Interface ExtentPurgeI

All Superinterfaces:
org.lwjgl.system.CallbackI, org.lwjgl.system.Pointer
All Known Implementing Classes:
ExtentPurge
Functional Interface:
This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface public interface ExtentPurgeI extends org.lwjgl.system.CallbackI
Instances of this interface may be set to the ExtentHooks struct.

Type


 bool (*invoke(long, long, long, long, long, int)) (
     extent_hooks_t *extent_hooks,
     void *addr,
     size_t size,
     size_t offset,
     size_t length,
     unsigned int arena_ind
 )
  • Nested Class Summary

    Nested classes/interfaces inherited from interface org.lwjgl.system.Pointer

    org.lwjgl.system.Pointer.Default
  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final org.lwjgl.system.libffi.FFICIF
     

    Fields inherited from interface org.lwjgl.system.Pointer

    BITS32, BITS64, CLONG_SHIFT, CLONG_SIZE, POINTER_SHIFT, POINTER_SIZE
  • Method Summary

    Modifier and Type
    Method
    Description
    default void
    callback(long ret, long args)
     
    default org.lwjgl.system.libffi.FFICIF
     
    boolean
    invoke(long extent_hooks, long addr, long size, long offset, long length, int arena_ind)
    Extent purge hook.

    Methods inherited from interface org.lwjgl.system.CallbackI

    address
  • Field Details

    • CIF

      static final org.lwjgl.system.libffi.FFICIF CIF
  • Method Details

    • getCallInterface

      default org.lwjgl.system.libffi.FFICIF getCallInterface()
      Specified by:
      getCallInterface in interface org.lwjgl.system.CallbackI
    • callback

      default void callback(long ret, long args)
      Specified by:
      callback in interface org.lwjgl.system.CallbackI
    • invoke

      boolean invoke(long extent_hooks, long addr, long size, long offset, long length, int arena_ind)
      Extent purge hook.

      An extent purge function conforms to the extent_purge_t type and discards physical pages within the virtual memory mapping associated with an extent at given addr and size at offset bytes, extending for length on behalf of arena arena_ind. A lazy extent purge function (e.g. implemented via madvise(..., MADV_FREE)) can delay purging indefinitely and leave the pages within the purged virtual memory range in an indeterminite state, whereas a forced extent purge function immediately purges, and the pages within the virtual memory range will be zero-filled the next time they are accessed. If the function returns true, this indicates failure to purge.