Export of internal Abseil changes

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90ecacd2a3db96ee64ef23af37a80fad404e2b32 by Gennadiy Rozental <rogeeff@google.com>:

Fixes MSVC regression by making MSVC version of class Flag into an aggregate type.

PiperOrigin-RevId: 277767054

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018f3b040df51d91a988fa146fee163721e605e9 by Abseil Team <absl-team@google.com>:

Change libstdc++ lacking std::unique_ptr check from a gcc version check to based on feature macros.

PiperOrigin-RevId: 277736042

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475844775ae343e2414318f08549ee3fa6676a8d by CJ Johnson <johnsoncj@google.com>:

Pass allocator_type through allocator_traits before extracting the typedefs

PiperOrigin-RevId: 277730393

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d843bc4bc30bf5b11af76db8beda8634b6111a62 by Abseil Team <absl-team@google.com>:

Convert the Waiter::Init() method to the default constructor and define
a destructor for the Waiter class.

Use placement new and delete with Waiter objects.

PiperOrigin-RevId: 277728823

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1ba6edf421dd2dfe13c55970a03c99592cb6677d by Derek Mauro <dmauro@google.com>:

Use lowercase spelling for include of dbghelp.h
When cross-compiling under MinGW this is important

PiperOrigin-RevId: 277629783

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cfc662a6fa357a84ddda8037156c7f26cee40c36 by Abseil Team <absl-team@google.com>:

Don't use atomic ops on waiter and wakeup counts in WIN32 waiter mode.

Port the new CONDVAR waiter mode code in CL 277366017 to the WIN32
waiter mode.

PiperOrigin-RevId: 277603611

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833106542e61fa0832900adf3c1b2afc6890b94b by Abseil Team <absl-team@google.com>:

Add the PerThreadSem::Destroy() method.

For ABSL_WAITER_MODE_CONDVAR or ABSL_WAITER_MODE_SEM,
PerThreadSem::Destroy() is used to destroy the pthread mutex and
condition variable or the POSIX semaphore.
PiperOrigin-RevId: 277586675

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7814da4a59106cf1e0e4db1a31b9592ebbd2094b by Samuel Benzaquen <sbenza@google.com>:

Enable the assertion in the iterator's operator* and operator->

PiperOrigin-RevId: 277563401
GitOrigin-RevId: 90ecacd2a3db96ee64ef23af37a80fad404e2b32
Change-Id: Ib19be3680da74f0b94055c9039115ec6bcaea7b0

1 files changed, 5 insertions, 1 deletions

diff --git a/absl/synchronization/internal/per_thread_sem.cc b/absl/synchronization/internal/per_thread_sem.cc
index b7014fb2b02d..2a78b20fc883 100644
--- a/absl/synchronization/internal/per_thread_sem.cc
+++ b/absl/synchronization/internal/per_thread_sem.cc
@@ -40,12 +40,16 @@ std::atomic<int> *PerThreadSem::GetThreadBlockedCounter() {
 }
 
 void PerThreadSem::Init(base_internal::ThreadIdentity *identity) {
-  Waiter::GetWaiter(identity)->Init();
+  new (Waiter::GetWaiter(identity)) Waiter();
   identity->ticker.store(0, std::memory_order_relaxed);
   identity->wait_start.store(0, std::memory_order_relaxed);
   identity->is_idle.store(false, std::memory_order_relaxed);
 }
 
+void PerThreadSem::Destroy(base_internal::ThreadIdentity *identity) {
+  Waiter::GetWaiter(identity)->~Waiter();
+}
+
 void PerThreadSem::Tick(base_internal::ThreadIdentity *identity) {
   const int ticker =
       identity->ticker.fetch_add(1, std::memory_order_relaxed) + 1;