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main: Split off events loop handling into a separate file

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To make it easier to use as an example.
This commit is contained in:
Bastien Nocera
2018-05-25 15:52:10 +02:00
parent 4234902671
commit 8e0c030f62
4 changed files with 225 additions and 168 deletions
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169
src/main.c
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@ -30,6 +30,7 @@
#include <gmodule.h>
#include "fprintd.h"
#include "loop.h"
#include "storage.h"
#include "file_storage.h"
@ -37,174 +38,6 @@ extern DBusGConnection *fprintd_dbus_conn;
static gboolean no_timeout = FALSE;
static gboolean g_fatal_warnings = FALSE;
struct fdsource {
GSource source;
GSList *pollfds;
};
static gboolean source_prepare(GSource *source, gint *timeout)
{
int r;
struct timeval tv;
r = fp_get_next_timeout(&tv);
if (r == 0) {
*timeout = -1;
return FALSE;
}
if (!timerisset(&tv))
return TRUE;
*timeout = (tv.tv_sec * 1000) + (tv.tv_usec / 1000);
return FALSE;
}
static gboolean source_check(GSource *source)
{
struct fdsource *_fdsource = (struct fdsource *) source;
GSList *l;
struct timeval tv;
int r;
if (!_fdsource->pollfds)
return FALSE;
for (l = _fdsource->pollfds; l != NULL; l = l->next) {
GPollFD *pollfd = l->data;
if (pollfd->revents)
return TRUE;
}
r = fp_get_next_timeout(&tv);
if (r == 1 && !timerisset(&tv))
return TRUE;
return FALSE;
}
static gboolean source_dispatch(GSource *source, GSourceFunc callback,
gpointer data)
{
struct timeval zerotimeout = {
.tv_sec = 0,
.tv_usec = 0,
};
/* FIXME error handling */
fp_handle_events_timeout(&zerotimeout);
/* FIXME whats the return value used for? */
return TRUE;
}
static void source_finalize(GSource *source)
{
struct fdsource *_fdsource = (struct fdsource *) source;
GSList *l;
if (!_fdsource->pollfds)
return;
for (l = _fdsource->pollfds; l != NULL; l = l->next) {
GPollFD *pollfd = l->data;
g_source_remove_poll((GSource *) _fdsource, pollfd);
g_slice_free(GPollFD, pollfd);
_fdsource->pollfds = g_slist_delete_link(_fdsource->pollfds, l);
}
g_slist_free(_fdsource->pollfds);
}
static GSourceFuncs sourcefuncs = {
.prepare = source_prepare,
.check = source_check,
.dispatch = source_dispatch,
.finalize = source_finalize,
};
static struct fdsource *fdsource = NULL;
static void pollfd_add(int fd, short events)
{
GPollFD *pollfd;
pollfd = g_slice_new(GPollFD);
pollfd->fd = fd;
pollfd->events = 0;
pollfd->revents = 0;
if (events & POLLIN)
pollfd->events |= G_IO_IN;
if (events & POLLOUT)
pollfd->events |= G_IO_OUT;
fdsource->pollfds = g_slist_prepend(fdsource->pollfds, pollfd);
g_source_add_poll((GSource *) fdsource, pollfd);
}
static void pollfd_added_cb(int fd, short events)
{
g_debug("now monitoring fd %d", fd);
pollfd_add(fd, events);
}
static void pollfd_removed_cb(int fd)
{
GSList *l;
g_debug("no longer monitoring fd %d", fd);
if (!fdsource->pollfds) {
g_debug("cannot remove from list as list is empty?");
return;
}
for (l = fdsource->pollfds; l != NULL; l = l->next) {
GPollFD *pollfd = l->data;
if (pollfd->fd != fd)
continue;
g_source_remove_poll((GSource *) fdsource, pollfd);
g_slice_free(GPollFD, pollfd);
fdsource->pollfds = g_slist_delete_link(fdsource->pollfds, l);
return;
}
g_error("couldn't find fd %d in list\n", fd);
}
static int setup_pollfds(void)
{
size_t numfds;
size_t i;
struct fp_pollfd *fpfds;
GSource *gsource;
gsource = g_source_new(&sourcefuncs, sizeof(struct fdsource));
fdsource = (struct fdsource *) gsource;
fdsource->pollfds = NULL;
numfds = fp_get_pollfds(&fpfds);
if (numfds < 0) {
if (fpfds)
free(fpfds);
return (int) numfds;
} else if (numfds > 0) {
for (i = 0; i < numfds; i++) {
struct fp_pollfd *fpfd = &fpfds[i];
pollfd_add(fpfd->fd, fpfd->events);
}
}
free(fpfds);
fp_set_pollfd_notifiers(pollfd_added_cb, pollfd_removed_cb);
g_source_attach(gsource, NULL);
return 0;
}
static void
set_storage_file (void)
{