/*
 * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
 *               2018
 *   Jonathan Schleifer <js@heap.zone>
 *
 * All rights reserved.
 *
 * This file is part of ObjFW. It may be distributed under the terms of the
 * Q Public License 1.0, which can be found in the file LICENSE.QPL included in
 * the packaging of this file.
 *
 * Alternatively, it may be distributed under the terms of the GNU General
 * Public License, either version 2 or 3, which can be found in the file
 * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
 * file.
 */

#include "config.h"

#import "macros.h"

bool
of_thread_attr_init(of_thread_attr_t *attr)
{
	attr->priority = 0;
	attr->stackSize = 0;

	return true;
}

bool
of_thread_new(of_thread_t *thread, void (*function)(id), id object,
    const of_thread_attr_t *attr)
{
	*thread = CreateThread(NULL, (attr != NULL ? attr->stackSize : 0),
	    (LPTHREAD_START_ROUTINE)function, (__bridge void *)object, 0, NULL);

	if (thread == NULL)
		return false;

	if (attr != NULL && attr->priority != 0) {
		DWORD priority;

		if (attr->priority < -1 || attr->priority > 1)
			return false;

		if (attr->priority < 0)
			priority = THREAD_PRIORITY_LOWEST +
			    (1.0 + attr->priority) *
			    (THREAD_PRIORITY_NORMAL - THREAD_PRIORITY_LOWEST);
		else
			priority = THREAD_PRIORITY_NORMAL +
			    attr->priority *
			    (THREAD_PRIORITY_HIGHEST - THREAD_PRIORITY_NORMAL);

		if (!SetThreadPriority(*thread, priority))
			return false;
	}

	return true;
}

bool
of_thread_join(of_thread_t thread)
{
	if (WaitForSingleObject(thread, INFINITE))
		return false;

	CloseHandle(thread);

	return true;
}

bool
of_thread_detach(of_thread_t thread)
{
	/* FIXME */
	return true;
}

void OF_NO_RETURN_FUNC
of_thread_exit(void)
{
	ExitThread(0);

	OF_UNREACHABLE
}

void
of_thread_set_name(const char *name)
{
}

bool
of_tlskey_new(of_tlskey_t *key)
{
	return ((*key = TlsAlloc()) != TLS_OUT_OF_INDEXES);
}

bool
of_tlskey_free(of_tlskey_t key)
{
	return TlsFree(key);
}

bool
of_mutex_new(of_mutex_t *mutex)
{
	InitializeCriticalSection(mutex);

	return true;
}

bool
of_mutex_lock(of_mutex_t *mutex)
{
	EnterCriticalSection(mutex);

	return true;
}

bool
of_mutex_trylock(of_mutex_t *mutex)
{
	return TryEnterCriticalSection(mutex);
}

bool
of_mutex_unlock(of_mutex_t *mutex)
{
	LeaveCriticalSection(mutex);

	return true;
}

bool
of_mutex_free(of_mutex_t *mutex)
{
	DeleteCriticalSection(mutex);

	return true;
}

bool
of_rmutex_new(of_rmutex_t *rmutex)
{
	return of_mutex_new(rmutex);
}

bool
of_rmutex_lock(of_rmutex_t *rmutex)
{
	return of_mutex_lock(rmutex);
}

bool
of_rmutex_trylock(of_rmutex_t *rmutex)
{
	return of_mutex_trylock(rmutex);
}

bool
of_rmutex_unlock(of_rmutex_t *rmutex)
{
	return of_mutex_unlock(rmutex);
}

bool
of_rmutex_free(of_rmutex_t *rmutex)
{
	return of_mutex_free(rmutex);
}

bool
of_condition_new(of_condition_t *condition)
{
	condition->count = 0;

	if ((condition->event = CreateEvent(NULL, FALSE, 0, NULL)) == NULL)
		return false;

	return true;
}

bool
of_condition_signal(of_condition_t *condition)
{
	return SetEvent(condition->event);
}

bool
of_condition_broadcast(of_condition_t *condition)
{
	for (int i = 0; i < condition->count; i++)
		if (!SetEvent(condition->event))
			return false;

	return true;
}

bool
of_condition_wait(of_condition_t *condition, of_mutex_t *mutex)
{
	DWORD status;

	if (!of_mutex_unlock(mutex))
		return false;

	of_atomic_int_inc(&condition->count);
	status = WaitForSingleObject(condition->event, INFINITE);
	of_atomic_int_dec(&condition->count);

	if (!of_mutex_lock(mutex))
		return false;

	return (status == WAIT_OBJECT_0);
}

bool
of_condition_timed_wait(of_condition_t *condition, of_mutex_t *mutex,
    of_time_interval_t timeout)
{
	DWORD status;

	if (!of_mutex_unlock(mutex))
		return false;

	of_atomic_int_inc(&condition->count);
	status = WaitForSingleObject(condition->event, timeout * 1000);
	of_atomic_int_dec(&condition->count);

	if (!of_mutex_lock(mutex))
		return false;

	return (status == WAIT_OBJECT_0);
}

bool
of_condition_free(of_condition_t *condition)
{
	if (condition->count != 0)
		return false;

	return CloseHandle(condition->event);
}