From 1df33ffacf98f09a33969a8c8ed4078247524d29 Mon Sep 17 00:00:00 2001
From: chenshijun <chenshijun@aiotlink.com>
Date: 星期五, 09 十月 2020 14:27:45 +0800
Subject: [PATCH] attach增加超时
---
shmwrap.go | 76 +++++++++++++++++++++++++++++++++++--
1 files changed, 71 insertions(+), 5 deletions(-)
diff --git a/shmwrap.go b/shmwrap.go
index 8dad1d7..7697cb7 100644
--- a/shmwrap.go
+++ b/shmwrap.go
@@ -4,7 +4,12 @@
"context"
"fmt"
"time"
- "github.com/gen2brain/shm"
+ shm "basic.com/valib/goshm.git"
+)
+
+const (
+ sleepPeriod = time.Duration(5) * time.Millisecond
+ attachTimes = 100
)
// NewBlock shm block with size
@@ -72,7 +77,7 @@
if err == nil {
break loopB
}
- time.Sleep(time.Millisecond)
+ time.Sleep(sleepPeriod)
data, id, err = NewBlock(size, key)
}
}
@@ -93,8 +98,31 @@
if err == nil {
break loopB
}
- time.Sleep(time.Millisecond)
+ time.Sleep(sleepPeriod)
data, id, err = AttachBlock(key)
+ }
+ }
+ }
+ return data, id
+}
+
+//AttachRawShmTimeout don't create
+func AttachRawShmTimeout(ctx context.Context, key int) ([]byte, int) {
+ tryCount := 0
+ data, id, err := AttachBlock(key)
+ if err != nil {
+ loopB:
+ for {
+ select {
+ case <-ctx.Done():
+ return nil, -1
+ default:
+ if err == nil || tryCount > attachTimes {
+ break loopB
+ }
+ time.Sleep(sleepPeriod)
+ data, id, err = AttachBlock(key)
+ tryCount++
}
}
}
@@ -115,7 +143,33 @@
if err == nil {
break loopB
}
- time.Sleep(time.Millisecond)
+ time.Sleep(sleepPeriod)
+ id, err = NewBlockOnly(size, key)
+ }
+ }
+ }
+ return id
+}
+
+// CreateShmOnly create shm block with size, only space, no padding, return id(int)
+// context for quit
+func CreateShmOnlyTime(ctx context.Context, size int, key int, timeout int) int {
+ id, err := NewBlockOnly(size, key)
+ if err != nil {
+ to := time.NewTimer(time.Duration(timeout) * time.Millisecond)
+ defer to.Stop()
+ loopB:
+ for {
+ select {
+ case <-ctx.Done():
+ return -1
+ case <-to.C:
+ return -1
+ default:
+ if err == nil {
+ break loopB
+ }
+ time.Sleep(sleepPeriod)
id, err = NewBlockOnly(size, key)
}
}
@@ -139,7 +193,7 @@
} else {
fmt.Println("createShm error:", err)
}
- time.Sleep(time.Millisecond)
+ time.Sleep(sleepPeriod)
data, id, err = NewBlock(size, key)
}
}
@@ -149,6 +203,18 @@
return data, id
}
+// CheckShmExist check if shm is exist or not
+// if exist, return id and true, else return 0 and false
+func CheckShmExist(key int) (int, bool) {
+ id, err := shm.Get(key, 0, 0)
+ if err != nil || id == -1 { //no exist
+ fmt.Printf("AttachBlock Get:%x, %v\n", key, err)
+ return 0, false
+ }
+
+ return id, true
+}
+
// DetachShm destroy
func DetachShm(data []byte) {
ReleaseBlock(data)
--
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