Alive thread implemented

shm.cpp

@@ -211,6 +211,11 @@ public:
         return new ShmSem(name, owner);
     }
 
+public:
+    void takeOwnership() {
+        _owner = true;
+    }
+
 public:
     ShmApiBase(const char *name, size_t size, bool owner) {
         char *buf = reinterpret_cast<char *>(malloc(strlen(name) + 50));
@@ -520,11 +525,15 @@ public:
         ReleaseSemaphore(_sem, 1, NULL);
     }
 
-    void wait() {
-        DWORD r = WaitForSingleObject(_sem, INFINITE);
+    bool wait(int ms) {
+        DWORD r = WaitForSingleObject(_sem, ms);
         if (r != WAIT_OBJECT_0) {
-            ERROR1("sem_wait error: %ld\n", r);
+            if (r != WAIT_TIMEOUT) {
+                ERROR1("sem_wait error: %ld\n", r);
+            }
+            return false;
         }
+        return true;
     }
 
     bool trywait() {
@@ -535,6 +544,10 @@ public:
         return r == WAIT_OBJECT_0;
     }
 
+    void takeOwnership() {
+        _owner = true;
+    }
+
 public:
     ShmSemApi(const char *n, bool owner) {
         _name = _strdup(n);
@@ -610,6 +623,11 @@ void *Shm::ref(int place)
     return _shm_api->ref(place);
 }
 
+void Shm::takeOwnership()
+{
+    _shm_api->takeOwnership();
+}
+
 void Shm::info(int &usage, int &free_depth, int &free_size, int &item_depth, int &item_size, double &usage_factor)
 {
     _shm_api->info(usage, free_depth, free_size, item_depth, item_size, usage_factor);
@@ -635,14 +653,19 @@ void ShmSem::post() {
     _api->post();
 }
 
-void ShmSem::wait() {
-    _api->wait();
+bool ShmSem::wait(int ms) {
+    return _api->wait(ms);
 }
 
 bool ShmSem::trywait() {
     return _api->trywait();
 }
 
+void ShmSem::takeOwnership()
+{
+    _api->takeOwnership();
+}
+
 ShmSem::ShmSem(const char *n, bool owner) {
     _api = new ShmSemApi(n, owner);
 }