mirror of
https://github.com/nodejs/node.git
synced 2026-11-09 15:11:11 -05:00
cjihrig
537a4baa44
Notable changes: - Building via cmake is now supported. PR-URL: https://github.com/libuv/libuv/pull/1850 - Stricter checks have been added to prevent watching the same file descriptor multiple times. PR-URL: https://github.com/libuv/libuv/pull/1851 Refs: https://github.com/nodejs/node/issues/3604 - An IPC deadlock on Windows has been fixed. PR-URL: https://github.com/libuv/libuv/pull/1843 Fixes: https://github.com/nodejs/node/issues/9706 Fixes: https://github.com/nodejs/node/issues/7657 - uv_fs_lchown() has been added. PR-URL: https://github.com/libuv/libuv/pull/1826 Refs: https://github.com/nodejs/node/issues/19868 - uv_fs_copyfile() sets errno on error. PR-URL: https://github.com/libuv/libuv/pull/1881 Fixes: https://github.com/nodejs/node/issues/21329 - uv_fs_fchmod() supports -A files on Windows. PR-URL: https://github.com/libuv/libuv/pull/1819 Refs: https://github.com/nodejs/node/issues/12803 PR-URL: https://github.com/nodejs/node/pull/21466 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com>
117 lines
3.0 KiB
ReStructuredText
117 lines
3.0 KiB
ReStructuredText
|
|
.. _request:
|
|
|
|
:c:type:`uv_req_t` --- Base request
|
|
===================================
|
|
|
|
`uv_req_t` is the base type for all libuv request types.
|
|
|
|
Structures are aligned so that any libuv request can be cast to `uv_req_t`.
|
|
All API functions defined here work with any request type.
|
|
|
|
|
|
Data types
|
|
----------
|
|
|
|
.. c:type:: uv_req_t
|
|
|
|
The base libuv request structure.
|
|
|
|
.. c:type:: uv_any_req
|
|
|
|
Union of all request types.
|
|
|
|
|
|
Public members
|
|
^^^^^^^^^^^^^^
|
|
|
|
.. c:member:: void* uv_req_t.data
|
|
|
|
Space for user-defined arbitrary data. libuv does not use this field.
|
|
|
|
.. c:member:: uv_req_type uv_req_t.type
|
|
|
|
Indicated the type of request. Readonly.
|
|
|
|
::
|
|
|
|
typedef enum {
|
|
UV_UNKNOWN_REQ = 0,
|
|
UV_REQ,
|
|
UV_CONNECT,
|
|
UV_WRITE,
|
|
UV_SHUTDOWN,
|
|
UV_UDP_SEND,
|
|
UV_FS,
|
|
UV_WORK,
|
|
UV_GETADDRINFO,
|
|
UV_GETNAMEINFO,
|
|
UV_REQ_TYPE_MAX,
|
|
} uv_req_type;
|
|
|
|
|
|
API
|
|
---
|
|
|
|
.. c:function:: UV_REQ_TYPE_MAP(iter_macro)
|
|
|
|
Macro that expands to a series of invocations of `iter_macro` for
|
|
each of the request types. `iter_macro` is invoked with two
|
|
arguments: the name of the `uv_req_type` element without the `UV_`
|
|
prefix, and the name of the corresponding structure type without the
|
|
`uv_` prefix and `_t` suffix.
|
|
|
|
.. c:function:: int uv_cancel(uv_req_t* req)
|
|
|
|
Cancel a pending request. Fails if the request is executing or has finished
|
|
executing.
|
|
|
|
Returns 0 on success, or an error code < 0 on failure.
|
|
|
|
Only cancellation of :c:type:`uv_fs_t`, :c:type:`uv_getaddrinfo_t`,
|
|
:c:type:`uv_getnameinfo_t` and :c:type:`uv_work_t` requests is
|
|
currently supported.
|
|
|
|
Cancelled requests have their callbacks invoked some time in the future.
|
|
It's **not** safe to free the memory associated with the request until the
|
|
callback is called.
|
|
|
|
Here is how cancellation is reported to the callback:
|
|
|
|
* A :c:type:`uv_fs_t` request has its req->result field set to `UV_ECANCELED`.
|
|
|
|
* A :c:type:`uv_work_t`, :c:type:`uv_getaddrinfo_t` or c:type:`uv_getnameinfo_t`
|
|
request has its callback invoked with status == `UV_ECANCELED`.
|
|
|
|
.. c:function:: size_t uv_req_size(uv_req_type type)
|
|
|
|
Returns the size of the given request type. Useful for FFI binding writers
|
|
who don't want to know the structure layout.
|
|
|
|
.. c:function:: void* uv_req_get_data(const uv_req_t* req)
|
|
|
|
Returns `req->data`.
|
|
|
|
.. versionadded:: 1.19.0
|
|
|
|
.. c:function:: void* uv_req_set_data(uv_req_t* req, void* data)
|
|
|
|
Sets `req->data` to `data`.
|
|
|
|
.. versionadded:: 1.19.0
|
|
|
|
.. c:function:: uv_req_type uv_req_get_type(const uv_req_t* req)
|
|
|
|
Returns `req->type`.
|
|
|
|
.. versionadded:: 1.19.0
|
|
|
|
.. c:function:: const char* uv_req_type_name(uv_req_type type)
|
|
|
|
Returns the name for the equivalent struct for a given request type,
|
|
e.g. `"connect"` (as in :c:type:`uv_connect_t`) for `UV_CONNECT`.
|
|
|
|
If no such request type exists, this returns `NULL`.
|
|
|
|
.. versionadded:: 1.19.0
|