An AsyncBaseOp represents a pending operation. You may set a notification callback or you may use this class's methods directly.
Synopsis
Declared in <folly/io/async/AsyncBase.h>
class AsyncBaseOp;Description
The op must remain allocated until it is completed or canceled.
Type Aliases
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Callback invoked when the operation completes. |
Enums
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Description |
Lifecycle state of an operation. |
Member Functions
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Description |
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Constructors |
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Destroy the operation. |
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Deleted copy assignment. |
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Return this operation as an AsyncIOOp, if it is one. |
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Return this operation as an IoUringOp, if it is one. |
Get the notification callback from the op. |
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user data get/set |
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Initiate a vectored read request. |
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Initiate a vectored write request. |
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Reset the operation for reuse. It is an error to call reset() on an Op that is still pending. |
Retrieve the result of this operation. Returns >=0 on success, ‐errno on failure (that is, using the Linux kernel error reporting conventions). Use checkKernelError (folly/Exception.h) on the result to throw a std::system_error in case of error instead. |
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Set the callback invoked when the operation completes. |
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Associate an opaque user data pointer with this operation. |
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Return the current operation state. |
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Write a human‐readable description of this operation to the stream. |
Static Member Functions
Name |
Description |
Return a human‐readable name for the given file descriptor. |
Protected Member Functions
Protected Data Members
Friends
Name |
Description |
Generic C++ interface around Linux IO(io_submit, io_uring) |