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LibIPC: Decode messages using Core::Stream internally

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This commit is contained in:
Tim Schumacher 2023-01-14 22:04:55 +01:00 committed by Tim Flynn
parent d1711f1cef
commit 3ed9627f4e
Notes: sideshowbarker 2024-07-17 07:09:53 +09:00 
Author: https://github.com/timschumi
Commit: https://github.com/SerenityOS/serenity/commit/3ed9627f4e
Pull-request: https://github.com/SerenityOS/serenity/pull/17029
Reviewed-by: https://github.com/trflynn89 ✅
2 changed files with 16 additions and 31 deletions
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34
Meta/Lagom/Tools/CodeGenerators/IPCCompiler/main.cpp
View file

@ -293,21 +293,6 @@ DeprecatedString constructor_for_message(DeprecatedString const& name, Vector<Pa
return builder.to_deprecated_string();
}
static void append_handle_stream_error(SourceGenerator& generator, StringView error_message)
{
if constexpr (GENERATE_DEBUG) {
generator.set("error_message"sv, error_message);
generator.append(R"~~~(
if (stream.handle_any_error()) {
dbgln("@error_message@");
return Error::from_string_literal("@error_message@");
})~~~");
} else {
generator.append(R"~~~(
TRY(stream.try_handle_any_error());)~~~");
}
}
void do_message(SourceGenerator message_generator, DeprecatedString const& name, Vector<Parameter> const& parameters, DeprecatedString const& response_type = {})
{
auto pascal_name = pascal_case(name);
@ -353,7 +338,7 @@ public:)~~~");
static i32 static_message_id() { return (int)MessageID::@message.pascal_name@; }
virtual const char* message_name() const override { return "@endpoint.name@::@message.pascal_name@"; }
static ErrorOr<NonnullOwnPtr<@message.pascal_name@>> decode(InputMemoryStream& stream, Core::Stream::LocalSocket& socket)
static ErrorOr<NonnullOwnPtr<@message.pascal_name@>> decode(Core::Stream::Stream& stream, Core::Stream::LocalSocket& socket)
{
IPC::Decoder decoder { stream, socket };)~~~");
@ -387,7 +372,6 @@ public:)~~~");
}
message_generator.set("message.constructor_call_parameters", builder.build());
append_handle_stream_error(message_generator, "Failed to read the message"sv);
message_generator.appendln(R"~~~(
return make<@message.pascal_name@>(@message.constructor_call_parameters@);
})~~~");
@ -602,10 +586,8 @@ public:
static ErrorOr<NonnullOwnPtr<IPC::Message>> decode_message(ReadonlyBytes buffer, [[maybe_unused]] Core::Stream::LocalSocket& socket)
{
InputMemoryStream stream { buffer };
u32 message_endpoint_magic = 0;
stream >> message_endpoint_magic;)~~~");
append_handle_stream_error(generator, "Failed to read message endpoint magic"sv);
auto stream = TRY(Core::Stream::FixedMemoryStream::construct(buffer));
auto message_endpoint_magic = TRY(stream->read_value<u32>());)~~~");
generator.append(R"~~~(
if (message_endpoint_magic != @endpoint.magic@) {)~~~");
@ -617,9 +599,7 @@ public:
return Error::from_string_literal("Endpoint magic number mismatch, not my message!");
}
i32 message_id = 0;
stream >> message_id;)~~~");
append_handle_stream_error(generator, "Failed to read message ID"sv);
auto message_id = TRY(stream->read_value<i32>());)~~~");
generator.appendln(R"~~~(
switch (message_id) {)~~~");
@ -633,7 +613,7 @@ public:
message_generator.append(R"~~~(
case (int)Messages::@endpoint.name@::MessageID::@message.pascal_name@:
return TRY(Messages::@endpoint.name@::@message.pascal_name@::decode(stream, socket));)~~~");
return TRY(Messages::@endpoint.name@::@message.pascal_name@::decode(*stream, socket));)~~~");
};
do_decode_message(message.name);
@ -787,11 +767,11 @@ void build(StringBuilder& builder, Vector<Endpoint> const& endpoints)
}
}
generator.appendln(R"~~~(#include <AK/MemoryStream.h>
#include <AK/Error.h>
generator.appendln(R"~~~(#include <AK/Error.h>
#include <AK/OwnPtr.h>
#include <AK/Result.h>
#include <AK/Utf8View.h>
#include <LibCore/MemoryStream.h>
#include <LibIPC/Connection.h>
#include <LibIPC/Decoder.h>
#include <LibIPC/Dictionary.h>

13
Userland/Libraries/LibIPC/Decoder.h
View file

@ -33,7 +33,7 @@ inline ErrorOr<T> decode(Decoder&)
class Decoder {
public:
Decoder(InputMemoryStream& stream, Core::Stream::LocalSocket& socket)
Decoder(Core::Stream::Stream& stream, Core::Stream::LocalSocket& socket)
: m_stream(stream)
, m_socket(socket)
{
@ -45,8 +45,13 @@ public:
template<typename T>
ErrorOr<void> decode_into(T& value)
{
m_stream >> value;
TRY(m_stream.try_handle_any_error());
value = TRY(m_stream.read_value<T>());
return {};
}
ErrorOr<void> decode_into(Bytes bytes)
{
TRY(m_stream.read_entire_buffer(bytes));
return {};
}
@ -55,7 +60,7 @@ public:
Core::Stream::LocalSocket& socket() { return m_socket; }
private:
InputMemoryStream& m_stream;
Core::Stream::Stream& m_stream;
Core::Stream::LocalSocket& m_socket;
};