commit f669acb01880216b6c1d29fc226f2c3ec3a6368a
author Mark Salyzyn <salyzyn@google.com> Tue Sep 16 09:19:47 2014 -0700
committer Mark Salyzyn <salyzyn@google.com> Mon Sep 29 17:40:10 2014 +0000
tree ddb806912d2abdb7b526cae9fb7cedf1fec93623
parent 68c19686e8f9b5a88e3b2729a453d03516be79f1

logd: in nonblocking read, sched_yield() synchronization

- sched_yield and lock synchronization in reader thread
  startup to give writer thread a chance to catch up

Bug: 17512203
Change-Id: I43cf0b4e2829b22b3ab4e537fa95ce13c76a869c

logd/LogReader.cpp

diff --git a/logd/LogReader.cpp b/logd/LogReader.cpp
index 8458c19..26df087 100644
--- a/logd/LogReader.cpp
+++ b/logd/LogReader.cpp
@@ -92,6 +92,11 @@
 
     bool nonBlock = false;
     if (strncmp(buffer, "dumpAndClose", 12) == 0) {
+        // Allow writer to get some cycles, and wait for pending notifications
+        sched_yield();
+        LogTimeEntry::lock();
+        LogTimeEntry::unlock();
+        sched_yield();
         nonBlock = true;
     }