This triggers a lot of build warnings on my mac, basically in every
file that uses refs.h:
CC archive.o
In file included from archive.c:2:
./refs.h:635:16: warning: redefinition of typedef
'ref_transaction_free_fn' is a C11 feature [-Wtypedef-redefinition]
typedef void (*ref_transaction_free_fn)(struct ref_transaction *transaction);
^
./refs.h:613:16: note: previous definition is here
typedef void (*ref_transaction_free_fn)(struct ref_transaction *transaction);
^
1 warning generated.
On Mon, Sep 28, 2015 at 3:02 PM, David Turner <dturner@xxxxxxxxxxxxxxxx> wrote:
> Alternate ref backends might need different data for transactions. Make
> struct ref_transaction an empty struct, and let backends define their
> own structs which extend it.
>
> Signed-off-by: David Turner <dturner@xxxxxxxxxxxxxxxx>
> ---
> refs-be-files.c | 24 +++++++++++++++++-------
> refs.h | 8 ++++++--
> 2 files changed, 23 insertions(+), 9 deletions(-)
>
> diff --git a/refs-be-files.c b/refs-be-files.c
> index 0a76c8e..3f2d194 100644
> --- a/refs-be-files.c
> +++ b/refs-be-files.c
> @@ -3218,7 +3218,8 @@ enum ref_transaction_state {
> * consist of checks and updates to multiple references, carried out
> * as atomically as possible. This structure is opaque to callers.
> */
> -struct ref_transaction {
> +struct files_ref_transaction {
> + struct ref_transaction base;
> struct ref_update **updates;
> size_t alloc;
> size_t nr;
> @@ -3229,13 +3230,16 @@ static struct ref_transaction *files_transaction_begin(struct strbuf *err)
> {
> assert(err);
>
> - return xcalloc(1, sizeof(struct ref_transaction));
> + return xcalloc(1, sizeof(struct files_ref_transaction));
> }
>
> -static void files_transaction_free(struct ref_transaction *transaction)
> +static void files_transaction_free(struct ref_transaction *trans)
> {
> int i;
>
> + struct files_ref_transaction *transaction =
> + (struct files_ref_transaction *)trans;
> +
> if (!transaction)
> return;
>
> @@ -3247,7 +3251,7 @@ static void files_transaction_free(struct ref_transaction *transaction)
> free(transaction);
> }
>
> -static struct ref_update *add_update(struct ref_transaction *transaction,
> +static struct ref_update *add_update(struct files_ref_transaction *transaction,
> const char *refname)
> {
> size_t len = strlen(refname) + 1;
> @@ -3259,7 +3263,7 @@ static struct ref_update *add_update(struct ref_transaction *transaction,
> return update;
> }
>
> -static int files_transaction_update(struct ref_transaction *transaction,
> +static int files_transaction_update(struct ref_transaction *trans,
> const char *refname,
> const unsigned char *new_sha1,
> const unsigned char *old_sha1,
> @@ -3267,6 +3271,8 @@ static int files_transaction_update(struct ref_transaction *transaction,
> struct strbuf *err)
> {
> struct ref_update *update;
> + struct files_ref_transaction *transaction =
> + (struct files_ref_transaction *)trans;
>
> assert(err);
>
> @@ -3350,10 +3356,12 @@ static int ref_update_reject_duplicates(struct string_list *refnames,
> return 0;
> }
>
> -static int files_transaction_commit(struct ref_transaction *transaction,
> +static int files_transaction_commit(struct ref_transaction *trans,
> struct strbuf *err)
> {
> int ret = 0, i;
> + struct files_ref_transaction *transaction =
> + (struct files_ref_transaction *)trans;
> int n = transaction->nr;
> struct ref_update **updates = transaction->updates;
> struct string_list refs_to_delete = STRING_LIST_INIT_NODUP;
> @@ -3517,10 +3525,12 @@ static int ref_present(const char *refname,
> return string_list_has_string(affected_refnames, refname);
> }
>
> -static int files_initial_transaction_commit(struct ref_transaction *transaction,
> +static int files_initial_transaction_commit(struct ref_transaction *trans,
> struct strbuf *err)
> {
> int ret = 0, i;
> + struct files_ref_transaction *transaction =
> + (struct files_ref_transaction *)trans;
> int n = transaction->nr;
> struct ref_update **updates = transaction->updates;
> struct string_list affected_refnames = STRING_LIST_INIT_NODUP;
> diff --git a/refs.h b/refs.h
> index 64dba64..02001ef 100644
> --- a/refs.h
> +++ b/refs.h
> @@ -130,7 +130,7 @@ extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
> *
> * Calling sequence
> * ----------------
> - * - Allocate and initialize a `struct ref_transaction` by calling
> + * - Allocate and initialize a transaction by calling
> * `ref_transaction_begin()`.
> *
> * - List intended ref updates by calling functions like
> @@ -156,7 +156,10 @@ extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
> * The message is appended to err without first clearing err.
> * err will not be '\n' terminated.
> */
> -struct ref_transaction;
> +
> +struct ref_transaction {
> + /* ref backends should extend this */
> +};
>
> /*
> * Bit values set in the flags argument passed to each_ref_fn():
> @@ -629,6 +632,7 @@ typedef int (*reflog_expire_fn)(const char *refname, const unsigned char *sha1,
> void *policy_cb_data);
>
> /* resolution functions */
> +typedef void (*ref_transaction_free_fn)(struct ref_transaction *transaction);
> typedef const char *(*resolve_ref_unsafe_fn)(const char *ref,
> int resolve_flags,
> unsigned char *sha1, int *flags);
> --
> 2.4.2.644.g97b850b-twtrsrc
>
> --
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