mirror of
https://github.com/hanzoai/tasks.git
synced 2026-10-04 02:04:03 +00:00
Alex ShtinandGitHub
8e8f1b0f7c
## What changed?
<!-- Describe what has changed in this PR -->
Remove license header from every file. Because it is really hard to
follow in this PR here is the summary:
1. License header is removed from all `.go` and `.proto` files
:fireworks::fireworks:🎆.
2. `LICENSE` file in the root directory has only Temporal and Uber
copyrights.
3. 5 other `LICENSE` files added to the packages which have copyrights
different from Temporal and Uber: Datadog, Xargin, "Mat Ryer, Tyler
Bunnell and contributors".
4. `license_file` flag is removed from all code generation tools.
5. `copyright_file` flag is removed from `go:generate mockgen`
directive.
6. All copyright related targets are removed from `Makefile`.
7. Updated Temporal copyright year to 2025 everywhere.
## Why?
<!-- Tell your future self why have you made these changes -->
I double checked with legal department that it is not needed to have
license header in every file. One file per repo is enough. I put all
copyrights to the root `LICENSE` file and removed header from all other
files. Also updated tools and `Makefile`.
98 lines
1.7 KiB
Go
98 lines
1.7 KiB
Go
package future
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import (
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"context"
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"sync/atomic"
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)
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const (
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// pending status indicates future is not ready
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// setting status indicates future is in transition to be ready, used to prevent data race
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// ready status indicates future is ready
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pending int32 = iota
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setting
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ready
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)
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type (
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FutureImpl[T any] struct {
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status int32
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readyCh chan struct{}
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value T
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err error
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}
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)
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func NewFuture[T any]() *FutureImpl[T] {
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var value T
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return &FutureImpl[T]{
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status: pending,
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readyCh: make(chan struct{}),
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value: value,
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err: nil,
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}
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}
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func (f *FutureImpl[T]) Get(
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ctx context.Context,
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) (T, error) {
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if f.Ready() {
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return f.value, f.err
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}
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select {
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case <-f.readyCh:
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return f.value, f.err
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case <-ctx.Done():
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var value T
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return value, ctx.Err()
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}
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}
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func (f *FutureImpl[T]) Set(
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value T,
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err error,
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) {
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// cannot directly set status to `ready`, to prevent data race in case multiple `Get` occurs
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// instead set status to `setting` to prevent concurrent completion of this future
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if !atomic.CompareAndSwapInt32(
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&f.status,
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pending,
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setting,
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) {
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panic("future has already been completed")
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}
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f.value = value
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f.err = err
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atomic.CompareAndSwapInt32(&f.status, setting, ready)
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close(f.readyCh)
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}
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// Sets the value of the future, if it has not been set already. Returns true if this call set the value.
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func (f *FutureImpl[T]) SetIfNotReady(
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value T,
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err error,
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) bool {
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if !atomic.CompareAndSwapInt32(
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&f.status,
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pending,
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setting,
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) {
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return false
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}
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f.value = value
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f.err = err
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atomic.CompareAndSwapInt32(&f.status, setting, ready)
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close(f.readyCh)
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return true
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}
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func (f *FutureImpl[T]) Ready() bool {
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return atomic.LoadInt32(&f.status) == ready
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}
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