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pvDataApp/misc/event.cpp

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+/* event.cpp */
+/**
+ * Copyright - See the COPYRIGHT that is included with this distribution.
+ * EPICS pvDataCPP is distributed subject to a Software License Agreement found
+ * in file LICENSE that is included with this distribution.
+ */
+#include <cstddef>
+#include <cstdlib>
+#include <cstddef>
+#include <string>
+#include <cstdio>
+#include <stdexcept>
+
+#include <memory>
+#include <vector>
+#include <epicsThread.h>
+#include <epicsMutex.h>
+#include <epicsEvent.h>
+#include "noDefaultMethods.h"
+#include "pvType.h"
+#include "lock.h"
+#include "event.h"
+
+namespace epics { namespace pvData { 
+
+static volatile int64 totalConstruct = 0;
+static volatile int64 totalDestruct = 0;
+static Mutex *globalMutex = 0;
+static String alreadyOn("already on list");
+
+
+static int64 getTotalConstruct()
+{
+    Lock xx(globalMutex);
+    return totalConstruct;
+}
+
+static int64 getTotalDestruct()
+{
+    Lock xx(globalMutex);
+    return totalDestruct;
+}
+
+static ConstructDestructCallback *pConstructDestructCallback;
+
+static void init()
+{
+     static Mutex mutex = Mutex();
+     Lock xx(&mutex);
+     if(globalMutex==0) {
+        globalMutex = new Mutex();
+        pConstructDestructCallback = new ConstructDestructCallback(
+            String("event"),
+            getTotalConstruct,getTotalDestruct,0);
+     }
+}
+
+Event::~Event() {
+    epicsEventDestroy(id);
+    id = 0;
+    Lock xx(globalMutex);
+    totalDestruct++;
+}
+
+
+Event::Event(bool full)
+: id(epicsEventCreate(full?epicsEventFull : epicsEventEmpty))
+{
+    init();
+    Lock xx(globalMutex);
+    totalConstruct++;
+}
+
+ConstructDestructCallback *Event::getConstructDestructCallback()
+{
+    init();
+    return pConstructDestructCallback;
+}
+
+void Event::signal()
+{
+    if(id==0) throw std::logic_error(String("event was deleted"));
+    epicsEventSignal(id);
+}
+
+bool Event::wait ()
+{
+    if(id==0) throw std::logic_error(String("event was deleted"));
+    epicsEventWaitStatus status = epicsEventWait(id);
+    return status==epicsEventWaitOK ? true : false;
+}
+
+bool Event::wait ( double timeOut )
+{
+    if(id==0) throw std::logic_error(String("event was deleted"));
+    epicsEventWaitStatus status = epicsEventWaitWithTimeout(id,timeOut);
+    return status==epicsEventWaitOK ? true : false;
+}
+
+bool Event::tryWait ()
+{
+    if(id==0) throw std::logic_error(String("event was deleted"));
+    epicsEventWaitStatus status = epicsEventTryWait(id);
+    return status==epicsEventWaitOK ? true : false;
+}
+
+}}