49 lines
1.3 KiB
C++
49 lines
1.3 KiB
C++
#pragma once
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#include "capability/capability.h"
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#include "include/ztypes.h"
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#include "lib/linked_list.h"
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#include "lib/message_queue.h"
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#include "lib/mutex.h"
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#include "lib/pair.h"
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#include "lib/ref_ptr.h"
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#include "object/kernel_object.h"
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#include "usr/zcall_internal.h"
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class Channel;
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template <>
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struct KernelObjectTag<Channel> {
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static const uint64_t type = KernelObject::CHANNEL;
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};
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class Channel : public KernelObject {
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public:
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uint64_t TypeTag() override { return KernelObject::CHANNEL; }
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static Pair<RefPtr<Channel>, RefPtr<Channel>> CreateChannelPair();
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RefPtr<Channel> peer() { return peer_; }
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z_err_t Write(uint64_t num_bytes, const void* bytes, uint64_t num_caps,
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const z_cap_t* caps);
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z_err_t Read(uint64_t* num_bytes, void* bytes, uint64_t* num_caps,
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z_cap_t* caps);
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private:
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// FIXME: We will likely never close the channel based on this
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// circular dependency.
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RefPtr<Channel> peer_{nullptr};
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Mutex mutex_{"channel"};
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UnboundedMessageQueue message_queue_;
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LinkedList<RefPtr<Thread>> blocked_threads_;
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friend class MakeRefCountedFriend<Channel>;
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Channel() {}
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void SetPeer(const RefPtr<Channel>& peer) { peer_ = peer; }
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z_err_t WriteInternal(uint64_t num_bytes, const void* bytes,
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uint64_t num_caps, const z_cap_t* caps);
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};
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