/**
* @file
*
* @brief Private Support Information for POSIX Threads
* @ingroup POSIX_PTHREADS Private Threads
*/
/*
* COPYRIGHT (c) 1989-2014.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <errno.h>
#include <pthread.h>
#include <limits.h>
#include <assert.h>
#include <rtems/system.h>
#include <rtems/config.h>
#include <rtems/sysinit.h>
#include <rtems/score/stack.h>
#include <rtems/score/threadimpl.h>
#include <rtems/score/threadqimpl.h>
#include <rtems/score/userextimpl.h>
#include <rtems/score/wkspace.h>
#include <rtems/posix/pthreadimpl.h>
#include <rtems/posix/priorityimpl.h>
#include <rtems/posix/psignalimpl.h>
#include <rtems/posix/config.h>
#include <rtems/posix/keyimpl.h>
#include <rtems/score/assert.h>
#include <rtems/score/cpusetimpl.h>
#include <rtems/score/schedulerimpl.h>
Thread_Information _POSIX_Threads_Information;
/*
* The default pthreads attributes structure.
*
* NOTE: Be careful .. if the default attribute set changes,
* _POSIX_Threads_Initialize_user_threads will need to be examined.
*/
pthread_attr_t _POSIX_Threads_Default_attributes = {
.is_initialized = true, /* is_initialized */
.stackaddr = NULL, /* stackaddr */
.stacksize = 0, /* stacksize -- will be adjusted to minimum */
.contentionscope = PTHREAD_SCOPE_PROCESS, /* contentionscope */
.inheritsched = PTHREAD_INHERIT_SCHED, /* inheritsched */
.schedpolicy = SCHED_FIFO, /* schedpolicy */
.schedparam =
{ /* schedparam */
2, /* sched_priority */
#if defined(_POSIX_SPORADIC_SERVER) || \
defined(_POSIX_THREAD_SPORADIC_SERVER)
0, /* sched_ss_low_priority */
{ 0L, 0 }, /* sched_ss_repl_period */
{ 0L, 0 }, /* sched_ss_init_budget */
0 /* sched_ss_max_repl */
#endif
},
#if HAVE_DECL_PTHREAD_ATTR_SETGUARDSIZE
.guardsize = 0, /* guardsize */
#endif
#if defined(_POSIX_THREAD_CPUTIME)
.cputime_clock_allowed = 1, /* cputime_clock_allowed */
#endif
.detachstate = PTHREAD_CREATE_JOINABLE, /* detachstate */
.affinitysetsize = 0,
.affinityset = NULL,
.affinitysetpreallocated = {{0x0}}
};
void _POSIX_Threads_Sporadic_timer( Watchdog_Control *watchdog )
{
POSIX_API_Control *api;
Thread_Control *the_thread;
Thread_queue_Context queue_context;
api = RTEMS_CONTAINER_OF( watchdog, POSIX_API_Control, Sporadic.Timer );
the_thread = api->thread;
_Thread_queue_Context_initialize( &queue_context );
_Thread_queue_Context_clear_priority_updates( &queue_context );
_Thread_Wait_acquire( the_thread, &queue_context );
if ( _Priority_Node_is_active( &api->Sporadic.Low_priority ) ) {
_Thread_Priority_add(
the_thread,
&the_thread->Real_priority,
&queue_context
);
_Thread_Priority_remove(
the_thread,
&api->Sporadic.Low_priority,
&queue_context
);
_Priority_Node_set_inactive( &api->Sporadic.Low_priority );
}
_Watchdog_Per_CPU_remove_relative( &api->Sporadic.Timer );
_POSIX_Threads_Sporadic_timer_insert( the_thread, api );
_Thread_Wait_release( the_thread, &queue_context );
_Thread_Priority_update( &queue_context );
}
void _POSIX_Threads_Sporadic_budget_callout( Thread_Control *the_thread )
{
POSIX_API_Control *api;
Thread_queue_Context queue_context;
api = the_thread->API_Extensions[ THREAD_API_POSIX ];
_Thread_queue_Context_initialize( &queue_context );
_Thread_queue_Context_clear_priority_updates( &queue_context );
_Thread_Wait_acquire( the_thread, &queue_context );
/*
* This will prevent the thread from consuming its entire "budget"
* while at low priority.
*/
the_thread->cpu_time_budget = UINT32_MAX;
if ( !_Priority_Node_is_active( &api->Sporadic.Low_priority ) ) {
_Thread_Priority_add(
the_thread,
&api->Sporadic.Low_priority,
&queue_context
);
_Thread_Priority_remove(
the_thread,
&the_thread->Real_priority,
&queue_context
);
}
_Thread_Wait_release( the_thread, &queue_context );
_Thread_Priority_update( &queue_context );
}
/*
* _POSIX_Threads_Create_extension
*
* This method is invoked for each thread created.
*/
static bool _POSIX_Threads_Create_extension(
Thread_Control *executing RTEMS_UNUSED,
Thread_Control *created
)
{
POSIX_API_Control *api;
POSIX_API_Control *executing_api;
api = created->API_Extensions[ THREAD_API_POSIX ];
/* XXX check all fields are touched */
api->thread = created;
_POSIX_Threads_Initialize_attributes( &api->Attributes );
api->Attributes.schedparam.sched_priority = _POSIX_Priority_From_core(
_Thread_Scheduler_get_home( created ),
_Thread_Get_priority( created )
);
/*
* If the thread is not a posix thread, then all posix signals are blocked
* by default.
*
* The check for class == 1 is debug. Should never really happen.
*/
RTEMS_STATIC_ASSERT( SIGNAL_EMPTY_MASK == 0, signals_pending );
if ( _Objects_Get_API( created->Object.id ) == OBJECTS_POSIX_API
#if defined(RTEMS_DEBUG)
&& _Objects_Get_class( created->Object.id ) == 1
#endif
) {
executing_api = _Thread_Get_executing()->API_Extensions[ THREAD_API_POSIX ];
api->signals_unblocked = executing_api->signals_unblocked;
}
_Watchdog_Preinitialize( &api->Sporadic.Timer, _Per_CPU_Get_by_index( 0 ) );
_Watchdog_Initialize( &api->Sporadic.Timer, _POSIX_Threads_Sporadic_timer );
return true;
}
static void _POSIX_Threads_Terminate_extension( Thread_Control *executing )
{
POSIX_API_Control *api;
ISR_lock_Context lock_context;
api = executing->API_Extensions[ THREAD_API_POSIX ];
_Thread_State_acquire( executing, &lock_context );
if ( api->Attributes.schedpolicy == SCHED_SPORADIC ) {
_Watchdog_Per_CPU_remove_relative( &api->Sporadic.Timer );
}
_Thread_State_release( executing, &lock_context );
}
/*
* _POSIX_Threads_Exitted_extension
*
* This method is invoked each time a thread exits.
*/
static void _POSIX_Threads_Exitted_extension(
Thread_Control *executing
)
{
/*
* If the executing thread was not created with the POSIX API, then this
* API do not get to define its exit behavior.
*/
if ( _Objects_Get_API( executing->Object.id ) == OBJECTS_POSIX_API )
pthread_exit( executing->Wait.return_argument );
}
User_extensions_Control _POSIX_Threads_User_extensions = {
.Callouts = {
.thread_create = _POSIX_Threads_Create_extension,
.thread_exitted = _POSIX_Threads_Exitted_extension,
.thread_terminate = _POSIX_Threads_Terminate_extension
}
};
/*
* _POSIX_Threads_Manager_initialization
*
* This routine initializes all threads manager related data structures.
*/
static void _POSIX_Threads_Manager_initialization(void)
{
#if defined(RTEMS_SMP)
const CPU_set_Control *affinity;
pthread_attr_t *attr;
/* Initialize default attribute. */
attr = &_POSIX_Threads_Default_attributes;
/* Initialize the affinity to be the default cpu set for the system */
affinity = _CPU_set_Default();
_Assert( affinity->setsize == sizeof( attr->affinitysetpreallocated ) );
attr->affinityset = &attr->affinitysetpreallocated;
attr->affinitysetsize = affinity->setsize;
CPU_COPY( attr->affinityset, affinity->set );
#endif
_Thread_Initialize_information(
&_POSIX_Threads_Information, /* object information table */
OBJECTS_POSIX_API, /* object API */
OBJECTS_POSIX_THREADS, /* object class */
Configuration_POSIX_API.maximum_threads,
/* maximum objects of this class */
true, /* true if names for this object are strings */
_POSIX_PATH_MAX /* maximum length of each object's name */
);
/*
* Add all the extensions for this API
*/
_User_extensions_Add_API_set( &_POSIX_Threads_User_extensions );
/*
* If we supported MP, then here we would ...
* Register the MP Process Packet routine.
*/
}
RTEMS_SYSINIT_ITEM(
_POSIX_Threads_Manager_initialization,
RTEMS_SYSINIT_POSIX_THREADS,
RTEMS_SYSINIT_ORDER_MIDDLE
);
