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Rather than running status-left, status-right and window title #() with popen

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immediately every redraw, queue them up and run them in the background,
starting each once every status-interval. The actual status line uses the
output from the last run.

This brings several advantages:

- tmux itself may be called from inside #() without causing the server to hang;
- likewise, sleep or similar doesn't cause the server to block;
- commands aren't run excessively often when redrawing;
- commands shared by status-left and status-right, or used multiple times, will
  only be run once.

run-shell and if-shell still use system()/popen() but will be changed over to
use this too later.
This commit is contained in:
Nicholas Marriott
2009-10-10 15:03:01 +00:00
parent 4658c063d5
commit 6bca92db4d
9 changed files with 364 additions and 46 deletions
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9
buffer-poll.c
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@ -29,9 +29,9 @@ buffer_poll(struct pollfd *pfd, struct buffer *in, struct buffer *out)
{
ssize_t n;
if (pfd->revents & (POLLERR|POLLNVAL|POLLHUP))
if (pfd->revents & (POLLERR|POLLNVAL))
return (-1);
if (pfd->revents & POLLIN) {
if (in != NULL && pfd->revents & POLLIN) {
buffer_ensure(in, BUFSIZ);
n = read(pfd->fd, BUFFER_IN(in), BUFFER_FREE(in));
if (n == 0)
@ -41,8 +41,9 @@ buffer_poll(struct pollfd *pfd, struct buffer *in, struct buffer *out)
return (-1);
} else
buffer_add(in, n);
}
if (BUFFER_USED(out) > 0 && pfd->revents & POLLOUT) {
} else if (pfd->revents & POLLHUP)
return (-1);
if (out != NULL && BUFFER_USED(out) > 0 && pfd->revents & POLLOUT) {
n = write(pfd->fd, BUFFER_OUT(out), BUFFER_USED(out));
if (n == -1) {
if (errno != EINTR && errno != EAGAIN)