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#if defined(LIBEV_EMBED)
#include "ev.c"
#undef LIBEV_EMBED
#define LIBEV_EMBED 1
#define gevent_ev_loop_origflags(loop) ((loop)->origflags)
#define gevent_ev_loop_sig_pending(loop) ((loop))->sig_pending
#define gevent_ev_loop_backend_fd(loop) ((loop))->backend_fd
#define gevent_ev_loop_activecnt(loop) ((loop))->activecnt
#if EV_USE_SIGNALFD
#define gevent_ev_loop_sigfd(loop) ((loop))->sigfd
#else
#define gevent_ev_loop_sigfd(loop) -1
#endif /* !EV_USE_SIGNALFD */
#else /* !LIBEV_EMBED */
#include "ev.h"
#define gevent_ev_loop_origflags(loop) -1
#define gevent_ev_loop_sig_pending(loop) -1
#define gevent_ev_loop_backend_fd(loop) -1
#define gevent_ev_loop_activecnt(loop) -1
#define gevent_ev_loop_sigfd(loop) -1
#define LIBEV_EMBED 0
#define EV_USE_FLOOR -1
#define EV_USE_CLOCK_SYSCALL -1
#define EV_USE_REALTIME -1
#define EV_USE_MONOTONIC -1
#define EV_USE_NANOSLEEP -1
#define EV_USE_INOTIFY -1
#define EV_USE_SIGNALFD -1
#define EV_USE_EVENTFD -1
#define EV_USE_4HEAP -1
#ifndef _WIN32
#include <signal.h>
#endif /* !_WIN32 */
#endif /* LIBEV_EMBED */
#ifndef _WIN32
static struct sigaction libev_sigchld;
/*
* Track the state of whether we have installed
* the libev sigchld handler specifically.
* If it's non-zero, libev_sigchld will be valid and set to the action
* that libev needs to do.
* If it's 1, we need to install libev_sigchld to make libev
* child handlers work (on request).
*/
static int sigchld_state = 0;
static struct ev_loop* gevent_ev_default_loop(unsigned int flags)
{
struct ev_loop* result;
struct sigaction tmp;
if (sigchld_state)
return ev_default_loop(flags);
// Request the old SIGCHLD handler
sigaction(SIGCHLD, NULL, &tmp);
// Get the loop, which will install a SIGCHLD handler
result = ev_default_loop(flags);
// XXX what if SIGCHLD received there?
// Now restore the previous SIGCHLD handler
sigaction(SIGCHLD, &tmp, &libev_sigchld);
sigchld_state = 1;
return result;
}
static void gevent_install_sigchld_handler(void) {
if (sigchld_state == 1) {
sigaction(SIGCHLD, &libev_sigchld, NULL);
sigchld_state = 2;
}
}
static void gevent_reset_sigchld_handler(void) {
// We could have any state at this point, depending on
// whether the default loop has been used. If it has,
// then always be in state 1 ("need to install)
if (sigchld_state) {
sigchld_state = 1;
}
}
#else /* !_WIN32 */
#define gevent_ev_default_loop ev_default_loop
static void gevent_install_sigchld_handler(void) { }
static void gevent_reset_sigchld_handler(void) { }
// Fake child functions that we can link to.
static void ev_child_start(struct ev_loop* loop, ev_child* w) {};
static void ev_child_stop(struct ev_loop* loop, ev_child* w) {};
#endif /* _WIN32 */
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