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/*
 * Copyright (c) 2023 Egor Tensin <egor@tensin.name>
 * This file is part of the "cimple" project.
 * For details, see https://github.com/egor-tensin/cimple
 * Distributed under the MIT License.
 */

#include "worker_queue.h"

#include "log.h"
#include "net.h"

#include <stdlib.h>
#include <sys/queue.h>

struct worker {
    int fd;
    SIMPLEQ_ENTRY(worker) entries;
};

int worker_create(struct worker** _entry, int fd) {
    struct worker* entry = malloc(sizeof(struct worker));
    if (!entry) {
        log_errno("malloc");
        return -1;
    }

    entry->fd = fd;

    *_entry = entry;
    return 0;
}

void worker_destroy(struct worker* entry) {
    net_close(entry->fd);
    free(entry);
}

int worker_get_fd(const struct worker* entry) {
    return entry->fd;
}

void worker_queue_create(struct worker_queue* queue) {
    SIMPLEQ_INIT(queue);
}

void worker_queue_destroy(struct worker_queue* queue) {
    struct worker* entry1 = SIMPLEQ_FIRST(queue);
    while (entry1) {
        struct worker* entry2 = SIMPLEQ_NEXT(entry1, entries);
        worker_destroy(entry1);
        entry1 = entry2;
    }
    SIMPLEQ_INIT(queue);
}

int worker_queue_is_empty(const struct worker_queue* queue) {
    return SIMPLEQ_EMPTY(queue);
}

void worker_queue_add_first(struct worker_queue* queue, struct worker* entry) {
    SIMPLEQ_INSERT_HEAD(queue, entry, entries);
}

void worker_queue_add_last(struct worker_queue* queue, struct worker* entry) {
    SIMPLEQ_INSERT_TAIL(queue, entry, entries);
}

struct worker* worker_queue_remove_first(struct worker_queue* queue) {
    struct worker* entry = SIMPLEQ_FIRST(queue);
    SIMPLEQ_REMOVE_HEAD(queue, entries);
    return entry;
}