godot/drivers/metal/metal_utils.h

/**************************************************************************/
/*  metal_utils.h                                                         */
/**************************************************************************/
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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#ifndef METAL_UTILS_H
#define METAL_UTILS_H

#pragma mark - Boolean flags

namespace flags {

/*! Sets the flags within the value parameter specified by the mask parameter. */
template <typename Tv, typename Tm>
void set(Tv &p_value, Tm p_mask) {
	using T = std::underlying_type_t<Tv>;
	p_value = static_cast<Tv>(static_cast<T>(p_value) | static_cast<T>(p_mask));
}

/*! Clears the flags within the value parameter specified by the mask parameter. */
template <typename Tv, typename Tm>
void clear(Tv &p_value, Tm p_mask) {
	using T = std::underlying_type_t<Tv>;
	p_value = static_cast<Tv>(static_cast<T>(p_value) & ~static_cast<T>(p_mask));
}

/*! Returns whether the specified value has any of the bits specified in mask set to 1. */
template <typename Tv, typename Tm>
static constexpr bool any(Tv p_value, const Tm p_mask) { return ((p_value & p_mask) != 0); }

/*! Returns whether the specified value has all of the bits specified in mask set to 1. */
template <typename Tv, typename Tm>
static constexpr bool all(Tv p_value, const Tm p_mask) { return ((p_value & p_mask) == p_mask); }

} //namespace flags

#pragma mark - Alignment and Offsets

static constexpr bool is_power_of_two(uint64_t p_value) {
	return p_value && ((p_value & (p_value - 1)) == 0);
}

static constexpr uint64_t round_up_to_alignment(uint64_t p_value, uint64_t p_alignment) {
	DEV_ASSERT(is_power_of_two(p_alignment));

	if (p_alignment == 0) {
		return p_value;
	}

	uint64_t mask = p_alignment - 1;
	uint64_t aligned_value = (p_value + mask) & ~mask;

	return aligned_value;
}

#endif // METAL_UTILS_H