comp_frame.h

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// Copyright 2022-2023, Collabora, Ltd.
// SPDX-License-Identifier: BSL-1.0
/*!
 * @file
 * @brief  Small helper functions to manage frames.
 * @author Jakob Bornecrantz <jakob@collabora.com>
 * @ingroup comp_main
 */
 
#pragma once
 
#include "main/comp_compositor.h"
 
 
/*!
 * Is this frame invalid.
 */
static inline bool
comp_frame_is_invalid_locked(struct comp_frame *f)
{
        return f->id == -1;
}
 
/*!
 * Clear a slot, need to be externally synchronized.
 */
static inline void
comp_frame_clear_locked(struct comp_frame *slot)
{
        U_ZERO(slot);
        slot->id = -1;
}
 
/*!
 * Move a frame into a cleared frame, need to be externally synchronized.
 */
static inline void
comp_frame_move_into_cleared(struct comp_frame *dst, struct comp_frame *src)
{
        assert(comp_frame_is_invalid_locked(dst));
 
        // Copy data.
        *dst = *src;
 
        U_ZERO(src);
        src->id = -1;
}
 
/*!
 * Move a frame, clear src, need to be externally synchronized.
 */
static inline void
comp_frame_move_and_clear_locked(struct comp_frame *dst, struct comp_frame *src)
{
        comp_frame_clear_locked(dst);
        comp_frame_move_into_cleared(dst, src);
}