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2024-07-02 18:13:47 +02:00
commit bbeaa887cd
173 changed files with 34365 additions and 0 deletions
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+///////////////////////////////////////////////////////////////////////////////
+// Copyright (c) Lewis Baker
+// Licenced under MIT license. See LICENSE.txt for details.
+///////////////////////////////////////////////////////////////////////////////
+
+#include <cppcoro/cancellation_token.hpp>
+#include <cppcoro/operation_cancelled.hpp>
+
+#include "cancellation_state.hpp"
+
+#include <utility>
+#include <cassert>
+
+cppcoro::cancellation_token::cancellation_token() noexcept
+	: m_state(nullptr)
+{
+}
+
+cppcoro::cancellation_token::cancellation_token(const cancellation_token& other) noexcept
+	: m_state(other.m_state)
+{
+	if (m_state != nullptr)
+	{
+		m_state->add_token_ref();
+	}
+}
+
+cppcoro::cancellation_token::cancellation_token(cancellation_token&& other) noexcept
+	: m_state(other.m_state)
+{
+	other.m_state = nullptr;
+}
+
+cppcoro::cancellation_token::~cancellation_token()
+{
+	if (m_state != nullptr)
+	{
+		m_state->release_token_ref();
+	}
+}
+
+cppcoro::cancellation_token& cppcoro::cancellation_token::operator=(const cancellation_token& other) noexcept
+{
+	if (other.m_state != m_state)
+	{
+		if (m_state != nullptr)
+		{
+			m_state->release_token_ref();
+		}
+
+		m_state = other.m_state;
+
+		if (m_state != nullptr)
+		{
+			m_state->add_token_ref();
+		}
+	}
+
+	return *this;
+}
+
+cppcoro::cancellation_token& cppcoro::cancellation_token::operator=(cancellation_token&& other) noexcept
+{
+	if (this != &other)
+	{
+		if (m_state != nullptr)
+		{
+			m_state->release_token_ref();
+		}
+
+		m_state = other.m_state;
+		other.m_state = nullptr;
+	}
+
+	return *this;
+}
+
+void cppcoro::cancellation_token::swap(cancellation_token& other) noexcept
+{
+	std::swap(m_state, other.m_state);
+}
+
+bool cppcoro::cancellation_token::can_be_cancelled() const noexcept
+{
+	return m_state != nullptr && m_state->can_be_cancelled();
+}
+
+bool cppcoro::cancellation_token::is_cancellation_requested() const noexcept
+{
+	return m_state != nullptr && m_state->is_cancellation_requested();
+}
+
+void cppcoro::cancellation_token::throw_if_cancellation_requested() const
+{
+	if (is_cancellation_requested())
+	{
+		throw operation_cancelled{};
+	}
+}
+
+cppcoro::cancellation_token::cancellation_token(detail::cancellation_state* state) noexcept
+	: m_state(state)
+{
+	if (m_state != nullptr)
+	{
+		m_state->add_token_ref();
+	}
+}