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authorAndrey Khalyavin <halyavin@gmail.com>2022-02-10 16:46:29 +0300
committerDaniil Cherednik <dcherednik@yandex-team.ru>2022-02-10 16:46:29 +0300
commitf773626848a7c7456803654292e716b83d69cc12 (patch)
treedb052dfcf9134f492bdbb962cb6c16cea58e1ed3 /contrib/libs/re2/util/mutex.h
parentf43ab775d197d300eb67bd4497632b909cd7c2a5 (diff)
downloadydb-f773626848a7c7456803654292e716b83d69cc12.tar.gz
Restoring authorship annotation for Andrey Khalyavin <halyavin@gmail.com>. Commit 1 of 2.
Diffstat (limited to 'contrib/libs/re2/util/mutex.h')
-rw-r--r--contrib/libs/re2/util/mutex.h256
1 files changed, 128 insertions, 128 deletions
diff --git a/contrib/libs/re2/util/mutex.h b/contrib/libs/re2/util/mutex.h
index 158046bb5c..6619daa4c4 100644
--- a/contrib/libs/re2/util/mutex.h
+++ b/contrib/libs/re2/util/mutex.h
@@ -1,15 +1,15 @@
-// Copyright 2007 The RE2 Authors. All Rights Reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-#ifndef UTIL_MUTEX_H_
-#define UTIL_MUTEX_H_
-
-/*
- * A simple mutex wrapper, supporting locks and read-write locks.
- * You should assume the locks are *not* re-entrant.
- */
-
+// Copyright 2007 The RE2 Authors. All Rights Reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#ifndef UTIL_MUTEX_H_
+#define UTIL_MUTEX_H_
+
+/*
+ * A simple mutex wrapper, supporting locks and read-write locks.
+ * You should assume the locks are *not* re-entrant.
+ */
+
#ifdef _WIN32
// Requires Windows Vista or Windows Server 2008 at minimum.
#include <windows.h>
@@ -17,55 +17,55 @@
#define MUTEX_IS_WIN32_SRWLOCK
#endif
#else
-#ifndef _POSIX_C_SOURCE
-#define _POSIX_C_SOURCE 200809L
-#endif
-#include <unistd.h>
-#if defined(_POSIX_READER_WRITER_LOCKS) && _POSIX_READER_WRITER_LOCKS > 0
-#define MUTEX_IS_PTHREAD_RWLOCK
-#endif
-#endif
-
+#ifndef _POSIX_C_SOURCE
+#define _POSIX_C_SOURCE 200809L
+#endif
+#include <unistd.h>
+#if defined(_POSIX_READER_WRITER_LOCKS) && _POSIX_READER_WRITER_LOCKS > 0
+#define MUTEX_IS_PTHREAD_RWLOCK
+#endif
+#endif
+
#if defined(MUTEX_IS_WIN32_SRWLOCK)
typedef SRWLOCK MutexType;
#elif defined(MUTEX_IS_PTHREAD_RWLOCK)
-#include <pthread.h>
-#include <stdlib.h>
-typedef pthread_rwlock_t MutexType;
-#else
-#include <mutex>
-typedef std::mutex MutexType;
-#endif
-
-namespace re2 {
-
-class Mutex {
- public:
- inline Mutex();
- inline ~Mutex();
- inline void Lock(); // Block if needed until free then acquire exclusively
- inline void Unlock(); // Release a lock acquired via Lock()
- // Note that on systems that don't support read-write locks, these may
- // be implemented as synonyms to Lock() and Unlock(). So you can use
- // these for efficiency, but don't use them anyplace where being able
- // to do shared reads is necessary to avoid deadlock.
- inline void ReaderLock(); // Block until free or shared then acquire a share
- inline void ReaderUnlock(); // Release a read share of this Mutex
- inline void WriterLock() { Lock(); } // Acquire an exclusive lock
- inline void WriterUnlock() { Unlock(); } // Release a lock from WriterLock()
-
- private:
- MutexType mutex_;
-
- // Catch the error of writing Mutex when intending MutexLock.
- Mutex(Mutex *ignored);
-
- Mutex(const Mutex&) = delete;
- Mutex& operator=(const Mutex&) = delete;
-};
-
+#include <pthread.h>
+#include <stdlib.h>
+typedef pthread_rwlock_t MutexType;
+#else
+#include <mutex>
+typedef std::mutex MutexType;
+#endif
+
+namespace re2 {
+
+class Mutex {
+ public:
+ inline Mutex();
+ inline ~Mutex();
+ inline void Lock(); // Block if needed until free then acquire exclusively
+ inline void Unlock(); // Release a lock acquired via Lock()
+ // Note that on systems that don't support read-write locks, these may
+ // be implemented as synonyms to Lock() and Unlock(). So you can use
+ // these for efficiency, but don't use them anyplace where being able
+ // to do shared reads is necessary to avoid deadlock.
+ inline void ReaderLock(); // Block until free or shared then acquire a share
+ inline void ReaderUnlock(); // Release a read share of this Mutex
+ inline void WriterLock() { Lock(); } // Acquire an exclusive lock
+ inline void WriterUnlock() { Unlock(); } // Release a lock from WriterLock()
+
+ private:
+ MutexType mutex_;
+
+ // Catch the error of writing Mutex when intending MutexLock.
+ Mutex(Mutex *ignored);
+
+ Mutex(const Mutex&) = delete;
+ Mutex& operator=(const Mutex&) = delete;
+};
+
#if defined(MUTEX_IS_WIN32_SRWLOCK)
-
+
Mutex::Mutex() : mutex_(SRWLOCK_INIT) { }
Mutex::~Mutex() { }
void Mutex::Lock() { AcquireSRWLockExclusive(&mutex_); }
@@ -75,74 +75,74 @@ void Mutex::ReaderUnlock() { ReleaseSRWLockShared(&mutex_); }
#elif defined(MUTEX_IS_PTHREAD_RWLOCK)
-#define SAFE_PTHREAD(fncall) \
- do { \
- if ((fncall) != 0) abort(); \
- } while (0)
-
-Mutex::Mutex() { SAFE_PTHREAD(pthread_rwlock_init(&mutex_, NULL)); }
-Mutex::~Mutex() { SAFE_PTHREAD(pthread_rwlock_destroy(&mutex_)); }
-void Mutex::Lock() { SAFE_PTHREAD(pthread_rwlock_wrlock(&mutex_)); }
-void Mutex::Unlock() { SAFE_PTHREAD(pthread_rwlock_unlock(&mutex_)); }
-void Mutex::ReaderLock() { SAFE_PTHREAD(pthread_rwlock_rdlock(&mutex_)); }
-void Mutex::ReaderUnlock() { SAFE_PTHREAD(pthread_rwlock_unlock(&mutex_)); }
-
-#undef SAFE_PTHREAD
-
-#else
-
-Mutex::Mutex() { }
-Mutex::~Mutex() { }
-void Mutex::Lock() { mutex_.lock(); }
-void Mutex::Unlock() { mutex_.unlock(); }
-void Mutex::ReaderLock() { Lock(); } // C++11 doesn't have std::shared_mutex.
-void Mutex::ReaderUnlock() { Unlock(); }
-
-#endif
-
-// --------------------------------------------------------------------------
-// Some helper classes
-
-// MutexLock(mu) acquires mu when constructed and releases it when destroyed.
-class MutexLock {
- public:
- explicit MutexLock(Mutex *mu) : mu_(mu) { mu_->Lock(); }
- ~MutexLock() { mu_->Unlock(); }
- private:
- Mutex * const mu_;
-
- MutexLock(const MutexLock&) = delete;
- MutexLock& operator=(const MutexLock&) = delete;
-};
-
-// ReaderMutexLock and WriterMutexLock do the same, for rwlocks
-class ReaderMutexLock {
- public:
- explicit ReaderMutexLock(Mutex *mu) : mu_(mu) { mu_->ReaderLock(); }
- ~ReaderMutexLock() { mu_->ReaderUnlock(); }
- private:
- Mutex * const mu_;
-
- ReaderMutexLock(const ReaderMutexLock&) = delete;
- ReaderMutexLock& operator=(const ReaderMutexLock&) = delete;
-};
-
-class WriterMutexLock {
- public:
- explicit WriterMutexLock(Mutex *mu) : mu_(mu) { mu_->WriterLock(); }
- ~WriterMutexLock() { mu_->WriterUnlock(); }
- private:
- Mutex * const mu_;
-
- WriterMutexLock(const WriterMutexLock&) = delete;
- WriterMutexLock& operator=(const WriterMutexLock&) = delete;
-};
-
-// Catch bug where variable name is omitted, e.g. MutexLock (&mu);
-#define MutexLock(x) static_assert(false, "MutexLock declaration missing variable name")
-#define ReaderMutexLock(x) static_assert(false, "ReaderMutexLock declaration missing variable name")
-#define WriterMutexLock(x) static_assert(false, "WriterMutexLock declaration missing variable name")
-
-} // namespace re2
-
-#endif // UTIL_MUTEX_H_
+#define SAFE_PTHREAD(fncall) \
+ do { \
+ if ((fncall) != 0) abort(); \
+ } while (0)
+
+Mutex::Mutex() { SAFE_PTHREAD(pthread_rwlock_init(&mutex_, NULL)); }
+Mutex::~Mutex() { SAFE_PTHREAD(pthread_rwlock_destroy(&mutex_)); }
+void Mutex::Lock() { SAFE_PTHREAD(pthread_rwlock_wrlock(&mutex_)); }
+void Mutex::Unlock() { SAFE_PTHREAD(pthread_rwlock_unlock(&mutex_)); }
+void Mutex::ReaderLock() { SAFE_PTHREAD(pthread_rwlock_rdlock(&mutex_)); }
+void Mutex::ReaderUnlock() { SAFE_PTHREAD(pthread_rwlock_unlock(&mutex_)); }
+
+#undef SAFE_PTHREAD
+
+#else
+
+Mutex::Mutex() { }
+Mutex::~Mutex() { }
+void Mutex::Lock() { mutex_.lock(); }
+void Mutex::Unlock() { mutex_.unlock(); }
+void Mutex::ReaderLock() { Lock(); } // C++11 doesn't have std::shared_mutex.
+void Mutex::ReaderUnlock() { Unlock(); }
+
+#endif
+
+// --------------------------------------------------------------------------
+// Some helper classes
+
+// MutexLock(mu) acquires mu when constructed and releases it when destroyed.
+class MutexLock {
+ public:
+ explicit MutexLock(Mutex *mu) : mu_(mu) { mu_->Lock(); }
+ ~MutexLock() { mu_->Unlock(); }
+ private:
+ Mutex * const mu_;
+
+ MutexLock(const MutexLock&) = delete;
+ MutexLock& operator=(const MutexLock&) = delete;
+};
+
+// ReaderMutexLock and WriterMutexLock do the same, for rwlocks
+class ReaderMutexLock {
+ public:
+ explicit ReaderMutexLock(Mutex *mu) : mu_(mu) { mu_->ReaderLock(); }
+ ~ReaderMutexLock() { mu_->ReaderUnlock(); }
+ private:
+ Mutex * const mu_;
+
+ ReaderMutexLock(const ReaderMutexLock&) = delete;
+ ReaderMutexLock& operator=(const ReaderMutexLock&) = delete;
+};
+
+class WriterMutexLock {
+ public:
+ explicit WriterMutexLock(Mutex *mu) : mu_(mu) { mu_->WriterLock(); }
+ ~WriterMutexLock() { mu_->WriterUnlock(); }
+ private:
+ Mutex * const mu_;
+
+ WriterMutexLock(const WriterMutexLock&) = delete;
+ WriterMutexLock& operator=(const WriterMutexLock&) = delete;
+};
+
+// Catch bug where variable name is omitted, e.g. MutexLock (&mu);
+#define MutexLock(x) static_assert(false, "MutexLock declaration missing variable name")
+#define ReaderMutexLock(x) static_assert(false, "ReaderMutexLock declaration missing variable name")
+#define WriterMutexLock(x) static_assert(false, "WriterMutexLock declaration missing variable name")
+
+} // namespace re2
+
+#endif // UTIL_MUTEX_H_