Get data pointer from R vector with GC protection

Returns an external pointer to the underlying data (INTEGER, REAL, etc.) while ensuring the object won't be garbage collected.

Usage

data_ptr(x)

Arguments

x

An R vector (integer, double, complex, character, raw, or list)

Value

External pointer to the data, with finalizer to release protection

Details

Note: For ALTREP objects (like 1:10), use data_ptr_ro() instead, which properly handles deferred materialization.

Examples

if (FALSE) { # \dontrun{
x <- c(1.0, 2.0, 3.0) # Regular vector, not ALTREP
ptr <- data_ptr(x)
# ptr points to the double* array
# Safe to pass to C functions expecting double*
} # }