1 files changed, 118 insertions, 0 deletions

diff --git a/src/OSSupport/Event.cpp b/src/OSSupport/Event.cpp
new file mode 100644
index 000000000..cbacbba17
--- /dev/null
+++ b/src/OSSupport/Event.cpp
@@ -0,0 +1,118 @@
+
+// Event.cpp
+
+// Implements the cEvent object representing an OS-specific synchronization primitive that can be waited-for
+// Implemented as an Event on Win and as a 1-semaphore on *nix
+
+#include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules
+
+#include "Event.h"
+
+
+
+
+
+cEvent::cEvent(void)
+{
+#ifdef _WIN32
+	m_Event = CreateEvent(NULL, FALSE, FALSE, NULL);
+	if (m_Event == NULL)
+	{
+		LOGERROR("cEvent: cannot create event, GLE = %d. Aborting server.", GetLastError());
+		abort();
+	}
+#else  // *nix
+	m_bIsNamed = false;
+	m_Event = new sem_t;
+	if (sem_init(m_Event, 0, 0))
+	{
+		// This path is used by MacOS, because it doesn't support unnamed semaphores.
+		delete m_Event;
+		m_bIsNamed = true;
+
+		AString EventName;
+		Printf(EventName, "cEvent%p", this);
+		m_Event = sem_open(EventName.c_str(), O_CREAT, 777, 0 );
+		if (m_Event == SEM_FAILED)
+		{
+			LOGERROR("cEvent: Cannot create event, errno = %i. Aborting server.", errno);
+			abort();
+		}
+		// Unlink the semaphore immediately - it will continue to function but will not pollute the namespace
+		// We don't store the name, so can't call this in the destructor
+		if (sem_unlink(EventName.c_str()) != 0)
+		{
+			LOGWARN("ERROR: Could not unlink cEvent. (%i)", errno);
+		}
+	}
+#endif  // *nix
+}
+
+
+
+
+
+cEvent::~cEvent()
+{
+#ifdef _WIN32
+	CloseHandle(m_Event);
+#else
+	if (m_bIsNamed)
+	{
+		if (sem_close(m_Event) != 0)
+		{
+			LOGERROR("ERROR: Could not close cEvent. (%i)", errno);
+		}
+	}
+	else
+	{
+		sem_destroy(m_Event);
+		delete m_Event;
+	}
+#endif
+}
+
+
+
+
+
+void cEvent::Wait(void)
+{
+	#ifdef _WIN32
+		DWORD res = WaitForSingleObject(m_Event, INFINITE);
+		if (res != WAIT_OBJECT_0)
+		{
+			LOGWARN("cEvent: waiting for the event failed: %d, GLE = %d. Continuing, but server may be unstable.", res, GetLastError());
+		}
+	#else
+		int res = sem_wait(m_Event);
+		if (res != 0 )
+		{
+			LOGWARN("cEvent: waiting for the event failed: %i, errno = %i. Continuing, but server may be unstable.", res, errno);
+		}
+	#endif
+}
+
+
+
+
+
+void cEvent::Set(void)
+{
+	#ifdef _WIN32
+		if (!SetEvent(m_Event))
+		{
+			LOGWARN("cEvent: Could not set cEvent: GLE = %d", GetLastError());
+		}
+	#else
+		int res = sem_post(m_Event);
+		if (res != 0)
+		{
+			LOGWARN("cEvent: Could not set cEvent: %i, errno = %d", res, errno);
+		}
+	#endif
+}
+
+
+
+