hankin
423baff73b
- Docker bridge 网络隔离（8000 端口封死） - Gunicorn 4 Worker 多进程 - Alembic 数据库迁移基线 - 日志轮转 20m×3 - JWT 密钥 + DB 密码 + CORS 收紧 - 3-2-1 备份链路（NAS + R740-B 冷备） - 连接池 pool_pre_ping + pool_recycle=3600
66 lines
2.2 KiB
Cython
66 lines
2.2 KiB
Cython
cdef class UVRequest:
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"""A base class for all libuv requests (uv_getaddrinfo_t, etc).
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Important: it's a responsibility of the subclass to call the
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"on_done" method in the request's callback.
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If "on_done" isn't called, the request object will never die.
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"""
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def __cinit__(self, Loop loop, *_):
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self.request = NULL
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self.loop = loop
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self.done = 0
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Py_INCREF(self)
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cdef on_done(self):
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self.done = 1
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Py_DECREF(self)
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cdef cancel(self):
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# Most requests are implemented using a threadpool. It's only
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# possible to cancel a request when it's still in a threadpool's
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# queue. Once it's started to execute, we have to wait until
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# it finishes and calls its callback (and callback *must* call
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# UVRequest.on_done).
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cdef int err
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if self.done == 1:
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return
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if UVLOOP_DEBUG:
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if self.request is NULL:
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raise RuntimeError(
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'{}.cancel: .request is NULL'.format(
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self.__class__.__name__))
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if self.request.data is NULL:
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raise RuntimeError(
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'{}.cancel: .request.data is NULL'.format(
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self.__class__.__name__))
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if <UVRequest>self.request.data is not self:
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raise RuntimeError(
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'{}.cancel: .request.data is not UVRequest'.format(
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self.__class__.__name__))
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# We only can cancel pending requests. Let's try.
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err = uv.uv_cancel(self.request)
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if err < 0:
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if err == uv.UV_EBUSY:
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# Can't close the request -- it's executing (see the first
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# comment). Loop will have to wait until the callback
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# fires.
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pass
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elif err == uv.UV_EINVAL:
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# From libuv docs:
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#
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# Only cancellation of uv_fs_t, uv_getaddrinfo_t,
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# uv_getnameinfo_t and uv_work_t requests is currently
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# supported.
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return
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else:
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ex = convert_error(err)
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self.loop._handle_exception(ex)
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