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Diffstat (limited to 'pw_system/transfer_handlers.cc')
-rw-r--r-- | pw_system/transfer_handlers.cc | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/pw_system/transfer_handlers.cc b/pw_system/transfer_handlers.cc new file mode 100644 index 000000000..2737f8e8f --- /dev/null +++ b/pw_system/transfer_handlers.cc @@ -0,0 +1,39 @@ +// Copyright 2023 The Pigweed Authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy of +// the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations under +// the License. +#include "pw_system/transfer_handlers.h" + +namespace pw::system { + +TracePersistentBufferTransfer::TracePersistentBufferTransfer( + uint32_t id, TracePersistentBuffer& persistent_buffer) + : transfer::ReadOnlyHandler(id), + persistent_buffer_(persistent_buffer), + reader_({}) { + set_reader(reader_); +} + +Status TracePersistentBufferTransfer::PrepareRead() { + if (!persistent_buffer_.has_value()) { + return Status::Unavailable(); + } + + // As seeking is not yet supported, reinitialize the reader from the start + // of the snapshot buffer. + new (&reader_) stream::MemoryReader( + pw::ConstByteSpan{persistent_buffer_.data(), persistent_buffer_.size()}); + + return OkStatus(); +} + +} // namespace pw::system |