1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; indent-tabs-mode: nil; -*-
//
// Interrupt.h: Rcpp R/C++ interface class library -- check for interrupts
//
// Copyright (C) 2009 - 2013 Dirk Eddelbuettel and Romain Francois
//
// This file is part of Rcpp.
//
// Rcpp is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 2 of the License, or
// (at your option) any later version.
//
// Rcpp is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Rcpp. If not, see <http://www.gnu.org/licenses/>.
#ifndef Rcpp_Interrupt_h
#define Rcpp_Interrupt_h
#include <R_ext/GraphicsEngine.h>
namespace Rcpp {
// Internal functions used in the implementation of checkUserInterrupt
namespace internal {
// Sentinel class for communicating interrupts to the top-level END_RCPP macro
class InterruptedException {};
// Sentinel object of class "interrupted-error" which is used for
// communicating interrupts accross module boundaries without an
// exception (which would crash on windows). This is identical to
// the existing "try-error" sentinel object used for communicating
// errors accross module boundaries.
inline SEXP interruptedError() {
Rcpp::Shield<SEXP> interruptedError( Rf_mkString("") );
Rf_setAttrib( interruptedError, R_ClassSymbol, Rf_mkString("interrupted-error") ) ;
return interruptedError;
}
} // namespace internal
// Helper function to check for interrupts. This is invoked within
// R_ToplevelExec so it doesn't longjmp
namespace {
inline void checkInterruptFn(void* /*dummy*/) {
R_CheckUserInterrupt();
}
} // anonymous namespace
// Check for interrupts and throw the sentinel exception if one is pending
inline void checkUserInterrupt() {
if (R_ToplevelExec(checkInterruptFn, NULL) == FALSE)
throw internal::InterruptedException();
}
} // namespace Rcpp
#endif
|
