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

(cherry picked from commit f669acb0)

Bug: 17512203
Change-Id: I43cf0b4e2829b22b3ab4e537fa95ce13c76a869c

parent b3facbfd

logd/LogReader.cpp

+5 −0

Original line number	Diff line number	Diff line
		@@ -92,6 +92,11 @@ bool LogReader::onDataAvailable(SocketClient *cli) {

		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;
		}