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Revert "[Support] Re-introduce the RWMutexImpl for macOS < 10.12" 

This doesn't work (yet).

llvm-svn: 369059
This commit is contained in:
Jonas Devlieghere 2019-08-15 22:24:21 +00:00
parent 67af3fa7ca
commit f64dcdea6d
1 changed files with 0 additions and 63 deletions
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63
llvm/include/llvm/Support/RWMutex.h
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@ -31,71 +31,8 @@ namespace sys {
// on Windows and always available on MSVC.
#if defined(_MSC_VER) || __cplusplus > 201402L
std::shared_mutex impl;
#else
// std::shared_timed_mutex is only availble on macOS 10.12 and later.
#if defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && \
defined(__MAC_10_12) && \
__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < __MAC_10_12
/// Platform agnostic RWMutex class.
/// Platform agnostic RWMutex class.
class RWMutexImpl {
/// @name Constructors
/// @{
public:
/// Initializes the lock but doesn't acquire it.
/// Default Constructor.
explicit RWMutexImpl();
/// @}
/// @name Do Not Implement
/// @{
RWMutexImpl(const RWMutexImpl &original) = delete;
RWMutexImpl &operator=(const RWMutexImpl &) = delete;
/// @}
/// Releases and removes the lock
/// Destructor
~RWMutexImpl();
/// @}
/// @name Methods
/// @{
public:
/// Attempts to unconditionally acquire the lock in reader mode. If the
/// lock is held by a writer, this method will wait until it can acquire
/// the lock.
/// @returns false if any kind of error occurs, true otherwise.
/// Unconditionally acquire the lock in reader mode.
bool reader_acquire();
/// Attempts to release the lock in reader mode.
/// @returns false if any kind of error occurs, true otherwise.
/// Unconditionally release the lock in reader mode.
bool reader_release();
/// Attempts to unconditionally acquire the lock in reader mode. If the
/// lock is held by any readers, this method will wait until it can
/// acquire the lock.
/// @returns false if any kind of error occurs, true otherwise.
/// Unconditionally acquire the lock in writer mode.
bool writer_acquire();
/// Attempts to release the lock in writer mode.
/// @returns false if any kind of error occurs, true otherwise.
/// Unconditionally release the lock in write mode.
bool writer_release();
//@}
/// @name Platform Dependent Data
/// @{
private:
#if defined(LLVM_ENABLE_THREADS) && LLVM_ENABLE_THREADS != 0
void *data_ = nullptr; ///< We don't know what the data will be
#endif
} impl;
#else
std::shared_timed_mutex impl;
#endif
#endif
unsigned readers = 0;
unsigned writers = 0;