/*
 * Copyright (c) 2003-2004 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code 
 * as defined in and that are subject to the Apple Public Source License 
 * Version 2.0 (the 'License'). You may not use this file except in 
 * compliance with the License.  The rights granted to you under the 
 * License may not be used to create, or enable the creation or 
 * redistribution of, unlawful or unlicensed copies of an Apple operating 
 * system, or to circumvent, violate, or enable the circumvention or 
 * violation of, any terms of an Apple operating system software license 
 * agreement.
 *
 * Please obtain a copy of the License at 
 * http://www.opensource.apple.com/apsl/ and read it before using this 
 * file.
 *
 * The Original Code and all software distributed under the License are 
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
 * Please see the License for the specific language governing rights and 
 * limitations under the License.
 *
 * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
 */

#include <stdint.h>
#include <mach/boolean.h>
#include <mach/mach_types.h>

#include <kern/kern_types.h>
#include <kern/processor.h>
#include <kern/timer_call.h>
#include <kern/thread_call.h>
#include <kern/kalloc.h>
#include <kern/thread.h>

#include <machine/machine_routines.h>
#include <machine/cpu_data.h>

#include <chud/chud_xnu.h>
#include <chud/chud_xnu_private.h>

#pragma mark **** timer ****
__private_extern__ chud_timer_t
chudxnu_timer_alloc(chudxnu_timer_callback_func_t func, uint32_t param0)
{
    return (chud_timer_t)thread_call_allocate((thread_call_func_t)func, (thread_call_param_t)param0);
}

__private_extern__ kern_return_t
chudxnu_timer_callback_enter(
	chud_timer_t timer,
	uint32_t param1,
	uint32_t time,
	uint32_t units)
{
    uint64_t t_delay;
    clock_interval_to_deadline(time, units, &t_delay);
    thread_call_enter1_delayed((thread_call_t)timer, (thread_call_param_t)param1, t_delay);
    return KERN_SUCCESS;
}

__private_extern__ kern_return_t
chudxnu_timer_callback_cancel(chud_timer_t timer)
{
    thread_call_cancel((thread_call_t)timer);
    return KERN_SUCCESS;
}

__private_extern__ kern_return_t
chudxnu_timer_free(chud_timer_t timer)
{
    thread_call_cancel((thread_call_t)timer);
    thread_call_free((thread_call_t)timer);
    return KERN_SUCCESS;
}

#pragma mark **** thread timer - DEPRECATED ****

static thread_call_t thread_timer_call = NULL;
static chudxnu_thread_timer_callback_func_t thread_timer_callback_fn = NULL;

static void chudxnu_private_thread_timer_callback(
		thread_call_param_t param0,
		thread_call_param_t param1)
{
#pragma unused (param1)
    chudxnu_thread_timer_callback_func_t fn = thread_timer_callback_fn;
    
    if(thread_timer_call) {
        thread_call_free(thread_timer_call);
        thread_timer_call = NULL;

        if(fn) {
            (fn)((uint32_t)param0);
        }
    }
}

// DEPRECATED
__private_extern__
kern_return_t chudxnu_thread_timer_callback_enter(
		chudxnu_thread_timer_callback_func_t func,
		uint32_t param,
		uint32_t time,
		uint32_t units)
{
    if(!thread_timer_call) {
        uint64_t t_delay;
        thread_timer_callback_fn = func;

        thread_timer_call = thread_call_allocate(
				(thread_call_func_t)
					chudxnu_private_thread_timer_callback,
				(thread_call_param_t)
					param);
        clock_interval_to_deadline(time, units, &t_delay);
        thread_call_enter_delayed(thread_timer_call, t_delay);
        return KERN_SUCCESS;
    } else {
        return KERN_FAILURE; // thread timer call already pending
    }
}

// DEPRECATED
__private_extern__
kern_return_t chudxnu_thread_timer_callback_cancel(void)
{
    if(thread_timer_call) {
    	thread_call_cancel(thread_timer_call);
        thread_call_free(thread_timer_call);
        thread_timer_call = NULL;
    }
    thread_timer_callback_fn = NULL;
    return KERN_SUCCESS;
}