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-rw-r--r--source/OSSupport/Event.cpp118
1 files changed, 118 insertions, 0 deletions
diff --git a/source/OSSupport/Event.cpp b/source/OSSupport/Event.cpp
new file mode 100644
index 000000000..13b5c1d3f
--- /dev/null
+++ b/source/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( 0, FALSE, FALSE, 0 );
+ 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
+}
+
+
+
+