diff options
| -rw-r--r-- | builtin/grep.c | 13 | ||||
| -rw-r--r-- | grep.c | 73 | ||||
| -rw-r--r-- | grep.h | 10 |
3 files changed, 63 insertions, 33 deletions
diff --git a/builtin/grep.c b/builtin/grep.c index 988ea1d332..6474eed19e 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>...]", @@ -256,6 +255,7 @@ static void start_threads(struct grep_opt *opt) pthread_mutex_init(&grep_mutex, NULL); pthread_mutex_init(&read_sha1_mutex, NULL); + pthread_mutex_init(&grep_attr_mutex, NULL); pthread_cond_init(&cond_add, NULL); pthread_cond_init(&cond_write, NULL); pthread_cond_init(&cond_result, NULL); @@ -303,6 +303,7 @@ static int wait_all(void) pthread_mutex_destroy(&grep_mutex); pthread_mutex_destroy(&read_sha1_mutex); + pthread_mutex_destroy(&grep_attr_mutex); pthread_cond_destroy(&cond_add); pthread_cond_destroy(&cond_write); pthread_cond_destroy(&cond_result); @@ -1002,17 +1003,21 @@ int cmd_grep(int argc, const char **argv, const char *prefix) opt.regflags |= REG_ICASE; #ifndef NO_PTHREADS - if (online_cpus() == 1 || !grep_threads_ok(&opt)) + if (online_cpus() == 1) use_threads = 0; +#else + use_threads = 0; +#endif + + opt.use_threads = use_threads; +#ifndef NO_PTHREADS if (use_threads) { if (opt.pre_context || opt.post_context || opt.file_break || opt.funcbody) skip_first_line = 1; start_threads(&opt); } -#else - use_threads = 0; #endif compile_grep_patterns(&opt); @@ -806,10 +806,46 @@ static void show_line(struct grep_opt *opt, char *bol, char *eol, opt->output(opt, "\n", 1); } -static int match_funcname(struct grep_opt *opt, char *bol, char *eol) +#ifndef NO_PTHREADS +/* + * This lock protects access to the gitattributes machinery, which is + * not thread-safe. + */ +pthread_mutex_t grep_attr_mutex; + +static inline void grep_attr_lock(struct grep_opt *opt) +{ + if (opt->use_threads) + pthread_mutex_lock(&grep_attr_mutex); +} + +static inline void grep_attr_unlock(struct grep_opt *opt) +{ + if (opt->use_threads) + pthread_mutex_unlock(&grep_attr_mutex); +} +#else +#define grep_attr_lock(opt) +#define grep_attr_unlock(opt) +#endif + +static int match_funcname(struct grep_opt *opt, const char *name, char *bol, char *eol) { xdemitconf_t *xecfg = opt->priv; - if (xecfg && xecfg->find_func) { + if (xecfg && !xecfg->find_func) { + struct userdiff_driver *drv; + grep_attr_lock(opt); + drv = userdiff_find_by_path(name); + grep_attr_unlock(opt); + if (drv && drv->funcname.pattern) { + const struct userdiff_funcname *pe = &drv->funcname; + xdiff_set_find_func(xecfg, pe->pattern, pe->cflags); + } else { + xecfg = opt->priv = NULL; + } + } + + if (xecfg) { char buf[1]; return xecfg->find_func(bol, eol - bol, buf, 1, xecfg->find_func_priv) >= 0; @@ -835,7 +871,7 @@ static void show_funcname_line(struct grep_opt *opt, const char *name, if (lno <= opt->last_shown) break; - if (match_funcname(opt, bol, eol)) { + if (match_funcname(opt, name, bol, eol)) { show_line(opt, bol, eol, name, lno, '='); break; } @@ -848,7 +884,7 @@ static void show_pre_context(struct grep_opt *opt, const char *name, char *buf, unsigned cur = lno, from = 1, funcname_lno = 0; int funcname_needed = !!opt->funcname; - if (opt->funcbody && !match_funcname(opt, bol, end)) + if (opt->funcbody && !match_funcname(opt, name, bol, end)) funcname_needed = 2; if (opt->pre_context < lno) @@ -864,7 +900,7 @@ static void show_pre_context(struct grep_opt *opt, const char *name, char *buf, while (bol > buf && bol[-1] != '\n') bol--; cur--; - if (funcname_needed && match_funcname(opt, bol, eol)) { + if (funcname_needed && match_funcname(opt, name, bol, eol)) { funcname_lno = cur; funcname_needed = 0; } @@ -942,19 +978,6 @@ static int look_ahead(struct grep_opt *opt, return 0; } -int grep_threads_ok(const struct grep_opt *opt) -{ - /* If this condition is true, then we may use the attribute - * machinery in grep_buffer_1. The attribute code is not - * thread safe, so we disable the use of threads. - */ - if ((opt->funcname || opt->funcbody) - && !opt->unmatch_name_only && !opt->status_only && !opt->name_only) - return 0; - - return 1; -} - static void std_output(struct grep_opt *opt, const void *buf, size_t size) { fwrite(buf, size, 1, stdout); @@ -1008,16 +1031,8 @@ static int grep_buffer_1(struct grep_opt *opt, const char *name, } memset(&xecfg, 0, sizeof(xecfg)); - if ((opt->funcname || opt->funcbody) - && !opt->unmatch_name_only && !opt->status_only && - !opt->name_only && !binary_match_only && !collect_hits) { - struct userdiff_driver *drv = userdiff_find_by_path(name); - if (drv && drv->funcname.pattern) { - const struct userdiff_funcname *pe = &drv->funcname; - xdiff_set_find_func(&xecfg, pe->pattern, pe->cflags); - opt->priv = &xecfg; - } - } + opt->priv = &xecfg; + try_lookahead = should_lookahead(opt); while (left) { @@ -1093,7 +1108,7 @@ static int grep_buffer_1(struct grep_opt *opt, const char *name, show_function = 1; goto next_line; } - if (show_function && match_funcname(opt, bol, eol)) + if (show_function && match_funcname(opt, name, bol, eol)) show_function = 0; if (show_function || (last_hit && lno <= last_hit + opt->post_context)) { @@ -8,6 +8,7 @@ typedef int pcre; typedef int pcre_extra; #endif #include "kwset.h" +#include "thread-utils.h" enum grep_pat_token { GREP_PATTERN, @@ -115,6 +116,7 @@ struct grep_opt { int show_hunk_mark; int file_break; int heading; + int use_threads; void *priv; void (*output)(struct grep_opt *opt, const void *data, size_t size); @@ -131,4 +133,12 @@ extern int grep_buffer(struct grep_opt *opt, const char *name, char *buf, unsign 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! + */ +extern pthread_mutex_t grep_attr_mutex; +#endif + #endif |