extern "C" {
#endif
+extern int bluesky_verbose;
+
+/* Target cache size levels. */
+extern int bluesky_watermark_low_dirty;
+extern int bluesky_watermark_medium_dirty;
+extern int bluesky_watermark_high_dirty;
+
+extern int bluesky_watermark_low_total;
+extern int bluesky_watermark_medium_total;
+extern int bluesky_watermark_high_total;
+
/* TODO: Make this go away entirely. */
BlueSkyFS *bluesky_new_fs(gchar *name);
+/* Linked list update functions for LRU lists. */
+void bluesky_list_unlink(GList *head, GList *item);
+GList *bluesky_list_prepend(GList *head, BlueSkyInode *inode);
+GList *bluesky_list_append(GList *head, BlueSkyInode *inode);
+BlueSkyInode *bluesky_list_head(GList *head);
+BlueSkyInode *bluesky_list_tail(GList *head);
+
/* Serialization and deserialization of filesystem data for storing to
* persistent storage. */
void bluesky_serialize_superblock(GString *out, BlueSkyFS *fs);
BlueSkyFS *bluesky_deserialize_superblock(const gchar *buf);
void bluesky_serialize_inode(GString *out, BlueSkyInode *inode);
-BlueSkyInode *bluesky_deserialize_inode(BlueSkyFS *fs, const gchar *buf);
+gboolean bluesky_deserialize_inode(BlueSkyInode *inode, const gchar *buf);
/* Storage layer. Requests can be performed asynchronously, so these objects
* help keep track of operations in progress. */
STORE_OP_GET,
STORE_OP_PUT,
STORE_OP_DELETE,
+ STORE_OP_BARRIER, // Waits for other selected operations to complete
} BlueSkyStoreOp;
typedef enum {
ASYNC_COMPLETE, // Operation finished, results available
} BlueSkyAsyncStatus;
-typedef struct {
+struct BlueSkyNotifierList;
+typedef struct _BlueSkyStoreAsync BlueSkyStoreAsync;
+struct _BlueSkyStoreAsync {
BlueSkyStore *store;
GMutex *lock;
GCond *completion_cond; /* Used to wait for operation to complete. */
+ gint refcount; /* Reference count for destruction. */
+
BlueSkyAsyncStatus status;
BlueSkyStoreOp op;
BlueSkyRCStr *data; /* Data read/to write */
int result; /* Result code; 0 for success. */
+ struct BlueSkyNotifierList *notifiers;
+ gint notifier_count;
+
+ /* The barrier waiting on this operation. Support for more than one
+ * barrier for a single async is not well-supported and should be avoided
+ * if possible. */
+ BlueSkyStoreAsync *barrier;
+
+ bluesky_time_hires start_time; /* Time operation was submitted. */
+ bluesky_time_hires exec_time; /* Time processing started on operation. */
gpointer store_private; /* For use by the storage implementation */
-} BlueSkyStoreAsync;
+};
+
+/* Support for notification lists. These are lists of one-shot functions which
+ * can be called when certain events--primarily, competed storage
+ * events--occur. Multiple notifiers can be added, but no particular order is
+ * guaranteed for the notification functions to be called. */
+struct BlueSkyNotifierList {
+ struct BlueSkyNotifierList *next;
+ GFunc func;
+ BlueSkyStoreAsync *async;
+ gpointer user_data; // Passed to the function when called
+};
/* The abstraction layer for storage, allowing multiple implementations. */
typedef struct {
/* Create a new store instance and return a handle to it. */
- gpointer (*create)();
+ gpointer (*create)(const gchar *path);
/* Clean up any resources used by this store. */
void (*destroy)(gpointer store);
const gchar *name);
BlueSkyStoreAsync *bluesky_store_async_new(BlueSkyStore *store);
+gpointer bluesky_store_async_get_handle(BlueSkyStoreAsync *async);
+void bluesky_store_async_ref(BlueSkyStoreAsync *async);
+void bluesky_store_async_unref(BlueSkyStoreAsync *async);
void bluesky_store_async_wait(BlueSkyStoreAsync *async);
+void bluesky_store_async_add_notifier(BlueSkyStoreAsync *async,
+ GFunc func, gpointer user_data);
void bluesky_store_async_mark_complete(BlueSkyStoreAsync *async);
+void bluesky_store_async_submit(BlueSkyStoreAsync *async);
+void bluesky_store_sync(BlueSkyStore *store);
+
+void bluesky_store_add_barrier(BlueSkyStoreAsync *barrier,
+ BlueSkyStoreAsync *async);
+
+void bluesky_inode_start_sync(BlueSkyInode *inode, BlueSkyStoreAsync *barrier);
+
+void bluesky_block_touch(BlueSkyInode *inode, uint64_t i);
+void bluesky_block_fetch(BlueSkyFS *fs, BlueSkyBlock *block,
+ BlueSkyStoreAsync *barrier);
+void bluesky_block_flush(BlueSkyFS *fs, BlueSkyBlock *block,
+ BlueSkyStoreAsync *barrier);
+void bluesky_file_flush(BlueSkyInode *inode, BlueSkyStoreAsync *barrier);
+void bluesky_file_drop_cached(BlueSkyInode *inode);
#ifdef __cplusplus
}