[PATCH 2/4] Unify code paths of threaded greps

[Jonathan Nieder <jrnieder@gmail.com>]

From: Johannes Schindelin <johannes.schindelin@gmx.de>

There were three awfully similar code paths ending the threaded grep. It
is better to avoid duplicated code, though.

This change might very well prevent a race, where the grep patterns were
free()d before waiting that all threads finished.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
---
 builtin/grep.c |   22 +++++-----------------
 1 files changed, 5 insertions(+), 17 deletions(-)

diff --git a/builtin/grep.c b/builtin/grep.c
index 5b8879f..2111212 100644
--- a/builtin/grep.c
+++ b/builtin/grep.c
@@ -590,7 +590,6 @@ static int grep_cache(struct grep_opt *opt, const char **paths, int cached)
 		if (hit && opt->status_only)
 			break;
 	}
-	free_grep_patterns(opt);
 	return hit;
 }
 
@@ -708,7 +707,6 @@ static int grep_directory(struct grep_opt *opt, const char **paths)
 		if (hit && opt->status_only)
 			break;
 	}
-	free_grep_patterns(opt);
 	return hit;
 }
 
@@ -1019,32 +1017,22 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
 	}
 
 	if (!use_index) {
-		int hit;
 		if (cached)
 			die("--cached cannot be used with --no-index.");
 		if (list.nr)
 			die("--no-index cannot be used with revs.");
 		hit = grep_directory(&opt, paths);
-		if (use_threads)
-			hit |= wait_all();
-		return !hit;
-	}
-
-	if (!list.nr) {
-		int hit;
+	} else if (!list.nr) {
 		if (!cached)
 			setup_work_tree();
 
 		hit = grep_cache(&opt, paths, cached);
-		if (use_threads)
-			hit |= wait_all();
-		return !hit;
+	} else {
+		if (cached)
+			die("both --cached and trees are given.");
+		hit = grep_objects(&opt, paths, &list);
 	}
 
-	if (cached)
-		die("both --cached and trees are given.");
-	hit = grep_objects(&opt, paths, &list);
-
 	if (use_threads)
 		hit |= wait_all();
 	free_grep_patterns(&opt);
-- 
1.7.1