posix: Provide shared memory objects by default

Update #2514.

cpukit/Makefile.am

@@ -508,11 +508,13 @@ librtemscpu_a_SOURCES += posix/src/keysetspecific.c
 librtemscpu_a_SOURCES += posix/src/lio_listio.c
 librtemscpu_a_SOURCES += posix/src/mlockall.c
 librtemscpu_a_SOURCES += posix/src/mlock.c
+librtemscpu_a_SOURCES += posix/src/mmap.c
 librtemscpu_a_SOURCES += posix/src/mprotect.c
 librtemscpu_a_SOURCES += posix/src/mqueueconfig.c
 librtemscpu_a_SOURCES += posix/src/msync.c
 librtemscpu_a_SOURCES += posix/src/munlockall.c
 librtemscpu_a_SOURCES += posix/src/munlock.c
+librtemscpu_a_SOURCES += posix/src/munmap.c
 librtemscpu_a_SOURCES += posix/src/mutexattrdestroy.c
 librtemscpu_a_SOURCES += posix/src/mutexattrgetprioceiling.c
 librtemscpu_a_SOURCES += posix/src/mutexattrgetprotocol.c
@@ -620,7 +622,13 @@ librtemscpu_a_SOURCES += posix/src/semunlink.c
 librtemscpu_a_SOURCES += posix/src/semwait.c
 librtemscpu_a_SOURCES += posix/src/setcancelstate.c
 librtemscpu_a_SOURCES += posix/src/setcanceltype.c
+librtemscpu_a_SOURCES += posix/src/shm.c
 librtemscpu_a_SOURCES += posix/src/shmconfig.c
+librtemscpu_a_SOURCES += posix/src/shmheap.c
+librtemscpu_a_SOURCES += posix/src/shmopen.c
+librtemscpu_a_SOURCES += posix/src/shmops.c
+librtemscpu_a_SOURCES += posix/src/shmunlink.c
+librtemscpu_a_SOURCES += posix/src/shmwkspace.c
 librtemscpu_a_SOURCES += posix/src/sigaddset.c
 librtemscpu_a_SOURCES += posix/src/sigdelset.c
 librtemscpu_a_SOURCES += posix/src/sigemptyset.c
@@ -1039,7 +1047,6 @@ librtemscpu_a_SOURCES += posix/src/getitimer.c
 librtemscpu_a_SOURCES += posix/src/kill.c
 librtemscpu_a_SOURCES += posix/src/killinfo.c
 librtemscpu_a_SOURCES += posix/src/kill_r.c
-librtemscpu_a_SOURCES += posix/src/mmap.c
 librtemscpu_a_SOURCES += posix/src/mqueue.c
 librtemscpu_a_SOURCES += posix/src/mqueueclose.c
 librtemscpu_a_SOURCES += posix/src/mqueuedeletesupp.c
@@ -1054,7 +1061,6 @@ librtemscpu_a_SOURCES += posix/src/mqueuesetattr.c
 librtemscpu_a_SOURCES += posix/src/mqueuetimedreceive.c
 librtemscpu_a_SOURCES += posix/src/mqueuetimedsend.c
 librtemscpu_a_SOURCES += posix/src/mqueueunlink.c
-librtemscpu_a_SOURCES += posix/src/munmap.c
 librtemscpu_a_SOURCES += posix/src/pause.c
 librtemscpu_a_SOURCES += posix/src/psignal.c
 librtemscpu_a_SOURCES += posix/src/psignalclearprocesssignals.c
@@ -1074,11 +1080,6 @@ librtemscpu_a_SOURCES += posix/src/pthreadsetschedprio.c
 librtemscpu_a_SOURCES += posix/src/pthreadsigmask.c
 librtemscpu_a_SOURCES += posix/src/ptimer.c
 librtemscpu_a_SOURCES += posix/src/setitimer.c
-librtemscpu_a_SOURCES += posix/src/shm.c
-librtemscpu_a_SOURCES += posix/src/shmheap.c
-librtemscpu_a_SOURCES += posix/src/shmopen.c
-librtemscpu_a_SOURCES += posix/src/shmunlink.c
-librtemscpu_a_SOURCES += posix/src/shmwkspace.c
 librtemscpu_a_SOURCES += posix/src/sigaction.c
 librtemscpu_a_SOURCES += posix/src/signal_2.c
 librtemscpu_a_SOURCES += posix/src/sigpending.c

cpukit/include/rtems/confdefs.h

@@ -34,6 +34,7 @@
 #include <rtems/score/wkspace.h>
 #include <rtems/posix/key.h>
 #include <rtems/posix/semaphore.h>
+#include <rtems/posix/shm.h>
 
 #include <limits.h>
 
@@ -1940,6 +1941,10 @@ extern rtems_initialization_tasks_table Initialization_tasks[];
     #define CONFIGURE_MAXIMUM_POSIX_SEMAPHORES \
       rtems_resource_unlimited(CONFIGURE_UNLIMITED_ALLOCATION_SIZE)
   #endif
+  #if !defined(CONFIGURE_MAXIMUM_POSIX_SHMS)
+    #define CONFIGURE_MAXIMUM_POSIX_SHMS \
+      rtems_resource_unlimited(CONFIGURE_UNLIMITED_ALLOCATION_SIZE)
+  #endif
 
   #ifdef RTEMS_POSIX_API
     #if !defined(CONFIGURE_MAXIMUM_POSIX_THREADS)
@@ -1960,10 +1965,6 @@ extern rtems_initialization_tasks_table Initialization_tasks[];
       #define CONFIGURE_MAXIMUM_POSIX_MESSAGE_QUEUES \
         rtems_resource_unlimited(CONFIGURE_UNLIMITED_ALLOCATION_SIZE)
     #endif
-    #if !defined(CONFIGURE_MAXIMUM_POSIX_SHMS)
-      #define CONFIGURE_MAXIMUM_POSIX_SHMS \
-        rtems_resource_unlimited(CONFIGURE_UNLIMITED_ALLOCATION_SIZE)
-    #endif
   #endif /* RTEMS_POSIX_API */
 #endif /* CONFIGURE_UNLIMITED_OBJECTS */
 
@@ -2323,6 +2324,20 @@ extern rtems_initialization_tasks_table Initialization_tasks[];
   _Configure_POSIX_Named_Object_RAM( \
      _semaphores, sizeof(POSIX_Semaphore_Control) )
 
+/**
+ * Configure the maximum number of POSIX shared memory objects.
+ */
+#ifndef CONFIGURE_MAXIMUM_POSIX_SHMS
+  #define CONFIGURE_MAXIMUM_POSIX_SHMS 0
+#endif
+
+/*
+ * This macro is calculated to specify the memory required for
+ * POSIX API shared memory.
+ */
+#define _CONFIGURE_MEMORY_FOR_POSIX_SHMS(_shms) \
+  _Configure_POSIX_Named_Object_RAM(_shms, sizeof(POSIX_Shm_Control) )
+
 /*
  *  The rest of the POSIX threads API features are only available when
  *  POSIX is enabled.
@@ -2334,7 +2349,6 @@ extern rtems_initialization_tasks_table Initialization_tasks[];
   #include <rtems/posix/mqueue.h>
   #include <rtems/posix/psignal.h>
   #include <rtems/posix/pthread.h>
-  #include <rtems/posix/shm.h>
   #include <rtems/posix/threadsup.h>
   #include <rtems/posix/timer.h>
 
@@ -2393,32 +2407,6 @@ extern rtems_initialization_tasks_table Initialization_tasks[];
     _Configure_POSIX_Named_Object_RAM( \
        _message_queues, sizeof(POSIX_Message_queue_Control) )
 
-  /**
-   * Configure the maximum number of POSIX shared memory objects.
-   */
-  #if !defined(CONFIGURE_MAXIMUM_POSIX_SHMS)
-    #define CONFIGURE_MAXIMUM_POSIX_SHMS 0
-  #else
-    #ifdef CONFIGURE_INIT
-      #if !defined(CONFIGURE_HAS_OWN_POSIX_SHM_OBJECT_OPERATIONS)
-        const POSIX_Shm_Object_operations _POSIX_Shm_Object_operations = {
-          _POSIX_Shm_Object_create_from_workspace,
-          _POSIX_Shm_Object_resize_from_workspace,
-          _POSIX_Shm_Object_delete_from_workspace,
-          _POSIX_Shm_Object_read_from_workspace,
-          _POSIX_Shm_Object_mmap_from_workspace
-        };
-      #endif
-    #endif
-  #endif
-
-  /*
-   * This macro is calculated to specify the memory required for
-   * POSIX API shared memory.
-   */
-  #define _CONFIGURE_MEMORY_FOR_POSIX_SHMS(_shms) \
-    _Configure_POSIX_Named_Object_RAM(_shms, sizeof(POSIX_Shm_Control) )
-
   #ifdef CONFIGURE_POSIX_INIT_THREAD_TABLE
     #ifndef CONFIGURE_POSIX_HAS_OWN_INIT_THREAD_TABLE
       #ifndef CONFIGURE_POSIX_INIT_THREAD_ENTRY_POINT
@@ -2559,8 +2547,6 @@ extern rtems_initialization_tasks_table Initialization_tasks[];
         CONFIGURE_MAXIMUM_POSIX_QUEUED_SIGNALS) + \
       _CONFIGURE_MEMORY_FOR_POSIX_MESSAGE_QUEUES( \
         CONFIGURE_MAXIMUM_POSIX_MESSAGE_QUEUES) + \
-      _CONFIGURE_MEMORY_FOR_POSIX_SHMS( \
-        CONFIGURE_MAXIMUM_POSIX_SHMS) + \
       _CONFIGURE_MEMORY_FOR_POSIX_TIMERS(CONFIGURE_MAXIMUM_POSIX_TIMERS))
 #else
   /*
@@ -2721,6 +2707,8 @@ extern rtems_initialization_tasks_table Initialization_tasks[];
       CONFIGURE_MAXIMUM_POSIX_KEY_VALUE_PAIRS ) + \
    _CONFIGURE_MEMORY_FOR_POSIX_SEMAPHORES( \
      CONFIGURE_MAXIMUM_POSIX_SEMAPHORES) + \
+   _CONFIGURE_MEMORY_FOR_POSIX_SHMS( \
+     CONFIGURE_MAXIMUM_POSIX_SHMS) + \
    _CONFIGURE_MEMORY_FOR_POSIX + \
    _CONFIGURE_MEMORY_FOR_STATIC_EXTENSIONS + \
    _CONFIGURE_MEMORY_FOR_MP + \
@@ -3226,9 +3214,7 @@ extern rtems_initialization_tasks_table Initialization_tasks[];
     uint32_t POSIX_MESSAGE_QUEUES;
 #endif
     uint32_t POSIX_SEMAPHORES;
-#ifdef RTEMS_POSIX_API
     uint32_t POSIX_SHMS;
-#endif
 
     /* Stack space sizes */
     uint32_t IDLE_TASKS_STACK;
@@ -3268,18 +3254,16 @@ extern rtems_initialization_tasks_table Initialization_tasks[];
     _CONFIGURE_MEMORY_FOR_POSIX_KEYS( _CONFIGURE_POSIX_KEYS, \
                                      CONFIGURE_MAXIMUM_POSIX_KEY_VALUE_PAIRS ),
 
-#ifdef RTEMS_POSIX_API
     /* POSIX API Pieces */
+#ifdef RTEMS_POSIX_API
+    _CONFIGURE_MEMORY_FOR_POSIX_TIMERS( CONFIGURE_MAXIMUM_POSIX_TIMERS ),
     _CONFIGURE_MEMORY_FOR_POSIX_QUEUED_SIGNALS(
       CONFIGURE_MAXIMUM_POSIX_QUEUED_SIGNALS ),
     _CONFIGURE_MEMORY_FOR_POSIX_MESSAGE_QUEUES(
       CONFIGURE_MAXIMUM_POSIX_MESSAGE_QUEUES ),
 #endif
     _CONFIGURE_MEMORY_FOR_POSIX_SEMAPHORES( CONFIGURE_MAXIMUM_POSIX_SEMAPHORES ),
-#ifdef RTEMS_POSIX_API
     _CONFIGURE_MEMORY_FOR_POSIX_SHMS( CONFIGURE_MAXIMUM_POSIX_SHMS ),
-    _CONFIGURE_MEMORY_FOR_POSIX_TIMERS( CONFIGURE_MAXIMUM_POSIX_TIMERS ),
-#endif
 
     /* Stack space sizes */
     _CONFIGURE_IDLE_TASKS_STACK,
@@ -3344,7 +3328,6 @@ extern rtems_initialization_tasks_table Initialization_tasks[];
        (CONFIGURE_MAXIMUM_POSIX_TIMERS != 0) || \
        (CONFIGURE_MAXIMUM_POSIX_QUEUED_SIGNALS != 0) || \
        (CONFIGURE_MAXIMUM_POSIX_MESSAGE_QUEUES != 0) || \
-       (CONFIGURE_MAXIMUM_POSIX_SHMS != 0) || \
       defined(CONFIGURE_POSIX_INIT_THREAD_TABLE))
   #error "CONFIGURATION ERROR: POSIX API support not configured!!"
   #endif

cpukit/posix/src/shmops.c

@@ -0,0 +1,40 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2018, embedded brains GmbH <rtems@embedded-brains.de>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <rtems/posix/shm.h>
+
+const POSIX_Shm_Object_operations _POSIX_Shm_Object_operations = {
+  _POSIX_Shm_Object_create_from_workspace,
+  _POSIX_Shm_Object_resize_from_workspace,
+  _POSIX_Shm_Object_delete_from_workspace,
+  _POSIX_Shm_Object_read_from_workspace,
+  _POSIX_Shm_Object_mmap_from_workspace
+};

cpukit/rtems/src/rtemsobjectgetapiclassname.c

@@ -52,8 +52,8 @@ static const rtems_assoc_t rtems_object_api_posix_assoc[] = {
   { "Semaphore",               OBJECTS_POSIX_SEMAPHORES, 0},
 #ifdef RTEMS_POSIX_API
   { "Timer",                   OBJECTS_POSIX_TIMERS, 0},
-  { "Shared Memory",           OBJECTS_POSIX_SHMS, 0},
 #endif
+  { "Shared Memory",           OBJECTS_POSIX_SHMS, 0},
   { NULL,                      0, 0}
 };