From: Jeff King <peff@peff.net>
Date: Tue, 10 Jun 2014 21:42:51 +0000 (-0400)
Subject: commit-slab: provide a static initializer
X-Git-Tag: v2.0.2~4^2~3
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=80cdaba569600154d91819d2e252f6b7dd9cff73;p=git

commit-slab: provide a static initializer

Callers currently must use init_foo_slab() at runtime before
accessing a slab. For global slabs, it's much nicer if we
can initialize them in BSS, so that each user does not have
to add code to check-and-initialize.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---

diff --git a/commit-slab.h b/commit-slab.h
index cc114b53b0..375c9c751a 100644
--- a/commit-slab.h
+++ b/commit-slab.h
@@ -117,4 +117,16 @@ static int stat_ ##slabname## realloc
  * catch because GCC silently parses it by default.
  */
 
+/*
+ * Statically initialize a commit slab named "var". Note that this
+ * evaluates "stride" multiple times! Example:
+ *
+ *   struct indegree indegrees = COMMIT_SLAB_INIT(1, indegrees);
+ *
+ */
+#define COMMIT_SLAB_INIT(stride, var) { \
+	COMMIT_SLAB_SIZE / sizeof(**((var).slab)) / (stride), \
+	(stride), 0, NULL \
+}
+
 #endif /* COMMIT_SLAB_H */