Delegate GLFWallocatefun

The function pointer type for memory allocation callbacks.

This is the function pointer type for memory allocation callbacks. A memory allocation callback function has the following signature:

void* function_name(size_t size, void* user)

This function must return either a memory block at least size bytes long, or NULL if allocation failed.Note that not all parts of GLFW handle allocation failures gracefully yet.

This function must support being called during @ref glfwInit but before the library is flagged as initialized, as well as during @ref glfwTerminate after the library is no longer flagged as initialized.

Any memory allocated via this function will be deallocated via the same allocator during library termination or earlier.

Any memory allocated via this function must be suitably aligned for any object type. If you are using C99 or earlier, this alignment is platform-dependent but will be the same as what malloc provides.If you are using C11 or later, this is the value of alignof(max_align_t).

The size will always be greater than zero. Allocations of size zero are filtered out before reaching the custom allocator.

If this function returns NULL, GLFW will emit OutOfMemory.

This function must not call any GLFW function.

Added in version 3.4.

Namespace: OpenTK.Windowing.GraphicsLibraryFramework

Assembly: OpenTK.Windowing.GraphicsLibraryFramework.dll

Syntax

public delegate void* GLFWallocatefun(UIntPtr size, void* user)

Parameters

Type	Name	Description
UIntPtr	size	The minimum size, in bytes, of the memory block.
void*	user	The user-defined pointer from the allocator.

Returns

Type	Description
void*	The address of the newly allocated memory block, or NULL if an error occurred.

Remarks

The returned memory block must be valid at least until it is deallocated.

This function should not call any GLFW function.

This function must support being called from any thread that calls GLFW functions.