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Diffstat (limited to 'builtin/grep.c')
-rw-r--r--builtin/grep.c60
1 files changed, 41 insertions, 19 deletions
diff --git a/builtin/grep.c b/builtin/grep.c
index 801ce60..8c516a9 100644
--- a/builtin/grep.c
+++ b/builtin/grep.c
@@ -24,11 +24,11 @@ static char const * const grep_usage[] = {
NULL
};
-static int use_threads = 1;
+#define GREP_NUM_THREADS_DEFAULT 8
+static int num_threads;
#ifndef NO_PTHREADS
-#define THREADS 8
-static pthread_t threads[THREADS];
+static pthread_t *threads;
/* We use one producer thread and THREADS consumer
* threads. The producer adds struct work_items to 'todo' and the
@@ -63,13 +63,13 @@ static pthread_mutex_t grep_mutex;
static inline void grep_lock(void)
{
- if (use_threads)
+ if (num_threads)
pthread_mutex_lock(&grep_mutex);
}
static inline void grep_unlock(void)
{
- if (use_threads)
+ if (num_threads)
pthread_mutex_unlock(&grep_mutex);
}
@@ -206,7 +206,8 @@ static void start_threads(struct grep_opt *opt)
strbuf_init(&todo[i].out, 0);
}
- for (i = 0; i < ARRAY_SIZE(threads); i++) {
+ threads = xcalloc(num_threads, sizeof(*threads));
+ for (i = 0; i < num_threads; i++) {
int err;
struct grep_opt *o = grep_opt_dup(opt);
o->output = strbuf_out;
@@ -238,12 +239,14 @@ static int wait_all(void)
pthread_cond_broadcast(&cond_add);
grep_unlock();
- for (i = 0; i < ARRAY_SIZE(threads); i++) {
+ for (i = 0; i < num_threads; i++) {
void *h;
pthread_join(threads[i], &h);
hit |= (int) (intptr_t) h;
}
+ free(threads);
+
pthread_mutex_destroy(&grep_mutex);
pthread_mutex_destroy(&grep_read_mutex);
pthread_mutex_destroy(&grep_attr_mutex);
@@ -267,6 +270,14 @@ static int grep_cmd_config(const char *var, const char *value, void *cb)
int st = grep_config(var, value, cb);
if (git_color_default_config(var, value, cb) < 0)
st = -1;
+
+ if (!strcmp(var, "grep.threads")) {
+ num_threads = git_config_int(var, value);
+ if (num_threads < 0)
+ die(_("invalid number of threads specified (%d) for %s"),
+ num_threads, var);
+ }
+
return st;
}
@@ -294,7 +305,7 @@ static int grep_sha1(struct grep_opt *opt, const unsigned char *sha1,
}
#ifndef NO_PTHREADS
- if (use_threads) {
+ if (num_threads) {
add_work(opt, GREP_SOURCE_SHA1, pathbuf.buf, path, sha1);
strbuf_release(&pathbuf);
return 0;
@@ -323,7 +334,7 @@ static int grep_file(struct grep_opt *opt, const char *filename)
strbuf_addstr(&buf, filename);
#ifndef NO_PTHREADS
- if (use_threads) {
+ if (num_threads) {
add_work(opt, GREP_SOURCE_FILE, buf.buf, filename, filename);
strbuf_release(&buf);
return 0;
@@ -375,7 +386,7 @@ static int grep_cache(struct grep_opt *opt, const struct pathspec *pathspec, int
for (nr = 0; nr < active_nr; nr++) {
const struct cache_entry *ce = active_cache[nr];
- if (!S_ISREG(ce->ce_mode))
+ if (!S_ISREG(ce->ce_mode) || ce_intent_to_add(ce))
continue;
if (!ce_path_match(ce, pathspec, NULL))
continue;
@@ -697,6 +708,8 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
N_("show <n> context lines before matches")),
OPT_INTEGER('A', "after-context", &opt.post_context,
N_("show <n> context lines after matches")),
+ OPT_INTEGER(0, "threads", &num_threads,
+ N_("use <n> worker threads")),
OPT_NUMBER_CALLBACK(&opt, N_("shortcut for -C NUM"),
context_callback),
OPT_BOOL('p', "show-function", &opt.funcname,
@@ -755,9 +768,15 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
PARSE_OPT_STOP_AT_NON_OPTION);
grep_commit_pattern_type(pattern_type_arg, &opt);
- if (use_index && !startup_info->have_repository)
- /* die the same way as if we did it at the beginning */
- setup_git_directory();
+ if (use_index && !startup_info->have_repository) {
+ int fallback = 0;
+ git_config_get_bool("grep.fallbacktonoindex", &fallback);
+ if (fallback)
+ use_index = 0;
+ else
+ /* die the same way as if we did it at the beginning */
+ setup_git_directory();
+ }
/*
* skip a -- separator; we know it cannot be
@@ -786,7 +805,6 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
opt.output_priv = &path_list;
opt.output = append_path;
string_list_append(&path_list, show_in_pager);
- use_threads = 0;
}
if (!opt.pattern_list)
@@ -817,14 +835,18 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
}
#ifndef NO_PTHREADS
- if (list.nr || cached || online_cpus() == 1)
- use_threads = 0;
+ if (list.nr || cached || show_in_pager)
+ num_threads = 0;
+ else if (num_threads == 0)
+ num_threads = GREP_NUM_THREADS_DEFAULT;
+ else if (num_threads < 0)
+ die(_("invalid number of threads specified (%d)"), num_threads);
#else
- use_threads = 0;
+ num_threads = 0;
#endif
#ifndef NO_PTHREADS
- if (use_threads) {
+ if (num_threads) {
if (!(opt.name_only || opt.unmatch_name_only || opt.count)
&& (opt.pre_context || opt.post_context ||
opt.file_break || opt.funcbody))
@@ -894,7 +916,7 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
hit = grep_objects(&opt, &pathspec, &list);
}
- if (use_threads)
+ if (num_threads)
hit |= wait_all();
if (hit && show_in_pager)
run_pager(&opt, prefix);