SERVER-41357 Add mongo::mutex polyfill

4 files changed, 156 insertions, 3 deletions

diff --git a/src/mongo/platform/SConscript b/src/mongo/platform/SConscript
index e6ec2c4d004..171a183fa45 100644
--- a/src/mongo/platform/SConscript
+++ b/src/mongo/platform/SConscript
@@ -1,9 +1,7 @@
 # -*- mode: python -*-
 
 Import("env")
-
 env = env.Clone()
-
 env.CppUnitTest(
     target='platform_test',
     source=[
@@ -11,6 +9,7 @@ env.CppUnitTest(
         'atomic_word_test.cpp',
         'bits_test.cpp',
         'endian_test.cpp',
+        'mutex_test.cpp',
         'process_id_test.cpp',
         'random_test.cpp',
         'stack_locator_test.cpp',
@@ -18,4 +17,7 @@ env.CppUnitTest(
         'decimal128_bson_test.cpp',
         'overflow_arithmetic_test.cpp'
     ],
-)
+    LIBDEPS=[
+        '$BUILD_DIR/mongo/db/service_context'
+    ]
+)
\ No newline at end of file
diff --git a/src/mongo/platform/mutex.cpp b/src/mongo/platform/mutex.cpp
new file mode 100644
index 00000000000..5caba1a02c0
--- /dev/null
+++ b/src/mongo/platform/mutex.cpp
@@ -0,0 +1,46 @@
+/**
+ *    Copyright (C) 2018-present MongoDB, Inc.
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the Server Side Public License, version 1,
+ *    as published by MongoDB, Inc.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    Server Side Public License for more details.
+ *
+ *    You should have received a copy of the Server Side Public License
+ *    along with this program. If not, see
+ *    <http://www.mongodb.com/licensing/server-side-public-license>.
+ *
+ *    As a special exception, the copyright holders give permission to link the
+ *    code of portions of this program with the OpenSSL library under certain
+ *    conditions as described in each individual source file and distribute
+ *    linked combinations including the program with the OpenSSL library. You
+ *    must comply with the Server Side Public License in all respects for
+ *    all of the code used other than as permitted herein. If you modify file(s)
+ *    with this exception, you may extend this exception to your version of the
+ *    file(s), but you are not obligated to do so. If you do not wish to do so,
+ *    delete this exception statement from your version. If you delete this
+ *    exception statement from all source files in the program, then also delete
+ *    it in the license file.
+ */
+
+#include "mongo/platform/mutex.h"
+
+namespace mongo {
+
+void Mutex::lock() {
+    auto hasLock = _mutex.try_lock_for(_lockTimeout.toSystemDuration());
+    uassert(
+        ErrorCodes::InternalError, "Unable to take latch, wait time exceeds set timeout", hasLock);
+}
+void Mutex::unlock() {
+    _mutex.unlock();
+}
+bool Mutex::try_lock() {
+    return _mutex.try_lock();
+}
+
+}  // namespace mongo
\ No newline at end of file
diff --git a/src/mongo/platform/mutex.h b/src/mongo/platform/mutex.h
new file mode 100644
index 00000000000..46eb511e943
--- /dev/null
+++ b/src/mongo/platform/mutex.h
@@ -0,0 +1,57 @@
+/**
+ *    Copyright (C) 2018-present MongoDB, Inc.
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the Server Side Public License, version 1,
+ *    as published by MongoDB, Inc.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    Server Side Public License for more details.
+ *
+ *    You should have received a copy of the Server Side Public License
+ *    along with this program. If not, see
+ *    <http://www.mongodb.com/licensing/server-side-public-license>.
+ *
+ *    As a special exception, the copyright holders give permission to link the
+ *    code of portions of this program with the OpenSSL library under certain
+ *    conditions as described in each individual source file and distribute
+ *    linked combinations including the program with the OpenSSL library. You
+ *    must comply with the Server Side Public License in all respects for
+ *    all of the code used other than as permitted herein. If you modify file(s)
+ *    with this exception, you may extend this exception to your version of the
+ *    file(s), but you are not obligated to do so. If you do not wish to do so,
+ *    delete this exception statement from your version. If you delete this
+ *    exception statement from all source files in the program, then also delete
+ *    it in the license file.
+ */
+
+#pragma once
+
+#include "mongo/base/error_codes.h"
+#include "mongo/base/string_data.h"
+#include "mongo/stdx/mutex.h"
+#include "mongo/util/clock_source_mock.h"
+
+namespace mongo {
+
+class Mutex {
+public:
+    Mutex() : Mutex("AnonymousMutex"_sd) {}
+    explicit Mutex(const StringData& name) : _name(name) {}
+
+    void lock();
+    void unlock();
+    bool try_lock();
+    const StringData& getName() {
+        return _name;
+    }
+
+private:
+    const StringData _name;
+    const Seconds _lockTimeout = Seconds(60);
+    stdx::timed_mutex _mutex;
+};
+
+}  // namespace mongo
\ No newline at end of file
diff --git a/src/mongo/platform/mutex_test.cpp b/src/mongo/platform/mutex_test.cpp
new file mode 100644
index 00000000000..594a4147659
--- /dev/null
+++ b/src/mongo/platform/mutex_test.cpp
@@ -0,0 +1,48 @@
+/**
+ *    Copyright (C) 2018-present MongoDB, Inc.
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the Server Side Public License, version 1,
+ *    as published by MongoDB, Inc.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    Server Side Public License for more details.
+ *
+ *    You should have received a copy of the Server Side Public License
+ *    along with this program. If not, see
+ *    <http://www.mongodb.com/licensing/server-side-public-license>.
+ *
+ *    As a special exception, the copyright holders give permission to link the
+ *    code of portions of this program with the OpenSSL library under certain
+ *    conditions as described in each individual source file and distribute
+ *    linked combinations including the program with the OpenSSL library. You
+ *    must comply with the Server Side Public License in all respects for
+ *    all of the code used other than as permitted herein. If you modify file(s)
+ *    with this exception, you may extend this exception to your version of the
+ *    file(s), but you are not obligated to do so. If you do not wish to do so,
+ *    delete this exception statement from your version. If you delete this
+ *    exception statement from all source files in the program, then also delete
+ *    it in the license file.
+ */
+
+#include "mongo/unittest/unittest.h"
+
+#include "mongo/db/service_context.h"
+#include "mongo/platform/mutex.h"
+#include "mongo/stdx/thread.h"
+
+namespace mongo {
+TEST(MongoMutexTest, BasicSingleThread) {
+    auto serviceContext = ServiceContext::make();
+    setGlobalServiceContext(std::move(serviceContext));
+
+    Mutex m;
+    m.lock();
+    ASSERT(!m.try_lock());
+    m.unlock();
+    ASSERT(m.try_lock());
+    m.unlock();
+}
+}
\ No newline at end of file