mirror of
https://github.com/hanzoai/tasks.git
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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`.
103 lines
2.2 KiB
Go
103 lines
2.2 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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// HashFunc represents a hash function for string
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HashFunc func(interface{}) uint32
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// IDMutex is an interface which can lock on specific comparable identifier
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IDMutex interface {
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LockID(identifier interface{})
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UnlockID(identifier interface{})
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}
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// idMutexShardImpl is the implementation of IDMutex shard
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idMutexImpl struct {
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numShard uint32
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hashFn HashFunc
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shards map[uint32]*idMutexShardImpl
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}
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// idMutexShardImpl is the implementation of IDMutex shard
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idMutexShardImpl struct {
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sync.Mutex
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mutexInfos map[interface{}]*mutexInfo
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}
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mutexInfo struct {
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// how many caller are using this lock info, including the
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// the caller already have the lock
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// this is guarded by lock in idLockImpl
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waitCount int
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// actual lock
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sync.Mutex
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}
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)
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// NewIDMutex create a new IDLock
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func NewIDMutex(numShard uint32, hashFn HashFunc) IDMutex {
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impl := &idMutexImpl{
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numShard: numShard,
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hashFn: hashFn,
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shards: make(map[uint32]*idMutexShardImpl),
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}
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for i := uint32(0); i < numShard; i++ {
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impl.shards[i] = &idMutexShardImpl{
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mutexInfos: make(map[interface{}]*mutexInfo),
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}
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}
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return impl
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}
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func newMutexInfo() *mutexInfo {
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return &mutexInfo{
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waitCount: 1,
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}
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}
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// LockID lock by specific identifier
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func (idMutex *idMutexImpl) LockID(identifier interface{}) {
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shard := idMutex.shards[idMutex.getShardIndex(identifier)]
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shard.Lock()
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mutexInfo, ok := shard.mutexInfos[identifier]
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if !ok {
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mutexInfo := newMutexInfo()
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shard.mutexInfos[identifier] = mutexInfo
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shard.Unlock()
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mutexInfo.Lock()
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return
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}
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mutexInfo.waitCount++
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shard.Unlock()
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mutexInfo.Lock()
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}
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// UnlockID unlock by specific identifier
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func (idMutex *idMutexImpl) UnlockID(identifier interface{}) {
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shard := idMutex.shards[idMutex.getShardIndex(identifier)]
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shard.Lock()
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defer shard.Unlock()
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mutexInfo, ok := shard.mutexInfos[identifier]
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if !ok {
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panic("cannot find workflow lock")
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}
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mutexInfo.Unlock()
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if mutexInfo.waitCount == 1 {
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delete(shard.mutexInfos, identifier)
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} else {
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mutexInfo.waitCount--
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}
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}
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func (idMutex *idMutexImpl) getShardIndex(key interface{}) uint32 {
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return idMutex.hashFn(key) % idMutex.numShard
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}
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