rt-thread-official/components/init/components.c

/*
 * File      : components.c
 * This file is part of RT-Thread RTOS
 * COPYRIGHT (C) 2012, RT-Thread Development Team
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://www.rt-thread.org/license/LICENSE
 *
 * Change Logs:
 * Date           Author       Notes
 * 2012-09-20     Bernard      Change the name to components.c
 *                             And all components related header files.
 * 2012-12-23     Bernard      fix the pthread initialization issue.
 * 2013-06-23     Bernard      Add the init_call for components initialization.
 */

#include "components.h"

static int rti_start(void)
{
	return 0;
}
INIT_EXPORT(rti_start, "0");

static int rti_board_end(void)
{
	return 0;
}
INIT_EXPORT(rti_board_end, "1.post");

static int rti_end(void)
{
	return 0;
}
INIT_EXPORT(rti_end,"7");

#if defined(_MSC_VER) || (defined(__GNUC__) && defined(__x86_64__))
/* fixed for MSC_VC and x86_64 in GNU GCC */
#define NEXT_COMPONENT_FN(fn_ptr, end)  fn_ptr = _next_component_fn(fn_ptr, end)

const init_fn_t* _next_component_fn(const init_fn_t* fn, const init_fn_t* end)
{
	unsigned int *ptr;
	ptr = (unsigned int*) (fn + 1);
	while ((*ptr == 0) && ((unsigned int*)ptr < (unsigned int*)end))
		ptr ++;

	return (const init_fn_t*)ptr;
}
#else
#define NEXT_COMPONENT_FN(fn_ptr, end)  fn_ptr++
#endif

/**
 * RT-Thread Components Initialization for board
 */
void rt_components_board_init(void)
{
	const init_fn_t* fn_ptr;

	for (fn_ptr = &__rt_init_rti_start; fn_ptr < &__rt_init_rti_board_end; )
	{
		(*fn_ptr)();
		NEXT_COMPONENT_FN(fn_ptr, __rt_init_rti_board_end);
	}
}

/**
 * RT-Thread Components Initialization
 */
void rt_components_init(void)
{
	const init_fn_t* fn_ptr;

	for (fn_ptr = &__rt_init_rti_board_end; fn_ptr < &__rt_init_rti_end; )
	{
		(*fn_ptr)();
		NEXT_COMPONENT_FN(fn_ptr, __rt_init_rti_end);
	}
}