | _Thread_queue_Context_clear_priority_updates( &queue_context ); |
---|
56 | _Thread_Wait_acquire( the_thread, &queue_context ); |
---|
57 | |
---|
58 | if ( _Priority_Node_is_active( &api->Sporadic.Low_priority ) ) { |
---|
59 | _Thread_Priority_add( |
---|
60 | the_thread, |
---|
61 | &the_thread->Real_priority, |
---|
62 | &queue_context |
---|
63 | ); |
---|
64 | _Thread_Priority_remove( |
---|
65 | the_thread, |
---|
66 | &api->Sporadic.Low_priority, |
---|
67 | &queue_context |
---|
68 | ); |
---|
69 | _Priority_Node_set_inactive( &api->Sporadic.Low_priority ); |
---|
70 | } |
---|
71 | |
---|
72 | _Watchdog_Per_CPU_remove_monotonic( &api->Sporadic.Timer ); |
---|
73 | _POSIX_Threads_Sporadic_timer_insert( the_thread, api ); |
---|
74 | |
---|
75 | _Thread_Wait_release( the_thread, &queue_context ); |
---|
76 | _Thread_Priority_update( &queue_context ); |
---|
77 | } |
---|
78 | |
---|
79 | void _POSIX_Threads_Sporadic_budget_callout( Thread_Control *the_thread ) |
---|
80 | { |
---|
81 | POSIX_API_Control *api; |
---|
82 | Thread_queue_Context queue_context; |
---|
83 | |
---|
84 | api = the_thread->API_Extensions[ THREAD_API_POSIX ]; |
---|
85 | |
---|
86 | _Thread_queue_Context_initialize( &queue_context ); |
---|
87 | _Thread_queue_Context_clear_priority_updates( &queue_context ); |
---|
88 | _Thread_Wait_acquire( the_thread, &queue_context ); |
---|
89 | |
---|
90 | /* |
---|
91 | * This will prevent the thread from consuming its entire "budget" |
---|
92 | * while at low priority. |
---|
93 | */ |
---|
94 | the_thread->cpu_time_budget = UINT32_MAX; |
---|
95 | |
---|
96 | if ( !_Priority_Node_is_active( &api->Sporadic.Low_priority ) ) { |
---|
97 | _Thread_Priority_add( |
---|
98 | the_thread, |
---|
99 | &api->Sporadic.Low_priority, |
---|
100 | &queue_context |
---|
101 | ); |
---|
102 | _Thread_Priority_remove( |
---|
103 | the_thread, |
---|
104 | &the_thread->Real_priority, |
---|
105 | &queue_context |
---|
106 | ); |
---|
107 | } |
---|
108 | |
---|
109 | _Thread_Wait_release( the_thread, &queue_context ); |
---|
110 | _Thread_Priority_update( &queue_context ); |
---|
111 | } |
---|
112 | |
---|
113 | /* |
---|
114 | * _POSIX_Threads_Create_extension |
---|
115 | * |
---|
116 | * This method is invoked for each thread created. |
---|
117 | */ |
---|
118 | |
---|
119 | static bool _POSIX_Threads_Create_extension( |
---|
120 | Thread_Control *executing RTEMS_UNUSED, |
---|
121 | Thread_Control *created |
---|
122 | ) |
---|
123 | { |
---|
124 | POSIX_API_Control *api; |
---|
125 | POSIX_API_Control *executing_api; |
---|
126 | |
---|
127 | api = created->API_Extensions[ THREAD_API_POSIX ]; |
---|
128 | |
---|
129 | /* |
---|
130 | * If the thread is not a posix thread, then all posix signals are blocked |
---|
131 | * by default. |
---|
132 | * |
---|
133 | * The check for class == 1 is debug. Should never really happen. |
---|
134 | */ |
---|
135 | RTEMS_STATIC_ASSERT( SIGNAL_EMPTY_MASK == 0, signals_pending ); |
---|
136 | if ( _Objects_Get_API( created->Object.id ) == OBJECTS_POSIX_API |
---|
137 | #if defined(RTEMS_DEBUG) |
---|
138 | && _Objects_Get_class( created->Object.id ) == 1 |
---|
139 | #endif |
---|
140 | ) { |
---|
141 | executing_api = _Thread_Get_executing()->API_Extensions[ THREAD_API_POSIX ]; |
---|
142 | api->signals_unblocked = executing_api->signals_unblocked; |
---|
143 | } |
---|
144 | |
---|
145 | api->Sporadic.thread = created; |
---|
146 | _Watchdog_Preinitialize( &api->Sporadic.Timer, _Per_CPU_Get_by_index( 0 ) ); |
---|
147 | _Watchdog_Initialize( &api->Sporadic.Timer, _POSIX_Threads_Sporadic_timer ); |
---|
148 | _Priority_Node_set_inactive( &api->Sporadic.Low_priority ); |
---|
149 | |
---|
150 | return true; |
---|
151 | } |
---|
152 | |
---|
153 | static void _POSIX_Threads_Terminate_extension( Thread_Control *executing ) |
---|
154 | { |
---|
155 | POSIX_API_Control *api; |
---|
156 | ISR_lock_Context lock_context; |
---|
157 | |
---|
158 | api = executing->API_Extensions[ THREAD_API_POSIX ]; |
---|
159 | |
---|
160 | _Thread_State_acquire( executing, &lock_context ); |
---|
161 | |
---|
162 | if ( api->schedpolicy == SCHED_SPORADIC ) { |
---|
163 | _Watchdog_Per_CPU_remove_monotonic( &api->Sporadic.Timer ); |
---|
164 | } |
---|
165 | |
---|
166 | _Thread_State_release( executing, &lock_context ); |
---|
167 | } |
---|
168 | |
---|
169 | /* |
---|
170 | * _POSIX_Threads_Exitted_extension |
---|
171 | * |
---|
172 | * This method is invoked each time a thread exits. |
---|
173 | */ |
---|
174 | static void _POSIX_Threads_Exitted_extension( |
---|
175 | Thread_Control *executing |
---|
176 | ) |
---|
177 | { |
---|
178 | /* |
---|
179 | * If the executing thread was not created with the POSIX API, then this |
---|
180 | * API do not get to define its exit behavior. |
---|
181 | */ |
---|
182 | if ( _Objects_Get_API( executing->Object.id ) == OBJECTS_POSIX_API ) |
---|
183 | pthread_exit( executing->Wait.return_argument ); |
---|
184 | } |
---|
185 | |
---|
186 | User_extensions_Control _POSIX_Threads_User_extensions = { |
---|
187 | .Callouts = { |
---|
188 | .thread_create = _POSIX_Threads_Create_extension, |
---|
189 | .thread_exitted = _POSIX_Threads_Exitted_extension, |
---|
190 | .thread_terminate = _POSIX_Threads_Terminate_extension |
---|
191 | } |
---|
192 | }; |
---|
193 | |
---|
194 | /* |
---|
195 | * _POSIX_Threads_Manager_initialization |
---|
196 | * |
---|
197 | * This routine initializes all threads manager related data structures. |
---|
198 | */ |
---|
199 | static void _POSIX_Threads_Manager_initialization(void) |
---|
200 | { |
---|
201 | _Thread_Initialize_information( |
---|
202 | &_POSIX_Threads_Information, /* object information table */ |
---|
203 | OBJECTS_POSIX_API, /* object API */ |
---|
204 | OBJECTS_POSIX_THREADS, /* object class */ |
---|
205 | Configuration_POSIX_API.maximum_threads, |
---|
206 | /* maximum objects of this class */ |
---|
207 | true, /* true if names for this object are strings */ |
---|
208 | _POSIX_PATH_MAX /* maximum length of each object's name */ |
---|
209 | ); |
---|
210 | |
---|
211 | /* |
---|
212 | * Add all the extensions for this API |
---|
213 | */ |
---|
214 | _User_extensions_Add_API_set( &_POSIX_Threads_User_extensions ); |
---|
215 | |
---|
216 | /* |
---|
217 | * If we supported MP, then here we would ... |
---|
218 | * Register the MP Process Packet routine. |
---|
219 | */ |
---|
220 | } |
---|
221 | |
---|
222 | RTEMS_SYSINIT_ITEM( |
---|
223 | _POSIX_Threads_Manager_initialization, |
---|
224 | RTEMS_SYSINIT_POSIX_THREADS, |
---|
225 | RTEMS_SYSINIT_ORDER_MIDDLE |
---|
226 | ); |
---|