posix: _POSIX_Mutex_Default_attributes

Make _POSIX_Mutex_Default_attributes constant and independent of the
scheduler instance.  Use INT_MAX to indicate the default ceiling
priority.

cpukit/posix/Makefile.am

@@ -20,6 +20,7 @@ include_rtems_posix_HEADERS += include/rtems/posix/key.h
 include_rtems_posix_HEADERS += include/rtems/posix/keyimpl.h
 include_rtems_posix_HEADERS += include/rtems/posix/config.h
 include_rtems_posix_HEADERS += include/rtems/posix/posixapi.h
+include_rtems_posix_HEADERS += include/rtems/posix/priorityimpl.h
 
 if HAS_PTHREADS
 # include
@@ -37,7 +38,6 @@ include_rtems_posix_HEADERS += include/rtems/posix/mqueue.h
 include_rtems_posix_HEADERS += include/rtems/posix/mqueueimpl.h
 include_rtems_posix_HEADERS += include/rtems/posix/mutex.h
 include_rtems_posix_HEADERS += include/rtems/posix/muteximpl.h
-include_rtems_posix_HEADERS += include/rtems/posix/priorityimpl.h
 include_rtems_posix_HEADERS += include/rtems/posix/psignal.h
 include_rtems_posix_HEADERS += include/rtems/posix/psignalimpl.h
 include_rtems_posix_HEADERS += include/rtems/posix/pthread.h

cpukit/posix/include/rtems/posix/muteximpl.h

@@ -50,7 +50,7 @@ extern Objects_Information _POSIX_Mutex_Information;
 /**
  *  The default mutex attributes structure.
  */
-extern pthread_mutexattr_t _POSIX_Mutex_Default_attributes;
+extern const pthread_mutexattr_t _POSIX_Mutex_Default_attributes;
 
 RTEMS_INLINE_ROUTINE void _POSIX_Mutex_Acquire_critical(
   POSIX_Mutex_Control  *the_mutex,

cpukit/posix/include/rtems/posix/priorityimpl.h

@@ -59,6 +59,16 @@ extern "C" {
  */
 #define POSIX_SCHEDULER_MINIMUM_PRIORITY (1)
 
+/**
+ * @brief Gets the maximum POSIX API priority for this scheduler instance.
+ *
+ * Such a priority is valid.  A scheduler instance may support priority values
+ * that are not representable as an integer.
+ *
+ * @return The maximum POSIX API priority for this scheduler instance.
+ */
+int _POSIX_Priority_Get_maximum( const Scheduler_Control *scheduler );
+
 /**
  * @brief Check if POSIX priority is valid.
  * 

cpukit/posix/preinstall.am

@@ -43,6 +43,10 @@ $(PROJECT_INCLUDE)/rtems/posix/posixapi.h: include/rtems/posix/posixapi.h $(PROJ
 	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/rtems/posix/posixapi.h
 PREINSTALL_FILES += $(PROJECT_INCLUDE)/rtems/posix/posixapi.h
 
+$(PROJECT_INCLUDE)/rtems/posix/priorityimpl.h: include/rtems/posix/priorityimpl.h $(PROJECT_INCLUDE)/rtems/posix/$(dirstamp)
+	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/rtems/posix/priorityimpl.h
+PREINSTALL_FILES += $(PROJECT_INCLUDE)/rtems/posix/priorityimpl.h
+
 if HAS_PTHREADS
 $(PROJECT_INCLUDE)/aio.h: include/aio.h $(PROJECT_INCLUDE)/$(dirstamp)
 	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/aio.h
@@ -85,10 +89,6 @@ $(PROJECT_INCLUDE)/rtems/posix/muteximpl.h: include/rtems/posix/muteximpl.h $(PR
 	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/rtems/posix/muteximpl.h
 PREINSTALL_FILES += $(PROJECT_INCLUDE)/rtems/posix/muteximpl.h
 
-$(PROJECT_INCLUDE)/rtems/posix/priorityimpl.h: include/rtems/posix/priorityimpl.h $(PROJECT_INCLUDE)/rtems/posix/$(dirstamp)
-	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/rtems/posix/priorityimpl.h
-PREINSTALL_FILES += $(PROJECT_INCLUDE)/rtems/posix/priorityimpl.h
-
 $(PROJECT_INCLUDE)/rtems/posix/psignal.h: include/rtems/posix/psignal.h $(PROJECT_INCLUDE)/rtems/posix/$(dirstamp)
 	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/rtems/posix/psignal.h
 PREINSTALL_FILES += $(PROJECT_INCLUDE)/rtems/posix/psignal.h

cpukit/posix/src/mutex.c

@@ -18,21 +18,25 @@
 #include "config.h"
 #endif
 
-#include <errno.h>
-#include <pthread.h>
 #include <limits.h>
 
-#include <rtems/system.h>
 #include <rtems/config.h>
 #include <rtems/sysinit.h>
-#include <rtems/score/coremuteximpl.h>
-#include <rtems/score/watchdog.h>
 #include <rtems/posix/muteximpl.h>
-#include <rtems/posix/priorityimpl.h>
+#include <rtems/score/objectimpl.h>
 
 Objects_Information _POSIX_Mutex_Information;
 
-pthread_mutexattr_t _POSIX_Mutex_Default_attributes;
+const pthread_mutexattr_t _POSIX_Mutex_Default_attributes = {
+#if defined(_UNIX98_THREAD_MUTEX_ATTRIBUTES)
+  .type           = PTHREAD_MUTEX_DEFAULT,
+#endif
+  .is_initialized = true,
+  .process_shared = PTHREAD_PROCESS_PRIVATE,
+  .prio_ceiling   = INT_MAX,
+  .protocol       = PTHREAD_PRIO_NONE,
+  .recursive      = false
+};
 
 /*
  *  _POSIX_Mutex_Manager_initialization
@@ -47,21 +51,6 @@ pthread_mutexattr_t _POSIX_Mutex_Default_attributes;
 
 static void _POSIX_Mutex_Manager_initialization(void)
 {
-  pthread_mutexattr_t *default_attr = &_POSIX_Mutex_Default_attributes;
-
-  /*
-   * Since the maximum priority is run-time configured, this
-   * structure cannot be initialized statically.
-   */
-  default_attr->is_initialized = true;
-  default_attr->process_shared = PTHREAD_PROCESS_PRIVATE;
-  default_attr->prio_ceiling   = POSIX_SCHEDULER_MAXIMUM_PRIORITY;
-  default_attr->protocol       = PTHREAD_PRIO_NONE;
-  default_attr->recursive      = false;
-  #if defined(_UNIX98_THREAD_MUTEX_ATTRIBUTES)
-    default_attr->type         = PTHREAD_MUTEX_DEFAULT;
-  #endif
-
   /*
    * Initialize the POSIX mutex object class information structure.
    */

cpukit/posix/src/mutexinit.c

@@ -36,6 +36,7 @@ int pthread_mutex_init(
   POSIX_Mutex_Control       *the_mutex;
   const pthread_mutexattr_t *the_attr;
   POSIX_Mutex_Protocol       protocol;
+  const Scheduler_Control   *scheduler;
   Priority_Control           priority;
 
   if ( attr ) the_attr = attr;
@@ -105,11 +106,20 @@ int pthread_mutex_init(
 #endif
 
   if ( protocol == POSIX_MUTEX_PRIORITY_CEILING ) {
-    if ( !_POSIX_Priority_Is_valid( the_attr->prio_ceiling ) ) {
+    int prio_ceiling;
+
+    scheduler = _Scheduler_Get_own( _Thread_Get_executing() );
+    prio_ceiling = the_attr->prio_ceiling;
+
+    if ( prio_ceiling == INT_MAX ) {
+      prio_ceiling = _POSIX_Priority_Get_maximum( scheduler );
+    }
+
+    if ( !_POSIX_Priority_Is_valid( prio_ceiling ) ) {
       return EINVAL;
     }
 
-    priority = _POSIX_Priority_To_core( the_attr->prio_ceiling );
+    priority = _POSIX_Priority_To_core( prio_ceiling );
   }
 
   the_mutex = _POSIX_Mutex_Allocate();

cpukit/posix/src/psxpriorityisvalid.c

@@ -18,9 +18,17 @@
 #include "config.h"
 #endif
 
-#include <rtems/system.h>
 #include <rtems/posix/priorityimpl.h>
 
+int _POSIX_Priority_Get_maximum( const Scheduler_Control *scheduler )
+{
+  if ( scheduler->maximum_priority < INT_MAX ) {
+    return (int) scheduler->maximum_priority - 1;
+  } else {
+    return INT_MAX;
+  }
+}
+
 bool _POSIX_Priority_Is_valid(
   int priority
 )

cpukit/posix/src/sched_getprioritymax.c

@@ -21,10 +21,9 @@
 #endif
 
 #include <sched.h>
-#include <errno.h>
 
-#include <rtems/system.h>
 #include <rtems/seterr.h>
+#include <rtems/posix/priorityimpl.h>
 #include <rtems/score/schedulerimpl.h>
 
 int sched_get_priority_max(
@@ -45,10 +44,5 @@ int sched_get_priority_max(
   }
 
   scheduler = _Scheduler_Get_own( _Thread_Get_executing() );
-
+  return _POSIX_Priority_Get_maximum( scheduler );
-  if ( scheduler->maximum_priority > INT_MAX ) {
-    return INT_MAX;
-  }
-
-  return (int) scheduler->maximum_priority - 1;
 }