1 #ifndef FSMONITOR_DAEMON_H
2 #define FSMONITOR_DAEMON_H
4 #ifdef HAVE_FSMONITOR_DAEMON_BACKEND
8 #include "run-command.h"
9 #include "simple-ipc.h"
10 #include "thread-utils.h"
12 struct fsmonitor_batch;
13 struct fsmonitor_token_data;
16 * Create a new batch of path(s). The returned batch is considered
17 * private and not linked into the fsmonitor daemon state. The caller
18 * should fill this batch with one or more paths and then publish it.
20 struct fsmonitor_batch *fsmonitor_batch__new(void);
23 * Free this batch and return the value of the batch->next field.
25 struct fsmonitor_batch *fsmonitor_batch__pop(struct fsmonitor_batch *batch);
28 * Add this path to this batch of modified files.
30 * The batch should be private and NOT (yet) linked into the fsmonitor
31 * daemon state and therefore not yet visible to worker threads and so
32 * no locking is required.
34 void fsmonitor_batch__add_path(struct fsmonitor_batch *batch, const char *path);
36 struct fsmonitor_daemon_backend_data; /* opaque platform-specific data */
38 struct fsmonitor_daemon_state {
39 pthread_t listener_thread;
40 pthread_mutex_t main_lock;
42 struct strbuf path_worktree_watch;
43 struct strbuf path_gitdir_watch;
44 int nr_paths_watching;
46 struct fsmonitor_token_data *current_token_data;
48 struct strbuf path_cookie_prefix;
49 pthread_cond_t cookies_cond;
51 struct hashmap cookies;
54 struct fsmonitor_daemon_backend_data *backend_data;
56 struct ipc_server_data *ipc_server_data;
60 * Pathname classifications.
62 * The daemon classifies the pathnames that it receives from file
63 * system notification events into the following categories and uses
64 * that to decide whether clients are told about them. (And to watch
65 * for file system synchronization events.)
67 * The client should only care about paths within the working
68 * directory proper (inside the working directory and not ".git" nor
69 * inside of ".git/"). That is, the client has read the index and is
70 * asking for a list of any paths in the working directory that have
71 * been modified since the last token. The client does not care about
72 * file system changes within the .git directory (such as new loose
73 * objects or packfiles). So the client will only receive paths that
74 * are classified as IS_WORKDIR_PATH.
76 * The daemon uses the IS_DOT_GIT and IS_GITDIR internally to mean the
77 * exact ".git" directory or GITDIR. If the daemon receives a delete
78 * event for either of these directories, it will automatically
79 * shutdown, for example.
81 * Note that the daemon DOES NOT explicitly watch nor special case the
82 * ".git/index" file. The daemon does not read the index and does not
83 * have any internal index-relative state. The daemon only collects
84 * the set of modified paths within the working directory.
86 enum fsmonitor_path_type {
91 IS_INSIDE_DOT_GIT_WITH_COOKIE_PREFIX,
95 IS_INSIDE_GITDIR_WITH_COOKIE_PREFIX,
101 * Classify a pathname relative to the root of the working directory.
103 enum fsmonitor_path_type fsmonitor_classify_path_workdir_relative(
104 const char *relative_path);
107 * Classify a pathname relative to a <gitdir> that is external to the
108 * worktree directory.
110 enum fsmonitor_path_type fsmonitor_classify_path_gitdir_relative(
111 const char *relative_path);
114 * Classify an absolute pathname received from a filesystem event.
116 enum fsmonitor_path_type fsmonitor_classify_path_absolute(
117 struct fsmonitor_daemon_state *state,
121 * Prepend the this batch of path(s) onto the list of batches associated
122 * with the current token. This makes the batch visible to worker threads.
124 * The caller no longer owns the batch and must not free it.
126 * Wake up the client threads waiting on these cookies.
128 void fsmonitor_publish(struct fsmonitor_daemon_state *state,
129 struct fsmonitor_batch *batch,
130 const struct string_list *cookie_names);
133 * If the platform-specific layer loses sync with the filesystem,
134 * it should call this to invalidate cached data and abort waiting
137 void fsmonitor_force_resync(struct fsmonitor_daemon_state *state);
139 #endif /* HAVE_FSMONITOR_DAEMON_BACKEND */
140 #endif /* FSMONITOR_DAEMON_H */