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https://github.com/justinian/jsix.git
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Justin C. Miller
d4283731e4
Added the syscalls/helpers.h file to templatize common kobject syscall operations. Also moved most syscall implementations to using process::current() and thread::current() instead of asking the scheduler.
53 lines
1.6 KiB
C++
53 lines
1.6 KiB
C++
#pragma once
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/// \file channel.h
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/// Definition of channel objects and related functions
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#include "j6/signals.h"
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#include "kutil/bip_buffer.h"
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#include "objects/kobject.h"
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/// Channels are bi-directional means of sending messages
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class channel :
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public kobject
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{
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public:
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channel();
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virtual ~channel();
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static constexpr kobject::type type = kobject::type::channel;
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/// Check if the channel has space for a message to be sent
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inline bool can_send() const { return check_signal(j6_signal_channel_can_send); }
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/// Check if the channel has a message wiating already
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inline bool can_receive() const { return check_signal(j6_signal_channel_can_recv); }
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/// Put a message into the channel
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/// \arg len [in] Bytes in data buffer [out] number of bytes written
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/// \arg data Pointer to the message data
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/// \returns j6_status_ok on success
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j6_status_t enqueue(size_t *len, const void *data);
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/// Get a message from the channel, copied into a provided buffer
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/// \arg len On input, the size of the provided buffer. On output,
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/// the size of the message copied into the buffer.
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/// \arg data Pointer to the buffer
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/// \returns j6_status_ok on success
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j6_status_t dequeue(size_t *len, void *data);
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/// Mark this channel as closed, all future calls to enqueue or
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/// dequeue messages will fail with j6_status_closed.
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void close();
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/// Check if this channel has been closed
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inline bool closed() { return check_signal(j6_signal_channel_closed); }
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protected:
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virtual void on_no_handles() override;
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private:
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size_t m_len;
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uintptr_t m_data;
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kutil::bip_buffer m_buffer;
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};
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