Added a basic low memory handler service.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@13090 a95241bf-73f2-0310-859d-f6bbb57e9c96
2005-06-13 13:03:54 +00:00
parent b1a248305b
commit b84688be5f
4 changed files with 185 additions and 2 deletions
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2005, Axel Dörfler, [email protected]. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef _KERNEL_VM_LOW_MEMORY_H
+#define _KERNEL_VM_LOW_MEMORY_H
+
+
+#include <SupportDefs.h>
+
+
+/* warning levels for low memory handlers */
+enum {
+	B_LOW_MEMORY_NOTE,
+	B_LOW_MEMORY_WARNING,
+	B_LOW_MEMORY_CRITICAL,
+};
+
+typedef void (*low_memory_func)(void *data, int32 level);
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+status_t vm_low_memory_init(void);
+void vm_low_memory(size_t requirements);
+
+// these calls might get public some day
+status_t register_low_memory_handler(low_memory_func function, void *data,
+			int32 priority);
+status_t unregister_low_memory_handler(low_memory_func function, void *data);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif	/* _KERNEL_VM_LOW_MEMORY_H */