From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Turner Subject: [PATCH 18/43] refs-be-files.c: add a backend method structure with transaction functions Date: Wed, 2 Sep 2015 21:54:48 -0400 Message-ID: <1441245313-11907-19-git-send-email-dturner@twopensource.com> References: <1441245313-11907-1-git-send-email-dturner@twopensource.com> Cc: Ronnie Sahlberg , David Turner To: git@vger.kernel.org, mhagger@alum.mit.edu X-From: git-owner@vger.kernel.org Thu Sep 03 03:55:58 2015 Return-path: Envelope-to: gcvg-git-2@plane.gmane.org Received: from vger.kernel.org ([209.132.180.67]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1ZXJkm-0006Bo-Cc for gcvg-git-2@plane.gmane.org; Thu, 03 Sep 2015 03:55:52 +0200 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932227AbbICBzp (ORCPT ); Wed, 2 Sep 2015 21:55:45 -0400 Received: from mail-qg0-f41.google.com ([209.85.192.41]:33513 "EHLO mail-qg0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932163AbbICBzo (ORCPT ); Wed, 2 Sep 2015 21:55:44 -0400 Received: by qgev79 with SMTP id v79so18594681qge.0 for ; Wed, 02 Sep 2015 18:55:43 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=CXiPaPTgTBpYI/95+1P8iPb/eXFCjCSD408Y+M/ePCg=; b=QXZ4m8fV6YOZbSUL/WLivQWt99m8Dh91IE/8ma44cixEOh2iCSYUmkiHaWJmUGQ6Cs dt6oGhnfsZXuqRC1fvou86jXgyuRsW8a9amxEgylnvcvNW7lutA7ZLCbGnobq8fzrf2F KMQQqxAdnLKxFLtQP6OVtIv6Nt2pcxXOwsh1P6L02+/lIsW4QgxwRtoAVzYCwR4gTa/D VlZHRkljVlaUipRDzQFtjm5kAhNPQTQkJxN66Y7/SSuQPPa2A14Csuv4fDHFSolbACuo Ma2kq4yfm40kwuSjjsls4E95FZqBf/iM1Dec3g2V8eaUD5nd2vIebP8ZcfiqdpdG4U+D a9Ag== X-Gm-Message-State: ALoCoQl0SBu+TxTIUBU7bMZ7ulrHdDC9NJ0D/0MYaK+zGsVzcYsIT3Az8efbP7YZCfzMEUD5ffvB X-Received: by 10.140.93.53 with SMTP id c50mr2297796qge.59.1441245342918; Wed, 02 Sep 2015 18:55:42 -0700 (PDT) Received: from ubuntu.jfk4.office.twttr.net ([192.133.79.145]) by smtp.gmail.com with ESMTPSA id 95sm11108155qgt.12.2015.09.02.18.55.41 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 02 Sep 2015 18:55:42 -0700 (PDT) X-Mailer: git-send-email 2.0.4.315.gad8727a-twtrsrc In-Reply-To: <1441245313-11907-1-git-send-email-dturner@twopensource.com> Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Archived-At: From: Ronnie Sahlberg Add a ref structure for backend methods. Start by adding method pointers for the transaction functions. Add a function set_refs_backend to switch between backends. The files based backend is the default. Signed-off-by: Ronnie Sahlberg Signed-off-by: David Turner --- refs-be-files.c | 62 ++++++++++++++++++++++++++++------------------- refs.c | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ refs.h | 36 +++++++++++++++++++++++++++ 3 files changed, 148 insertions(+), 25 deletions(-) diff --git a/refs-be-files.c b/refs-be-files.c index 21b38cf..e86f1d9 100644 --- a/refs-be-files.c +++ b/refs-be-files.c @@ -3307,14 +3307,14 @@ struct ref_transaction { enum ref_transaction_state state; }; -struct ref_transaction *ref_transaction_begin(struct strbuf *err) +static struct ref_transaction *files_transaction_begin(struct strbuf *err) { assert(err); return xcalloc(1, sizeof(struct ref_transaction)); } -void ref_transaction_free(struct ref_transaction *transaction) +static void files_transaction_free(struct ref_transaction *transaction) { int i; @@ -3341,12 +3341,12 @@ static struct ref_update *add_update(struct ref_transaction *transaction, return update; } -int ref_transaction_update(struct ref_transaction *transaction, - const char *refname, - const unsigned char *new_sha1, - const unsigned char *old_sha1, - unsigned int flags, const char *msg, - struct strbuf *err) +static int files_transaction_update(struct ref_transaction *transaction, + const char *refname, + const unsigned char *new_sha1, + const unsigned char *old_sha1, + unsigned int flags, const char *msg, + struct strbuf *err) { struct ref_update *update; @@ -3377,11 +3377,11 @@ int ref_transaction_update(struct ref_transaction *transaction, return 0; } -int ref_transaction_create(struct ref_transaction *transaction, - const char *refname, - const unsigned char *new_sha1, - unsigned int flags, const char *msg, - struct strbuf *err) +static int files_transaction_create(struct ref_transaction *transaction, + const char *refname, + const unsigned char *new_sha1, + unsigned int flags, const char *msg, + struct strbuf *err) { if (!new_sha1 || is_null_sha1(new_sha1)) die("BUG: create called without valid new_sha1"); @@ -3389,11 +3389,11 @@ int ref_transaction_create(struct ref_transaction *transaction, null_sha1, flags, msg, err); } -int ref_transaction_delete(struct ref_transaction *transaction, - const char *refname, - const unsigned char *old_sha1, - unsigned int flags, const char *msg, - struct strbuf *err) +static int files_transaction_delete(struct ref_transaction *transaction, + const char *refname, + const unsigned char *old_sha1, + unsigned int flags, const char *msg, + struct strbuf *err) { if (old_sha1 && is_null_sha1(old_sha1)) die("BUG: delete called with old_sha1 set to zeros"); @@ -3402,11 +3402,11 @@ int ref_transaction_delete(struct ref_transaction *transaction, flags, msg, err); } -int ref_transaction_verify(struct ref_transaction *transaction, - const char *refname, - const unsigned char *old_sha1, - unsigned int flags, - struct strbuf *err) +int files_transaction_verify(struct ref_transaction *transaction, + const char *refname, + const unsigned char *old_sha1, + unsigned int flags, + struct strbuf *err) { if (!old_sha1) die("BUG: verify called with old_sha1 set to NULL"); @@ -3432,8 +3432,8 @@ static int ref_update_reject_duplicates(struct string_list *refnames, return 0; } -int ref_transaction_commit(struct ref_transaction *transaction, - struct strbuf *err) +static int files_transaction_commit(struct ref_transaction *transaction, + struct strbuf *err) { int ret = 0, i; int n = transaction->nr; @@ -3819,3 +3819,15 @@ int reflog_expire(const char *refname, const unsigned char *sha1, unlock_ref(lock); return -1; } + +struct ref_be refs_be_files = { + NULL, + "files", + files_transaction_begin, + files_transaction_update, + files_transaction_create, + files_transaction_delete, + files_transaction_verify, + files_transaction_commit, + files_transaction_free, +}; diff --git a/refs.c b/refs.c index 0f4e19a..63cd001 100644 --- a/refs.c +++ b/refs.c @@ -4,6 +4,29 @@ #include "cache.h" #include "refs.h" #include "lockfile.h" +/* + * We always have a files backend and it is the default. + */ +struct ref_be *the_refs_backend = &refs_be_files; +/* + * List of all available backends + */ +struct ref_be *refs_backends = &refs_be_files; + +/* + * This function is used to switch to an alternate backend. + */ +int set_refs_backend(const char *name) +{ + struct ref_be *be; + + for (be = refs_backends; be; be = be->next) + if (!strcmp(be->name, name)) { + the_refs_backend = be; + return 0; + } + return 1; +} static int is_per_worktree_ref(const char *refname) { @@ -877,3 +900,55 @@ int head_ref_namespaced(each_ref_fn fn, void *cb_data) return ret; } + + +/* backend functions */ +struct ref_transaction *ref_transaction_begin(struct strbuf *err) +{ + return the_refs_backend->transaction_begin(err); +} + + +int ref_transaction_update(struct ref_transaction *transaction, + const char *refname, const unsigned char *new_sha1, + const unsigned char *old_sha1, unsigned int flags, + const char *msg, struct strbuf *err) +{ + return the_refs_backend->transaction_update(transaction, + refname, new_sha1, old_sha1, flags, msg, err); +} + +int ref_transaction_create(struct ref_transaction *transaction, + const char *refname, const unsigned char *new_sha1, + unsigned int flags, const char *msg, struct strbuf *err) +{ + return the_refs_backend->transaction_create(transaction, + refname, new_sha1, flags, msg, err); +} +int ref_transaction_delete(struct ref_transaction *transaction, + const char *refname, const unsigned char *old_sha1, + unsigned int flags, const char *msg, + struct strbuf *err) +{ + return the_refs_backend->transaction_delete(transaction, + refname, old_sha1, flags, msg, err); +} + +int ref_transaction_verify(struct ref_transaction *transaction, + const char *refname, const unsigned char *old_sha1, + unsigned int flags, + struct strbuf *err) +{ + return the_refs_backend->transaction_verify(transaction, + refname, old_sha1, flags, err); +} + +int ref_transaction_commit(struct ref_transaction *transaction, struct strbuf *err) +{ + return the_refs_backend->transaction_commit(transaction, err); +} + +void ref_transaction_free(struct ref_transaction *transaction) +{ + return the_refs_backend->transaction_free(transaction); +} diff --git a/refs.h b/refs.h index e0c6ea1..ba52c8e 100644 --- a/refs.h +++ b/refs.h @@ -530,4 +530,40 @@ extern int reflog_expire(const char *refname, const unsigned char *sha1, reflog_expiry_cleanup_fn cleanup_fn, void *policy_cb_data); +/* refs backends */ +typedef struct ref_transaction *(*ref_transaction_begin_fn)(struct strbuf *err); +typedef int (*ref_transaction_update_fn)(struct ref_transaction *transaction, + const char *refname, const unsigned char *new_sha1, + const unsigned char *old_sha1, unsigned int flags, + const char *msg, struct strbuf *err); +typedef int (*ref_transaction_create_fn)( + struct ref_transaction *transaction, + const char *refname, const unsigned char *new_sha1, + unsigned int flags, const char *msg, struct strbuf *err); +typedef int (*ref_transaction_delete_fn)(struct ref_transaction *transaction, + const char *refname, const unsigned char *old_sha1, + unsigned int flags, const char *msg, struct strbuf *err); +typedef int (*ref_transaction_verify_fn)(struct ref_transaction *transaction, + const char *refname, const unsigned char *old_sha1, + unsigned int flags, struct strbuf *err); +typedef int (*ref_transaction_commit_fn)(struct ref_transaction *transaction, + struct strbuf *err); +typedef void (*ref_transaction_free_fn)(struct ref_transaction *transaction); + +struct ref_be { + struct ref_be *next; + const char *name; + ref_transaction_begin_fn transaction_begin; + ref_transaction_update_fn transaction_update; + ref_transaction_create_fn transaction_create; + ref_transaction_delete_fn transaction_delete; + ref_transaction_verify_fn transaction_verify; + ref_transaction_commit_fn transaction_commit; + ref_transaction_free_fn transaction_free; +}; + + +extern struct ref_be refs_be_files; +int set_refs_backend(const char *name); + #endif /* REFS_H */ -- 2.0.4.315.gad8727a-twtrsrc