add mutex support

go.mod

@@ -3,6 +3,7 @@ module github.com/Selly-Modules/redisdb
 go 1.16
 
 require (
-	github.com/go-redis/redis/v8 v8.11.2
+	github.com/go-redis/redis/v8 v8.11.4
+	github.com/go-redsync/redsync/v4 v4.5.0
 	github.com/logrusorgru/aurora v2.0.3+incompatible
 )

go.sum

@@ -1,36 +1,66 @@
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 github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f h1:lO4WD4F/rVNCu3HqELle0jiPLLBs70cWOduZpkS1E78=
 github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f/go.mod h1:cuUVRXasLTGF7a8hSLbxyZXjz+1KgoB3wDUb6vlszIc=
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@@ -39,10 +69,11 @@ golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
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 golang.org/x/net v0.0.0-20200520004742-59133d7f0dd7/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
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@@ -51,14 +82,20 @@ golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5h
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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@@ -72,10 +109,16 @@ google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQ
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 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.3.0 h1:clyUAQHOM3G0M3f5vQj7LuJrETvjVot3Z5el9nffUtU=
 gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=

mutex.go

@@ -0,0 +1,39 @@
+package redisdb
+
+import (
+	"time"
+
+	"github.com/go-redsync/redsync/v4"
+	"github.com/go-redsync/redsync/v4/redis/goredis/v8"
+)
+
+// NewMutex ...
+func NewMutex(name string) *Mutex {
+	pool := goredis.NewPool(rdb)
+
+	rs := redsync.New(pool)
+
+	opts := []redsync.Option{
+		redsync.WithRetryDelay(time.Millisecond * 100), // retry after 100 ms
+		redsync.WithTries(10),                          // try 10 times
+	}
+
+	m := rs.NewMutex(name, opts...)
+
+	return &Mutex{mu: m}
+}
+
+// Mutex ...
+type Mutex struct {
+	mu *redsync.Mutex
+}
+
+// Lock ...
+func (m Mutex) Lock() error {
+	return m.mu.Lock()
+}
+
+// Unlock ...
+func (m Mutex) Unlock() (bool, error) {
+	return m.mu.Unlock()
+}