int fclose(register FILE *stream)
{
int rv = 0;
__STDIO_AUTO_THREADLOCK_VAR;
#ifdef __STDIO_HAS_OPENLIST
#if !defined(__UCLIBC_HAS_THREADS__) || !defined(__STDIO_BUFFERS)
/* First, remove the file from the open file list. */
{
FILE *ptr;
__STDIO_THREADLOCK_OPENLIST_DEL;
__STDIO_THREADLOCK_OPENLIST_ADD;
ptr = _stdio_openlist;
if ((ptr = _stdio_openlist) == stream) {
_stdio_openlist = stream->__nextopen;
} else {
while (ptr) {
if (ptr->__nextopen == stream) {
ptr->__nextopen = stream->__nextopen;
break;
}
ptr = ptr->__nextopen;
}
}
__STDIO_THREADUNLOCK_OPENLIST_ADD;
__STDIO_THREADUNLOCK_OPENLIST_DEL;
}
#endif
#endif
__STDIO_AUTO_THREADLOCK(stream);
__STDIO_STREAM_VALIDATE(stream);
#ifdef __STDIO_BUFFERS
/* Write any pending buffered chars. */
if (__STDIO_STREAM_IS_WRITING(stream)) {
rv = fflush_unlocked(stream);
}
#endif
if (__CLOSE(stream) < 0) { /* Must close even if fflush failed. */
rv = EOF;
}
stream->__filedes = -1;
/* We need a way for freopen to know that a file has been closed.
* Since a file can't be both readonly and writeonly, that makes
* an effective signal. It also has the benefit of disabling
* transitions to either reading or writing. */
#if defined(__UCLIBC_HAS_THREADS__) && defined(__STDIO_BUFFERS)
/* Before we mark the file as closed, make sure we increment the openlist use count
* so it isn't freed under us while still cleaning up. */
__STDIO_OPENLIST_INC_USE;
#endif
stream->__modeflags &= (__FLAG_FREEBUF|__FLAG_FREEFILE);
stream->__modeflags |= (__FLAG_READONLY|__FLAG_WRITEONLY);
#ifndef NDEBUG
__STDIO_STREAM_RESET_GCS(stream);
/* Reinitialize everything (including putc since fflush could fail). */
__STDIO_STREAM_DISABLE_GETC(stream);
__STDIO_STREAM_DISABLE_PUTC(stream);
__STDIO_STREAM_INIT_BUFREAD_BUFPOS(stream);
# ifdef __UCLIBC_HAS_WCHAR__
stream->__ungot_width[0] = 0;
# endif
# ifdef __STDIO_MBSTATE
__INIT_MBSTATE(&(stream->__state));
# endif
#endif
__STDIO_AUTO_THREADUNLOCK(stream);
__STDIO_STREAM_FREE_BUFFER(stream);
#ifdef __UCLIBC_MJN3_ONLY__
#warning REMINDER: inefficient - locks and unlocks twice and walks whole list
#endif
#if defined(__UCLIBC_HAS_THREADS__) && defined(__STDIO_BUFFERS)
/* inefficient - locks/unlocks twice and walks whole list */
__STDIO_OPENLIST_INC_DEL_CNT;
__STDIO_OPENLIST_DEC_USE; /* This with free the file if necessary. */
#else
__STDIO_STREAM_FREE_FILE(stream);
#endif
return rv;
}
/* We assume here that we are the only remaining thread. */
void _stdio_term(void)
{
#if defined(__STDIO_BUFFERS) || defined(__UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__)
register FILE *ptr;
#ifdef __UCLIBC_HAS_THREADS__
/* First, make sure the open file list is unlocked. If it was
* locked, then I suppose there is a chance that a pointer in the
* chain might be corrupt due to a partial store.
*/
STDIO_INIT_MUTEX(_stdio_openlist_add_lock);
#warning check
#ifdef __STDIO_BUFFERS
STDIO_INIT_MUTEX(_stdio_openlist_del_lock);
#endif
/* Next we need to worry about the streams themselves. If a stream
* is currently locked, then it may be in an invalid state. So we
* 'disable' it in case a custom stream is stacked on top of it.
* Then we reinitialize the locks.
*/
for (ptr = _stdio_openlist ; ptr ; ptr = ptr->__nextopen ) {
if (__STDIO_ALWAYS_THREADTRYLOCK_CANCEL_UNSAFE(ptr)) {
/* The stream is already locked, so we don't want to touch it.
* However, if we have custom streams, we can't just close it
* or leave it locked since a custom stream may be stacked
* on top of it. So we do unlock it, while also disabling it.
*/
ptr->__modeflags = (__FLAG_READONLY|__FLAG_WRITEONLY);
__STDIO_STREAM_DISABLE_GETC(ptr);
__STDIO_STREAM_DISABLE_PUTC(ptr);
__STDIO_STREAM_INIT_BUFREAD_BUFPOS(ptr);
}
ptr->__user_locking = 1; /* Set locking mode to "by caller". */
STDIO_INIT_MUTEX(ptr->__lock); /* Shouldn't be necessary, but... */
}
#endif
/* Finally, flush all writing streams and shut down all custom streams.
* NOTE: We assume that any stacking by custom streams is done on top
* of streams previously allocated, and hence further down the
* list. Otherwise we have no way of knowing the order in which
* to shut them down.
* Remember that freopen() counts as a new allocation here, even
* though the stream is reused. That's because it moves the
* stream to the head of the list.
*/
for (ptr = _stdio_openlist ; ptr ; ptr = ptr->__nextopen ) {
#ifdef __STDIO_BUFFERS
/* Write any pending buffered chars. */
if (__STDIO_STREAM_IS_WRITING(ptr)) {
__STDIO_COMMIT_WRITE_BUFFER(ptr);
}
#endif
#ifdef __UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__
/* Actually close all custom streams to perform any special cleanup. */
if (ptr->__cookie != &ptr->__filedes) {
__CLOSE(ptr);
}
#endif
}
#endif
}
