mirror of
https://github.com/krgamestudios/Toy.git
synced 2026-04-15 23:04:08 +10:00
71 lines
3.4 KiB
Markdown
71 lines
3.4 KiB
Markdown
# toy_memory.h
|
|
|
|
This header defines all of the memory management utilities. Any and all heap-based memory management goes through these utilities.
|
|
|
|
A default memory allocator function is used internally, but it can be overwritten for diagnostic and platform related purposes.
|
|
|
|
## Defined Macros
|
|
|
|
### TOY_GROW_CAPACITY(capacity)
|
|
|
|
This macro calculates, in place, what size of memory should be allocated based on the previous size.
|
|
|
|
### TOY_GROW_CAPACITY_FAST(capacity)
|
|
|
|
This macro calculates, in place, what size of memory should be allocated based on the previous size. It grows faster than `TOY_GROW_CAPACITY`.
|
|
|
|
### TOY_ALLOCATE(type, count)
|
|
|
|
This macro wraps `Toy_reallocate`, which itself calls the allocator function. `type` is the type that will be allocated, and `count` is the number which will be needed (usually calculated with `TOY_GROW_CAPACITY`).
|
|
|
|
This returns a pointer of `type`.
|
|
|
|
### TOY_FREE(type, pointer)
|
|
|
|
This macro wraps `Toy_reallocate`, which itself calls the allocator function. `type` is the type that will be freed, and `pointer` is to what is being freed. This should only be used when a single element has been allocated, as opposed to an array.
|
|
|
|
### TOY_FREE_ARRAY(type, pointer, oldCount)
|
|
|
|
This macro wraps `Toy_reallocate`, which itself calls the allocator function. `type` is the type that will be freed, `pointer` is a reference to what is being freed, and `oldCount` is the size of the array being freed. This should only be used when an array has been allocated, as opposed to a single element.
|
|
|
|
### TOY_GROW_ARRAY(type, pointer, oldCount, count)
|
|
|
|
This macro wraps `Toy_reallocate`, which itself calls the allocator function. `type` is the type that is being operated on, `pointer` is what is being resized, `oldCount` is the previous size of the array and `count` is the new size of the array (usually calculated with `TOY_GROW_CAPACITY`).
|
|
|
|
This returns a pointer of `type`.
|
|
|
|
### TOY_SHRINK_ARRAY(type, pointer, oldCount, count)
|
|
|
|
This macro wraps `Toy_reallocate`, which itself calls the allocator function. `type` is the type that is being operated on, `pointer` is what is being resized, `oldCount` is the previous size of the array and `count` is the new size of the array.
|
|
|
|
This returns a pointer of `type`.
|
|
|
|
## Defined Interfaces
|
|
|
|
### typedef void* (*Toy_MemoryAllocatorFn)(void* pointer, size_t oldSize, size_t newSize)
|
|
|
|
This function interface is used for defining any memory allocator functions.
|
|
|
|
Any and all memory allocator functions should:
|
|
|
|
* Take a `pointer` to a previously allocated block of memory, or `NULL`
|
|
* Take the `oldSize`, which is the previous size of the `pointer` allocated, in bytes (`oldSize` can be 0)
|
|
* Take the `newSize`, which is the new size of the buffer to be allocaated, in bytes (`newSize` can be 0)
|
|
* Return the newly allocated buffer, or `NULL` if `newSize` is zero
|
|
* Return `NULL` on error
|
|
|
|
## Defined Functions
|
|
|
|
### TOY_API void* Toy_reallocate(void* pointer, size_t oldSize, size_t newSize)
|
|
|
|
This function shouldn't be called directly. Instead, use one of the given macros.
|
|
|
|
This function wraps a call to the internal assigned memory allocator.
|
|
|
|
### void Toy_setMemoryAllocator(Toy_MemoryAllocatorFn)
|
|
|
|
This function sets the memory allocator, replacing the default memory allocator.
|
|
|
|
This function also overwrites any given refstring memory allocator, see [toy_refstring.h](toy_refstring_h.md).
|
|
|