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/*
* Copyright (C) 2012-2014 Alec Thomas <alec@swapoff.org>
* All rights reserved.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution.
*
* Author: Alec Thomas <alec@swapoff.org>
*/
#define CATCH_CONFIG_MAIN
#include <vector>
#include "entityx/3rdparty/catch.hpp"
#include "entityx/help/Pool.h"
struct Position {
explicit Position(int *ptr = nullptr) : ptr(ptr) {
if (ptr) (*ptr)++;
}
~Position() {
if (ptr) (*ptr)++;
}
float x, y;
int *ptr;
};
TEST_CASE("TestPoolReserve") {
entityx::Pool<Position, 8> pool;
REQUIRE(0 == pool.capacity());
REQUIRE(0 == pool.chunks());
pool.reserve(8);
REQUIRE(0 == pool.size());
REQUIRE(8 == pool.capacity());
REQUIRE(1 == pool.chunks());
pool.reserve(16);
REQUIRE(0 == pool.size());
REQUIRE(16 == pool.capacity());
REQUIRE(2 == pool.chunks());
}
TEST_CASE("TestPoolPointers") {
entityx::Pool<Position, 8> pool;
std::vector<char*> ptrs;
for (int i = 0; i < 4; i++) {
pool.expand(i * 8 + 8);
// NOTE: This is an attempt to ensure non-contiguous allocations from
// arena allocators.
ptrs.push_back(new char[8 * sizeof(Position)]);
}
char *p0 = static_cast<char*>(pool.get(0));
char *p7 = static_cast<char*>(pool.get(7));
char *p8 = static_cast<char*>(pool.get(8));
char *p16 = static_cast<char*>(pool.get(16));
char *p24 = static_cast<char*>(pool.get(24));
void *expected_p7 = p0 + 7 * sizeof(Position);
REQUIRE(expected_p7 == static_cast<void*>(p7));
void *extrapolated_p8 = p0 + 8 * sizeof(Position);
REQUIRE(extrapolated_p8 != static_cast<void*>(p8));
void *extrapolated_p16 = p8 + 8 * sizeof(Position);
REQUIRE(extrapolated_p16 != static_cast<void*>(p16));
void *extrapolated_p24 = p16 + 8 * sizeof(Position);
REQUIRE(extrapolated_p24 != static_cast<void*>(p24));
}
TEST_CASE("TestDeconstruct") {
entityx::Pool<Position, 8> pool;
pool.expand(8);
void *p0 = pool.get(0);
int counter = 0;
new(p0) Position(&counter);
REQUIRE(1 == counter);
pool.destroy(0);
REQUIRE(2 == counter);
}
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