diff options
Diffstat (limited to 'web/server/h2o/libh2o/lib/common/socket/evloop/kqueue.c.h')
-rw-r--r-- | web/server/h2o/libh2o/lib/common/socket/evloop/kqueue.c.h | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/web/server/h2o/libh2o/lib/common/socket/evloop/kqueue.c.h b/web/server/h2o/libh2o/lib/common/socket/evloop/kqueue.c.h new file mode 100644 index 000000000..21288ed7c --- /dev/null +++ b/web/server/h2o/libh2o/lib/common/socket/evloop/kqueue.c.h @@ -0,0 +1,186 @@ +/* + * Copyright (c) 2014 DeNA Co., Ltd. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ +#include <assert.h> +#include <stdio.h> +#include <sys/types.h> +#include <sys/event.h> +#include <sys/time.h> + +#if 0 +#define DEBUG_LOG(...) fprintf(stderr, __VA_ARGS__) +#else +#define DEBUG_LOG(...) +#endif + +struct st_h2o_socket_loop_kqueue_t { + h2o_evloop_t super; + int kq; +}; + +static void ev_set(struct kevent *ev, int fd, int filter, int flags, struct st_h2o_evloop_socket_t *sock) +{ +#ifdef __NetBSD__ + EV_SET(ev, fd, filter, flags, 0, 0, (intptr_t)sock); +#else + EV_SET(ev, fd, filter, flags, 0, 0, sock); +#endif +} + +static int collect_status(struct st_h2o_socket_loop_kqueue_t *loop, struct kevent *changelist, int changelist_capacity) +{ + int change_index = 0; + +#define SET_AND_UPDATE(filter, flags) \ + do { \ + ev_set(changelist + change_index++, sock->fd, filter, flags, sock); \ + if (change_index == changelist_capacity) { \ + int ret; \ + while ((ret = kevent(loop->kq, changelist, change_index, NULL, 0, NULL)) != 0 && errno == EINTR) \ + ; \ + if (ret == -1) \ + return -1; \ + change_index = 0; \ + } \ + } while (0) + + while (loop->super._statechanged.head != NULL) { + /* detach the top */ + struct st_h2o_evloop_socket_t *sock = loop->super._statechanged.head; + loop->super._statechanged.head = sock->_next_statechanged; + sock->_next_statechanged = sock; + /* update the state */ + if ((sock->_flags & H2O_SOCKET_FLAG_IS_DISPOSED) != 0) { + free(sock); + } else { + if (h2o_socket_is_reading(&sock->super)) { + if ((sock->_flags & H2O_SOCKET_FLAG_IS_POLLED_FOR_READ) == 0) { + sock->_flags |= H2O_SOCKET_FLAG_IS_POLLED_FOR_READ; + SET_AND_UPDATE(EVFILT_READ, EV_ADD); + } + } else { + if ((sock->_flags & H2O_SOCKET_FLAG_IS_POLLED_FOR_READ) != 0) { + sock->_flags &= ~H2O_SOCKET_FLAG_IS_POLLED_FOR_READ; + SET_AND_UPDATE(EVFILT_READ, EV_DELETE); + } + } + if (h2o_socket_is_writing(&sock->super)) { + if ((sock->_flags & H2O_SOCKET_FLAG_IS_POLLED_FOR_WRITE) == 0) { + sock->_flags |= H2O_SOCKET_FLAG_IS_POLLED_FOR_WRITE; + SET_AND_UPDATE(EVFILT_WRITE, EV_ADD); + } + } else { + if ((sock->_flags & H2O_SOCKET_FLAG_IS_POLLED_FOR_WRITE) != 0) { + sock->_flags &= ~H2O_SOCKET_FLAG_IS_POLLED_FOR_WRITE; + SET_AND_UPDATE(EVFILT_WRITE, EV_DELETE); + } + } + } + } + loop->super._statechanged.tail_ref = &loop->super._statechanged.head; + + return change_index; + +#undef SET_AND_UPDATE +} + +int evloop_do_proceed(h2o_evloop_t *_loop, int32_t max_wait) +{ + struct st_h2o_socket_loop_kqueue_t *loop = (struct st_h2o_socket_loop_kqueue_t *)_loop; + struct kevent changelist[64], events[128]; + int nchanges, nevents, i; + struct timespec ts; + + /* collect (and update) status */ + if ((nchanges = collect_status(loop, changelist, sizeof(changelist) / sizeof(changelist[0]))) == -1) + return -1; + + /* poll */ + max_wait = adjust_max_wait(&loop->super, max_wait); + ts.tv_sec = max_wait / 1000; + ts.tv_nsec = max_wait % 1000 * 1000 * 1000; + nevents = kevent(loop->kq, changelist, nchanges, events, sizeof(events) / sizeof(events[0]), &ts); + + update_now(&loop->super); + if (nevents == -1) + return -1; + + if (nevents != 0) + h2o_sliding_counter_start(&loop->super.exec_time_counter, loop->super._now); + + /* update readable flags, perform writes */ + for (i = 0; i != nevents; ++i) { + struct st_h2o_evloop_socket_t *sock = (void *)events[i].udata; + assert(sock->fd == events[i].ident); + switch (events[i].filter) { + case EVFILT_READ: + if (sock->_flags != H2O_SOCKET_FLAG_IS_DISPOSED) { + sock->_flags |= H2O_SOCKET_FLAG_IS_READ_READY; + link_to_pending(sock); + } + break; + case EVFILT_WRITE: + if (sock->_flags != H2O_SOCKET_FLAG_IS_DISPOSED) { + write_pending(sock); + } + break; + default: + break; /* ??? */ + } + } + + return 0; +} + +static void evloop_do_on_socket_create(struct st_h2o_evloop_socket_t *sock) +{ +} + +static void evloop_do_on_socket_close(struct st_h2o_evloop_socket_t *sock) +{ +} + +static void evloop_do_on_socket_export(struct st_h2o_evloop_socket_t *sock) +{ + struct st_h2o_socket_loop_kqueue_t *loop = (void *)sock->loop; + struct kevent changelist[2]; + int change_index = 0, ret; + + if ((sock->_flags & H2O_SOCKET_FLAG_IS_POLLED_FOR_READ) != 0) + ev_set(changelist + change_index++, sock->fd, EVFILT_READ, EV_DELETE, 0); + if ((sock->_flags & H2O_SOCKET_FLAG_IS_POLLED_FOR_WRITE) != 0) + ev_set(changelist + change_index++, sock->fd, EVFILT_WRITE, EV_DELETE, 0); + if (change_index == 0) + return; + while ((ret = kevent(loop->kq, changelist, change_index, NULL, 0, NULL)) != 0 && errno == EINTR) + ; + if (ret == -1) + fprintf(stderr, "kevent returned error %d (fd=%d)", errno, sock->fd); +} + +h2o_evloop_t *h2o_evloop_create(void) +{ + struct st_h2o_socket_loop_kqueue_t *loop = (struct st_h2o_socket_loop_kqueue_t *)create_evloop(sizeof(*loop)); + + loop->kq = kqueue(); + + return &loop->super; +} |