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Export of internal Abseil changes

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00f5301405423005d9129935c05f20155536cc1a by CJ Johnson <johnsoncj@google.com>:

Removes usage of std::aligned_storage from Abseil implementation details

PiperOrigin-RevId: 296492301

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fc11d15f91764612fba080669d2381dc181df52b by Abseil Team <absl-team@google.com>:

Fix absl::bind_front documentation.

PiperOrigin-RevId: 296482945

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0164c595c129c46bf21ae74eba5399a1da5f140b by Gennadiy Rozental <rogeeff@google.com>:

Automated g4 rollback of changelist 296320700.

PiperOrigin-RevId: 296439968

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1eb295700758ca0894d872b2de7c675b4ad679af by Abseil Team <absl-team@google.com>:

Removes duplicate comments.

PiperOrigin-RevId: 296433214

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c30c01caae02d2fa4ef783d988de6bebb9757c39 by Derek Mauro <dmauro@google.com>:

Merge GitHub #621: Add RISCV support to GetProgramCounter()

Fixes #621

PiperOrigin-RevId: 296351174

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95d4498167596fd7543e025bdfe9a8da9e2ca3c8 by Abseil Team <absl-team@google.com>:

Automated g4 rollback of changelist 296320700.

PiperOrigin-RevId: 296348701

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b193f0543e0cec54dddb2ed51f45dc489c8d06d5 by Gennadiy Rozental <rogeeff@google.com>:

Change TryParse interface to return managed value.

In addition introduce companion StoreValue routine which consumes pointer to source value and stores the value inside of FlagImpl. In a follow up CL we will change StoreValue implementation to behave differently depending on "value storage kind".
We also rename default_src_ to default_value_.

PiperOrigin-RevId: 296320700

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57e942b485d12912a0a8d0d0b35fa2a62847020f by Derek Mauro <dmauro@google.com>:

Merge GitHub #622
 * Add missing #ifdef conditionals for ABSL_HAVE_VDSO_SUPPORT

PiperOrigin-RevId: 296272830
GitOrigin-RevId: 00f5301405423005d9129935c05f20155536cc1a
Change-Id: I1b05eeaf1280f95fb0a2c5f3654995a87c792893
This commit is contained in:
Abseil Team 2020-02-21 12:51:36 -08:00 • committed by CJ Johnson
parent 2a5633fc07
commit b69c7d880c
16 changed files with 131 additions and 135 deletions
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13
absl/synchronization/internal/waiter.h
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@ -133,13 +133,6 @@ class Waiter {
std::atomic<int> wakeups_;
#elif ABSL_WAITER_MODE == ABSL_WAITER_MODE_WIN32
// We can't include Windows.h in our headers, so we use aligned storage
// buffers to define the storage of SRWLOCK and CONDITION_VARIABLE.
using SRWLockStorage =
typename std::aligned_storage<sizeof(void*), alignof(void*)>::type;
using ConditionVariableStorage =
typename std::aligned_storage<sizeof(void*), alignof(void*)>::type;
// WinHelper - Used to define utilities for accessing the lock and
// condition variable storage once the types are complete.
class WinHelper;
@ -147,8 +140,10 @@ class Waiter {
// REQUIRES: WinHelper::GetLock(this) must be held.
void InternalCondVarPoke();
SRWLockStorage mu_storage_;
ConditionVariableStorage cv_storage_;
// 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_;