Re: lib/37943: posix_memalign doesn't work

[Magnus Henoch <mange%freemail.hu@localhost>]

The following reply was made to PR lib/37943; it has been noted by GNATS.

From: Magnus Henoch <mange%freemail.hu@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: lib/37943: posix_memalign doesn't work
Date: Sun, 03 Feb 2008 16:22:15 +0100

 It seems the alignment is still incorrect, though.  Using the extended
 test program below, I get:
 
 % ./posix_memalign_test 4096 8192 8184
 posix_memalign(&a, 8192, 8184): 0x1813000
 0x1813000 % 8192 = 4096
 
 
 #include <stdio.h>
 #include <stdlib.h>
 
 int main(int argc, char *argv[])
 {
   char *a;
   int n;
   size_t size, alignment, prealloc;
 
   if (argc != 4) {
     printf("Usage: %s PREALLOC ALIGNMENT SIZE\n", argv[0]);
     return 1;
   }
 
   sscanf(argv[1], "%d", &prealloc);
   sscanf(argv[2], "%d", &alignment);
   sscanf(argv[3], "%d", &size);
 
   malloc(prealloc);
 
   n = posix_memalign(&a, alignment, size);
   if (n)
     perror("posix_memalign");
   else
     printf("posix_memalign(&a, %d, %d): %p\n", alignment, size, a);
   *a = 'a';
 
   printf("%p %% %d = %d\n", a, alignment, (int)a % alignment);  
 
   return 0;
 }