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/*
* Copyright (C) 2003 Serge van den Boom
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
* Nota bene: later versions of the GNU General Public License do not apply
* to this program.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include "physical.h"
#ifdef uio_MEM_DEBUG
# include "memdebug.h"
#endif
#include "uioport.h"
static inline uio_PRoot *uio_PRoot_alloc(void);
static inline void uio_PRoot_free(uio_PRoot *pRoot);
// NB: ref counter is not incremented
uio_PDirHandle *
uio_PRoot_getRootDirHandle(uio_PRoot *pRoot) {
return pRoot->rootDir;
}
void
uio_PRoot_deletePRootExtra(uio_PRoot *pRoot) {
if (pRoot->extra == NULL)
return;
assert(pRoot->handler->deletePRootExtra != NULL);
pRoot->handler->deletePRootExtra(pRoot->extra);
}
// note: sets refMount count to 1
// set handlerRef count to 0
uio_PRoot *
uio_PRoot_new(uio_PDirHandle *topDirHandle,
uio_FileSystemHandler *handler, uio_Handle *handle,
uio_PRootExtra extra, int flags) {
uio_PRoot *pRoot;
pRoot = uio_PRoot_alloc();
pRoot->mountRef = 1;
pRoot->handleRef = 0;
pRoot->rootDir = topDirHandle;
pRoot->handler = handler;
pRoot->handle = handle;
pRoot->extra = extra;
pRoot->flags = flags;
#ifdef uio_PROOT_HAVE_CLOSE_HANDLERS
pRoot->numCloseHandlers = 0;
pRoot->closeHandlers = NULL;
#endif
return pRoot;
}
#ifdef uio_PROOT_HAVE_CLOSE_HANDLERS
// Closehandlers code disabled.
// It was only meant for internal use, but I don't need it any more.
// Keeping it around for a while until I'm confident I won't need it in the
// future.
void
uio_PRoot_addCloseHandler(uio_PRoot *pRoot, void (*fun)(void *), void *arg) {
pRoot->numCloseHandlers++;
pRoot->closeHandlers = uio_realloc(pRoot->closeHandlers,
pRoot->numCloseHandlers * sizeof (uio_PRoot_CloseHandler));
pRoot->closeHandlers[pRoot->numCloseHandlers - 1].fun = fun;
pRoot->closeHandlers[pRoot->numCloseHandlers - 1].arg = arg;
}
void
uio_PRoot_callCloseHandlers(uio_PRoot *pRoot) {
int i;
i = pRoot->numCloseHandlers;
while (i--) {
uio_PRoot_CloseHandler *closeHandler;
closeHandler = &pRoot->closeHandlers[i];
(closeHandler->fun)(closeHandler->arg);
}
}
void
uio_PRoot_removeCloseHandlers(uio_PRoot *pRoot) {
pRoot->numCloseHandlers = 0;
if (pRoot->closeHandlers != NULL)
uio_free(pRoot->closeHandlers);
pRoot->closeHandlers = NULL;
}
#endif
static inline void
uio_PRoot_delete(uio_PRoot *pRoot) {
#ifdef uio_PROOT_HAVE_CLOSE_HANDLERS
uio_PRoot_callCloseHandlers(pRoot);
uio_PRoot_removeCloseHandlers(pRoot);
#endif
assert(pRoot->handler->umount != NULL);
pRoot->handler->umount(pRoot);
if (pRoot->handle)
uio_Handle_unref(pRoot->handle);
uio_PRoot_deletePRootExtra(pRoot);
uio_PRoot_free(pRoot);
}
static inline uio_PRoot *
uio_PRoot_alloc(void) {
uio_PRoot *result = uio_malloc(sizeof (uio_PRoot));
#ifdef uio_MEM_DEBUG
uio_MemDebug_debugAlloc(uio_PRoot, (void *) result);
#endif
return result;
}
static inline void
uio_PRoot_free(uio_PRoot *pRoot) {
#ifdef uio_MEM_DEBUG
uio_MemDebug_debugFree(uio_PRoot, (void *) pRoot);
#endif
uio_free(pRoot);
}
void
uio_PRoot_refHandle(uio_PRoot *pRoot) {
pRoot->handleRef++;
}
void
uio_PRoot_unrefHandle(uio_PRoot *pRoot) {
assert(pRoot->handleRef > 0);
pRoot->handleRef--;
if (pRoot->handleRef == 0 && pRoot->mountRef == 0)
uio_PRoot_delete(pRoot);
}
void
uio_PRoot_refMount(uio_PRoot *pRoot) {
#ifdef uio_MEM_DEBUG
uio_MemDebug_debugRef(uio_PRoot, (void *) pRoot);
#endif
pRoot->mountRef++;
}
void
uio_PRoot_unrefMount(uio_PRoot *pRoot) {
assert(pRoot->mountRef > 0);
#ifdef uio_MEM_DEBUG
uio_MemDebug_debugUnref(uio_PRoot, (void *) pRoot);
#endif
pRoot->mountRef--;
if (pRoot->mountRef == 0 && pRoot->handleRef == 0)
uio_PRoot_delete(pRoot);
}
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