Re: [PATCH v3 2/3] grep: enable threading with -p and -W using lazy attribute lookup

[Junio C Hamano <gitster@pobox.com>]

Johannes Sixt <j.sixt@viscovery.net> writes:

> This is the first time we use pthread_mutex_t in a header file. We need at
> least the following squashed in. An alternative would be to include
> "thread-utils.h", but thread-utils is really more about implementation
> helpers functions, not about types,...

builtin/grep.c already uses thread-utils.h since 5b594f4 (Threaded grep,
2010-01-25), so does builtin/pack-objects.c since 833e3df (pack-objects:
Add runtime detection of online CPU's, 2008-02-22), so it may be simpler
to do so in grep.h instead.

diff --git a/builtin/grep.c b/builtin/grep.c
index bc23c3c..6474eed 100644
--- a/builtin/grep.c
+++ b/builtin/grep.c
@@ -17,7 +17,6 @@
 #include "grep.h"
 #include "quote.h"
 #include "dir.h"
-#include "thread-utils.h"
 
 static char const * const grep_usage[] = {
 	"git grep [options] [-e] <pattern> [<rev>...] [[--] <path>...]",
diff --git a/grep.h b/grep.h
index 15d227c..dd4c65e 100644
--- a/grep.h
+++ b/grep.h
@@ -133,8 +133,11 @@ extern struct grep_opt *grep_opt_dup(const struct grep_opt *opt);
 extern int grep_threads_ok(const struct grep_opt *opt);
 
 #ifndef NO_PTHREADS
-/* Mutex used around access to the attributes machinery if
- * opt->use_threads.  Must be initialized/destroyed by callers! */
+#include "thread-utils.h"
+/*
+ * Mutex used around access to the attributes machinery if
+ * opt->use_threads.  Must be initialized/destroyed by callers!
+ */
 extern pthread_mutex_t grep_attr_mutex;
 #endif