From: Andre Noll <maan@systemlinux.org>
Date: Sat, 4 Jan 2014 05:38:23 +0000 (+0000)
Subject: gui: Execute stat command in status_post_select().
X-Git-Tag: v0.5.3~12^2~11
X-Git-Url: http://git.tue.mpg.de/?a=commitdiff_plain;h=405a66cac091943206ea466455638b876942fe1d;p=paraslash.git

gui: Execute stat command in status_post_select().

pre_select methods should only deal with fd sets and select timeouts,
so the part of status_pre_select() which restarts the status command
belongs to status_post_select().

Unfortunately, after this change both status_pre_select() and
status_post_select() need to know when to restart the stat command.
Therefore we had to add a new global variable next_exec.

The patch also moves status_pre_select() up so that the two functions
are close to each other.
---

diff --git a/gui.c b/gui.c
index 40e93b0c..894fc2f8 100644
--- a/gui.c
+++ b/gui.c
@@ -644,15 +644,50 @@ static void clear_all_items(void)
 	}
 }
 
+static struct timeval next_exec;
+
+static void status_pre_select(fd_set *rfds, int *max_fileno, struct timeval *tv)
+{
+	struct timeval atm, diff;
+
+	if (stat_pipe >= 0)
+		return para_fd_set(stat_pipe, rfds, max_fileno);
+	gettimeofday(&atm, NULL);
+	if (tv_diff(&next_exec, &atm, &diff) > 0) {
+		*tv = diff;
+		return;
+	}
+	tv->tv_sec = tv->tv_usec = 0; /* min delay */
+}
+
 static void status_post_select(fd_set *rfds)
 {
 	static char *buf;
 	static int bufsize, loaded;
-	int ret, ret2;
 	size_t sz;
+	pid_t pid;
+	int ret, ret2;
 
-	if (stat_pipe < 0)
+	if (stat_pipe < 0) {
+		struct timeval atm;
+		int fds[3] = {0, 1, 0};
+		/* Avoid busy loop */
+		gettimeofday(&atm, NULL);
+		if (tv_diff(&next_exec, &atm, NULL) > 0)
+			return;
+		next_exec.tv_sec = atm.tv_sec + 2;
+		ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
+		if (ret < 0)
+			return;
+		ret = mark_fd_nonblocking(fds[1]);
+		if (ret < 0) {
+			close(fds[1]);
+			return;
+		}
+		stat_pipe = fds[1];
 		return;
+	}
+
 	if (loaded >= bufsize) {
 		if (bufsize > 1000 * 1000) {
 			loaded = 0;
@@ -954,35 +989,6 @@ static void signal_post_select(fd_set *rfds)
 	}
 }
 
-static void status_pre_select(fd_set *rfds, int *max_fileno, struct timeval *tv)
-{
-	static struct timeval next_exec, atm, diff;
-	int ret, fds[3] = {0, 1, 0};
-	pid_t pid;
-
-	if (stat_pipe >= 0)
-		goto success;
-	/* Avoid busy loop */
-	gettimeofday(&atm, NULL);
-	if (tv_diff(&next_exec, &atm, &diff) > 0) {
-		if (tv_diff(&diff, tv, NULL) < 0)
-			*tv = diff;
-		return;
-	}
-	next_exec.tv_sec = atm.tv_sec + 2;
-	ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
-	if (ret < 0)
-		return;
-	ret = mark_fd_nonblocking(fds[1]);
-	if (ret < 0) {
-		close(fds[1]);
-		return;
-	}
-	stat_pipe = fds[1];
-success:
-	para_fd_set(stat_pipe, rfds, max_fileno);
-}
-
 #define COMMAND_BUF_SIZE 32768
 
 static enum cmd_status cmd_status(void)