// LEMONBBS MODULES: CONNLIST
// This module allows for storing connection information statically instead of
// allocating on every connection

#include <pthread.h>
#include <memory.h>
#include <stdlib.h>
#include "connlist.h"

pthread_mutex_t connListLock = PTHREAD_MUTEX_INITIALIZER;
struct Connection* connList;
unsigned int connListLength;

void initConnList(unsigned int maxConnCount) {
    size_t allocNeeded = maxConnCount*sizeof(struct Connection);
    connList = malloc(allocNeeded);
    memset(connList, 0, allocNeeded);
    connListLength = maxConnCount;
}

// allocates a new Connection and activates it
struct Connection* allocateConnection() {
    pthread_mutex_lock(&connListLock);
    struct Connection* result = NULL;
    for (int i = 0; i < connListLength; ++i) {
        if (connList[i].state == 0x00) {
            result = connList+i;
            break;
        }
    }
    if (result != NULL) {
        result->state = 0xFF;
    }
    pthread_mutex_unlock(&connListLock);
    return result;
}

// deactivates and deallocates a Connection
void deallocateConnection(struct Connection* connection) {
    pthread_mutex_lock(&connListLock);
    memset(connection, 0, sizeof(struct Connection));
    pthread_mutex_unlock(&connListLock);
}