headers/private/kernel/low_resource_manager.h

   1 /*
   2  * Copyright 2008, Ingo Weinhold, ingo_weinhold@gmx.de.
   3  * Copyright 2005-2009, Axel Dörfler, axeld@pinc-software.de.
   4  * Distributed under the terms of the MIT License.
   5  */
   6 #ifndef _KERNEL_LOW_RESOURCE_MANAGER_H
   7 #define _KERNEL_LOW_RESOURCE_MANAGER_H
   8
   9
  10 #include <SupportDefs.h>
  11
  12
  13 /* warning levels for low resource handlers */
  14 enum {
  15         B_NO_LOW_RESOURCE = 0,
  16         B_LOW_RESOURCE_NOTE,
  17         B_LOW_RESOURCE_WARNING,
  18         B_LOW_RESOURCE_CRITICAL,
  19 };
  20
  21 enum {
  22         B_KERNEL_RESOURCE_PAGES                 = 0x01, /* physical pages */
  23         B_KERNEL_RESOURCE_MEMORY                = 0x02, /* reservable memory */
  24         B_KERNEL_RESOURCE_SEMAPHORES    = 0x04, /* semaphores */
  25         B_KERNEL_RESOURCE_ADDRESS_SPACE = 0x08, /* address space */
  26
  27         B_ALL_KERNEL_RESOURCES                  = B_KERNEL_RESOURCE_PAGES
  28                                                                                 | B_KERNEL_RESOURCE_MEMORY
  29                                                                                 | B_KERNEL_RESOURCE_SEMAPHORES
  30                                                                                 | B_KERNEL_RESOURCE_ADDRESS_SPACE
  31 };
  32
  33 typedef void (*low_resource_func)(void *data, uint32 resources, int32 level);
  34
  35 #ifdef __cplusplus
  36 extern "C" {
  37 #endif
  38
  39 status_t low_resource_manager_init(void);
  40 status_t low_resource_manager_init_post_thread(void);
  41 int32 low_resource_state(uint32 resources);
  42 void low_resource(uint32 resource, uint64 requirements, uint32 flags,
  43         uint32 timeout);
  44
  45 // these calls might get public some day
  46 status_t register_low_resource_handler(low_resource_func function, void *data,
  47                         uint32 resources, int32 priority);
  48 status_t unregister_low_resource_handler(low_resource_func function,
  49                         void *data);
  50
  51 #ifdef __cplusplus
  52 }
  53 #endif
  54
  55 #endif  /* _KERNEL_LOW_RESOURCE_MANAGER_H */