Emery Hemingway
68c1b8675c
A ring buffer that uses a single dataspace mapped twice in consecutive regions. This allows any operation that is less or equal to the size of the buffer to be read or written in a single pass. The capacity of Magic_ring_buffer is defined at runtime. Fix #2725
58 lines
1.2 KiB
C++
58 lines
1.2 KiB
C++
/*
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* \brief Magic ring buffer test
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* \author Emery Hemingway
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* \date 2018-04-04
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*/
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/*
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* Copyright (C) 2018 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 Affero General Public License version 3.
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*/
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/* Genode includes */
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#include <base/component.h>
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#include <base/log.h>
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/* gems includes */
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#include <gems/magic_ring_buffer.h>
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void Component::construct(Genode::Env &env)
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{
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using namespace Genode;
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Magic_ring_buffer<int> ring_buffer(env, 4097);
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log("--- magic ring buffer test, ", ring_buffer.capacity(), " int ring ---");
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int const count = ring_buffer.capacity()/3;
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int total = 0;
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for (int j = 0; j < 99; ++j) {
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for (int i = 0; i < count; ++i) {
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ring_buffer.write_addr()[i] = i;
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}
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ring_buffer.fill(count);
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for (int i = 0; i < count; ++i) {
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if (ring_buffer.read_addr()[i] != i) {
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error("ring buffer corruption, ",
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ring_buffer.read_addr()[i], " != ", i);
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env.parent().exit(total+i);
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return;
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}
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}
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ring_buffer.drain(count);
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total += count;
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}
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log("--- test complete, ", total, " ints passed through ring ---");
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env.parent().exit(0);
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}
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