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-rw-r--r--contrib/restricted/abseil-cpp-tstring/y_absl/synchronization/internal/waiter.h280
1 files changed, 140 insertions, 140 deletions
diff --git a/contrib/restricted/abseil-cpp-tstring/y_absl/synchronization/internal/waiter.h b/contrib/restricted/abseil-cpp-tstring/y_absl/synchronization/internal/waiter.h
index e6fede411f..4a8d86cc0e 100644
--- a/contrib/restricted/abseil-cpp-tstring/y_absl/synchronization/internal/waiter.h
+++ b/contrib/restricted/abseil-cpp-tstring/y_absl/synchronization/internal/waiter.h
@@ -1,155 +1,155 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-#ifndef ABSL_SYNCHRONIZATION_INTERNAL_WAITER_H_
-#define ABSL_SYNCHRONIZATION_INTERNAL_WAITER_H_
-
+// Copyright 2017 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#ifndef ABSL_SYNCHRONIZATION_INTERNAL_WAITER_H_
+#define ABSL_SYNCHRONIZATION_INTERNAL_WAITER_H_
+
#include "y_absl/base/config.h"
-
-#ifdef _WIN32
-#include <sdkddkver.h>
-#else
-#include <pthread.h>
-#endif
-
-#ifdef __linux__
-#include <linux/futex.h>
-#endif
-
-#ifdef ABSL_HAVE_SEMAPHORE_H
-#include <semaphore.h>
-#endif
-
-#include <atomic>
-#include <cstdint>
-
+
+#ifdef _WIN32
+#include <sdkddkver.h>
+#else
+#include <pthread.h>
+#endif
+
+#ifdef __linux__
+#include <linux/futex.h>
+#endif
+
+#ifdef ABSL_HAVE_SEMAPHORE_H
+#include <semaphore.h>
+#endif
+
+#include <atomic>
+#include <cstdint>
+
#include "y_absl/base/internal/thread_identity.h"
#include "y_absl/synchronization/internal/futex.h"
#include "y_absl/synchronization/internal/kernel_timeout.h"
-
-// May be chosen at compile time via -DABSL_FORCE_WAITER_MODE=<index>
-#define ABSL_WAITER_MODE_FUTEX 0
-#define ABSL_WAITER_MODE_SEM 1
-#define ABSL_WAITER_MODE_CONDVAR 2
-#define ABSL_WAITER_MODE_WIN32 3
-
-#if defined(ABSL_FORCE_WAITER_MODE)
-#define ABSL_WAITER_MODE ABSL_FORCE_WAITER_MODE
-#elif defined(_WIN32) && _WIN32_WINNT >= _WIN32_WINNT_VISTA
-#define ABSL_WAITER_MODE ABSL_WAITER_MODE_WIN32
+
+// May be chosen at compile time via -DABSL_FORCE_WAITER_MODE=<index>
+#define ABSL_WAITER_MODE_FUTEX 0
+#define ABSL_WAITER_MODE_SEM 1
+#define ABSL_WAITER_MODE_CONDVAR 2
+#define ABSL_WAITER_MODE_WIN32 3
+
+#if defined(ABSL_FORCE_WAITER_MODE)
+#define ABSL_WAITER_MODE ABSL_FORCE_WAITER_MODE
+#elif defined(_WIN32) && _WIN32_WINNT >= _WIN32_WINNT_VISTA
+#define ABSL_WAITER_MODE ABSL_WAITER_MODE_WIN32
#elif defined(ABSL_INTERNAL_HAVE_FUTEX)
-#define ABSL_WAITER_MODE ABSL_WAITER_MODE_FUTEX
-#elif defined(ABSL_HAVE_SEMAPHORE_H)
-#define ABSL_WAITER_MODE ABSL_WAITER_MODE_SEM
-#else
-#define ABSL_WAITER_MODE ABSL_WAITER_MODE_CONDVAR
-#endif
-
+#define ABSL_WAITER_MODE ABSL_WAITER_MODE_FUTEX
+#elif defined(ABSL_HAVE_SEMAPHORE_H)
+#define ABSL_WAITER_MODE ABSL_WAITER_MODE_SEM
+#else
+#define ABSL_WAITER_MODE ABSL_WAITER_MODE_CONDVAR
+#endif
+
namespace y_absl {
ABSL_NAMESPACE_BEGIN
-namespace synchronization_internal {
-
-// Waiter is an OS-specific semaphore.
-class Waiter {
- public:
- // Prepare any data to track waits.
- Waiter();
-
- // Not copyable or movable
- Waiter(const Waiter&) = delete;
- Waiter& operator=(const Waiter&) = delete;
-
- // Destroy any data to track waits.
- ~Waiter();
-
- // Blocks the calling thread until a matching call to `Post()` or
- // `t` has passed. Returns `true` if woken (`Post()` called),
- // `false` on timeout.
- bool Wait(KernelTimeout t);
-
- // Restart the caller of `Wait()` as with a normal semaphore.
- void Post();
-
- // If anyone is waiting, wake them up temporarily and cause them to
- // call `MaybeBecomeIdle()`. They will then return to waiting for a
- // `Post()` or timeout.
- void Poke();
-
- // Returns the Waiter associated with the identity.
- static Waiter* GetWaiter(base_internal::ThreadIdentity* identity) {
- static_assert(
- sizeof(Waiter) <= sizeof(base_internal::ThreadIdentity::WaiterState),
- "Insufficient space for Waiter");
- return reinterpret_cast<Waiter*>(identity->waiter_state.data);
- }
-
- // How many periods to remain idle before releasing resources
+namespace synchronization_internal {
+
+// Waiter is an OS-specific semaphore.
+class Waiter {
+ public:
+ // Prepare any data to track waits.
+ Waiter();
+
+ // Not copyable or movable
+ Waiter(const Waiter&) = delete;
+ Waiter& operator=(const Waiter&) = delete;
+
+ // Destroy any data to track waits.
+ ~Waiter();
+
+ // Blocks the calling thread until a matching call to `Post()` or
+ // `t` has passed. Returns `true` if woken (`Post()` called),
+ // `false` on timeout.
+ bool Wait(KernelTimeout t);
+
+ // Restart the caller of `Wait()` as with a normal semaphore.
+ void Post();
+
+ // If anyone is waiting, wake them up temporarily and cause them to
+ // call `MaybeBecomeIdle()`. They will then return to waiting for a
+ // `Post()` or timeout.
+ void Poke();
+
+ // Returns the Waiter associated with the identity.
+ static Waiter* GetWaiter(base_internal::ThreadIdentity* identity) {
+ static_assert(
+ sizeof(Waiter) <= sizeof(base_internal::ThreadIdentity::WaiterState),
+ "Insufficient space for Waiter");
+ return reinterpret_cast<Waiter*>(identity->waiter_state.data);
+ }
+
+ // How many periods to remain idle before releasing resources
#ifndef ABSL_HAVE_THREAD_SANITIZER
static constexpr int kIdlePeriods = 60;
-#else
- // Memory consumption under ThreadSanitizer is a serious concern,
- // so we release resources sooner. The value of 1 leads to 1 to 2 second
- // delay before marking a thread as idle.
- static const int kIdlePeriods = 1;
-#endif
-
- private:
-#if ABSL_WAITER_MODE == ABSL_WAITER_MODE_FUTEX
- // Futexes are defined by specification to be 32-bits.
- // Thus std::atomic<int32_t> must be just an int32_t with lockfree methods.
- std::atomic<int32_t> futex_;
- static_assert(sizeof(int32_t) == sizeof(futex_), "Wrong size for futex");
-
-#elif ABSL_WAITER_MODE == ABSL_WAITER_MODE_CONDVAR
- // REQUIRES: mu_ must be held.
- void InternalCondVarPoke();
-
- pthread_mutex_t mu_;
- pthread_cond_t cv_;
- int waiter_count_;
- int wakeup_count_; // Unclaimed wakeups.
-
-#elif ABSL_WAITER_MODE == ABSL_WAITER_MODE_SEM
- sem_t sem_;
- // This seems superfluous, but for Poke() we need to cause spurious
- // wakeups on the semaphore. Hence we can't actually use the
- // semaphore's count.
- std::atomic<int> wakeups_;
-
-#elif ABSL_WAITER_MODE == ABSL_WAITER_MODE_WIN32
- // WinHelper - Used to define utilities for accessing the lock and
- // condition variable storage once the types are complete.
- class WinHelper;
-
- // REQUIRES: WinHelper::GetLock(this) must be held.
- void InternalCondVarPoke();
-
+#else
+ // Memory consumption under ThreadSanitizer is a serious concern,
+ // so we release resources sooner. The value of 1 leads to 1 to 2 second
+ // delay before marking a thread as idle.
+ static const int kIdlePeriods = 1;
+#endif
+
+ private:
+#if ABSL_WAITER_MODE == ABSL_WAITER_MODE_FUTEX
+ // Futexes are defined by specification to be 32-bits.
+ // Thus std::atomic<int32_t> must be just an int32_t with lockfree methods.
+ std::atomic<int32_t> futex_;
+ static_assert(sizeof(int32_t) == sizeof(futex_), "Wrong size for futex");
+
+#elif ABSL_WAITER_MODE == ABSL_WAITER_MODE_CONDVAR
+ // REQUIRES: mu_ must be held.
+ void InternalCondVarPoke();
+
+ pthread_mutex_t mu_;
+ pthread_cond_t cv_;
+ int waiter_count_;
+ int wakeup_count_; // Unclaimed wakeups.
+
+#elif ABSL_WAITER_MODE == ABSL_WAITER_MODE_SEM
+ sem_t sem_;
+ // This seems superfluous, but for Poke() we need to cause spurious
+ // wakeups on the semaphore. Hence we can't actually use the
+ // semaphore's count.
+ std::atomic<int> wakeups_;
+
+#elif ABSL_WAITER_MODE == ABSL_WAITER_MODE_WIN32
+ // WinHelper - Used to define utilities for accessing the lock and
+ // condition variable storage once the types are complete.
+ class WinHelper;
+
+ // REQUIRES: WinHelper::GetLock(this) must be held.
+ void InternalCondVarPoke();
+
// We can't include Windows.h in our headers, so we use aligned charachter
// buffers to define the storage of SRWLOCK and CONDITION_VARIABLE.
alignas(void*) unsigned char mu_storage_[sizeof(void*)];
alignas(void*) unsigned char cv_storage_[sizeof(void*)];
- int waiter_count_;
- int wakeup_count_;
-
-#else
- #error Unknown ABSL_WAITER_MODE
-#endif
-};
-
-} // namespace synchronization_internal
+ int waiter_count_;
+ int wakeup_count_;
+
+#else
+ #error Unknown ABSL_WAITER_MODE
+#endif
+};
+
+} // namespace synchronization_internal
ABSL_NAMESPACE_END
} // namespace y_absl
-
-#endif // ABSL_SYNCHRONIZATION_INTERNAL_WAITER_H_
+
+#endif // ABSL_SYNCHRONIZATION_INTERNAL_WAITER_H_