[R] aligned memory allocation in C

[Christophe Dutang1]

Hi,

I'm currently R porting SF Mersenne Twister algorithm of Matsumoto and  
Saito. To get the full power of their code, I want to use their  
fonction fill_array32 which need aligned memory. That is to say I need  
to use the C function memalign on windows, posix_memalign on linux and  
classic malloc on Mac OS. In 'writing R extenstion', they recommand to  
use R_alloc function to allocate memory in C.

Does R_alloc return a pointer to aligned memory?
if not how can I do this?
probably no, because R crashes when I succesively R_alloc and  
fill_array32 (cf below) on my macbook with R 2.7.1.


Thanks in advance

Kind regards

Christophe


PS : http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/SFMT/howto-compile.html 
  provides an example of memalign.

PPS : mac os report

Thread 0 Crashed:
0   libSystem.B.dylib             	0x9341bb9e __kill + 10
1   libSystem.B.dylib             	0x93492ec2 raise + 26
2   libSystem.B.dylib             	0x934a247f abort + 73
3   randtoolbox.so                	0x15e65f1d 0x15e5d000 + 36637
4   randtoolbox.so                	0x15e614ef fill_array32 + 4038
5   randtoolbox.so                	0x15e6513d SFmersennetwister + 335
6   randtoolbox.so                	0x15e652c6 doSFMersenneTwister + 255
7   libR.dylib                    	0x00367a52 do_dotcall + 1394
8   libR.dylib                    	0x0038b5a2 Rf_eval + 1754
9   libR.dylib                    	0x0038f9a2 do_set + 592
10  libR.dylib                    	0x0038b366 Rf_eval + 1182
11  libR.dylib                    	0x0038b366 Rf_eval + 1182
12  libR.dylib                    	0x0038c140 do_begin + 58
13  libR.dylib                    	0x0038b366 Rf_eval + 1182
14  libR.dylib                    	0x0038b366 Rf_eval + 1182
15  libR.dylib                    	0x0038c140 do_begin + 58
16  libR.dylib                    	0x0038b366 Rf_eval + 1182
17  libR.dylib                    	0x0038d9a6 Rf_applyClosure + 663
18  libR.dylib                    	0x0038b25d Rf_eval + 917
19  org.R-project.R               	0x000189c3 run_REngineRmainloop +  
569 (Rinit.m:442)
20  org.R-project.R               	0x0001142a -[REngine runREPL] + 260  
(REngine.m:181)
21  org.R-project.R               	0x00002e91 main + 795 (main.m:126)
22  org.R-project.R               	0x00002b5a _start + 216
23  org.R-project.R               	0x00002a81 start + 41