/* define normal version that locks/unlocks, validates fh */
int __cdecl _write (
int fh,
const void *buf,
unsigned cnt
)
{
int r; /* return value */
/* validate handle */
_CHECK_FH_CLEAR_OSSERR_RETURN( fh, EBADF, -1 );
_VALIDATE_CLEAR_OSSERR_RETURN((fh >= 0 && (unsigned)fh < (unsigned)_nhandle), EBADF, -1);
_VALIDATE_CLEAR_OSSERR_RETURN((_osfile(fh) & FOPEN), EBADF, -1);
_lock_fh(fh); /* lock file */
__try {
if ( _osfile(fh) & FOPEN )
r = _write_nolock(fh, buf, cnt); /* write bytes */
else {
errno = EBADF;
_doserrno = 0; /* not o.s. error */
r = -1;
_ASSERTE(("Invalid file descriptor. File possibly closed by a different thread",0));
}
}
__finally {
_unlock_fh(fh); /* unlock file */
}
return r;
}
void __cdecl _wperror (
const wchar_t *wmessage
)
{
int fh = 2;
size_t size = 0;
char *amessage;
const char *sysmessage;
/* convert WCS string into ASCII string */
if ( wmessage && *wmessage )
{
_ERRCHECK_EINVAL_ERANGE(wcstombs_s( &size, NULL, 0, wmessage, INT_MAX));
if ( size==0 || (amessage = (char *)_calloc_crt(size, sizeof(char))) == NULL )
return;
if ( _ERRCHECK_EINVAL_ERANGE(wcstombs_s(NULL, amessage, size, wmessage, _TRUNCATE)) != 0)
{
_free_crt(amessage);
return;
}
}
else
amessage = NULL;
_lock_fh( fh ); /* acquire file handle lock */
__try {
if ( amessage )
{
_write_nolock(fh,(char *)amessage,(unsigned)strlen(amessage));
_write_nolock(fh,": ",2);
}
_free_crt(amessage); /* note: freeing NULL is legal and benign */
sysmessage = _get_sys_err_msg( errno );
_write_nolock(fh, sysmessage,(unsigned)strlen(sysmessage));
_write_nolock(fh,"\n",1);
}
__finally {
_unlock_fh( fh ); /* release file handle lock */
}
}
extern "C" void __cdecl perror(char const* const user_prefix)
{
int const fh = 2;
__acrt_lowio_lock_fh(fh);
__try
{
if (user_prefix != nullptr && user_prefix[0] != '\0')
{
_write_nolock(fh, user_prefix, static_cast<unsigned>(strlen(user_prefix)));
_write_nolock(fh, ": ", 2);
}
char const* const system_message = _get_sys_err_msg(errno);
_write_nolock(fh, system_message, static_cast<unsigned>(strlen(system_message)));
_write_nolock(fh, "\n", 1);
}
__finally
{
__acrt_lowio_unlock_fh( fh );
}
}