tools/fs_shell/file_cache.cpp

59 typedef fssh_status_t (*cache_func)(file_cache_ref *ref, void *cookie,
83 read_from_file(file_cache_ref *ref, void *cookie, fssh_off_t offset,
90 	fssh_mutex_unlock(&ref->lock);
92 	fssh_status_t status = vfs_read_pages(ref->node, cookie,
95 	fssh_mutex_lock(&ref->lock);
102 write_to_file(file_cache_ref *ref, void *cookie, fssh_off_t offset,
109 	fssh_mutex_unlock(&ref->lock);
111 	fssh_status_t status = vfs_write_pages(ref->node, cookie,
114 	fssh_mutex_lock(&ref->lock);
121 satisfy_cache_io(file_cache_ref *ref, void *cookie, cache_func function,
131 	fssh_status_t status = function(ref, cookie, lastOffset, lastPageOffset,
149 		fssh_panic("cache_io() called with NULL ref!\n");
151 	file_cache_ref *ref = (file_cache_ref *)_cacheRef;
152 	fssh_off_t fileSize = ref->virtual_size;
154 	TRACE(("cache_io(ref = %p, offset = %lld, buffer = %p, size = %u, %s)\n",
155 		ref, offset, (void *)buffer, *_size, doWrite ? "write" : "read"));
194 	MutexLocker locker(ref->lock);
210 			fssh_status_t status = satisfy_cache_io(ref, cookie, function,
220 	return function(ref, cookie, lastOffset, lastPageOffset, lastBuffer,
241 	file_cache_ref *ref = new(nothrow) file_cache_ref;
242 	if (ref == NULL)
245 	ref->mountID = mountID;
246 	ref->nodeID = vnodeID;
247 	ref->virtual_size = size;
250 	fssh_status_t error = vfs_lookup_vnode(mountID, vnodeID, &ref->node);
254 		delete ref;
262 	fssh_mutex_init(&ref->lock, buffer);
264 	return ref;
271 	file_cache_ref *ref = (file_cache_ref *)_cacheRef;
273 	if (ref == NULL)
276 	TRACE(("file_cache_delete(ref = %p)\n", ref));
278 	fssh_mutex_lock(&ref->lock);
279 	fssh_mutex_destroy(&ref->lock);
281 	delete ref;
310 	file_cache_ref *ref = (file_cache_ref *)_cacheRef;
312 	TRACE(("file_cache_set_size(ref = %p, size = %lld)\n", ref, size));
314 	if (ref == NULL)
317 	fssh_mutex_lock(&ref->lock);
318 	ref->virtual_size = size;
319 	fssh_mutex_unlock(&ref->lock);
328 	file_cache_ref *ref = (file_cache_ref *)_cacheRef;
329 	if (ref == NULL)
340 	file_cache_ref *ref = (file_cache_ref *)_cacheRef;
342 	TRACE(("file_cache_read(ref = %p, offset = %lld, buffer = %p, size = %u)\n",
343 		ref, offset, bufferBase, *_size));
345 	return cache_io(ref, cookie, offset, (fssh_addr_t)bufferBase, _size, false);
353 	file_cache_ref *ref = (file_cache_ref *)_cacheRef;
355 	fssh_status_t status = cache_io(ref, cookie, offset,
357 	TRACE(("file_cache_write(ref = %p, offset = %lld, buffer = %p, size = %u) = %d\n",
358 		ref, offset, buffer, *_size, status));