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cda07b7da0
This commit replaces the stateful 'Ipc_client' type with the plain function 'ipc_call' that takes all the needed state as arguments. The stateful 'Ipc_server' class is retained but it moved from the public API to the internal ipc_server.h header. The kernel-specific implementations were cleaned up and simplified. E.g., the 'wait' function does no longer exist. The badge and exception code are no longer carried in the message buffers but are handled in kernel-specific ways. Issue #610 Issue #1832
77 lines
1.6 KiB
C++
77 lines
1.6 KiB
C++
/*
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* \brief OKL4-specific layout of IPC message buffer
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* \author Norman Feske
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* \date 2009-03-25
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*
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* On OKL4, we do not directly use the a kernel-specific message-buffer layout.
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* The IPC goes through the UTCBs of the sending and receiving threads. Because
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* on Genode, message buffers are decoupled from threads, we need to copy-in
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* and copy-out the message payload between the message buffers and the used
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* UTCBs.
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*/
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/*
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* Copyright (C) 2009-2013 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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#ifndef _INCLUDE__BASE__IPC_MSGBUF_H_
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#define _INCLUDE__BASE__IPC_MSGBUF_H_
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#include <base/stdint.h>
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#include <base/printf.h>
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namespace Genode {
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class Ipc_marshaller;
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/**
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* IPC message buffer layout
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*/
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class Msgbuf_base
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{
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protected:
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size_t _data_size = 0;
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size_t _capacity;
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char _msg_start[]; /* symbol marks start of message */
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Msgbuf_base(size_t capacity) : _capacity(capacity) { }
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friend class Ipc_marshaller;
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public:
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/**
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* Return size of message buffer
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*/
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size_t capacity() const { return _capacity; };
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/**
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* Return pointer of message data payload
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*/
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void *data() { return &_msg_start[0]; };
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void const *data() const { return &_msg_start[0]; };
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size_t data_size() const { return _data_size; }
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};
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/**
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* Instance of IPC message buffer with specified buffer size
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*/
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template <unsigned BUF_SIZE>
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class Msgbuf : public Msgbuf_base
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{
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public:
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char buf[BUF_SIZE];
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Msgbuf() : Msgbuf_base(BUF_SIZE) { }
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};
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}
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#endif /* _INCLUDE__BASE__IPC_MSGBUF_H_ */
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