The sending mutex may be blocked due to the underlying conn blocking. If
that happens then we can't call close since close also attempts to hold
the sending mutex. Sending mutex is only used for serializing sends and
doesn't protect the fields close reads/writes. I believe we introduced
locking it so we would return ErrClosed. This commit instead introduces
a check in send which rechecks if we have since closed while attempting
to send.
Test Plan: expanded the test coverage
With this commit, the JSON encoding of `Request` always omits the params
member when calling `Conn.Call`, `Conn.DispatchCall`, or `Conn.Notify`
with the `params` argument set to `nil`. This change also removes the
`OmitNilParams` call option that was added in commit 8012d496 (#62).
As of this commit, if users desire to send a JSON-RPC request with a
`params` value of `null`, then they may do so by explicitly setting the
`params` argument of `Conn.Call`/`Conn.DispatchCall`/`Conn.Notify` to
`json.RawMessage("null")`.
This merge request moves some of the contents from the jsonrpc2.go file
into their own designated file. The new files being introduced
(excluding test files) are as follows:
* conn.go
* request.go
* response.go
The motive of this change is to make it easier to navigate the code.
Without this change, the jsonrpc2.go file is 813 lines of code.