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Diffstat (limited to 'Godeps/_workspace/src/gopkg.in/redis.v2/rate_limit.go')
-rw-r--r--Godeps/_workspace/src/gopkg.in/redis.v2/rate_limit.go53
1 files changed, 53 insertions, 0 deletions
diff --git a/Godeps/_workspace/src/gopkg.in/redis.v2/rate_limit.go b/Godeps/_workspace/src/gopkg.in/redis.v2/rate_limit.go
new file mode 100644
index 000000000..20d851270
--- /dev/null
+++ b/Godeps/_workspace/src/gopkg.in/redis.v2/rate_limit.go
@@ -0,0 +1,53 @@
+package redis
+
+import (
+ "sync/atomic"
+ "time"
+)
+
+type rateLimiter struct {
+ v int64
+
+ _closed int64
+}
+
+func newRateLimiter(limit time.Duration, bucketSize int) *rateLimiter {
+ rl := &rateLimiter{
+ v: int64(bucketSize),
+ }
+ go rl.loop(limit, int64(bucketSize))
+ return rl
+}
+
+func (rl *rateLimiter) loop(limit time.Duration, bucketSize int64) {
+ for {
+ if rl.closed() {
+ break
+ }
+ if v := atomic.LoadInt64(&rl.v); v < bucketSize {
+ atomic.AddInt64(&rl.v, 1)
+ }
+ time.Sleep(limit)
+ }
+}
+
+func (rl *rateLimiter) Check() bool {
+ for {
+ if v := atomic.LoadInt64(&rl.v); v > 0 {
+ if atomic.CompareAndSwapInt64(&rl.v, v, v-1) {
+ return true
+ }
+ } else {
+ return false
+ }
+ }
+}
+
+func (rl *rateLimiter) Close() error {
+ atomic.StoreInt64(&rl._closed, 1)
+ return nil
+}
+
+func (rl *rateLimiter) closed() bool {
+ return atomic.LoadInt64(&rl._closed) == 1
+}