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__weak_alias() doesn't exist on FreeBSD. Use __weak_reference();

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Expose iconv functions as weak symbols as well as their internal
remapped #define names.  This is necessary for autoconf compatability -
on Linux it appears that #include <iconv.h> isn't a link time
prerequisite for their version that's built into glibc.

Initialize the pthread rwlock.  Note that upstream has three
separate locks.  The file-local static lock appears intentional.

I'm using this as a ports-compatible compile-time substitute for
converters/libiconv on one of my personal machines.
This commit is contained in:
Peter Wemm 2013-07-01 08:06:26 +00:00
parent 0d5daade6d
commit 3d4b80da4e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=252458
3 changed files with 19 additions and 11 deletions
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10
lib/libc/iconv/Symbol.map
View File

@ -17,6 +17,16 @@ FBSD_1.2 {
libiconvlist;
};
FBSD_1.3 {
iconv;
iconv_open;
iconv_close;
iconv_open_into;
iconv_set_relocation_prefix;
iconvctl;
iconvlist;
};
FBSDprivate_1.0 {
_citrus_bcs_convert_to_lower;
_citrus_bcs_convert_to_upper;

3
lib/libc/iconv/citrus_lock.h
View File

@ -27,7 +27,8 @@
#include <pthread.h>
static pthread_rwlock_t lock;
/* XXX Yes, the original code has three separate file-local lock instances */
static pthread_rwlock_t lock = PTHREAD_RWLOCK_INITIALIZER;
#define WLOCK if (__isthreaded) \
pthread_rwlock_wrlock(&lock);

17
lib/libc/iconv/iconv.c
View File

@ -47,16 +47,13 @@
#include "citrus_hash.h"
#include "citrus_iconv.h"
#ifdef __weak_alias
__weak_alias(libiconv, _iconv)
__weak_alias(libiconv_open, _iconv_open)
__weak_alias(libiconv_open_into, _iconv_open_into)
__weak_alias(libiconv_close, _iconv_close)
__weak_alias(libiconvlist, _iconvlist)
__weak_alias(libiconvctl, _iconvctl)
__weak_alias(libiconv_set_relocation_prefix, _iconv_set_relocation_prefix)
__weak_alias(iconv_canonicalize, _iconv_canonicalize)
#endif
__weak_reference(libiconv, iconv);
__weak_reference(libiconv_open, iconv_open);
__weak_reference(libiconv_open_into, iconv_open_into);
__weak_reference(libiconv_close, iconv_close);
__weak_reference(libiconvlist, iconvlist);
__weak_reference(libiconvctl, iconvctl);
__weak_reference(libiconv_set_relocation_prefix, iconv_set_relocation_prefix);
#define ISBADF(_h_) (!(_h_) || (_h_) == (iconv_t)-1)