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/*
* Copyright © 2019 Broadcom
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#ifndef DAG_H
#define DAG_H
#include <stdint.h>
#include "util/list.h"
#include "util/u_dynarray.h"
#ifdef __cplusplus
extern "C" {
#endif
struct dag_edge {
struct dag_node *child;
/* User-defined data associated with the edge. */
void *data;
};
struct dag_node {
/* Position in the DAG heads list (or a self-link) */
struct list_head link;
/* Array struct edge to the children. */
struct util_dynarray edges;
uint32_t parent_count;
};
struct dag {
struct list_head heads;
};
struct dag *dag_create(void *mem_ctx);
void dag_init_node(struct dag *dag, struct dag_node *node);
void dag_add_edge(struct dag_node *parent, struct dag_node *child, void *data);
void dag_remove_edge(struct dag *dag, struct dag_edge *edge);
void dag_traverse_bottom_up(struct dag *dag, void (*cb)(struct dag_node *node,
void *data), void *data);
void dag_prune_head(struct dag *dag, struct dag_node *node);
#ifdef __cplusplus
}
#endif
#endif
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