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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2013 Olaf Wintermann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdio.h>
#include <stdlib.h>

#include <ucx/map.h>

#include "threadpools.h"


UcxMap *thread_pool_map = NULL;
int numthrpools = 0;

threadpool_t *default_thread_pool = NULL;

threadpool_t *last_thrpool_c = NULL;

int create_threadpool(sstr_t name, ThreadPoolConfig *cfg) { 
    if(thread_pool_map == NULL) {
        thread_pool_map = ucx_map_new(16);
    }
    
    threadpool_t *pool = ucx_map_sstr_get(thread_pool_map, name);
    if(pool) {
        if(pool->min_threads > cfg->max_threads) {
            pool->min_threads = cfg->min_threads;
            pool->max_threads = cfg->max_threads;
        } else {
            pool->max_threads = cfg->max_threads;
            pool->min_threads = cfg->min_threads;
        }
        return 0;
    } else {
        threadpool_t *tp = threadpool_new(cfg->min_threads, cfg->max_threads);
        
        int ret = ucx_map_sstr_put(thread_pool_map, name, tp);
        
        if(ret == 0) {
            numthrpools++;
            last_thrpool_c = tp;
        }
        
        return ret;
    }
}

int check_thread_pool_cfg() {
    if(numthrpools > 0 ) {
        if(default_thread_pool) {
            return 0;
        } else {
            default_thread_pool = last_thrpool_c;
            return 0;
        }
    }
    
    ThreadPoolConfig cfg;
    cfg.min_threads = 4;
    cfg.max_threads = 8;
    cfg.queue_size = 64;
    cfg.stack_size = 262144;
    
    return create_threadpool(sstr("default"), &cfg);
}

threadpool_t* get_default_threadpool() {
    return default_thread_pool;
}

threadpool_t* get_threadpool(sstr_t name) {
    return ucx_map_sstr_get(thread_pool_map, name);
}