Package org.lwjgl.system.jemalloc
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.
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
)
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Nested Class Summary
Nested classes/interfaces inherited from interface org.lwjgl.system.Pointer
org.lwjgl.system.Pointer.Default
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Field Summary
FieldsFields inherited from interface org.lwjgl.system.Pointer
BITS32, BITS64, CLONG_SHIFT, CLONG_SIZE, POINTER_SHIFT, POINTER_SIZE
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Method Summary
Methods inherited from interface org.lwjgl.system.CallbackI
address
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Field Details
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CIF
static final org.lwjgl.system.libffi.FFICIF CIF
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Method Details
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getCallInterface
default org.lwjgl.system.libffi.FFICIF getCallInterface()- Specified by:
getCallInterface
in interfaceorg.lwjgl.system.CallbackI
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callback
default void callback(long ret, long args) - Specified by:
callback
in interfaceorg.lwjgl.system.CallbackI
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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 givenaddr
andsize
atoffset
bytes, extending forlength
on behalf of arenaarena_ind
. A lazy extent purge function (e.g. implemented viamadvise(..., 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.
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