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