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authorMartin Ågren <martin.agren@gmail.com>2018-05-09 20:55:39 (GMT)
committerJunio C Hamano <gitster@pobox.com>2018-05-10 05:55:40 (GMT)
commit0fa5a2ed8d9f6d987f1ea479fe8ea56a26b89303 (patch)
tree19f1b29e8f3972f281423aa35c9d5711829f1e02 /builtin
parentb227586831ed393e1d60629bfedcef01be4b9c22 (diff)
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lock_file: move static locks into functions
Placing `struct lock_file`s on the stack used to be a bad idea, because the temp- and lockfile-machinery would keep a pointer into the struct. But after 076aa2cbd (tempfile: auto-allocate tempfiles on heap, 2017-09-05), we can safely have lockfiles on the stack. (This applies even if a user returns early, leaving a locked lock behind.) Each of these `struct lock_file`s is used from within a single function. Move them into the respective functions to make the scope clearer and drop the staticness. For good measure, I have inspected these sites and come to believe that they always release the lock, with the possible exception of bailing out using `die()` or `exit()` or by returning from a `cmd_foo()`. As pointed out by Jeff King, it would be bad if someone held on to a `struct lock_file *` for some reason. After some grepping, I agree with his findings: no-one appears to be doing that. After this commit, the remaining occurrences of "static struct lock_file" are locks that are used from within different functions. That is, they need to remain static. (Short of more intrusive changes like passing around pointers to non-static locks.) Signed-off-by: Martin Ågren <martin.agren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'builtin')
-rw-r--r--builtin/add.c3
-rw-r--r--builtin/mv.c2
-rw-r--r--builtin/read-tree.c3
-rw-r--r--builtin/rm.c3
4 files changed, 4 insertions, 7 deletions
diff --git a/builtin/add.c b/builtin/add.c
index 9ef7fb0..80152bc 100644
--- a/builtin/add.c
+++ b/builtin/add.c
@@ -265,8 +265,6 @@ static int edit_patch(int argc, const char **argv, const char *prefix)
return 0;
}
-static struct lock_file lock_file;
-
static const char ignore_error[] =
N_("The following paths are ignored by one of your .gitignore files:\n");
@@ -393,6 +391,7 @@ int cmd_add(int argc, const char **argv, const char *prefix)
int add_new_files;
int require_pathspec;
char *seen = NULL;
+ struct lock_file lock_file = LOCK_INIT;
git_config(add_config, NULL);
diff --git a/builtin/mv.c b/builtin/mv.c
index 6d141f7..b469240 100644
--- a/builtin/mv.c
+++ b/builtin/mv.c
@@ -72,7 +72,6 @@ static const char *add_slash(const char *path)
return path;
}
-static struct lock_file lock_file;
#define SUBMODULE_WITH_GITDIR ((const char *)1)
static void prepare_move_submodule(const char *src, int first,
@@ -131,6 +130,7 @@ int cmd_mv(int argc, const char **argv, const char *prefix)
enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
struct stat st;
struct string_list src_for_dst = STRING_LIST_INIT_NODUP;
+ struct lock_file lock_file = LOCK_INIT;
git_config(git_default_config, NULL);
diff --git a/builtin/read-tree.c b/builtin/read-tree.c
index bf87a27..ebc43eb 100644
--- a/builtin/read-tree.c
+++ b/builtin/read-tree.c
@@ -107,8 +107,6 @@ static int git_read_tree_config(const char *var, const char *value, void *cb)
return git_default_config(var, value, cb);
}
-static struct lock_file lock_file;
-
int cmd_read_tree(int argc, const char **argv, const char *unused_prefix)
{
int i, stage = 0;
@@ -116,6 +114,7 @@ int cmd_read_tree(int argc, const char **argv, const char *unused_prefix)
struct tree_desc t[MAX_UNPACK_TREES];
struct unpack_trees_options opts;
int prefix_set = 0;
+ struct lock_file lock_file = LOCK_INIT;
const struct option read_tree_options[] = {
{ OPTION_CALLBACK, 0, "index-output", NULL, N_("file"),
N_("write resulting index to <file>"),
diff --git a/builtin/rm.c b/builtin/rm.c
index 4447bb4..0fcb952 100644
--- a/builtin/rm.c
+++ b/builtin/rm.c
@@ -233,8 +233,6 @@ static int check_local_mod(struct object_id *head, int index_only)
return errs;
}
-static struct lock_file lock_file;
-
static int show_only = 0, force = 0, index_only = 0, recursive = 0, quiet = 0;
static int ignore_unmatch = 0;
@@ -251,6 +249,7 @@ static struct option builtin_rm_options[] = {
int cmd_rm(int argc, const char **argv, const char *prefix)
{
+ struct lock_file lock_file = LOCK_INIT;
int i;
struct pathspec pathspec;
char *seen;