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Diffstat (limited to 'src/dma/vendor/github.com/go-redis/redis/pipeline.go')
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/pipeline.go113
1 files changed, 113 insertions, 0 deletions
diff --git a/src/dma/vendor/github.com/go-redis/redis/pipeline.go b/src/dma/vendor/github.com/go-redis/redis/pipeline.go
new file mode 100644
index 00000000..ba852283
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/pipeline.go
@@ -0,0 +1,113 @@
+package redis
+
+import (
+ "sync"
+
+ "github.com/go-redis/redis/internal/pool"
+)
+
+type pipelineExecer func([]Cmder) error
+
+type Pipeliner interface {
+ StatefulCmdable
+ Process(cmd Cmder) error
+ Close() error
+ Discard() error
+ Exec() ([]Cmder, error)
+}
+
+var _ Pipeliner = (*Pipeline)(nil)
+
+// Pipeline implements pipelining as described in
+// http://redis.io/topics/pipelining. It's safe for concurrent use
+// by multiple goroutines.
+type Pipeline struct {
+ statefulCmdable
+
+ exec pipelineExecer
+
+ mu sync.Mutex
+ cmds []Cmder
+ closed bool
+}
+
+// Process queues the cmd for later execution.
+func (c *Pipeline) Process(cmd Cmder) error {
+ c.mu.Lock()
+ c.cmds = append(c.cmds, cmd)
+ c.mu.Unlock()
+ return nil
+}
+
+// Close closes the pipeline, releasing any open resources.
+func (c *Pipeline) Close() error {
+ c.mu.Lock()
+ c.discard()
+ c.closed = true
+ c.mu.Unlock()
+ return nil
+}
+
+// Discard resets the pipeline and discards queued commands.
+func (c *Pipeline) Discard() error {
+ c.mu.Lock()
+ err := c.discard()
+ c.mu.Unlock()
+ return err
+}
+
+func (c *Pipeline) discard() error {
+ if c.closed {
+ return pool.ErrClosed
+ }
+ c.cmds = c.cmds[:0]
+ return nil
+}
+
+// Exec executes all previously queued commands using one
+// client-server roundtrip.
+//
+// Exec always returns list of commands and error of the first failed
+// command if any.
+func (c *Pipeline) Exec() ([]Cmder, error) {
+ c.mu.Lock()
+ defer c.mu.Unlock()
+
+ if c.closed {
+ return nil, pool.ErrClosed
+ }
+
+ if len(c.cmds) == 0 {
+ return nil, nil
+ }
+
+ cmds := c.cmds
+ c.cmds = nil
+
+ return cmds, c.exec(cmds)
+}
+
+func (c *Pipeline) pipelined(fn func(Pipeliner) error) ([]Cmder, error) {
+ if err := fn(c); err != nil {
+ return nil, err
+ }
+ cmds, err := c.Exec()
+ _ = c.Close()
+ return cmds, err
+}
+
+func (c *Pipeline) Pipelined(fn func(Pipeliner) error) ([]Cmder, error) {
+ return c.pipelined(fn)
+}
+
+func (c *Pipeline) Pipeline() Pipeliner {
+ return c
+}
+
+func (c *Pipeline) TxPipelined(fn func(Pipeliner) error) ([]Cmder, error) {
+ return c.pipelined(fn)
+}
+
+func (c *Pipeline) TxPipeline() Pipeliner {
+ return c
+}