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authorMichael Haggerty <mhagger@alum.mit.edu>2014-10-01 10:28:42 (GMT)
committerJunio C Hamano <gitster@pobox.com>2014-10-01 20:56:14 (GMT)
commit697cc8efd944a32ca472337cd6640004c474b788 (patch)
treea8999149e7e907e2b65b6617bd5d45d6c675a72e
parent216aab1e3d8eef088dc9785febce24a110e9f835 (diff)
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lockfile.h: extract new header file for the functions in lockfile.c
Move the interface declaration for the functions in lockfile.c from cache.h to a new file, lockfile.h. Add #includes where necessary (and remove some redundant includes of cache.h by files that already include builtin.h). Move the documentation of the lock_file state diagram from lockfile.c to the new header file. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
-rw-r--r--builtin/add.c1
-rw-r--r--builtin/apply.c1
-rw-r--r--builtin/checkout-index.c2
-rw-r--r--builtin/checkout.c2
-rw-r--r--builtin/clone.c1
-rw-r--r--builtin/commit.c1
-rw-r--r--builtin/describe.c1
-rw-r--r--builtin/diff.c1
-rw-r--r--builtin/gc.c2
-rw-r--r--builtin/merge.c1
-rw-r--r--builtin/mv.c2
-rw-r--r--builtin/read-tree.c1
-rw-r--r--builtin/receive-pack.c1
-rw-r--r--builtin/reflog.c2
-rw-r--r--builtin/reset.c1
-rw-r--r--builtin/rm.c2
-rw-r--r--builtin/update-index.c1
-rw-r--r--bundle.c1
-rw-r--r--cache-tree.c1
-rw-r--r--cache.h27
-rw-r--r--config.c1
-rw-r--r--credential-store.c1
-rw-r--r--fast-import.c1
-rw-r--r--fetch-pack.c1
-rw-r--r--lockfile.c52
-rw-r--r--lockfile.h84
-rw-r--r--merge-recursive.c1
-rw-r--r--merge.c1
-rw-r--r--read-cache.c1
-rw-r--r--refs.c1
-rw-r--r--rerere.c1
-rw-r--r--sequencer.c1
-rw-r--r--sha1_file.c1
-rw-r--r--shallow.c1
-rw-r--r--test-scrap-cache-tree.c1
35 files changed, 118 insertions, 83 deletions
diff --git a/builtin/add.c b/builtin/add.c
index 352b85e..ae6d3e2 100644
--- a/builtin/add.c
+++ b/builtin/add.c
@@ -5,6 +5,7 @@
*/
#include "cache.h"
#include "builtin.h"
+#include "lockfile.h"
#include "dir.h"
#include "pathspec.h"
#include "exec_cmd.h"
diff --git a/builtin/apply.c b/builtin/apply.c
index 8714a88..69efb0e 100644
--- a/builtin/apply.c
+++ b/builtin/apply.c
@@ -7,6 +7,7 @@
*
*/
#include "cache.h"
+#include "lockfile.h"
#include "cache-tree.h"
#include "quote.h"
#include "blob.h"
diff --git a/builtin/checkout-index.c b/builtin/checkout-index.c
index 05edd9e..383dccf 100644
--- a/builtin/checkout-index.c
+++ b/builtin/checkout-index.c
@@ -5,7 +5,7 @@
*
*/
#include "builtin.h"
-#include "cache.h"
+#include "lockfile.h"
#include "quote.h"
#include "cache-tree.h"
#include "parse-options.h"
diff --git a/builtin/checkout.c b/builtin/checkout.c
index 8afdf2b..570bb09 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -1,5 +1,5 @@
-#include "cache.h"
#include "builtin.h"
+#include "lockfile.h"
#include "parse-options.h"
#include "refs.h"
#include "commit.h"
diff --git a/builtin/clone.c b/builtin/clone.c
index 3927edf..d3bf953 100644
--- a/builtin/clone.c
+++ b/builtin/clone.c
@@ -9,6 +9,7 @@
*/
#include "builtin.h"
+#include "lockfile.h"
#include "parse-options.h"
#include "fetch-pack.h"
#include "refs.h"
diff --git a/builtin/commit.c b/builtin/commit.c
index f55e809..c230018 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -6,6 +6,7 @@
*/
#include "cache.h"
+#include "lockfile.h"
#include "cache-tree.h"
#include "color.h"
#include "dir.h"
diff --git a/builtin/describe.c b/builtin/describe.c
index ee6a3b9..9103193 100644
--- a/builtin/describe.c
+++ b/builtin/describe.c
@@ -1,4 +1,5 @@
#include "cache.h"
+#include "lockfile.h"
#include "commit.h"
#include "tag.h"
#include "refs.h"
diff --git a/builtin/diff.c b/builtin/diff.c
index 0f247d2..4326fa5 100644
--- a/builtin/diff.c
+++ b/builtin/diff.c
@@ -4,6 +4,7 @@
* Copyright (c) 2006 Junio C Hamano
*/
#include "cache.h"
+#include "lockfile.h"
#include "color.h"
#include "commit.h"
#include "blob.h"
diff --git a/builtin/gc.c b/builtin/gc.c
index ced1456..005adbe 100644
--- a/builtin/gc.c
+++ b/builtin/gc.c
@@ -11,7 +11,7 @@
*/
#include "builtin.h"
-#include "cache.h"
+#include "lockfile.h"
#include "parse-options.h"
#include "run-command.h"
#include "sigchain.h"
diff --git a/builtin/merge.c b/builtin/merge.c
index be07f27..4513fad 100644
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -9,6 +9,7 @@
#include "cache.h"
#include "parse-options.h"
#include "builtin.h"
+#include "lockfile.h"
#include "run-command.h"
#include "diff.h"
#include "refs.h"
diff --git a/builtin/mv.c b/builtin/mv.c
index 8883baa..563d05b 100644
--- a/builtin/mv.c
+++ b/builtin/mv.c
@@ -3,8 +3,8 @@
*
* Copyright (C) 2006 Johannes Schindelin
*/
-#include "cache.h"
#include "builtin.h"
+#include "lockfile.h"
#include "dir.h"
#include "cache-tree.h"
#include "string-list.h"
diff --git a/builtin/read-tree.c b/builtin/read-tree.c
index e7e1c33..43b47f7 100644
--- a/builtin/read-tree.c
+++ b/builtin/read-tree.c
@@ -5,6 +5,7 @@
*/
#include "cache.h"
+#include "lockfile.h"
#include "object.h"
#include "tree.h"
#include "tree-walk.h"
diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index daf0600..10fa25d 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -1,4 +1,5 @@
#include "builtin.h"
+#include "lockfile.h"
#include "pack.h"
#include "refs.h"
#include "pkt-line.h"
diff --git a/builtin/reflog.c b/builtin/reflog.c
index 7c78b15..b6388f7 100644
--- a/builtin/reflog.c
+++ b/builtin/reflog.c
@@ -1,5 +1,5 @@
-#include "cache.h"
#include "builtin.h"
+#include "lockfile.h"
#include "commit.h"
#include "refs.h"
#include "dir.h"
diff --git a/builtin/reset.c b/builtin/reset.c
index 855d478..4c08ddc 100644
--- a/builtin/reset.c
+++ b/builtin/reset.c
@@ -8,6 +8,7 @@
* Copyright (c) 2005, 2006 Linus Torvalds and Junio C Hamano
*/
#include "builtin.h"
+#include "lockfile.h"
#include "tag.h"
#include "object.h"
#include "commit.h"
diff --git a/builtin/rm.c b/builtin/rm.c
index 2b61d3b..d8a9c86 100644
--- a/builtin/rm.c
+++ b/builtin/rm.c
@@ -3,8 +3,8 @@
*
* Copyright (C) Linus Torvalds 2006
*/
-#include "cache.h"
#include "builtin.h"
+#include "lockfile.h"
#include "dir.h"
#include "cache-tree.h"
#include "tree-walk.h"
diff --git a/builtin/update-index.c b/builtin/update-index.c
index 6c95988..b0e3dc9 100644
--- a/builtin/update-index.c
+++ b/builtin/update-index.c
@@ -4,6 +4,7 @@
* Copyright (C) Linus Torvalds, 2005
*/
#include "cache.h"
+#include "lockfile.h"
#include "quote.h"
#include "cache-tree.h"
#include "tree-walk.h"
diff --git a/bundle.c b/bundle.c
index b2b89fe..891a3ca 100644
--- a/bundle.c
+++ b/bundle.c
@@ -1,4 +1,5 @@
#include "cache.h"
+#include "lockfile.h"
#include "bundle.h"
#include "object.h"
#include "commit.h"
diff --git a/cache-tree.c b/cache-tree.c
index 75a54fd..215202c 100644
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -1,4 +1,5 @@
#include "cache.h"
+#include "lockfile.h"
#include "tree.h"
#include "tree-walk.h"
#include "cache-tree.h"
diff --git a/cache.h b/cache.h
index d19e57f..b71ceb2 100644
--- a/cache.h
+++ b/cache.h
@@ -570,36 +570,11 @@ extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
#define REFRESH_IN_PORCELAIN 0x0020 /* user friendly output, not "needs update" */
extern int refresh_index(struct index_state *, unsigned int flags, const struct pathspec *pathspec, char *seen, const char *header_msg);
-/* String appended to a filename to derive the lockfile name: */
-#define LOCK_SUFFIX ".lock"
-#define LOCK_SUFFIX_LEN 5
-
-struct lock_file {
- struct lock_file *volatile next;
- volatile sig_atomic_t active;
- volatile int fd;
- volatile pid_t owner;
- char on_list;
- struct strbuf filename;
-};
-#define LOCK_DIE_ON_ERROR 1
-#define LOCK_NO_DEREF 2
-extern int unable_to_lock_error(const char *path, int err);
-extern void unable_to_lock_message(const char *path, int err,
- struct strbuf *buf);
-extern NORETURN void unable_to_lock_die(const char *path, int err);
-extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
-extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
-extern char *get_locked_file_path(struct lock_file *);
-extern int commit_lock_file_to(struct lock_file *, const char *path);
-extern int commit_lock_file(struct lock_file *);
-extern int reopen_lock_file(struct lock_file *);
extern void update_index_if_able(struct index_state *, struct lock_file *);
extern int hold_locked_index(struct lock_file *, int);
extern void set_alternate_index_output(const char *);
-extern int close_lock_file(struct lock_file *);
-extern void rollback_lock_file(struct lock_file *);
+
extern int delete_ref(const char *, const unsigned char *sha1, int delopt);
/* Environment bits from configuration mechanism */
diff --git a/config.c b/config.c
index 2110779..c31d4d2 100644
--- a/config.c
+++ b/config.c
@@ -6,6 +6,7 @@
*
*/
#include "cache.h"
+#include "lockfile.h"
#include "exec_cmd.h"
#include "strbuf.h"
#include "quote.h"
diff --git a/credential-store.c b/credential-store.c
index f9146e5..d435514 100644
--- a/credential-store.c
+++ b/credential-store.c
@@ -1,4 +1,5 @@
#include "cache.h"
+#include "lockfile.h"
#include "credential.h"
#include "string-list.h"
#include "parse-options.h"
diff --git a/fast-import.c b/fast-import.c
index 783c684..deadc33 100644
--- a/fast-import.c
+++ b/fast-import.c
@@ -153,6 +153,7 @@ Format of STDIN stream:
#include "builtin.h"
#include "cache.h"
+#include "lockfile.h"
#include "object.h"
#include "blob.h"
#include "tree.h"
diff --git a/fetch-pack.c b/fetch-pack.c
index 7487aa7..655ee64 100644
--- a/fetch-pack.c
+++ b/fetch-pack.c
@@ -1,4 +1,5 @@
#include "cache.h"
+#include "lockfile.h"
#include "refs.h"
#include "pkt-line.h"
#include "commit.h"
diff --git a/lockfile.c b/lockfile.c
index 63f4e94..d27e61c 100644
--- a/lockfile.c
+++ b/lockfile.c
@@ -2,59 +2,9 @@
* Copyright (c) 2005, Junio C Hamano
*/
#include "cache.h"
+#include "lockfile.h"
#include "sigchain.h"
-/*
- * File write-locks as used by Git.
- *
- * For an overview of how to use the lockfile API, please see
- *
- * Documentation/technical/api-lockfile.txt
- *
- * This module keeps track of all locked files in lock_file_list for
- * use at cleanup. This list and the lock_file objects that comprise
- * it must be kept in self-consistent states at all time, because the
- * program can be interrupted any time by a signal, in which case the
- * signal handler will walk through the list attempting to clean up
- * any open lock files.
- *
- * A lockfile is owned by the process that created it. The lock_file
- * object has an "owner" field that records its owner. This field is
- * used to prevent a forked process from closing a lockfile created by
- * its parent.
- *
- * The possible states of a lock_file object are as follows:
- *
- * - Uninitialized. In this state the object's on_list field must be
- * zero but the rest of its contents need not be initialized. As
- * soon as the object is used in any way, it is irrevocably
- * registered in the lock_file_list, and on_list is set.
- *
- * - Locked, lockfile open (after hold_lock_file_for_update(),
- * hold_lock_file_for_append(), or reopen_lock_file()). In this
- * state:
- * - the lockfile exists
- * - active is set
- * - filename holds the filename of the lockfile
- * - fd holds a file descriptor open for writing to the lockfile
- * - owner holds the PID of the process that locked the file
- *
- * - Locked, lockfile closed (after successful close_lock_file()).
- * Same as the previous state, except that the lockfile is closed
- * and fd is -1.
- *
- * - Unlocked (after commit_lock_file(), commit_lock_file_to(),
- * rollback_lock_file(), a failed attempt to lock, or a failed
- * close_lock_file()). In this state:
- * - active is unset
- * - filename is empty (usually, though there are transitory
- * states in which this condition doesn't hold). Client code should
- * *not* rely on the filename being empty in this state.
- * - fd is -1
- * - the object is left registered in the lock_file_list, and
- * on_list is set.
- */
-
static struct lock_file *volatile lock_file_list;
static void remove_lock_files(void)
diff --git a/lockfile.h b/lockfile.h
new file mode 100644
index 0000000..9059e89
--- /dev/null
+++ b/lockfile.h
@@ -0,0 +1,84 @@
+#ifndef LOCKFILE_H
+#define LOCKFILE_H
+
+/*
+ * File write-locks as used by Git.
+ *
+ * For an overview of how to use the lockfile API, please see
+ *
+ * Documentation/technical/api-lockfile.txt
+ *
+ * This module keeps track of all locked files in lock_file_list for
+ * use at cleanup. This list and the lock_file objects that comprise
+ * it must be kept in self-consistent states at all time, because the
+ * program can be interrupted any time by a signal, in which case the
+ * signal handler will walk through the list attempting to clean up
+ * any open lock files.
+ *
+ * A lockfile is owned by the process that created it. The lock_file
+ * object has an "owner" field that records its owner. This field is
+ * used to prevent a forked process from closing a lockfile created by
+ * its parent.
+ *
+ * The possible states of a lock_file object are as follows:
+ *
+ * - Uninitialized. In this state the object's on_list field must be
+ * zero but the rest of its contents need not be initialized. As
+ * soon as the object is used in any way, it is irrevocably
+ * registered in the lock_file_list, and on_list is set.
+ *
+ * - Locked, lockfile open (after hold_lock_file_for_update(),
+ * hold_lock_file_for_append(), or reopen_lock_file()). In this
+ * state:
+ * - the lockfile exists
+ * - active is set
+ * - filename holds the filename of the lockfile
+ * - fd holds a file descriptor open for writing to the lockfile
+ * - owner holds the PID of the process that locked the file
+ *
+ * - Locked, lockfile closed (after successful close_lock_file()).
+ * Same as the previous state, except that the lockfile is closed
+ * and fd is -1.
+ *
+ * - Unlocked (after commit_lock_file(), commit_lock_file_to(),
+ * rollback_lock_file(), a failed attempt to lock, or a failed
+ * close_lock_file()). In this state:
+ * - active is unset
+ * - filename is empty (usually, though there are transitory
+ * states in which this condition doesn't hold). Client code should
+ * *not* rely on the filename being empty in this state.
+ * - fd is -1
+ * - the object is left registered in the lock_file_list, and
+ * on_list is set.
+ */
+
+struct lock_file {
+ struct lock_file *volatile next;
+ volatile sig_atomic_t active;
+ volatile int fd;
+ volatile pid_t owner;
+ char on_list;
+ struct strbuf filename;
+};
+
+/* String appended to a filename to derive the lockfile name: */
+#define LOCK_SUFFIX ".lock"
+#define LOCK_SUFFIX_LEN 5
+
+#define LOCK_DIE_ON_ERROR 1
+#define LOCK_NO_DEREF 2
+
+extern int unable_to_lock_error(const char *path, int err);
+extern void unable_to_lock_message(const char *path, int err,
+ struct strbuf *buf);
+extern NORETURN void unable_to_lock_die(const char *path, int err);
+extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
+extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
+extern char *get_locked_file_path(struct lock_file *);
+extern int commit_lock_file_to(struct lock_file *, const char *path);
+extern int commit_lock_file(struct lock_file *);
+extern int reopen_lock_file(struct lock_file *);
+extern int close_lock_file(struct lock_file *);
+extern void rollback_lock_file(struct lock_file *);
+
+#endif /* LOCKFILE_H */
diff --git a/merge-recursive.c b/merge-recursive.c
index 8ad4be8..4b0884b 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -5,6 +5,7 @@
*/
#include "advice.h"
#include "cache.h"
+#include "lockfile.h"
#include "cache-tree.h"
#include "commit.h"
#include "blob.h"
diff --git a/merge.c b/merge.c
index 74ced7f..fcff632 100644
--- a/merge.c
+++ b/merge.c
@@ -1,4 +1,5 @@
#include "cache.h"
+#include "lockfile.h"
#include "commit.h"
#include "run-command.h"
#include "resolve-undo.h"
diff --git a/read-cache.c b/read-cache.c
index 9f137e7..8f3e9eb 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -5,6 +5,7 @@
*/
#define NO_THE_INDEX_COMPATIBILITY_MACROS
#include "cache.h"
+#include "lockfile.h"
#include "cache-tree.h"
#include "refs.h"
#include "dir.h"
diff --git a/refs.c b/refs.c
index e40c47e..1d73f1d 100644
--- a/refs.c
+++ b/refs.c
@@ -1,4 +1,5 @@
#include "cache.h"
+#include "lockfile.h"
#include "refs.h"
#include "object.h"
#include "tag.h"
diff --git a/rerere.c b/rerere.c
index 20b18ad..1b0555f 100644
--- a/rerere.c
+++ b/rerere.c
@@ -1,4 +1,5 @@
#include "cache.h"
+#include "lockfile.h"
#include "string-list.h"
#include "rerere.h"
#include "xdiff-interface.h"
diff --git a/sequencer.c b/sequencer.c
index 5e8a207..1b9a35e 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -1,4 +1,5 @@
#include "cache.h"
+#include "lockfile.h"
#include "sequencer.h"
#include "dir.h"
#include "object.h"
diff --git a/sha1_file.c b/sha1_file.c
index c08c0cb..46ff273 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -8,6 +8,7 @@
*/
#include "cache.h"
#include "string-list.h"
+#include "lockfile.h"
#include "delta.h"
#include "pack.h"
#include "blob.h"
diff --git a/shallow.c b/shallow.c
index 4919baf..bd7569e 100644
--- a/shallow.c
+++ b/shallow.c
@@ -1,4 +1,5 @@
#include "cache.h"
+#include "lockfile.h"
#include "commit.h"
#include "tag.h"
#include "pkt-line.h"
diff --git a/test-scrap-cache-tree.c b/test-scrap-cache-tree.c
index 9ebcbca..6efee31 100644
--- a/test-scrap-cache-tree.c
+++ b/test-scrap-cache-tree.c
@@ -1,4 +1,5 @@
#include "cache.h"
+#include "lockfile.h"
#include "tree.h"
#include "cache-tree.h"