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`.
87 lines
1.9 KiB
Go
87 lines
1.9 KiB
Go
package locks
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import (
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"sync"
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)
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type (
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ConditionVariableImpl struct {
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lock Locker
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chanLock sync.Mutex
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channel chan struct{}
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}
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)
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var _ ConditionVariable = (*ConditionVariableImpl)(nil)
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func NewConditionVariable(
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lock Locker,
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) *ConditionVariableImpl {
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return &ConditionVariableImpl{
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lock: lock,
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chanLock: sync.Mutex{},
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channel: newCVChannel(),
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}
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}
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// Signal wakes one goroutine waiting on this condition variable, if there is any.
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func (c *ConditionVariableImpl) Signal() {
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c.chanLock.Lock()
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defer c.chanLock.Unlock()
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select {
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case c.channel <- struct{}{}:
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default:
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// noop
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}
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}
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// Broadcast wakes all goroutines waiting on this condition variable.
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func (c *ConditionVariableImpl) Broadcast() {
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newChannel := newCVChannel()
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c.chanLock.Lock()
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defer c.chanLock.Unlock()
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close(c.channel)
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c.channel = newChannel
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}
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// Wait atomically unlocks user provided lock and suspends execution of the calling goroutine.
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// After later resuming execution, Wait locks c.L before returning.
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// Wait can be awoken by Broadcast, Signal or user provided interrupt channel.
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func (c *ConditionVariableImpl) Wait(
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interrupt <-chan struct{},
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) {
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c.chanLock.Lock()
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channel := c.channel
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c.chanLock.Unlock()
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// user provided lock must be released after getting the above channel
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// so channel to be waited on < release of user lock < acquire of user lock < signal / broadcast
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// ```
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// That is, if another thread is able to acquire the mutex after the about-to-block
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// thread has released it, then a subsequent call to pthread_cond_signal() or
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// pthread_cond_broadcast() in that thread behaves as if it were issued after the
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// about-to-block thread has blocked.
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// ref: https://pubs.opengroup.org/onlinepubs/007908799/xsh/pthread_cond_wait.html
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// ```
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c.lock.Unlock()
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defer c.lock.Lock()
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select {
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case <-channel:
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// received signal
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case <-interrupt:
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// interrupted
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}
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}
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func newCVChannel() chan struct{} {
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return make(chan struct{}, 1)
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}
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