#include <rtthread.h>
#include "pthread.h"
#include "sched.h"
#include <string.h>

#define DEFAULT_STACK_SIZE	2048
#define DEFAULT_PRIORITY	(RT_THREAD_PRIORITY_MAX/2 + RT_THREAD_PRIORITY_MAX/4)

const pthread_attr_t pthread_default_attr = 
{
	0,							/* stack base */
	DEFAULT_STACK_SIZE,			/* stack size */
	DEFAULT_PRIORITY,			/* priority */
	PTHREAD_CREATE_JOINABLE,	/* detach state */
	SCHED_FIFO,					/* scheduler policy */
	PTHREAD_INHERIT_SCHED		/* Inherit parent prio/policy */
};

int pthread_attr_init(pthread_attr_t *attr)
{
	RT_ASSERT(attr != RT_NULL);

	*attr = pthread_default_attr;

	return 0;
}
RTM_EXPORT(pthread_attr_init);

int pthread_attr_destroy(pthread_attr_t *attr)
{
	RT_ASSERT(attr != RT_NULL);

	memset(attr, 0, sizeof(pthread_attr_t));
	return 0;
}
RTM_EXPORT(pthread_attr_destroy);

int pthread_attr_setdetachstate(pthread_attr_t * attr, int state)
{
	RT_ASSERT(attr != RT_NULL);

	if (state != PTHREAD_CREATE_JOINABLE && state != PTHREAD_CREATE_DETACHED)
		return EINVAL;

	attr->detachstate = state;
	return 0;
}
RTM_EXPORT(pthread_attr_setdetachstate);

int pthread_attr_getdetachstate(pthread_attr_t const * attr, int *state)
{
	RT_ASSERT(attr != RT_NULL);

	*state = (int)attr->detachstate;

	return 0;
}
RTM_EXPORT(pthread_attr_getdetachstate);

int pthread_attr_setschedpolicy(pthread_attr_t * attr, int policy)
{
	RT_ASSERT(attr != RT_NULL);

	attr->policy = policy;
	return 0;
}
RTM_EXPORT(pthread_attr_setschedpolicy);

int pthread_attr_getschedpolicy(pthread_attr_t const *attr, int *policy)
{
	RT_ASSERT(attr != RT_NULL);

	*policy = (int)attr->policy;
	return 0;
}
RTM_EXPORT(pthread_attr_getschedpolicy);

int pthread_attr_setschedparam(pthread_attr_t *attr, struct sched_param const *param)
{
	RT_ASSERT(attr != RT_NULL);
	RT_ASSERT(param != RT_NULL);

	attr->priority = param->sched_priority;
	return 0;
}
RTM_EXPORT(pthread_attr_setschedparam);

int pthread_attr_getschedparam(pthread_attr_t const *attr, struct sched_param *param)
{
	RT_ASSERT(attr != RT_NULL);
	RT_ASSERT(param != RT_NULL);

	param->sched_priority = attr->priority;
	return 0;
}
RTM_EXPORT(pthread_attr_getschedparam);

int pthread_attr_setstacksize(pthread_attr_t * attr, size_t stack_size)
{
	RT_ASSERT(attr != RT_NULL);

	attr->stack_size = stack_size;
	return 0;
}
RTM_EXPORT(pthread_attr_setstacksize);

int pthread_attr_getstacksize(pthread_attr_t const * attr, size_t *stack_size)
{
	RT_ASSERT(attr != RT_NULL);

	*stack_size = attr->stack_size;
	return 0;
}
RTM_EXPORT(pthread_attr_getstacksize);

int pthread_attr_setstackaddr(pthread_attr_t * attr, void * stack_addr)
{
	RT_ASSERT(attr != RT_NULL);
	return ENOTSUP;
}
RTM_EXPORT(pthread_attr_setstackaddr);

int pthread_attr_getstackaddr(pthread_attr_t const * attr, void ** stack_addr)
{
	RT_ASSERT(attr != RT_NULL);
	return ENOTSUP;
}
RTM_EXPORT(pthread_attr_getstackaddr);

int pthread_attr_setstack(pthread_attr_t * attr, void *stack_base, size_t stack_size)
{
	RT_ASSERT(attr != RT_NULL);

	attr->stack_base = stack_base;
	attr->stack_size = RT_ALIGN_DOWN(stack_size, RT_ALIGN_SIZE);

	return 0;
}
RTM_EXPORT(pthread_attr_setstack);

int pthread_attr_getstack(pthread_attr_t const * attr, void **stack_base, size_t *stack_size)
{
	RT_ASSERT(attr != RT_NULL);

	*stack_base = attr->stack_base;
	*stack_size = attr->stack_size;

	return 0;
}
RTM_EXPORT(pthread_attr_getstack);

int pthread_attr_setguardsize(pthread_attr_t * attr, size_t guard_size)
{
	return ENOTSUP;
}

int pthread_attr_getguardsize(pthread_attr_t const * attr, size_t *guard_size)
{
	return ENOTSUP;
}
RTM_EXPORT(pthread_attr_getguardsize);

int pthread_attr_setscope(pthread_attr_t *attr, int scope)
{
    if (scope == PTHREAD_SCOPE_SYSTEM)
        return 0;
    if (scope == PTHREAD_SCOPE_PROCESS)
        return ENOTSUP;

    return EINVAL;
}
RTM_EXPORT(pthread_attr_setscope);

int pthread_attr_getscope(pthread_attr_t const *attr)
{
    return PTHREAD_SCOPE_SYSTEM;
}
RTM_EXPORT(pthread_attr_getscope);