[−][src]Trait gdnative_core::nativescript::user_data::UserData
Trait for customizable user-data wrappers.
See module-level documentation for detailed explanation on user-data.
Associated Types
type Target: NativeClass
Required methods
fn new(val: Self::Target) -> Self
Creates a new owned wrapper from a NativeClass
instance.
This operation must never fail.
fn into_user_data(self) -> *const c_void
Takes a native instance and returns an opaque pointer that can be used to recover it.
This gives "ownership" to the engine.
This operation must never fail.
unsafe fn consume_user_data_unchecked(ptr: *const c_void) -> Self
Takes an opaque pointer produced by into_user_data
and "consumes" it to produce the
original instance, keeping the reference count.
This should be used when "ownership" is taken from the engine, i.e. destructors. Use elsewhere can lead to premature drops of the instance contained inside.
ptr
is guaranteed to be non-null.
This operation must never fail.
Safety
ptr
must be pointing to valid data of the correct type.
unsafe fn clone_from_user_data_unchecked(ptr: *const c_void) -> Self
Takes an opaque pointer produced by into_user_data
and "clones" it to produce the
original instance, increasing the reference count.
This should be used when user data is "borrowed" from the engine.
ptr
is guaranteed to be non-null.
This operation must never fail.
Safety
ptr
must be pointing to valid data of the correct type.
Implementors
impl<T> UserData for Aether<T> where
T: NativeClass + Copy + Default,
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T: NativeClass + Copy + Default,
type Target = T
fn new(_val: Self::Target) -> Self
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fn into_user_data(self) -> *const c_void
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unsafe fn consume_user_data_unchecked(_ptr: *const c_void) -> Self
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unsafe fn clone_from_user_data_unchecked(_ptr: *const c_void) -> Self
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impl<T> UserData for ArcData<T> where
T: NativeClass + Send + Sync,
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T: NativeClass + Send + Sync,
type Target = T
fn new(val: Self::Target) -> Self
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fn into_user_data(self) -> *const c_void
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unsafe fn consume_user_data_unchecked(ptr: *const c_void) -> Self
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unsafe fn clone_from_user_data_unchecked(ptr: *const c_void) -> Self
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impl<T> UserData for LocalCellData<T> where
T: NativeClass,
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T: NativeClass,
type Target = T
fn new(val: Self::Target) -> Self
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fn into_user_data(self) -> *const c_void
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unsafe fn consume_user_data_unchecked(ptr: *const c_void) -> Self
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unsafe fn clone_from_user_data_unchecked(ptr: *const c_void) -> Self
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impl<T, OPT> UserData for MutexData<T, OPT> where
T: NativeClass + Send,
OPT: LockOptions,
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T: NativeClass + Send,
OPT: LockOptions,
type Target = T
fn new(val: Self::Target) -> Self
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fn into_user_data(self) -> *const c_void
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unsafe fn consume_user_data_unchecked(ptr: *const c_void) -> Self
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unsafe fn clone_from_user_data_unchecked(ptr: *const c_void) -> Self
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impl<T, OPT> UserData for RwLockData<T, OPT> where
T: NativeClass + Send + Sync,
OPT: LockOptions,
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T: NativeClass + Send + Sync,
OPT: LockOptions,