(This is the documentation for SDL3, which is the current stable version. SDL2 was the previous version!)

SDL_ALLOC_SIZE

A macro to tag a function as returning a certain allocation.

Header File

Defined in <SDL3/SDL_begin_code.h>

Syntax

#define SDL_ALLOC_SIZE(p) __attribute__((alloc_size(p)))

Remarks

This is a hint to the compiler that a function allocates and returns a specific amount of memory based on one of its arguments. For example, the C runtime's malloc() function could use this macro with an argument of 1 (first argument to malloc is the size of the allocation).

On compilers without alloc_size support, this is defined to nothing.

Most apps don't need to, and should not, use this directly.

Version

This macro is available since SDL 3.1.3.

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CategoryAPI, CategoryAPIMacro, CategoryBeginCode

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