@brief Record a deallocation of sz bytes (real usable size). */

* @brief Insert a memFrame into the tree along the provided call stack. * @param callstack Null-terminated array of function name pointers.

@return Current stack depth. */

@return Elapsed time in milliseconds in discrete ticks. */

@return Synthetic frame id composed from top symbol pointer plus cumulative hash. */

CRC32 implementation

@brief Pop top of stack (must not be empty). */

@brief Push function name onto stack and update frame id hash. */

@return Top function name (undefined if empty). */