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/**
* @file
*
* @ingroup ScoreUserExt
*
* @brief User Extension Handler implementation.
*/
/*
* COPYRIGHT (c) 1989-2008.
* 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.com/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/config.h>
#include <rtems/score/userext.h>
#include <rtems/score/wkspace.h>
CHAIN_DEFINE_EMPTY( _User_extensions_Switches_list );
typedef struct {
User_extensions_Switch_control *switch_control;
} User_extensions_Switch_context;
static void _User_extensions_Switch_visitor(
Thread_Control *executing,
void *arg,
const User_extensions_Table *callouts
)
{
User_extensions_thread_switch_extension callout = callouts->thread_switch;
if ( callout != NULL ) {
User_extensions_Switch_context *ctx = arg;
User_extensions_Switch_control *ctrl = ctx->switch_control;
_Chain_Append_unprotected( &_User_extensions_Switches_list, &ctrl->Node );
ctrl->thread_switch = callout;
ctx->switch_control = ctrl + 1;
}
}
void _User_extensions_Handler_initialization(void)
{
uint32_t number_of_initial_extensions =
rtems_configuration_get_number_of_initial_extensions();
if ( number_of_initial_extensions > 0 ) {
User_extensions_Switch_control *initial_extension_switch_controls =
_Workspace_Allocate_or_fatal_error(
number_of_initial_extensions
* sizeof( *initial_extension_switch_controls )
);
User_extensions_Switch_context ctx = { initial_extension_switch_controls };
_User_extensions_Iterate( &ctx, _User_extensions_Switch_visitor );
}
}
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