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NamedPtr provides reference-counted handles to named objects. The object is created the first time the associated name is used, and stored under the associated name until the last handle is destroyed. NamedPtr may itself be destroyed while handles are still active. This template is intended to replace ResourceHandle with a more general and less invasive implementation. Signed-off-by: Zygo Blaxell <bees@furryterror.org>
85 lines
1.8 KiB
C++
85 lines
1.8 KiB
C++
#include "tests.h"
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#include "crucible/error.h"
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#include "crucible/namedptr.h"
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#include <cassert>
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#include <set>
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using namespace crucible;
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struct named_thing {
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static set<named_thing*> s_set;
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int m_a, m_b;
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named_thing() = delete;
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named_thing(const named_thing &that) :
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m_a(that.m_a),
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m_b(that.m_b)
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{
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cerr << "named_thing(" << m_a << ", " << m_b << ") " << this << " copied from " << &that << "." << endl;
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auto rv = s_set.insert(this);
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THROW_CHECK1(runtime_error, *rv.first, rv.second);
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}
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named_thing(int a, int b) :
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m_a(a), m_b(b)
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{
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cerr << "named_thing(" << a << ", " << b << ") " << this << " constructed." << endl;
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auto rv = s_set.insert(this);
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THROW_CHECK1(runtime_error, *rv.first, rv.second);
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}
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~named_thing() {
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auto rv = s_set.erase(this);
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assert(rv == 1);
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cerr << "named_thing(" << m_a << ", " << m_b << ") " << this << " destroyed." << endl;
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m_a = ~m_a;
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m_b = ~m_b;
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}
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void check(int a, int b) {
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THROW_CHECK2(runtime_error, m_a, a, m_a == a);
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THROW_CHECK2(runtime_error, m_b, b, m_b == b);
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}
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static void check_empty() {
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THROW_CHECK1(runtime_error, s_set.size(), s_set.empty());
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}
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};
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set<named_thing*> named_thing::s_set;
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static
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void
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test_namedptr()
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{
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NamedPtr<named_thing, int, int> names;
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names.func([](int a, int b) -> shared_ptr<named_thing> { return make_shared<named_thing>(a, b); });
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auto a_3_5 = names(3, 5);
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auto b_3_5 = names(3, 5);
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{
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auto c_2_7 = names(2, 7);
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b_3_5 = a_3_5;
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a_3_5->check(3, 5);
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b_3_5->check(3, 5);
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c_2_7->check(2, 7);
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}
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auto d_2_7 = names(2, 7);
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a_3_5->check(3, 5);
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a_3_5.reset();
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b_3_5->check(3, 5);
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d_2_7->check(2, 7);
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}
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static
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void
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test_leak()
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{
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named_thing::check_empty();
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}
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int
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main(int, char**)
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{
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RUN_A_TEST(test_namedptr());
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RUN_A_TEST(test_leak());
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exit(EXIT_SUCCESS);
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}
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