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Diffstat (limited to 'builtin/grep.c')
-rw-r--r--builtin/grep.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/builtin/grep.c b/builtin/grep.c
index 7d0779f6c..88b0c8013 100644
--- a/builtin/grep.c
+++ b/builtin/grep.c
@@ -77,10 +77,11 @@ static pthread_mutex_t grep_mutex;
/* Used to serialize calls to read_sha1_file. */
static pthread_mutex_t read_sha1_mutex;
-#define grep_lock() pthread_mutex_lock(&grep_mutex)
-#define grep_unlock() pthread_mutex_unlock(&grep_mutex)
-#define read_sha1_lock() pthread_mutex_lock(&read_sha1_mutex)
-#define read_sha1_unlock() pthread_mutex_unlock(&read_sha1_mutex)
+#define WHEN_THREADED(x) do { if (use_threads) (x); } while (0)
+#define grep_lock() WHEN_THREADED(pthread_mutex_lock(&grep_mutex))
+#define grep_unlock() WHEN_THREADED(pthread_mutex_unlock(&grep_mutex))
+#define read_sha1_lock() WHEN_THREADED(pthread_mutex_lock(&read_sha1_mutex))
+#define read_sha1_unlock() WHEN_THREADED(pthread_mutex_unlock(&read_sha1_mutex))
/* Signalled when a new work_item is added to todo. */
static pthread_cond_t cond_add;