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`.
154 lines
3.1 KiB
Go
154 lines
3.1 KiB
Go
package locks
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import (
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"context"
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"fmt"
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"sync"
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)
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const (
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PriorityMutexStateUnlocked PriorityMutexState = 0
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PriorityMutexStateLockedByHigh PriorityMutexState = 1
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PriorityMutexStateLockedByLow PriorityMutexState = 2
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)
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type (
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PriorityMutexState int
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PriorityMutexImpl struct {
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locker sync.Locker
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highCV ConditionVariable
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lowCV ConditionVariable
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highWait int
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lowWait int
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lockState PriorityMutexState
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}
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)
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var _ PriorityMutex = (*PriorityMutexImpl)(nil)
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func NewPriorityMutex() *PriorityMutexImpl {
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lock := &sync.Mutex{}
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syncCV := NewConditionVariable(lock)
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asyncCV := NewConditionVariable(lock)
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return &PriorityMutexImpl{
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locker: lock,
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highCV: syncCV,
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lowCV: asyncCV,
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highWait: 0,
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lowWait: 0,
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lockState: PriorityMutexStateUnlocked,
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}
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}
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// LockHigh try to lock with high priority, use LockHigh / UnlockHigh pair to lock / unlock
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func (c *PriorityMutexImpl) LockHigh(
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ctx context.Context,
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) error {
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c.locker.Lock()
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defer c.locker.Unlock()
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c.highWait += 1
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defer func() { c.highWait -= 1 }()
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for c.lockState != PriorityMutexStateUnlocked && ctx.Err() == nil {
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c.highCV.Wait(ctx.Done())
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}
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if ctx.Err() != nil {
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return ctx.Err()
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}
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c.lockState = PriorityMutexStateLockedByHigh
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return nil
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}
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// LockLow try to lock with low priority, use LockLow / UnlockLow pair to lock / unlock
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func (c *PriorityMutexImpl) LockLow(
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ctx context.Context,
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) error {
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c.locker.Lock()
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defer c.locker.Unlock()
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c.lowWait += 1
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defer func() { c.lowWait -= 1 }()
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for c.lockState != PriorityMutexStateUnlocked && ctx.Err() == nil {
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c.lowCV.Wait(ctx.Done())
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}
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if ctx.Err() != nil {
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return ctx.Err()
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}
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c.lockState = PriorityMutexStateLockedByLow
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return nil
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}
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func (c *PriorityMutexImpl) TryLockHigh() bool {
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c.locker.Lock()
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defer c.locker.Unlock()
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if c.lockState != PriorityMutexStateUnlocked {
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return false
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}
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c.lockState = PriorityMutexStateLockedByHigh
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return true
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}
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func (c *PriorityMutexImpl) TryLockLow() bool {
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c.locker.Lock()
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defer c.locker.Unlock()
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if c.lockState != PriorityMutexStateUnlocked {
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return false
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}
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c.lockState = PriorityMutexStateLockedByLow
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return true
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}
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// UnlockHigh unlock with high priority, use LockHigh / UnlockHigh pair to lock / unlock
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func (c *PriorityMutexImpl) UnlockHigh() {
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c.locker.Lock()
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defer c.locker.Unlock()
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if c.lockState != PriorityMutexStateLockedByHigh {
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panic(fmt.Sprintf("unable to unlock high priority, state: %v\n", c.lockState))
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}
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c.lockState = PriorityMutexStateUnlocked
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c.notify()
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}
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// UnlockLow unlock with low priority, use LockLow / UnlockLow pair to lock / unlock
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func (c *PriorityMutexImpl) UnlockLow() {
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c.locker.Lock()
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defer c.locker.Unlock()
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if c.lockState != PriorityMutexStateLockedByLow {
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panic(fmt.Sprintf("unable to unlock high priority, state: %v\n", c.lockState))
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}
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c.lockState = PriorityMutexStateUnlocked
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c.notify()
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}
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func (c *PriorityMutexImpl) IsLocked() bool {
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c.locker.Lock()
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defer c.locker.Unlock()
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return c.lockState != PriorityMutexStateUnlocked
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}
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func (c *PriorityMutexImpl) notify() {
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if c.highWait > 0 {
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c.highCV.Signal()
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} else if c.lowWait > 0 {
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c.lowCV.Signal()
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}
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}
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