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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
89 lines
1.6 KiB
C++
89 lines
1.6 KiB
C++
/*
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* \brief Fiasco-specific layout of IPC message buffer
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* \author Norman Feske
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* \date 2006-06-14
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*/
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/*
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* Copyright (C) 2006-2013 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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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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private:
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size_t const _capacity;
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protected:
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size_t _data_size = 0;
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friend class Ipc_marshaller;
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Msgbuf_base(size_t capacity) : _capacity(capacity) { }
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struct Headroom { long space[4]; } _headroom;
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char buf[];
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public:
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template <typename T>
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T &header()
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{
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static_assert(sizeof(T) <= sizeof(Headroom),
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"Header size exceeds message headroom");
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return *reinterpret_cast<T *>(buf - sizeof(T));
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}
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unsigned long &word(unsigned i)
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{
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return reinterpret_cast<unsigned long *>(buf)[i];
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}
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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 buf; };
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void const *data() const { return buf; };
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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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