From f4e9bc8bfbbe412f6b9852179b432c2262adb1cb Mon Sep 17 00:00:00 2001
From: Dmitriy Ryajov <dryajov@gmail.com>
Date: Wed, 12 Feb 2020 09:39:32 -0500
Subject: [PATCH] remove sleepAsync for synchronization

---
 libp2p/stream/bufferstream.nim | 42 ++++++++++++++++++----------------
 1 file changed, 22 insertions(+), 20 deletions(-)

diff --git a/libp2p/stream/bufferstream.nim b/libp2p/stream/bufferstream.nim
index b4f87f75f..f3f29e049 100644
--- a/libp2p/stream/bufferstream.nim
+++ b/libp2p/stream/bufferstream.nim
@@ -103,30 +103,32 @@ proc pushTo*(s: BufferStream, data: seq[byte]) {.async.} =
   ## is preserved.
   ##
 
-  await s.lock.acquire()
-  var index = 0
-  while true:
+  try:
+    await s.lock.acquire()
+    var index = 0
+    while true:
+      # give readers a chance free up the buffer
+      # it it's full.
+      if s.readBuf.len >= s.maxSize:
+        await sleepAsync(1.millis)
 
-    # give readers a chance free up the buffer
-    # it it's full.
-    if s.readBuf.len >= s.maxSize:
-      await sleepAsync(10.millis)
+      while index < data.len and s.readBuf.len < s.maxSize:
+        s.readBuf.addLast(data[index])
+        inc(index)
 
-    while index < data.len and s.readBuf.len < s.maxSize:
-      s.readBuf.addLast(data[index])
-      inc(index)
+      # resolve the next queued read request
+      if s.readReqs.len > 0:
+        s.readReqs.popFirst().complete()
 
-    # resolve the next queued read request
-    if s.readReqs.len > 0:
-      s.readReqs.popFirst().complete()
+      if index >= data.len:
+        return
 
-    if index >= data.len:
-      break
-
-    # if we couldn't transfer all the data to the
-    # internal buf wait on a read event
-    await s.dataReadEvent.wait()
-  s.lock.release()
+      # if we couldn't transfer all the data to the
+      # internal buf wait on a read event
+      await s.dataReadEvent.wait()
+      s.dataReadEvent.clear()
+  finally:
+    s.lock.release()
 
 method read*(s: BufferStream, n = -1): Future[seq[byte]] {.async.} =
   ## Read all bytes (n <= 0) or exactly `n` bytes from buffer