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/* glib.c, liboop, copyright 1999 Dan Egnor
This is free software; you can redistribute it and/or modify it under the
terms of the GNU Lesser General Public License, version 2.1 or later.
See the file COPYING for details. */
#include "glib.h"
#include "oop-glib.h"
#include "oop.h"
#include <assert.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include <errno.h>
#ifdef HAVE_POLL_H
#include <poll.h>
#endif
static int use_count = 0;
static oop_source_sys *sys;
static oop_adapter_select *sel;
static fd_set read_set,write_set,except_set;
static int count;
static void *ret = NULL;
#if GLIB_MAJOR_VERSION >= 2
static GPollFunc save_poll_func = NULL;
#endif
static void *on_select(
oop_adapter_select *s,int num,fd_set *r,fd_set *w,fd_set *x,
struct timeval now,void *unused)
{
read_set = *r;
write_set = *w;
except_set = *x;
count = num;
return &use_count;
}
static gint on_poll(GPollFD *array,guint num,gint timeout) {
struct timeval tv;
int i;
FD_ZERO(&read_set);
FD_ZERO(&write_set);
FD_ZERO(&except_set);
count = 0;
for (i = 0; i < num; ++i) {
if (array[i].events & G_IO_IN)
FD_SET(array[i].fd,&read_set);
if (array[i].events & G_IO_OUT)
FD_SET(array[i].fd,&write_set);
if (array[i].events & G_IO_PRI)
FD_SET(array[i].fd,&except_set);
/* {G_IO_,POLL}{ERR,HUP,INVAL} don't correspond to anything
in select(2), and aren't `normal' events anyway. */
if (array[i].fd >= count)
count = 1 + array[i].fd;
}
tv.tv_sec = timeout / 1000;
tv.tv_usec = timeout % 1000;
oop_select_set(sel,count,&read_set,&write_set,&except_set,
timeout < 0 ? NULL : &tv);
ret = oop_sys_run(sys);
if (&use_count != ret) {
/* I really wish I could: g_main_quit(glib_loop); */
return -1;
/* but they even ignore the error return... sigh. */
}
for (i = 0; i < num; ++i) {
if (FD_ISSET(array[i].fd,&read_set))
array[i].revents |= G_IO_IN;
if (FD_ISSET(array[i].fd,&write_set))
array[i].revents |= G_IO_OUT;
if (FD_ISSET(array[i].fd,&except_set))
array[i].revents |= G_IO_PRI;
}
return count;
}
oop_source *oop_glib_new(void) {
if (use_count++) return oop_sys_source(sys);
sys = oop_sys_new();
sel = oop_select_new(oop_sys_source(sys),on_select,NULL);
#if GLIB_MAJOR_VERSION >= 2
save_poll_func = g_main_context_get_poll_func(g_main_context_default());
g_main_context_set_poll_func(g_main_context_default(), on_poll);
#else
g_main_set_poll_func(on_poll);
#endif
return oop_sys_source(sys);
}
void *oop_glib_return(void) {
if (&use_count == ret) return NULL;
return ret;
}
#ifdef HAVE_POLL_H
static gint real_poll(GPollFD *array,guint num,gint timeout) {
assert(sizeof(GPollFD) == sizeof(struct pollfd));
return poll((struct pollfd *) array,num,timeout);
}
#endif
void oop_glib_delete(void) {
assert(use_count > 0 && "oop_glib_delete() called too much");
if (0 != --use_count) return;
#if GLIB_MAJOR_VERSION >= 2
g_main_context_set_poll_func(g_main_context_default(), save_poll_func);
#elif defined(HAVE_POLL_H)
g_main_set_poll_func(real_poll);
#else
return;
#endif
oop_select_delete(sel);
oop_sys_delete(sys);
}
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