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 org.lwjgl.system.libffi.FFICIF CIF  
      • Fields inherited from interface org.lwjgl.system.Pointer

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

      All Methods Instance Methods Abstract Methods Default Methods 
      Modifier and Type Method Description
      default void callback​(long ret, long args)  
      default org.lwjgl.system.libffi.FFICIF getCallInterface()  
      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 Detail

      • CIF

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

      • 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.