84 lines
2.5 KiB
C++
84 lines
2.5 KiB
C++
#pragma once
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#include <glacier/container/intrusive_list.h>
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#include <glacier/container/linked_list.h>
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#include <glacier/memory/ref_ptr.h>
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#include <glacier/memory/shared_ptr.h>
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#include <glacier/status/error.h>
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#include "capability/capability.h"
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#include "include/ztypes.h"
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#include "lib/mutex.h"
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class MessageQueue {
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public:
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virtual ~MessageQueue() {}
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virtual glcr::ErrorCode PushBack(uint64_t num_bytes, const void* bytes,
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uint64_t num_caps, const z_cap_t* caps) = 0;
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virtual glcr::ErrorCode PopFront(uint64_t* num_bytes, void* bytes,
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uint64_t* num_caps, z_cap_t* caps) = 0;
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virtual bool empty() = 0;
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protected:
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Mutex mutex_{"message"};
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// FIXME: This maybe shouldn't be shared between classes since the
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// SingleMessageQueue should only ever have one blocked thread.
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glcr::IntrusiveList<Thread> blocked_threads_;
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};
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class UnboundedMessageQueue : public MessageQueue {
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public:
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UnboundedMessageQueue() {}
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UnboundedMessageQueue(const UnboundedMessageQueue&) = delete;
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UnboundedMessageQueue& operator=(const UnboundedMessageQueue&) = delete;
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virtual ~UnboundedMessageQueue() override {}
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glcr::ErrorCode PushBack(uint64_t num_bytes, const void* bytes,
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uint64_t num_caps, const z_cap_t* caps) override;
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glcr::ErrorCode PopFront(uint64_t* num_bytes, void* bytes, uint64_t* num_caps,
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z_cap_t* caps) override;
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void WriteKernel(uint64_t init, glcr::RefPtr<Capability> cap);
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bool empty() override {
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MutexHolder h(mutex_);
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return pending_messages_.size() == 0;
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}
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private:
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struct Message {
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uint64_t num_bytes;
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uint8_t* bytes;
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glcr::LinkedList<glcr::RefPtr<Capability>> caps;
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};
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glcr::LinkedList<glcr::SharedPtr<Message>> pending_messages_;
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};
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class SingleMessageQueue : public MessageQueue {
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public:
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SingleMessageQueue() {}
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SingleMessageQueue(const SingleMessageQueue&) = delete;
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SingleMessageQueue(SingleMessageQueue&&) = delete;
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virtual ~SingleMessageQueue() override {}
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glcr::ErrorCode PushBack(uint64_t num_bytes, const void* bytes,
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uint64_t num_caps, const z_cap_t* caps) override;
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glcr::ErrorCode PopFront(uint64_t* num_bytes, void* bytes, uint64_t* num_caps,
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z_cap_t* caps) override;
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bool empty() override {
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MutexHolder h(mutex_);
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return has_written_ == false;
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};
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private:
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bool has_written_ = false;
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bool has_read_ = false;
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uint64_t num_bytes_;
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uint8_t* bytes_;
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glcr::LinkedList<glcr::RefPtr<Capability>> caps_;
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};
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