Condition variable abstraction.

[apitrace] / common / os_thread.hpp

diff --git a/common/os_thread.hpp b/common/os_thread.hpp
index 7349255525276b47b36c3b5ba5aa7e3c4f4b6d81..e5eb19d3604c8dd61c47e5ccd22c4b57f1f72e28 100644 (file)
--- a/common/os_thread.hpp
+++ b/common/os_thread.hpp
@@ -32,6 +32,7 @@
 #ifndef _OS_THREAD_HPP_
 #define _OS_THREAD_HPP_
 
+
 #ifdef _WIN32
 #include <windows.h>
 #else
@@ -41,6 +42,198 @@
 namespace os {
 
 
+    /**
+     * Base class for mutex and recursive_mutex.
+     */
+    class _base_mutex
+    {
+    public:
+#ifdef _WIN32
+        typedef CRITICAL_SECTION native_handle_type;
+#else
+        typedef pthread_mutex_t native_handle_type;
+#endif
+
+        _base_mutex(void) {
+#ifdef _WIN32
+            InitializeCriticalSection(&_native_handle);
+#else
+            pthread_mutexattr_t attr;
+            pthread_mutexattr_init(&attr);
+            pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
+            pthread_mutex_init(&_native_handle, &attr);
+            pthread_mutexattr_destroy(&attr);
+#endif
+        }
+
+        ~_base_mutex() {
+#ifdef _WIN32
+            DeleteCriticalSection(&_native_handle);
+#else
+            pthread_mutex_destroy(&_native_handle);
+#endif
+        }
+
+        inline void
+        lock(void) {
+#ifdef _WIN32
+            EnterCriticalSection(&_native_handle);
+#else
+            pthread_mutex_lock(&_native_handle);
+#endif
+        }
+
+        inline void
+        unlock(void) {
+#ifdef _WIN32
+            LeaveCriticalSection(&_native_handle);
+#else
+            pthread_mutex_unlock(&_native_handle);
+#endif
+        }
+
+        native_handle_type & native_handle() {
+            return _native_handle;
+        }
+
+    protected:
+        native_handle_type _native_handle;
+    };
+
+
+    /**
+     * Same interface as std::mutex.
+     */
+    class mutex : public _base_mutex
+    {
+    public:
+        inline
+        mutex(void) {
+#ifdef _WIN32
+            InitializeCriticalSection(&_native_handle);
+#else
+            pthread_mutex_init(&_native_handle, NULL);
+#endif
+        }
+    };
+
+
+    /**
+     * Same interface as std::recursive_mutex.
+     */
+    class recursive_mutex : public _base_mutex
+    {
+    public:
+        inline
+        recursive_mutex(void) {
+#ifdef _WIN32
+            InitializeCriticalSection(&_native_handle);
+#else
+            pthread_mutexattr_t attr;
+            pthread_mutexattr_init(&attr);
+            pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
+            pthread_mutex_init(&_native_handle, &attr);
+            pthread_mutexattr_destroy(&attr);
+#endif
+        }
+    };
+
+
+    /**
+     * Same interface as std::unique_lock;
+     */
+    template< class Mutex >
+    class unique_lock
+    {
+    public:
+        typedef Mutex mutex_type;
+
+        inline explicit
+        unique_lock(mutex_type & mutex) :
+            _mutex(&mutex)
+        {
+            _mutex->lock();
+        }
+
+        inline
+        ~unique_lock() {
+            _mutex->unlock();
+        }
+
+        inline void
+        lock() {
+            _mutex->lock();
+        }
+
+        inline void
+        unlock() {
+            _mutex->unlock();
+        }
+
+        mutex_type *
+        mutex() const {
+            return _mutex;
+        }
+
+    protected:
+        mutex_type *_mutex;
+    };
+
+
+    /**
+     * Same interface as std::condition_variable
+     */
+    class condition_variable
+    {
+    public:
+#ifdef _WIN32
+        /* FIXME */
+#else
+        typedef pthread_cond_t native_handle_type;
+#endif
+
+        condition_variable() {
+#ifdef _WIN32
+            /* FIXME */
+#else
+            pthread_cond_init(&_native_handle, NULL);
+#endif
+        }
+
+        ~condition_variable() {
+#ifdef _WIN32
+            /* FIXME */
+#else
+            pthread_cond_destroy(&_native_handle);
+#endif
+        }
+
+        inline void
+        signal(void) {
+#ifdef _WIN32
+            /* FIXME */
+#else
+            pthread_cond_signal(&_native_handle);
+#endif
+        }
+
+        inline void
+        wait(unique_lock<mutex> & lock) {
+#ifdef _WIN32
+            /* FIXME */
+#else
+            pthread_cond_wait(&_native_handle, &lock.mutex()->native_handle());
+#endif
+        }
+
+    protected:
+        native_handle_type _native_handle;
+    };
+
+
+    /**
+     * Same interface as boost::thread_specific_ptr.
+     */
     template <typename T>
     class thread_specific_ptr
     {
@@ -105,6 +298,7 @@ namespace os {
         }
     };
 
+
 } /* namespace os */
 
 #endif /* _OS_THREAD_HPP_ */