| /* |
| Licensed to the Apache Software Foundation (ASF) under one |
| or more contributor license agreements. See the NOTICE file |
| distributed with this work for additional information |
| regarding copyright ownership. The ASF licenses this file |
| to you under the Apache License, Version 2.0 (the |
| "License"); you may not use this file except in compliance |
| with the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, |
| software distributed under the License is distributed on an |
| "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| KIND, either express or implied. See the License for the |
| specific language governing permissions and limitations |
| under the License. |
| */ |
| |
| // Internal implementation details - ignore. |
| package proton |
| |
| // #cgo LDFLAGS: -lqpid-proton-core |
| // #include <proton/error.h> |
| // #include <proton/codec.h> |
| import "C" |
| |
| import ( |
| "fmt" |
| "sync" |
| "sync/atomic" |
| ) |
| |
| type PnErrorCode int |
| |
| func (e PnErrorCode) String() string { |
| switch e { |
| case C.PN_EOS: |
| return "end-of-data" |
| case C.PN_ERR: |
| return "error" |
| case C.PN_OVERFLOW: |
| return "overflow" |
| case C.PN_UNDERFLOW: |
| return "underflow" |
| case C.PN_STATE_ERR: |
| return "bad-state" |
| case C.PN_ARG_ERR: |
| return "invalid-argument" |
| case C.PN_TIMEOUT: |
| return "timeout" |
| case C.PN_INTR: |
| return "interrupted" |
| case C.PN_INPROGRESS: |
| return "in-progress" |
| default: |
| return fmt.Sprintf("unknown-error(%d)", e) |
| } |
| } |
| |
| func PnError(e *C.pn_error_t) error { |
| if e == nil || C.pn_error_code(e) == 0 { |
| return nil |
| } |
| return fmt.Errorf("%s: %s", PnErrorCode(C.pn_error_code(e)), C.GoString(C.pn_error_text(e))) |
| } |
| |
| // ErrorHolder is a goroutine-safe error holder that keeps the first error that is set. |
| type ErrorHolder struct { |
| once sync.Once |
| value atomic.Value |
| } |
| |
| // Set the error if not already set |
| func (e *ErrorHolder) Set(err error) { |
| if err != nil { |
| e.once.Do(func() { e.value.Store(err) }) |
| } |
| } |
| |
| // Get the error. |
| func (e *ErrorHolder) Get() (err error) { |
| err, _ = e.value.Load().(error) |
| return |
| } |