Refactor pthread usage of libcxx. This patch extracts out all the pthread dependencies of libcxx into the new header __threading_support. The motivation is to make it easy to re-target libcxx into platforms that do not support pthread. Original patch from Fulvio Esposito (fulvio.esposito@outlook.com) - D11781 Applied with tweaks - D19412 Change-Id: I301111f0075de93dd8129416e06babc195aa936b git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@268734 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/thread b/include/thread index bf5b8e8..3ce32fc 100644 --- a/include/thread +++ b/include/thread
@@ -98,8 +98,7 @@ #ifndef _LIBCPP_HAS_NO_VARIADICS #include <tuple> #endif -#include <pthread.h> -#include <sched.h> +#include <__threading_support> #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) #pragma GCC system_header @@ -137,7 +136,7 @@ template <class _Tp> class __thread_specific_ptr { - pthread_key_t __key_; + __libcpp_tl_key __key_; // Only __thread_local_data() may construct a __thread_specific_ptr // and only with _Tp == __thread_struct. @@ -155,7 +154,7 @@ ~__thread_specific_ptr(); _LIBCPP_INLINE_VISIBILITY - pointer get() const {return static_cast<_Tp*>(pthread_getspecific(__key_));} + pointer get() const {return static_cast<_Tp*>(__libcpp_tl_get(__key_));} _LIBCPP_INLINE_VISIBILITY pointer operator*() const {return *get();} _LIBCPP_INLINE_VISIBILITY @@ -174,7 +173,9 @@ template <class _Tp> __thread_specific_ptr<_Tp>::__thread_specific_ptr() { - int __ec = pthread_key_create(&__key_, &__thread_specific_ptr::__at_thread_exit); + int __ec = __libcpp_tl_create( + &__key_, + &__thread_specific_ptr::__at_thread_exit); #ifndef _LIBCPP_NO_EXCEPTIONS if (__ec) throw system_error(error_code(__ec, system_category()), @@ -196,7 +197,7 @@ __thread_specific_ptr<_Tp>::release() { pointer __p = get(); - pthread_setspecific(__key_, 0); + __libcpp_tl_set(__key_, nullptr); return __p; } @@ -205,7 +206,7 @@ __thread_specific_ptr<_Tp>::reset(pointer __p) { pointer __p_old = get(); - pthread_setspecific(__key_, __p); + __libcpp_tl_set(__key_, __p); delete __p_old; } @@ -226,7 +227,7 @@ // FIXME: pthread_t is a pointer on Darwin but a long on Linux. // NULL is the no-thread value on Darwin. Someone needs to check // on other platforms. We assume 0 works everywhere for now. - pthread_t __id_; + __libcpp_thread_id __id_; public: _LIBCPP_INLINE_VISIBILITY @@ -234,13 +235,13 @@ friend _LIBCPP_INLINE_VISIBILITY bool operator==(__thread_id __x, __thread_id __y) _NOEXCEPT - {return __x.__id_ == __y.__id_;} + {return __libcpp_thread_id_equal(__x.__id_, __y.__id_);} friend _LIBCPP_INLINE_VISIBILITY bool operator!=(__thread_id __x, __thread_id __y) _NOEXCEPT {return !(__x == __y);} friend _LIBCPP_INLINE_VISIBILITY bool operator< (__thread_id __x, __thread_id __y) _NOEXCEPT - {return __x.__id_ < __y.__id_;} + {return __libcpp_thread_id_less(__x.__id_, __y.__id_);} friend _LIBCPP_INLINE_VISIBILITY bool operator<=(__thread_id __x, __thread_id __y) _NOEXCEPT {return !(__y < __x);} @@ -260,7 +261,7 @@ private: _LIBCPP_INLINE_VISIBILITY - __thread_id(pthread_t __id) : __id_(__id) {} + __thread_id(__libcpp_thread_id __id) : __id_(__id) {} friend __thread_id this_thread::get_id() _NOEXCEPT; friend class _LIBCPP_TYPE_VIS thread; @@ -274,7 +275,7 @@ _LIBCPP_INLINE_VISIBILITY size_t operator()(__thread_id __v) const { - return hash<pthread_t>()(__v.__id_); + return hash<__libcpp_thread_id>()(__v.__id_); } }; @@ -285,20 +286,20 @@ __thread_id get_id() _NOEXCEPT { - return pthread_self(); + return __libcpp_thread_get_current_id(); } } // this_thread class _LIBCPP_TYPE_VIS thread { - pthread_t __t_; + __libcpp_thread_t __t_; thread(const thread&); thread& operator=(const thread&); public: typedef __thread_id id; - typedef pthread_t native_handle_type; + typedef __libcpp_thread_t native_handle_type; _LIBCPP_INLINE_VISIBILITY thread() _NOEXCEPT : __t_(0) {} @@ -330,7 +331,7 @@ void join(); void detach(); _LIBCPP_INLINE_VISIBILITY - id get_id() const _NOEXCEPT {return __t_;} + id get_id() const _NOEXCEPT {return __libcpp_thread_get_id(&__t_);} _LIBCPP_INLINE_VISIBILITY native_handle_type native_handle() _NOEXCEPT {return __t_;} @@ -370,7 +371,7 @@ new _Gp(std::move(__tsp), __decay_copy(_VSTD::forward<_Fp>(__f)), __decay_copy(_VSTD::forward<_Args>(__args))...)); - int __ec = pthread_create(&__t_, 0, &__thread_proxy<_Gp>, __p.get()); + int __ec = __libcpp_thread_create(&__t_, &__thread_proxy<_Gp>, __p.get()); if (__ec == 0) __p.release(); else @@ -405,7 +406,7 @@ typedef __thread_invoke_pair<_Fp> _InvokePair; typedef std::unique_ptr<_InvokePair> _PairPtr; _PairPtr __pp(new _InvokePair(__f)); - int __ec = pthread_create(&__t_, 0, &__thread_proxy_cxx03<_InvokePair>, __pp.get()); + int __ec = __libcpp_thread_create(&__t_, &__thread_proxy_cxx03<_InvokePair>, __pp.get()); if (__ec == 0) __pp.release(); else @@ -480,7 +481,7 @@ } inline _LIBCPP_INLINE_VISIBILITY -void yield() _NOEXCEPT {sched_yield();} +void yield() _NOEXCEPT {__libcpp_thread_yield();} } // this_thread 