* Added a TRANSACTION_IDLE notification that is sent when the transaction

hasn't been used for more than 2 seconds.
* Replaced the block_cache::lock benaphore with a recursive lock, so that
  you can call cache functions from within the notification listeners.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24737 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/os/drivers/fs_cache.h

@@ -14,7 +14,8 @@
 enum {
 	TRANSACTION_WRITTEN,
 	TRANSACTION_ABORTED,
-	TRANSACTION_ENDED
+	TRANSACTION_ENDED,
+	TRANSACTION_IDLE
 };
 
 typedef void (*transaction_notification_hook)(int32 id, int32 event,
@@ -22,7 +23,7 @@ typedef void (*transaction_notification_hook)(int32 id, int32 event,
 
 #ifdef __cplusplus
 extern "C" {
-#endif 
+#endif
 
 /* transactions */
 extern int32 cache_start_transaction(void *_cache);
@@ -88,6 +89,6 @@ extern status_t file_map_translate(void *_map, off_t offset, size_t size,
 
 #ifdef __cplusplus
 }
-#endif 
+#endif
 
 #endif	/* _FS_CACHE_H */

headers/private/fs_shell/fssh_api_wrapper.h

@@ -790,6 +790,7 @@
 #define TRANSACTION_WRITTEN				FSSH_TRANSACTION_WRITTEN
 #define TRANSACTION_ABORTED				FSSH_TRANSACTION_ABORTED
 #define TRANSACTION_ENDED				FSSH_TRANSACTION_ENDED
+#define TRANSACTION_IDLE				FSSH_TRANSACTION_IDLE
 
 #define transaction_notification_hook	fssh_transaction_notification_hook
 

headers/private/fs_shell/fssh_fs_cache.h

@@ -14,7 +14,8 @@
 enum {
 	FSSH_TRANSACTION_WRITTEN,
 	FSSH_TRANSACTION_ABORTED,
-	FSSH_TRANSACTION_ENDED
+	FSSH_TRANSACTION_ENDED,
+	FSSH_TRANSACTION_IDLE
 };
 
 typedef void (*fssh_transaction_notification_hook)(int32_t id, int32_t event,
@@ -22,7 +23,7 @@ typedef void (*fssh_transaction_notification_hook)(int32_t id, int32_t event,
 
 #ifdef __cplusplus
 extern "C" {
-#endif 
+#endif
 
 /* transactions */
 extern int32_t			fssh_cache_start_transaction(void *_cache);
@@ -110,6 +111,6 @@ extern fssh_status_t	fssh_file_map_translate(void *_map, fssh_off_t offset,
 
 #ifdef __cplusplus
 }
-#endif 
+#endif
 
 #endif	/* _FSSH_FS_CACHE_H */