Export of internal Abseil changes

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baf626d27ff1547776745f3b601cc42f703d4bdf by Greg Falcon <gfalcon@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 315486679

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39d4e7f9214c5a74e4ee4b8a7f4af26479925029 by Gennadiy Rozental <rogeeff@google.com>:

Avoid order dependant test cases.

PiperOrigin-RevId: 315327948

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8feb187703a28bb0c5cfc5dd6091e3faa90a8e61 by Gennadiy Rozental <rogeeff@google.com>:

Avoid order dependant test cases.

PiperOrigin-RevId: 315317018

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cffd8fddad15908ec9de7f21f65b20528972e3fa by Gennadiy Rozental <rogeeff@google.com>:

Avoid order dependant test cases.

PiperOrigin-RevId: 315311587

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48997a0ceb231b75c14eb4b1eb3b66af69e49f42 by Tom Manshreck <shreck@google.com>:

Nit: remove extra "the"

PiperOrigin-RevId: 314959763

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9516f44a4b5d3055427c95e80c8c04a6321e4221 by Gennadiy Rozental <rogeeff@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 314925147

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4f8691d74a4eb42ed03ef29c9588a01b78829941 by Abseil Team <absl-team@google.com>:

Uninclude util/bits/bits.h

PiperOrigin-RevId: 314858384

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02b42a8ec5e5561b29b4e5f93cc1482c3c72ef2d by Abseil Team <absl-team@google.com>:

Google-internal changes only.

PiperOrigin-RevId: 314855667

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146013d69dabafbe2030e23ced7b741d9e8d417c by Gennadiy Rozental <rogeeff@google.com>:

Uninclude util/bits/bits.h

PiperOrigin-RevId: 314838927
GitOrigin-RevId: baf626d27ff1547776745f3b601cc42f703d4bdf
Change-Id: I2602286fb13cf35a88bdd80fe0b44974d4388d46

1 files changed, 0 insertions, 7 deletions

diff --git a/absl/synchronization/mutex.cc b/absl/synchronization/mutex.cc
index 36c93d5f..1f8a696e 100644
--- a/absl/synchronization/mutex.cc
+++ b/absl/synchronization/mutex.cc
@@ -58,7 +58,6 @@
 
 using absl::base_internal::CurrentThreadIdentityIfPresent;
 using absl::base_internal::PerThreadSynch;
-using absl::base_internal::SchedulingGuard;
 using absl::base_internal::ThreadIdentity;
 using absl::synchronization_internal::GetOrCreateCurrentThreadIdentity;
 using absl::synchronization_internal::GraphCycles;
@@ -1109,7 +1108,6 @@ void Mutex::TryRemove(PerThreadSynch *s) {
 // on the mutex queue.  In this case, remove "s" from the queue and return
 // true, otherwise return false.
 ABSL_XRAY_LOG_ARGS(1) void Mutex::Block(PerThreadSynch *s) {
-  SchedulingGuard::ScopedDisable disable_rescheduling;
   while (s->state.load(std::memory_order_acquire) == PerThreadSynch::kQueued) {
     if (!DecrementSynchSem(this, s, s->waitp->timeout)) {
       // After a timeout, we go into a spin loop until we remove ourselves
@@ -1899,7 +1897,6 @@ static void CheckForMutexCorruption(intptr_t v, const char* label) {
 }
 
 void Mutex::LockSlowLoop(SynchWaitParams *waitp, int flags) {
-  SchedulingGuard::ScopedDisable disable_rescheduling;
   int c = 0;
   intptr_t v = mu_.load(std::memory_order_relaxed);
   if ((v & kMuEvent) != 0) {
@@ -2019,7 +2016,6 @@ void Mutex::LockSlowLoop(SynchWaitParams *waitp, int flags) {
 // or it is in the process of blocking on a condition variable; it must requeue
 // itself on the mutex/condvar to wait for its condition to become true.
 ABSL_ATTRIBUTE_NOINLINE void Mutex::UnlockSlow(SynchWaitParams *waitp) {
-  SchedulingGuard::ScopedDisable disable_rescheduling;
   intptr_t v = mu_.load(std::memory_order_relaxed);
   this->AssertReaderHeld();
   CheckForMutexCorruption(v, "Unlock");
@@ -2335,7 +2331,6 @@ void Mutex::Trans(MuHow how) {
 // It will later acquire the mutex with high probability.  Otherwise, we
 // enqueue thread w on this mutex.
 void Mutex::Fer(PerThreadSynch *w) {
-  SchedulingGuard::ScopedDisable disable_rescheduling;
   int c = 0;
   ABSL_RAW_CHECK(w->waitp->cond == nullptr,
                  "Mutex::Fer while waiting on Condition");
@@ -2434,7 +2429,6 @@ CondVar::~CondVar() {
 
 // Remove thread s from the list of waiters on this condition variable.
 void CondVar::Remove(PerThreadSynch *s) {
-  SchedulingGuard::ScopedDisable disable_rescheduling;
   intptr_t v;
   int c = 0;
   for (v = cv_.load(std::memory_order_relaxed);;
@@ -2595,7 +2589,6 @@ void CondVar::Wakeup(PerThreadSynch *w) {
 }
 
 void CondVar::Signal() {
-  SchedulingGuard::ScopedDisable disable_rescheduling;
   ABSL_TSAN_MUTEX_PRE_SIGNAL(nullptr, 0);
   intptr_t v;
   int c = 0;