Cstack_info: Report Information on C Stack Size and Usage
In robertzk/monadicbase: The R Base Package

Description Usage Details Value Examples

Report information on the C stack size and usage (if available).

1	Cstack_info()

On most platforms, C stack information is recorded when R is initialized and used for stack-checking. If this information is unavailable, the size will be returned as NA, and stack-checking is not performed.

The information on the stack base address is thought to be accurate on Windows, Linux, OS X and FreeBSD but a heuristic is used on other platforms. Because this might be slightly inaccurate, the current usage could be estimated as negative. (The heuristic is not used on embedded uses of R on platforms where the stack base is not thought to be accurate.)

The ‘evaluation depth’ is the number of nested R expressions currently under evaluation: this has a limit controlled by options("expressions").

An integer vector. This has named elements

`size`	The size of the stack (in bytes), or `NA` if unknown.
`current`	The estimated current usage (in bytes), possibly `NA`.
`direction`	`1` (stack grows down, the usual case) or `-1` (stack grows up).
`eval_depth`	The current evaluation depth (including two calls for the call to `Cstack_info`).