piWithInterrupts.cpp File Reference

#include <Rcpp.h>
#include <R_ext/Utils.h>

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Classes
class	interrupt_exception

Functions
static void	check_interrupt_impl (void *)
bool	check_interrupt ()
RcppExport SEXP	PiLeibniz (SEXP n, SEXP frequency)

Function Documentation

check_interrupt()

bool check_interrupt ( )

inline

Call this method to check for user interrupts. This is based on the results of a discussion on the R-devel mailing list, suggested by Simon Urbanek.

Attention

This method must not be called by any other thread than the master thread. If called from within an OpenMP parallel for loop, make sure to check for omp_get_thread_num()==0 before calling this method!

Returns

True, if a user interrupt has been detected.

Definition at line 64 of file piWithInterrupts.cpp.

References check_interrupt_impl().

Referenced by PiLeibniz().

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check_interrupt_impl()

static void check_interrupt_impl ( void *  )

inlinestatic

Do the actual check for an interrupt.

Attention

This method should never be called directly.

Parameters

[in]

dummy

Dummy argument.

Definition at line 50 of file piWithInterrupts.cpp.

Referenced by check_interrupt().

PiLeibniz()

RcppExport SEXP PiLeibniz	(	SEXP	n,
		SEXP	frequency
	)

Compute pi using the Leibniz formula (a very inefficient approach).

Parameters

[in]	n	Number of summands
[in]	frequency	Check for interrupts after every frequency loop cycles.

Definition at line 75 of file piWithInterrupts.cpp.

References BEGIN_RCPP, check_interrupt(), END_RCPP, Rcpp::algorithm::min(), and Rcpp::wrap().

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