Home | History | Annotate | Download | only in ext2fs 
      1 /*
      2  * inline.c --- Includes the inlined functions defined in the header
      3  * 	files as standalone functions, in case the application program
      4  * 	is compiled with inlining turned off.
      5  *
      6  * Copyright (C) 1993, 1994 Theodore Ts'o.
      7  *
      8  * %Begin-Header%
      9  * This file may be redistributed under the terms of the GNU Library
     10  * General Public License, version 2.
     11  * %End-Header%
     12  */
     13 
     14 #ifndef _XOPEN_SOURCE
     15 #define _XOPEN_SOURCE 600	/* for posix_memalign() */
     16 #endif
     17 
     18 #include "config.h"
     19 #include <stdio.h>
     20 #include <string.h>
     21 #if HAVE_UNISTD_H
     22 #include <unistd.h>
     23 #endif
     24 #include <fcntl.h>
     25 #include <time.h>
     26 #if HAVE_SYS_STAT_H
     27 #include <sys/stat.h>
     28 #endif
     29 #if HAVE_SYS_TYPES_H
     30 #include <sys/types.h>
     31 #endif
     32 #if HAVE_MALLOC_H
     33 #include <malloc.h>
     34 #endif
     35 
     36 #include "ext2_fs.h"
     37 #define INCLUDE_INLINE_FUNCS
     38 #include "ext2fs.h"
     39 
     40 /*
     41  * We used to define this as an inline, but since we are now using
     42  * autoconf-defined #ifdef's, we need to export this as a
     43  * library-provided function exclusively.
     44  */
     45 errcode_t ext2fs_get_memalign(unsigned long size,
     46 			      unsigned long align, void *ptr)
     47 {
     48 	errcode_t retval = 0;
     49 	void **p = ptr;
     50 
     51 	if (align < 8)
     52 		align = 8;
     53 #ifdef HAVE_POSIX_MEMALIGN
     54 	retval = posix_memalign(p, align, size);
     55 	if (retval == ENOMEM)
     56 		return EXT2_ET_NO_MEMORY;
     57 #else  /* !HAVE_POSIX_MEMALIGN */
     58 #ifdef HAVE_MEMALIGN
     59 	*p = memalign(align, size);
     60 	if (*p == NULL) {
     61 		if (errno)
     62 			return errno;
     63 		else
     64 			return EXT2_ET_NO_MEMORY;
     65 	}
     66 #else  /* !HAVE_MEMALIGN */
     67 #ifdef HAVE_VALLOC
     68 	if (align > sizeof(long long))
     69 		*p = valloc(size);
     70 	else
     71 #endif
     72 		*p = malloc(size);
     73 	if ((uintptr_t) *p & (align - 1)) {
     74 		free(*p);
     75 		*p = 0;
     76 	}
     77 	if (*p == 0)
     78 		return EXT2_ET_NO_MEMORY;
     79 #endif	/* HAVE_MEMALIGN */
     80 #endif	/* HAVE_POSIX_MEMALIGN */
     81 	return retval;
     82 }
     83 
     84 #ifdef DEBUG
     85 static int isaligned(void *ptr, unsigned long align)
     86 {
     87 	return (((unsigned long) ptr & (align - 1)) == 0);
     88 }
     89 
     90 static errcode_t test_memalign(unsigned long align)
     91 {
     92 	void *ptr = 0;
     93 	errcode_t retval;
     94 
     95 	retval = ext2fs_get_memalign(32, align, &ptr);
     96 	if (!retval && !isaligned(ptr, align))
     97 		retval = EINVAL;
     98 	free(ptr);
     99 	printf("tst_memalign(%lu) is %s\n", align,
    100 	       retval ? error_message(retval) : "OK");
    101 	return retval;
    102 }
    103 
    104 int main(int argc, char **argv)
    105 {
    106 	int err = 0;
    107 
    108 	if (test_memalign(4))
    109 		err++;
    110 	if (test_memalign(32))
    111 		err++;
    112 	if (test_memalign(1024))
    113 		err++;
    114 	if (test_memalign(4096))
    115 		err++;
    116 	return err;
    117 }
    118 #endif
    119