From ff2828be3dcb22f09d05117eaa1dddea17703ecf Mon Sep 17 00:00:00 2001
From: "Nicolas \"Pixel\" Noble" <pixel@nobis-crew.org>
Date: Fri, 3 Apr 2015 03:16:46 +0200
Subject: Rewriting mutex, condition_variable, and thread.

---
 include/grpc++/impl/sync_no_cxx11.h | 98 +++++++++++++++++++++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 include/grpc++/impl/sync_no_cxx11.h

(limited to 'include/grpc++/impl/sync_no_cxx11.h')

diff --git a/include/grpc++/impl/sync_no_cxx11.h b/include/grpc++/impl/sync_no_cxx11.h
new file mode 100644
index 0000000000..3bf4fb8e3d
--- /dev/null
+++ b/include/grpc++/impl/sync_no_cxx11.h
@@ -0,0 +1,98 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_SYNC_NO_CXX11_H
+#define GRPCXX_IMPL_SYNC_NO_CXX11_H
+
+#include <grpc/support/sync.h>
+
+namespace grpc {
+
+template<class mutex>
+class lock_guard;
+class condition_variable;
+
+class mutex {
+ public:
+  mutex() { gpr_mu_init(&mu_); }
+  ~mutex() { gpr_mu_destroy(&mu_); }
+ private:
+  ::gpr_mu mu_;
+  template <class mutex>
+  friend class lock_guard;
+  friend class condition_variable;
+};
+
+template <class mutex>
+class lock_guard {
+ public:
+   lock_guard(mutex &mu) : mu_(mu), locked(true) { gpr_mu_lock(&mu.mu_); }
+   ~lock_guard() { unlock(); }
+  void lock() {
+    if (!locked) gpr_mu_lock(&mu_.mu_);
+    locked = true;
+  }
+  void unlock() {
+    if (locked) gpr_mu_unlock(&mu_.mu_);
+    locked = false;
+  }
+ private:
+  mutex &mu_;
+  bool locked;
+  friend class condition_variable;
+};
+
+template <class mutex>
+class unique_lock : public lock_guard<mutex> {
+ public:
+   unique_lock(mutex &mu) : lock_guard(mu) { }
+};
+
+class condition_variable {
+ public:
+  condition_variable() { gpr_cv_init(&cv_); }
+  ~condition_variable() { gpr_cv_destroy(&cv_); }
+  void wait(lock_guard<mutex> &mu) {
+    mu.locked = false;
+    gpr_cv_wait(&cv_, &mu.mu_.mu_, gpr_inf_future);
+    mu.locked = true;
+  }
+  void notify_one() { gpr_cv_signal(&cv_); }
+  void notify_all() { gpr_cv_broadcast(&cv_); }
+ private:
+  gpr_cv cv_;
+};
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_SYNC_NO_CXX11_H
-- 
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