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main-loop: drop rfds/wfds/xfds for good 

Now that all *_fill() and *_poll() functions use GPollFD we no longer
need rfds/wfds/xfds or pollfds_from_select()/pollfds_to_select().

>From now on everything uses GPollFD.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Message-id: 1361356113-11049-8-git-send-email-stefanha@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Stefan Hajnoczi 2013-02-20 11:28:30 +01:00 committed by Anthony Liguori
parent a3e4b4a809
commit 9cbaacf999
1 changed files with 2 additions and 75 deletions
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77
main-loop.c
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@ -143,66 +143,8 @@ int qemu_init_main_loop(void)
return 0;
}
static fd_set rfds, wfds, xfds;
static int nfds;
static int max_priority;
/* Load rfds/wfds/xfds into gpollfds. Will be removed a few commits later. */
static void gpollfds_from_select(void)
{
int fd;
for (fd = 0; fd <= nfds; fd++) {
int events = 0;
if (FD_ISSET(fd, &rfds)) {
events |= G_IO_IN | G_IO_HUP | G_IO_ERR;
}
if (FD_ISSET(fd, &wfds)) {
events |= G_IO_OUT | G_IO_ERR;
}
if (FD_ISSET(fd, &xfds)) {
events |= G_IO_PRI;
}
if (events) {
GPollFD pfd = {
.fd = fd,
.events = events,
};
g_array_append_val(gpollfds, pfd);
}
}
}
/* Store gpollfds revents into rfds/wfds/xfds. Will be removed a few commits
* later.
*/
static void gpollfds_to_select(int ret)
{
int i;
FD_ZERO(&rfds);
FD_ZERO(&wfds);
FD_ZERO(&xfds);
if (ret <= 0) {
return;
}
for (i = 0; i < gpollfds->len; i++) {
int fd = g_array_index(gpollfds, GPollFD, i).fd;
int revents = g_array_index(gpollfds, GPollFD, i).revents;
if (revents & (G_IO_IN | G_IO_HUP | G_IO_ERR)) {
FD_SET(fd, &rfds);
}
if (revents & (G_IO_OUT | G_IO_ERR)) {
FD_SET(fd, &wfds);
}
if (revents & G_IO_PRI) {
FD_SET(fd, &xfds);
}
}
}
#ifndef _WIN32
static int glib_pollfds_idx;
static int glib_n_poll_fds;
@ -251,15 +193,8 @@ static int os_host_main_loop_wait(uint32_t timeout)
qemu_mutex_unlock_iothread();
}
/* We'll eventually drop fd_set completely. But for now we still have
* *_fill() and *_poll() functions that use rfds/wfds/xfds.
*/
gpollfds_from_select();
ret = g_poll((GPollFD *)gpollfds->data, gpollfds->len, timeout);
gpollfds_to_select(ret);
if (timeout > 0) {
qemu_mutex_lock_iothread();
}
@ -417,6 +352,8 @@ static int os_host_main_loop_wait(uint32_t timeout)
WaitObjects *w = &wait_objects;
gint poll_timeout;
static struct timeval tv0;
fd_set rfds, wfds, xfds;
int nfds;
/* XXX: need to suppress polling by better using win32 events */
ret = 0;
@ -463,10 +400,6 @@ static int os_host_main_loop_wait(uint32_t timeout)
* improve socket latency.
*/
/* This back-and-forth between GPollFDs and select(2) is temporary. We'll
* drop it in a couple of patches, I promise :).
*/
gpollfds_from_select();
FD_ZERO(&rfds);
FD_ZERO(&wfds);
FD_ZERO(&xfds);
@ -480,7 +413,6 @@ static int os_host_main_loop_wait(uint32_t timeout)
pollfds_poll(gpollfds, nfds, &rfds, &wfds, &xfds);
}
}
gpollfds_to_select(select_ret);
return select_ret || g_poll_ret;
}
@ -498,11 +430,6 @@ int main_loop_wait(int nonblocking)
/* poll any events */
g_array_set_size(gpollfds, 0); /* reset for new iteration */
/* XXX: separate device handlers from system ones */
nfds = -1;
FD_ZERO(&rfds);
FD_ZERO(&wfds);
FD_ZERO(&xfds);
#ifdef CONFIG_SLIRP
slirp_update_timeout(&timeout);
slirp_pollfds_fill(gpollfds);