From 01dda0048fd1053dc3ad78a95df2db1935003619 Mon Sep 17 00:00:00 2001
From: Oliver Kowalke <oliver.kowalke@gmx.de>
Date: Sun, 11 Oct 2015 08:42:48 +0200
Subject: [PATCH] remove std::mutex associated with yield-queue

---
 include/boost/fiber/scheduler.hpp | 1 -
 src/scheduler.cpp                 | 3 ---
 2 files changed, 4 deletions(-)

diff --git a/include/boost/fiber/scheduler.hpp b/include/boost/fiber/scheduler.hpp
index 0d2bfd17..c98c80ac 100644
--- a/include/boost/fiber/scheduler.hpp
+++ b/include/boost/fiber/scheduler.hpp
@@ -89,7 +89,6 @@ private:
     sleep_queue_t                       sleep_queue_;
     bool                                shutdown_;
     detail::spinlock                    remote_ready_splk_;
-    std::mutex                          mtx_;
 
     void resume_( context *, context *);
 
diff --git a/src/scheduler.cpp b/src/scheduler.cpp
index 694535ee..684a191e 100644
--- a/src/scheduler.cpp
+++ b/src/scheduler.cpp
@@ -106,7 +106,6 @@ scheduler::remote_ready2ready_() {
 
 void
 scheduler::yield2ready_() {
-    std::unique_lock< std::mutex > lk( mtx_);
     // get context from yield-queue
     while ( ! yield_queue_.empty() ) {
         context * ctx = & yield_queue_.front();
@@ -360,9 +359,7 @@ scheduler::yield( context * active_ctx) noexcept {
     // in work-sharing context (multiple threads read
     // from one ready-queue) the context must be
     // already suspended until another thread resumes it
-    std::unique_lock< std::mutex > lk( mtx_);
     active_ctx->yield_link( yield_queue_);
-    lk.unlock();
     // resume another fiber
     resume_( active_ctx, get_next_() );
 }