X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=common%2Fos_thread.hpp;h=2c3f73250893e9beba24bc84781acedf8f1e4775;hb=93d51c3065260cdb088f33d3e6d5bdfb4707c1a9;hp=bf4c8eaac5e99dd08bde3ef17670cefdfc605911;hpb=4a3ccab160b3197933b9fdf02d924370b7e48a79;p=apitrace

diff --git a/common/os_thread.hpp b/common/os_thread.hpp
index bf4c8ea..2c3f732 100644
--- a/common/os_thread.hpp
+++ b/common/os_thread.hpp
@@ -24,9 +24,9 @@
  **************************************************************************/
 
 /*
- * Simple OS abstraction.
+ * OS native thread abstraction.
  *
- * Mimics C++11 / boost threads.
+ * Mimics C++11 threads.
  */
 
 #ifndef _OS_THREAD_HPP_
@@ -39,6 +39,27 @@
 #include <pthread.h>
 #endif
 
+
+#define USE_WIN32_CONDITION_VARIABLES 0
+
+
+/**
+ * Compiler TLS.
+ *
+ * See also:
+ * - http://gcc.gnu.org/onlinedocs/gcc-4.6.3/gcc/Thread_002dLocal.html
+ * - http://msdn.microsoft.com/en-us/library/9w1sdazb.aspx
+ */
+#if defined(_MSC_VER)
+#  define thread_specific __declspec(thread)
+#elif defined(__GNUC__)
+#  define thread_specific __thread
+#else
+#  define thread_specific
+#  error "Unsupported compiler"
+#endif
+
+
 namespace os {
 
 
@@ -185,16 +206,31 @@ namespace os {
      */
     class condition_variable
     {
-    public:
+    private:
 #ifdef _WIN32
+#  if USE_WIN32_CONDITION_VARIABLES
+        // XXX: Only supported on Vista an higher. Not yet supported by WINE.
         typedef CONDITION_VARIABLE native_handle_type;
+        native_handle_type _native_handle;
+#else
+        // http://www.cs.wustl.edu/~schmidt/win32-cv-1.html
+        LONG cWaiters;
+        HANDLE hEvent;
+#endif
 #else
         typedef pthread_cond_t native_handle_type;
+        native_handle_type _native_handle;
 #endif
 
+    public:
         condition_variable() {
 #ifdef _WIN32
+#  if USE_WIN32_CONDITION_VARIABLES
             InitializeConditionVariable(&_native_handle);
+#  else
+            cWaiters = 0;
+            hEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
+#  endif
 #else
             pthread_cond_init(&_native_handle, NULL);
 #endif
@@ -202,7 +238,11 @@ namespace os {
 
         ~condition_variable() {
 #ifdef _WIN32
+#  if USE_WIN32_CONDITION_VARIABLES
             /* No-op */
+#  else
+            CloseHandle(hEvent);
+#  endif
 #else
             pthread_cond_destroy(&_native_handle);
 #endif
@@ -211,7 +251,13 @@ namespace os {
         inline void
         signal(void) {
 #ifdef _WIN32
+#  if USE_WIN32_CONDITION_VARIABLES
             WakeConditionVariable(&_native_handle);
+#  else
+            if (cWaiters) {
+                SetEvent(hEvent);
+            }
+#  endif
 #else
             pthread_cond_signal(&_native_handle);
 #endif
@@ -221,119 +267,60 @@ namespace os {
         wait(unique_lock<mutex> & lock) {
             mutex::native_handle_type & mutex_native_handle = lock.mutex()->native_handle();
 #ifdef _WIN32
-            /* FIXME */
+#  if USE_WIN32_CONDITION_VARIABLES
             SleepConditionVariableCS(&_native_handle, &mutex_native_handle, INFINITE);
+#  else
+            InterlockedIncrement(&cWaiters);
+            LeaveCriticalSection(&mutex_native_handle);
+            WaitForSingleObject(hEvent, INFINITE);
+            EnterCriticalSection(&mutex_native_handle);
+            InterlockedDecrement(&cWaiters);
+#  endif
 #else
             pthread_cond_wait(&_native_handle, &mutex_native_handle);
 #endif
         }
-
-    protected:
-        native_handle_type _native_handle;
     };
 
 
     /**
-     * Same interface as boost::thread_specific_ptr.
+     * Same interface as std::thread
      */
-    template <typename T>
-    class thread_specific_ptr
-    {
-    private:
-#ifdef _WIN32
-        DWORD dwTlsIndex;
-#else
-        pthread_key_t key;
-
-        static void destructor(void *ptr) {
-            delete static_cast<T *>(ptr);
-        }
-#endif
-
+    class thread {
     public:
-        thread_specific_ptr(void) {
-#ifdef _WIN32
-            dwTlsIndex = TlsAlloc();
-#else
-            pthread_key_create(&key, &destructor);
-#endif
-        }
-
-        ~thread_specific_ptr() {
 #ifdef _WIN32
-            TlsFree(dwTlsIndex);
-#else
-            pthread_key_delete(key);
-#endif
-        }
-
-        T* get(void) const {
-            void *ptr;
-#ifdef _WIN32
-            ptr = TlsGetValue(dwTlsIndex);
+        typedef HANDLE native_handle_type;
 #else
-            ptr = pthread_getspecific(key);
+        typedef pthread_t native_handle_type;
 #endif
-            return static_cast<T*>(ptr);
-        }
 
-        T* operator -> (void) const
+        inline
+        thread() :
+            _native_handle(0)
         {
-            return get();
         }
 
-        T& operator * (void) const
+        inline
+        thread(const thread &other) :
+            _native_handle(other._native_handle)
         {
-            return *get();
         }
 
-        void reset(T* new_value=0) {
-            T * old_value = get();
-            set(new_value);
-            if (old_value) {
-                delete old_value;
-            }
-        }
-
-        T* release (void) {
-            T * old_value = get();
-            set(0);
-            return old_value;
-        }
-
-private:
-        void set(T* new_value) {
-#ifdef _WIN32
-            TlsSetValue(dwTlsIndex, new_value);
-#else
-            pthread_setspecific(key, new_value);
-#endif
-        }
-    };
-
-
-    /**
-     * Same interface as std::thread
-     */
-    class thread {
-    public:
-#ifdef _WIN32
-        typedef HANDLE native_handle_type;
-#else
-        typedef pthread_t native_handle_type;
-#endif
-
         template< class Function, class Arg >
-        explicit thread( Function& f, Arg & arg ) {
+        explicit thread( Function& f, Arg arg ) {
 #ifdef _WIN32
-            /* FIXME */
             DWORD id = 0;
             _native_handle = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)f, (LPVOID)arg, 0, &id);
 #else
-            pthread_create(&_native_handle, NULL, f, arg);
+            pthread_create(&_native_handle, NULL, (void *(*) (void *))f, (void *)arg);
 #endif
         }
 
+        inline bool
+        joinable(void) const {
+            return _native_handle != 0;
+        }
+
         inline void
         join() {
 #ifdef _WIN32