From: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
If index-helper puts 'W' before pid in $GIT_DIR/index-helper.pid, then
git will sleep for a while, expecting to be waken up by SIGUSR1 when
index-helper has done shm preparation, or after the timeout.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
Signed-off-by: David Turner <dturner@xxxxxxxxxxxxxxxx>
---
read-cache.c | 36 ++++++++++++++++++++++++++++++++++--
1 file changed, 34 insertions(+), 2 deletions(-)
diff --git a/read-cache.c b/read-cache.c
index 85ef15b..57c5df9 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -1613,14 +1613,46 @@ static void do_poke(struct strbuf *sb, int refresh_cache)
PostMessage(hwnd, refresh_cache ? WM_USER : WM_USER + 1, 0, 0);
}
#else
+
+static volatile int done_sleeping;
+
+static void mark_done_sleeping(int sig)
+{
+ done_sleeping = 1;
+}
+
+/*
+ * Send a message to the index-helper to let it know that we're going
+ * to read the index. If refresh_cache is true, then the index-helper
+ * should re-read the index; otherwise, it should just stay alive.
+ *
+ * If the index-helper supports watchman, it will refresh the index
+ * before it hands it over. Wait up to one second for a response
+ * indicating that the index has been successfully refreshed.
+ *
+ */
static void do_poke(struct strbuf *sb, int refresh_cache)
{
- char *start = sb->buf;
+ int wait = sb->buf[0] == 'W';
+ char *start = wait ? sb->buf + 1 : sb->buf;
char *end = NULL;
pid_t pid = strtoul(start, &end, 10);
+ int ret;
+ int count = 0;
+
+ done_sleeping = 0;
if (!end || end != sb->buf + sb->len)
return;
- kill(pid, refresh_cache ? SIGHUP : SIGUSR1);
+ if (!refresh_cache && wait)
+ signal(SIGHUP, mark_done_sleeping);
+ ret = kill(pid, refresh_cache ? SIGHUP : SIGUSR1);
+ if (!refresh_cache && wait) {
+ if (!ret)
+ while (!done_sleeping && count++ < 1000)
+ sleep_millisec(1);
+
+ sigaction(SIGHUP, NULL, NULL);
+ }
}
#endif
--
2.4.2.767.g62658d5-twtrsrc
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