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noexcept and constexpr applied to <mutex>.

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@160604 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Howard Hinnant
2012-07-21 16:13:09 +00:00
parent 46623a09ee
commit 499c61f999
4 changed files with 65 additions and 54 deletions
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49
include/__mutex_base
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@@ -39,9 +39,9 @@ class _LIBCPP_VISIBLE mutex
public:
_LIBCPP_INLINE_VISIBILITY
#ifndef _LIBCPP_HAS_NO_CONSTEXPR
constexpr mutex() : __m_ PTHREAD_MUTEX_INITIALIZER {}
constexpr mutex() _NOEXCEPT : __m_ PTHREAD_MUTEX_INITIALIZER {}
#else
mutex() {__m_ = (pthread_mutex_t)PTHREAD_MUTEX_INITIALIZER;}
mutex() _NOEXCEPT {__m_ = (pthread_mutex_t)PTHREAD_MUTEX_INITIALIZER;}
#endif
~mutex();
@@ -51,8 +51,8 @@ private:
public:
void lock();
bool try_lock();
void unlock();
bool try_lock() _NOEXCEPT;
void unlock() _NOEXCEPT;
typedef pthread_mutex_t* native_handle_type;
_LIBCPP_INLINE_VISIBILITY native_handle_type native_handle() {return &__m_;}
@@ -62,17 +62,19 @@ struct _LIBCPP_VISIBLE defer_lock_t {};
struct _LIBCPP_VISIBLE try_to_lock_t {};
struct _LIBCPP_VISIBLE adopt_lock_t {};
//constexpr
extern const
defer_lock_t defer_lock;
#if defined(_LIBCPP_HAS_NO_CONSTEXPR) || defined(_LIBCPP_BUILDING_MUTEX)
//constexpr
extern const
try_to_lock_t try_to_lock;
extern const defer_lock_t defer_lock;
extern const try_to_lock_t try_to_lock;
extern const adopt_lock_t adopt_lock;
//constexpr
extern const
adopt_lock_t adopt_lock;
#else
constexpr defer_lock_t defer_lock = defer_lock_t();
constexpr try_to_lock_t try_to_lock = try_to_lock_t();
constexpr adopt_lock_t adopt_lock = adopt_lock_t();
#endif
template <class _Mutex>
class _LIBCPP_VISIBLE lock_guard
@@ -110,12 +112,12 @@ private:
public:
_LIBCPP_INLINE_VISIBILITY
unique_lock() : __m_(nullptr), __owns_(false) {}
unique_lock() _NOEXCEPT : __m_(nullptr), __owns_(false) {}
_LIBCPP_INLINE_VISIBILITY
explicit unique_lock(mutex_type& __m)
: __m_(&__m), __owns_(true) {__m_->lock();}
_LIBCPP_INLINE_VISIBILITY
unique_lock(mutex_type& __m, defer_lock_t)
unique_lock(mutex_type& __m, defer_lock_t) _NOEXCEPT
: __m_(&__m), __owns_(false) {}
_LIBCPP_INLINE_VISIBILITY
unique_lock(mutex_type& __m, try_to_lock_t)
@@ -145,11 +147,11 @@ private:
public:
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
_LIBCPP_INLINE_VISIBILITY
unique_lock(unique_lock&& __u)
unique_lock(unique_lock&& __u) _NOEXCEPT
: __m_(__u.__m_), __owns_(__u.__owns_)
{__u.__m_ = nullptr; __u.__owns_ = false;}
_LIBCPP_INLINE_VISIBILITY
unique_lock& operator=(unique_lock&& __u)
unique_lock& operator=(unique_lock&& __u) _NOEXCEPT
{
if (__owns_)
__m_->unlock();
@@ -194,13 +196,13 @@ public:
void unlock();
_LIBCPP_INLINE_VISIBILITY
void swap(unique_lock& __u)
void swap(unique_lock& __u) _NOEXCEPT
{
_VSTD::swap(__m_, __u.__m_);
_VSTD::swap(__owns_, __u.__owns_);
}
_LIBCPP_INLINE_VISIBILITY
mutex_type* release()
mutex_type* release() _NOEXCEPT
{
mutex_type* __m = __m_;
__m_ = nullptr;
@@ -209,12 +211,12 @@ public:
}
_LIBCPP_INLINE_VISIBILITY
bool owns_lock() const {return __owns_;}
bool owns_lock() const _NOEXCEPT {return __owns_;}
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_EXPLICIT
operator bool () const {return __owns_;}
operator bool () const _NOEXCEPT {return __owns_;}
_LIBCPP_INLINE_VISIBILITY
mutex_type* mutex() const {return __m_;}
mutex_type* mutex() const _NOEXCEPT {return __m_;}
};
template <class _Mutex>
@@ -280,7 +282,8 @@ unique_lock<_Mutex>::unlock()
template <class _Mutex>
inline _LIBCPP_INLINE_VISIBILITY
void
swap(unique_lock<_Mutex>& __x, unique_lock<_Mutex>& __y) {__x.swap(__y);}
swap(unique_lock<_Mutex>& __x, unique_lock<_Mutex>& __y) _NOEXCEPT
{__x.swap(__y);}
struct _LIBCPP_VISIBLE cv_status
{