1 files changed, 33 insertions, 0 deletions
diff --git a/zen/process_status.h b/zen/process_status.h
new file mode 100644
index 00000000..cc5825aa
--- /dev/null
+++ b/zen/process_status.h
@@ -0,0 +1,33 @@
+#ifndef PREVENTSTANDBY_H_INCLUDED
+#define PREVENTSTANDBY_H_INCLUDED
+
+#ifdef FFS_WIN
+#include "win.h" //includes "windows.h"
+#endif
+
+namespace zen
+{
+struct DisableStandby //signal a "busy" state to the operating system
+{
+#ifdef FFS_WIN
+    DisableStandby() { ::SetThreadExecutionState(ES_CONTINUOUS | ES_SYSTEM_REQUIRED /* | ES_AWAYMODE_REQUIRED*/ ); }
+    ~DisableStandby() { ::SetThreadExecutionState(ES_CONTINUOUS); }
+#endif
+};
+
+
+#ifndef PROCESS_MODE_BACKGROUND_BEGIN
+#define PROCESS_MODE_BACKGROUND_BEGIN     0x00100000 // Windows Server 2003 and Windows XP/2000:  This value is not supported!
+#define PROCESS_MODE_BACKGROUND_END       0x00200000 //
+#endif
+
+struct ScheduleForBackgroundProcessing //lower CPU and file I/O priorities
+{
+#ifdef FFS_WIN
+    ScheduleForBackgroundProcessing() { ::SetPriorityClass(::GetCurrentProcess(), PROCESS_MODE_BACKGROUND_BEGIN); }
+    ~ScheduleForBackgroundProcessing() { ::SetPriorityClass(::GetCurrentProcess(), PROCESS_MODE_BACKGROUND_END); }
+#endif
+};
+}
+
+#endif // PREVENTSTANDBY_H_INCLUDED