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authorAndrey Khalyavin <halyavin@gmail.com>2022-02-10 16:46:30 +0300
committerDaniil Cherednik <dcherednik@yandex-team.ru>2022-02-10 16:46:30 +0300
commit4b839d0704ee9be1dabb0310a1f03af24963637b (patch)
tree1a2c5ffcf89eb53ecd79dbc9bc0a195c27404d0c /contrib/libs/cxxsupp/libcxx/src/shared_mutex.cpp
parentf773626848a7c7456803654292e716b83d69cc12 (diff)
downloadydb-4b839d0704ee9be1dabb0310a1f03af24963637b.tar.gz
Restoring authorship annotation for Andrey Khalyavin <halyavin@gmail.com>. Commit 2 of 2.
Diffstat (limited to 'contrib/libs/cxxsupp/libcxx/src/shared_mutex.cpp')
-rw-r--r--contrib/libs/cxxsupp/libcxx/src/shared_mutex.cpp230
1 files changed, 115 insertions, 115 deletions
diff --git a/contrib/libs/cxxsupp/libcxx/src/shared_mutex.cpp b/contrib/libs/cxxsupp/libcxx/src/shared_mutex.cpp
index fb84edec6f..5feef9f488 100644
--- a/contrib/libs/cxxsupp/libcxx/src/shared_mutex.cpp
+++ b/contrib/libs/cxxsupp/libcxx/src/shared_mutex.cpp
@@ -1,118 +1,118 @@
-//===---------------------- shared_mutex.cpp ------------------------------===//
-//
+//===---------------------- shared_mutex.cpp ------------------------------===//
+//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#include "__config"
-#ifndef _LIBCPP_HAS_NO_THREADS
-
-#include "shared_mutex"
-#if defined(__ELF__) && defined(_LIBCPP_LINK_PTHREAD_LIB)
-#pragma comment(lib, "pthread")
-#endif
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-// Shared Mutex Base
-__shared_mutex_base::__shared_mutex_base()
- : __state_(0)
-{
-}
-
-// Exclusive ownership
-
-void
-__shared_mutex_base::lock()
-{
- unique_lock<mutex> lk(__mut_);
- while (__state_ & __write_entered_)
- __gate1_.wait(lk);
- __state_ |= __write_entered_;
- while (__state_ & __n_readers_)
- __gate2_.wait(lk);
-}
-
-bool
-__shared_mutex_base::try_lock()
-{
- unique_lock<mutex> lk(__mut_);
- if (__state_ == 0)
- {
- __state_ = __write_entered_;
- return true;
- }
- return false;
-}
-
-void
-__shared_mutex_base::unlock()
-{
- lock_guard<mutex> _(__mut_);
- __state_ = 0;
- __gate1_.notify_all();
-}
-
-// Shared ownership
-
-void
-__shared_mutex_base::lock_shared()
-{
- unique_lock<mutex> lk(__mut_);
- while ((__state_ & __write_entered_) || (__state_ & __n_readers_) == __n_readers_)
- __gate1_.wait(lk);
- unsigned num_readers = (__state_ & __n_readers_) + 1;
- __state_ &= ~__n_readers_;
- __state_ |= num_readers;
-}
-
-bool
-__shared_mutex_base::try_lock_shared()
-{
- unique_lock<mutex> lk(__mut_);
- unsigned num_readers = __state_ & __n_readers_;
- if (!(__state_ & __write_entered_) && num_readers != __n_readers_)
- {
- ++num_readers;
- __state_ &= ~__n_readers_;
- __state_ |= num_readers;
- return true;
- }
- return false;
-}
-
-void
-__shared_mutex_base::unlock_shared()
-{
- lock_guard<mutex> _(__mut_);
- unsigned num_readers = (__state_ & __n_readers_) - 1;
- __state_ &= ~__n_readers_;
- __state_ |= num_readers;
- if (__state_ & __write_entered_)
- {
- if (num_readers == 0)
- __gate2_.notify_one();
- }
- else
- {
- if (num_readers == __n_readers_ - 1)
- __gate1_.notify_one();
- }
-}
-
-
-// Shared Timed Mutex
-// These routines are here for ABI stability
-shared_timed_mutex::shared_timed_mutex() : __base() {}
-void shared_timed_mutex::lock() { return __base.lock(); }
-bool shared_timed_mutex::try_lock() { return __base.try_lock(); }
-void shared_timed_mutex::unlock() { return __base.unlock(); }
-void shared_timed_mutex::lock_shared() { return __base.lock_shared(); }
-bool shared_timed_mutex::try_lock_shared() { return __base.try_lock_shared(); }
-void shared_timed_mutex::unlock_shared() { return __base.unlock_shared(); }
-
-_LIBCPP_END_NAMESPACE_STD
-
-#endif // !_LIBCPP_HAS_NO_THREADS
+//
+//===----------------------------------------------------------------------===//
+
+#include "__config"
+#ifndef _LIBCPP_HAS_NO_THREADS
+
+#include "shared_mutex"
+#if defined(__ELF__) && defined(_LIBCPP_LINK_PTHREAD_LIB)
+#pragma comment(lib, "pthread")
+#endif
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+// Shared Mutex Base
+__shared_mutex_base::__shared_mutex_base()
+ : __state_(0)
+{
+}
+
+// Exclusive ownership
+
+void
+__shared_mutex_base::lock()
+{
+ unique_lock<mutex> lk(__mut_);
+ while (__state_ & __write_entered_)
+ __gate1_.wait(lk);
+ __state_ |= __write_entered_;
+ while (__state_ & __n_readers_)
+ __gate2_.wait(lk);
+}
+
+bool
+__shared_mutex_base::try_lock()
+{
+ unique_lock<mutex> lk(__mut_);
+ if (__state_ == 0)
+ {
+ __state_ = __write_entered_;
+ return true;
+ }
+ return false;
+}
+
+void
+__shared_mutex_base::unlock()
+{
+ lock_guard<mutex> _(__mut_);
+ __state_ = 0;
+ __gate1_.notify_all();
+}
+
+// Shared ownership
+
+void
+__shared_mutex_base::lock_shared()
+{
+ unique_lock<mutex> lk(__mut_);
+ while ((__state_ & __write_entered_) || (__state_ & __n_readers_) == __n_readers_)
+ __gate1_.wait(lk);
+ unsigned num_readers = (__state_ & __n_readers_) + 1;
+ __state_ &= ~__n_readers_;
+ __state_ |= num_readers;
+}
+
+bool
+__shared_mutex_base::try_lock_shared()
+{
+ unique_lock<mutex> lk(__mut_);
+ unsigned num_readers = __state_ & __n_readers_;
+ if (!(__state_ & __write_entered_) && num_readers != __n_readers_)
+ {
+ ++num_readers;
+ __state_ &= ~__n_readers_;
+ __state_ |= num_readers;
+ return true;
+ }
+ return false;
+}
+
+void
+__shared_mutex_base::unlock_shared()
+{
+ lock_guard<mutex> _(__mut_);
+ unsigned num_readers = (__state_ & __n_readers_) - 1;
+ __state_ &= ~__n_readers_;
+ __state_ |= num_readers;
+ if (__state_ & __write_entered_)
+ {
+ if (num_readers == 0)
+ __gate2_.notify_one();
+ }
+ else
+ {
+ if (num_readers == __n_readers_ - 1)
+ __gate1_.notify_one();
+ }
+}
+
+
+// Shared Timed Mutex
+// These routines are here for ABI stability
+shared_timed_mutex::shared_timed_mutex() : __base() {}
+void shared_timed_mutex::lock() { return __base.lock(); }
+bool shared_timed_mutex::try_lock() { return __base.try_lock(); }
+void shared_timed_mutex::unlock() { return __base.unlock(); }
+void shared_timed_mutex::lock_shared() { return __base.lock_shared(); }
+bool shared_timed_mutex::try_lock_shared() { return __base.try_lock_shared(); }
+void shared_timed_mutex::unlock_shared() { return __base.unlock_shared(); }
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // !_LIBCPP_HAS_NO_THREADS