obs-studio/libobs/util/threading-windows.h

/*
 * Copyright (c) 2015 Hugh Bailey <obs.jim@gmail.com>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#pragma once

#include <intrin.h>

static inline long os_atomic_inc_long(volatile long *val)
{
	return _InterlockedIncrement(val);
}

static inline long os_atomic_dec_long(volatile long *val)
{
	return _InterlockedDecrement(val);
}

static inline long os_atomic_set_long(volatile long *ptr, long val)
{
	return (long)_InterlockedExchange((volatile long *)ptr, (long)val);
}

static inline long os_atomic_load_long(const volatile long *ptr)
{
	return (long)_InterlockedOr((volatile long *)ptr, 0);
}

static inline bool os_atomic_compare_swap_long(volatile long *val, long old_val,
					       long new_val)
{
	return _InterlockedCompareExchange(val, new_val, old_val) == old_val;
}

static inline bool os_atomic_set_bool(volatile bool *ptr, bool val)
{
	return !!_InterlockedExchange8((volatile char *)ptr, (char)val);
}

static inline bool os_atomic_load_bool(const volatile bool *ptr)
{
	return !!_InterlockedOr8((volatile char *)ptr, 0);
}