compnerd updated this revision to Diff 82846.
compnerd added a comment.
add more context
Repository:
rL LLVM
https://reviews.llvm.org/D28220
Files:
include/__config
include/__threading_support
Index: include/__threading_support
===================================================================
--- include/__threading_support
+++ include/__threading_support
@@ -32,9 +32,20 @@
#include <__external_threading>
#else
+#if !defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && \
+ !defined(_LIBCPP_HAS_THREAD_API_WIN32)
+#error "unknown threading model"
+#endif
+
#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
#include <pthread.h>
#include <sched.h>
+#elif defined(_LIBCPP_HAS_THREAD_API_WIN32)
+#define WIN32_LEAN_AND_MEAN
+#define VC_EXTRA_LEAN
+#include <Windows.h>
+#include <process.h>
+#include <fibersapi.h>
#endif
#if defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
@@ -64,6 +75,25 @@
// Thrad Local Storage
typedef pthread_key_t __libcpp_tls_key;
+#elif defined(_LIBCPP_HAS_THREAD_API_WIN32)
+// Mutex
+typedef SRWLOCK __libcpp_mutex_t;
+#define _LIBCPP_MUTEX_INITIALIZER SRWLOCK_INIT
+
+typedef CRITICAL_SECTION __libcpp_recursive_mutex_t;
+
+// Condition Variable
+typedef CONDITION_VARIABLE __libcpp_condvar_t;
+#define _LIBCPP_CONDVAR_INITIALIZER CONDITION_VARIABLE_INIT
+
+// Thread ID
+typedef DWORD __libcpp_thread_id;
+
+// Thread
+typedef HANDLE __libcpp_thread_t;
+
+// Thread Local Storage
+typedef DWORD __libcpp_tls_key;
#endif
struct __libcpp_mutex_reference {
@@ -306,6 +336,192 @@
pthread_setspecific(__key, __p);
}
+#elif defined(_LIBCPP_HAS_THREAD_API_WIN32)
+
+// Mutex
+_LIBCPP_ALWAYS_INLINE
+int __libcpp_recursive_mutex_init(__libcpp_recursive_mutex_t* __m)
+{
+ InitializeCriticalSection(__m);
+ return 0;
+}
+
+_LIBCPP_ALWAYS_INLINE
+int __libcpp_mutex_lock(__libcpp_mutex_reference&& __m)
+{
+ if (__m.__recursive)
+ EnterCriticalSection(__m);
+ else
+ AcquireSRWLockExclusive(__m);
+ return 0;
+}
+
+_LIBCPP_ALWAYS_INLINE
+int __libcpp_mutex_trylock(__libcpp_mutex_reference&& __m)
+{
+ if (__m.__recursive)
+ return TryEnterCriticalSection(__m);
+ return TryAcquireSRWLockExclusive(__m);
+}
+
+_LIBCPP_ALWAYS_INLINE
+int __libcpp_mutex_unlock(__libcpp_mutex_reference&& __m)
+{
+ if (__m.__recursive)
+ LeaveCriticalSection(__m);
+ else
+ ReleaseSRWLockExclusive(__m);
+ return 0;
+}
+
+_LIBCPP_ALWAYS_INLINE
+int __libcpp_mutex_destroy(__libcpp_mutex_reference&& __m)
+{
+ static_cast<void>(__m);
+ return 0;
+}
+
+// Condition Variable
+_LIBCPP_ALWAYS_INLINE
+int __libcpp_condvar_signal(__libcpp_condvar_t* __cv)
+{
+ WakeConditionVariable(__cv);
+ return 0;
+}
+
+_LIBCPP_ALWAYS_INLINE
+int __libcpp_condvar_broadcast(__libcpp_condvar_t* __cv)
+{
+ WakeAllConditionVariable(__cv);
+ return 0;
+}
+
+_LIBCPP_ALWAYS_INLINE
+int __libcpp_condvar_wait(__libcpp_condvar_t* __cv,
+ __libcpp_mutex_reference&& __m)
+{
+ if (__m.__recursive)
+ SleepConditionVariableCS(__cv, __m, INFINITE);
+ else
+ SleepConditionVariableSRW(__cv, __m, INFINITE, 0);
+ return 0;
+}
+
+_LIBCPP_ALWAYS_INLINE
+int __libcpp_condvar_timedwait(__libcpp_condvar_t* __cv,
+ __libcpp_mutex_reference&& __m,
+ timespec* __ts)
+{
+ using namespace _VSTD::chrono;
+ auto timeout = seconds(__ts->tv_sec) + nanoseconds(__ts->tv_nsec);
+
+ // TODO(compnerd) handle timeouts < 10ms
+ if (__m.__recursive) {
+ if (!SleepConditionVariableCS(__cv, __m,
+ duration_cast<milliseconds>(timeout).count()))
+ return GetLastError();
+ } else {
+ if (!SleepConditionVariableSRW(__cv, __m,
+ duration_cast<milliseconds>(timeout).count(),
+ 0))
+ return GetLastError();
+ }
+ return 0;
+}
+
+_LIBCPP_ALWAYS_INLINE
+int __libcpp_condvar_destroy(__libcpp_condvar_t* __cv)
+{
+ static_cast<void>(__cv);
+ return 0;
+}
+
+// Thread ID
+_LIBCPP_ALWAYS_INLINE
+bool __libcpp_thread_id_equal(__libcpp_thread_id __lhs,
+ __libcpp_thread_id __rhs)
+{
+ return __lhs == __rhs;
+}
+
+_LIBCPP_ALWAYS_INLINE
+bool __libcpp_thread_id_less(__libcpp_thread_id __lhs, __libcpp_thread_id __rhs)
+{
+ return __lhs < __rhs;
+}
+
+// Thread
+_LIBCPP_ALWAYS_INLINE
+int __libcpp_thread_create(__libcpp_thread_t* __t, void* (*__func)(void*),
+ void* __arg)
+{
+ // TODO(compnerd) provide a wrapper for CC adjustment
+ *__t = reinterpret_cast<HANDLE>(_beginthreadex(
+ NULL, 0, (unsigned int(WINAPI*)(void*))__func, __arg, 0, NULL));
+ if (*__t)
+ return 0;
+ return GetLastError();
+}
+
+_LIBCPP_ALWAYS_INLINE
+__libcpp_thread_id __libcpp_thread_get_current_id()
+{
+ return GetCurrentThreadId();
+}
+
+_LIBCPP_ALWAYS_INLINE
+__libcpp_thread_id __libcpp_thread_get_id(const __libcpp_thread_t* __t)
+{
+ return GetThreadId(*__t);
+}
+
+_LIBCPP_ALWAYS_INLINE
+int __libcpp_thread_join(__libcpp_thread_t* __t)
+{
+ if (WaitForSingleObjectEx(*__t, INFINITE, FALSE) == WAIT_FAILED)
+ return GetLastError();
+ if (!CloseHandle(*__t))
+ return GetLastError();
+ return 0;
+}
+
+_LIBCPP_ALWAYS_INLINE
+int __libcpp_thread_detach(__libcpp_thread_t* __t)
+{
+ if (!CloseHandle(*__t))
+ return GetLastError();
+ return 0;
+}
+
+_LIBCPP_ALWAYS_INLINE
+void __libcpp_thread_yield()
+{
+ SwitchToThread();
+}
+
+// Thread Local Storage
+_LIBCPP_ALWAYS_INLINE
+int __libcpp_tls_create(__libcpp_tls_key* __key, void (*__at_exit)(void*))
+{
+ // TODO(compnerd) provide a wrapper for CC adjustment
+ *__key = FlsAlloc((void(WINAPI*)(void*))__at_exit);
+ if (*__key == FLS_OUT_OF_INDEXES)
+ return GetLastError();
+ return 0;
+}
+
+_LIBCPP_ALWAYS_INLINE
+void* __libcpp_tls_get(__libcpp_tls_key __key)
+{
+ return FlsGetValue(__key);
+}
+
+_LIBCPP_ALWAYS_INLINE
+void __libcpp_tls_set(__libcpp_tls_key __key, void* __p)
+{
+ FlsSetValue(__key, __p);
+}
+
#endif // _LIBCPP_HAS_THREAD_API_PTHREAD
_LIBCPP_END_NAMESPACE_STD
Index: include/__config
===================================================================
--- include/__config
+++ include/__config
@@ -882,6 +882,8 @@
defined(__CloudABI__) || \
defined(__sun__)
# define _LIBCPP_HAS_THREAD_API_PTHREAD
+# elif defined(_WIN32)
+# define _LIBCPP_HAS_THREAD_API_WIN32
# else
# error "No thread API"
# endif // _LIBCPP_HAS_THREAD_API
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