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Export of internal Abseil changes.

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ed3a3431eee9e48e6553b0320e0308d2dde6725c by Derek Mauro <dmauro@google.com>:

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PiperOrigin-RevId: 258631680
GitOrigin-RevId: ed3a3431eee9e48e6553b0320e0308d2dde6725c
Change-Id: I1d7ae86a79783842092d29504605ba039c369603
This commit is contained in:
Abseil Team 2019-07-17 16:35:47 -04:00 • committed by Derek Mauro
parent 44efe96dfc
commit c6c3c1b498
32 changed files with 1168 additions and 657 deletions
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26
absl/flags/flag.cc
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@ -24,24 +24,16 @@ namespace absl {
// so in debug builds we always use the slower implementation, which always
// validates the type.
#ifndef NDEBUG
#define ABSL_FLAGS_ATOMIC_GET(T) \
T GetFlag(const absl::Flag<T>& flag) { \
T result; \
flag.internal.Read(&result, &flags_internal::FlagOps<T>); \
return result; \
}
#define ABSL_FLAGS_ATOMIC_GET(T) \
T GetFlag(const absl::Flag<T>& flag) { return flag.Get(); }
#else
#define ABSL_FLAGS_ATOMIC_GET(T) \
T GetFlag(const absl::Flag<T>& flag) { \
const int64_t r = flag.internal.atomic.load(std::memory_order_acquire); \
if (r != flags_internal::CommandLineFlag::kAtomicInit) { \
T t; \
memcpy(&t, &r, sizeof(T)); \
return t; \
} \
T result; \
flag.internal.Read(&result, &flags_internal::FlagOps<T>); \
return result; \
#define ABSL_FLAGS_ATOMIC_GET(T) \
T GetFlag(const absl::Flag<T>& flag) { \
T result; \
if (flag.AtomicGet(&result)) { \
return result; \
} \
return flag.Get(); \
}
#endif