Package org.lwjgl.system.jemalloc
Interface MallocMessageCallbackI
- All Known Implementing Classes:
MallocMessageCallback
- 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 passed to the
malloc_usable_size
method.
Type
void (*invoke(long, long)
) (
void *cbopaque,
char const *s
)
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Nested Class Summary
Nested classes/interfaces inherited from interface org.lwjgl.system.Pointer
Pointer.Default
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Field Summary
Fields inherited from interface org.lwjgl.system.Pointer
BITS32, BITS64, CLONG_SHIFT, CLONG_SIZE, POINTER_SHIFT, POINTER_SIZE
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Method Summary
Modifier and TypeMethodDescriptiondefault void
callback
(long ret, long args) The Java method that will be called from native code when the native callback function is invoked.default FFICIF
Returns the libffi Call Interface for this callback function.void
invoke
(long cbopaque, long s) Will be called by themalloc_usable_size
method.
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Field Details
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CIF
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Method Details
-
getCallInterface
Description copied from interface:CallbackI
Returns the libffi Call Interface for this callback function. [INTERNAL API]- Specified by:
getCallInterface
in interfaceCallbackI
- Returns:
- the CIF structure for this callback function
-
callback
default void callback(long ret, long args) Description copied from interface:CallbackI
The Java method that will be called from native code when the native callback function is invoked.- Specified by:
callback
in interfaceCallbackI
- Parameters:
ret
- a pointer to the memory used for the function's return value.If the function is declared as returning
void
, then this value is garbage and should not be used.Otherwise, the callback must fill the object to which this points, following the same special promotion behavior as
LibFFI.ffi_call(org.lwjgl.system.libffi.FFICIF, long, java.nio.ByteBuffer, org.lwjgl.PointerBuffer)
. That is, in most cases,ret
points to an object of exactly the size of the type specified whenCIF
was constructed. However, integral types narrower than the system register size are widened. In these cases your program may assume thatret
points to anffi_arg
object.args
- a vector of pointers to memory holding the arguments to the function
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invoke
void invoke(long cbopaque, long s) Will be called by themalloc_usable_size
method.- Parameters:
cbopaque
- the opaque pointer passed tomalloc_usable_size
s
- the message
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