Initial commit: video player - viper

Change-Id: Id5aa33598ce34659bad4a7a9ae5006bfb84f9bd1
Signed-off-by: Luca Muscariello <lumuscar+fdio@cisco.com>

1 files changed, 112 insertions, 0 deletions

diff --git a/libdash/source/portable/MultiThreading.cpp b/libdash/source/portable/MultiThreading.cpp
new file mode 100644
index 00000000..5d1fe9c0
--- /dev/null
+++ b/libdash/source/portable/MultiThreading.cpp
@@ -0,0 +1,112 @@
+#include "MultiThreading.h"
+
+THREAD_HANDLE   CreateThreadPortable    (void *(*start_routine) (void *), void *arg)
+{
+    #if defined _WIN32 || defined _WIN64
+        return CreateThread (0, 0, (LPTHREAD_START_ROUTINE)start_routine, (LPVOID)arg, 0, 0);
+    #else
+        THREAD_HANDLE th = (THREAD_HANDLE)malloc(sizeof(pthread_t));
+
+        if (!th)
+        {
+            std::cerr << "Error allocating thread." << std::endl;
+            return NULL;
+        }
+
+        pthread_attr_t attr;
+        pthread_attr_init(&attr);
+        pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+
+        if(int err = pthread_create(th, &attr, start_routine, arg))
+        {
+            std::cerr << strerror(err) << std::endl;
+            return NULL;
+        }
+        return th;
+    #endif
+}
+void            DestroyThreadPortable   (THREAD_HANDLE th)
+{
+    #if !defined _WIN32 && !defined _WIN64
+        if(th)
+            free(th);
+    #endif
+}
+
+/****************************************************************************
+* Condition variables for Windows XP and older windows sytems
+*****************************************************************************/
+#if defined WINXPOROLDER
+    void InitCondition       (condition_variable_t *cv)
+    {
+        InitializeCriticalSection(&cv->waitersCountLock);
+
+        cv->waitersCount        = 0;
+        cv->waitGenerationCount = 0;
+        cv->releaseCount        = 0;
+
+        cv->waitingEvent = CreateEvent (NULL,  // no security
+                                        TRUE,  // manual-reset
+                                        FALSE, // non-signaled initially
+                                        NULL); // unnamed
+    }
+    void WaitCondition       (condition_variable_t *cv, CRITICAL_SECTION *externalMutex)
+    {
+        EnterCriticalSection(&cv->waitersCountLock);
+
+        cv->waitersCount++;
+
+        int currentGenerationCount = cv->waitGenerationCount;
+
+        LeaveCriticalSection(&cv->waitersCountLock);
+        LeaveCriticalSection(externalMutex);
+
+        bool isWaitDone = false;
+        while(!isWaitDone)
+        {
+            WaitForSingleObject (cv->waitingEvent, INFINITE);
+            EnterCriticalSection (&cv->waitersCountLock);
+
+            isWaitDone = (cv->releaseCount > 0 && cv->waitGenerationCount != currentGenerationCount);
+            LeaveCriticalSection (&cv->waitersCountLock);
+        }
+
+        EnterCriticalSection(externalMutex);
+        EnterCriticalSection(&cv->waitersCountLock);
+
+        cv->waitersCount--;
+        cv->releaseCount--;
+        bool isLastWaiter = (cv->releaseCount == 0);
+
+        LeaveCriticalSection(&cv->waitersCountLock);
+
+        if(isLastWaiter)
+            ResetEvent(cv->waitingEvent);
+    }
+    void SignalCondition     (condition_variable_t *cv)
+    {
+        EnterCriticalSection(&cv->waitersCountLock);
+
+        if(cv->waitersCount > cv->releaseCount) 
+        {
+            SetEvent(cv->waitingEvent);
+            cv->releaseCount++;
+            cv->waitGenerationCount++;
+        }
+
+        LeaveCriticalSection(&cv->waitersCountLock);
+    }
+    void BroadcastCondition  (condition_variable_t *cv)
+    {
+        EnterCriticalSection(&cv->waitersCountLock);
+
+        if(cv->waitersCount > 0) 
+        {
+            SetEvent(cv->waitingEvent);
+            cv->releaseCount = cv->waitersCount;
+            cv->waitGenerationCount++;
+        }
+
+        LeaveCriticalSection(&cv->waitersCountLock);
+}
+#endif