genode/repos/os/src/test/rom_block/main.cc

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/*
* \brief ROM-file to block-session client test implementation
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* \author Stefan Kalkowski
* \author Martin Stein
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* \date 2010-07-07
*
* The test program compares the values delivered by the block-service,
* with the original rom-file.
*/
/*
* Copyright (C) 2010-2017 Genode Labs GmbH
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*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU Affero General Public License version 3.
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*/
/* Genode includes */
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#include <base/allocator_avl.h>
#include <base/heap.h>
#include <base/component.h>
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#include <block_session/connection.h>
#include <base/attached_rom_dataspace.h>
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using namespace Genode;
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struct Main
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{
Follow practices suggested by "Effective C++" The patch adjust the code of the base, base-<kernel>, and os repository. To adapt existing components to fix violations of the best practices suggested by "Effective C++" as reported by the -Weffc++ compiler argument. The changes follow the patterns outlined below: * A class with virtual functions can no longer publicly inherit base classed without a vtable. The inherited object may either be moved to a member variable, or inherited privately. The latter would be used for classes that inherit 'List::Element' or 'Avl_node'. In order to enable the 'List' and 'Avl_tree' to access the meta data, the 'List' must become a friend. * Instead of adding a virtual destructor to abstract base classes, we inherit the new 'Interface' class, which contains a virtual destructor. This way, single-line abstract base classes can stay as compact as they are now. The 'Interface' utility resides in base/include/util/interface.h. * With the new warnings enabled, all member variables must be explicitly initialized. Basic types may be initialized with '='. All other types are initialized with braces '{ ... }' or as class initializers. If basic types and non-basic types appear in a row, it is nice to only use the brace syntax (also for basic types) and align the braces. * If a class contains pointers as members, it must now also provide a copy constructor and assignment operator. In the most cases, one would make them private, effectively disallowing the objects to be copied. Unfortunately, this warning cannot be fixed be inheriting our existing 'Noncopyable' class (the compiler fails to detect that the inheriting class cannot be copied and still gives the error). For now, we have to manually add declarations for both the copy constructor and assignment operator as private class members. Those declarations should be prepended with a comment like this: /* * Noncopyable */ Thread(Thread const &); Thread &operator = (Thread const &); In the future, we should revisit these places and try to replace the pointers with references. In the presence of at least one reference member, the compiler would no longer implicitly generate a copy constructor. So we could remove the manual declaration. Issue #465
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static constexpr Block::sector_t REQ_PARALLEL = 10;
using File_name = String<64>;
using Packet_descriptor = Block::Packet_descriptor;
struct Files_differ : Exception { };
struct Device_not_readable : Exception { };
struct Read_request_failed : Exception { };
Env &env;
Attached_rom_dataspace config { env, "config" };
File_name file_name { config.xml().attribute_value("file", File_name()) };
Heap heap { env.ram(), env.rm() };
Allocator_avl block_alloc { &heap };
Block::Connection<> block { env, &block_alloc };
Attached_rom_dataspace rom { env, file_name.string() };
Main(Env &env) : env(env)
{
log("--- ROM Block test ---");
Block::Session::Tx::Source &src = *block.tx();
Block::Session::Info const info = block.info();
log("We have ", info.block_count, " blocks with a "
"size of ", info.block_size, " bytes");
for (size_t i = 0; i < info.block_count; i += REQ_PARALLEL) {
size_t const cnt = (info.block_count - i > REQ_PARALLEL)
? REQ_PARALLEL : info.block_count - i;
Packet_descriptor pkt(block.alloc_packet(cnt * info.block_size),
Packet_descriptor::READ, i, cnt);
log("Check blocks ", i, "..", i + cnt - 1);
src.submit_packet(pkt);
pkt = src.get_acked_packet();
if (!pkt.succeeded()) {
throw Read_request_failed(); }
char const *rom_src = rom.local_addr<char>() + i * info.block_size;
if (strcmp(rom_src, src.packet_content(pkt), rom.size())) {
throw Files_differ(); }
src.release_packet(pkt);
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}
log("--- ROM Block test finished ---");
env.parent().exit(0);
}
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};
void Component::construct(Env &env) { static Main main(env); }