#include <seastar/core/file.hh>
#include <seastar/core/iostream.hh>
#include <seastar/core/shared_ptr.hh>
#include <seastar/core/internal/api-level.hh>
Go to the source code of this file.
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input_stream< char > | seastar::make_file_input_stream (file file, uint64_t offset, uint64_t len, file_input_stream_options options={}) |
| Creates an input_stream to read a portion of a file. More...
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input_stream< char > | seastar::make_file_input_stream (file file, uint64_t offset, file_input_stream_options={}) |
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input_stream< char > | seastar::make_file_input_stream (file file, file_input_stream_options={}) |
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output_stream< char > | seastar::api_v2::make_file_output_stream (file file, uint64_t buffer_size=8192) |
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output_stream< char > | seastar::api_v2::make_file_output_stream (file file, file_output_stream_options options) |
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data_sink | seastar::api_v2::make_file_data_sink (file, file_output_stream_options) |
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future< output_stream< char > > | seastar::api_v3::make_file_output_stream (file file, uint64_t buffer_size=8192) noexcept |
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future< output_stream< char > > | seastar::api_v3::make_file_output_stream (file file, file_output_stream_options options) noexcept |
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future< data_sink > | seastar::api_v3::make_file_data_sink (file, file_output_stream_options) noexcept |
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◆ seastar::file_input_stream_options
struct seastar::file_input_stream_options |
Class Members |
size_t |
buffer_size |
I/O buffer size. |
lw_shared_ptr< file_input_stream_history > |
dynamic_adjustments |
Input stream history, if null dynamic adjustments are disabled. |
::io_priority_class |
io_priority_class |
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unsigned |
read_ahead |
Maximum number of extra read-ahead operations. |
◆ seastar::file_output_stream_options
struct seastar::file_output_stream_options |
Class Members |
unsigned |
buffer_size |
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::io_priority_class |
io_priority_class |
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unsigned |
preallocation_size |
Preallocate extents. For large files, set to a large number (a few megabytes) to reduce fragmentation. |
unsigned |
write_behind |
Number of buffers to write in parallel. |
◆ make_file_data_sink() [1/2]
Create a data_sink for writing starting at the position zero of a newly created file.
◆ make_file_data_sink() [2/2]
Create a data_sink for writing starting at the position zero of a newly created file. Closes the file if the sink creation fails.
◆ make_file_output_stream() [1/4]
Create an output_stream for writing starting at the position zero of a newly created file. NOTE: flush() should be the last thing to be called on a file output stream.
◆ make_file_output_stream() [2/4]
Create an output_stream for writing starting at the position zero of a newly created file. NOTE: flush() should be the last thing to be called on a file output stream. Closes the file if the stream creation fails.
◆ make_file_output_stream() [3/4]
output_stream<char> seastar::api_v2::make_file_output_stream |
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file |
file, |
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uint64_t |
buffer_size = 8192 |
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Create an output_stream for writing starting at the position zero of a newly created file. NOTE: flush() should be the last thing to be called on a file output stream.
- Examples
- file_demo.cc.
◆ make_file_output_stream() [4/4]
future<output_stream<char> > seastar::api_v3::and_newer::make_file_output_stream |
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file |
file, |
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uint64_t |
buffer_size = 8192 |
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) |
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noexcept |
Create an output_stream for writing starting at the position zero of a newly created file. NOTE: flush() should be the last thing to be called on a file output stream. Closes the file if the stream creation fails.