1 files changed, 203 insertions, 0 deletions
diff --git a/web/server/h2o/libh2o/lib/common/socket/evloop/epoll.c.h b/web/server/h2o/libh2o/lib/common/socket/evloop/epoll.c.h
new file mode 100644
index 00000000..247dac89
--- /dev/null
+++ b/web/server/h2o/libh2o/lib/common/socket/evloop/epoll.c.h
@@ -0,0 +1,203 @@
+/*
+ * 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 <limits.h>
+#include <stdio.h>
+#include <sys/epoll.h>
+
+#if 0
+#define DEBUG_LOG(...) fprintf(stderr, __VA_ARGS__)
+#else
+#define DEBUG_LOG(...)
+#endif
+
+struct st_h2o_evloop_epoll_t {
+    h2o_evloop_t super;
+    int ep;
+};
+
+static int update_status(struct st_h2o_evloop_epoll_t *loop)
+{
+    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 {
+            int changed = 0, op, ret;
+            struct epoll_event ev;
+            ev.events = 0;
+            if (h2o_socket_is_reading(&sock->super)) {
+                ev.events |= EPOLLIN;
+                if ((sock->_flags & H2O_SOCKET_FLAG_IS_POLLED_FOR_READ) == 0) {
+                    sock->_flags |= H2O_SOCKET_FLAG_IS_POLLED_FOR_READ;
+                    changed = 1;
+                }
+            } else {
+                if ((sock->_flags & H2O_SOCKET_FLAG_IS_POLLED_FOR_READ) != 0) {
+                    sock->_flags &= ~H2O_SOCKET_FLAG_IS_POLLED_FOR_READ;
+                    changed = 1;
+                }
+            }
+            if (h2o_socket_is_writing(&sock->super)) {
+                ev.events |= EPOLLOUT;
+                if ((sock->_flags & H2O_SOCKET_FLAG_IS_POLLED_FOR_WRITE) == 0) {
+                    sock->_flags |= H2O_SOCKET_FLAG_IS_POLLED_FOR_WRITE;
+                    changed = 1;
+                }
+            } else {
+                if ((sock->_flags & H2O_SOCKET_FLAG_IS_POLLED_FOR_WRITE) != 0) {
+                    sock->_flags &= ~H2O_SOCKET_FLAG_IS_POLLED_FOR_WRITE;
+                    changed = 1;
+                }
+            }
+            if (changed) {
+                if ((sock->_flags & H2O_SOCKET_FLAG__EPOLL_IS_REGISTERED) != 0) {
+                    if (ev.events != 0)
+                        op = EPOLL_CTL_MOD;
+                    else
+                        op = EPOLL_CTL_DEL;
+                } else {
+                    assert(ev.events != 0);
+                    op = EPOLL_CTL_ADD;
+                }
+                ev.data.ptr = sock;
+                while ((ret = epoll_ctl(loop->ep, op, sock->fd, &ev)) != 0 && errno == EINTR)
+                    ;
+                if (ret != 0)
+                    return -1;
+                if (op == EPOLL_CTL_DEL)
+                    sock->_flags &= ~H2O_SOCKET_FLAG__EPOLL_IS_REGISTERED;
+                else
+                    sock->_flags |= H2O_SOCKET_FLAG__EPOLL_IS_REGISTERED;
+            }
+        }
+    }
+    loop->super._statechanged.tail_ref = &loop->super._statechanged.head;
+
+    return 0;
+}
+
+int evloop_do_proceed(h2o_evloop_t *_loop, int32_t max_wait)
+{
+    struct st_h2o_evloop_epoll_t *loop = (struct st_h2o_evloop_epoll_t *)_loop;
+    struct epoll_event events[256];
+    int nevents, i;
+
+    /* collect (and update) status */
+    if (update_status(loop) != 0)
+        return -1;
+
+    /* poll */
+    max_wait = adjust_max_wait(&loop->super, max_wait);
+    nevents = epoll_wait(loop->ep, events, sizeof(events) / sizeof(events[0]), max_wait);
+    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 = events[i].data.ptr;
+        int notified = 0;
+        if ((events[i].events & (EPOLLIN | EPOLLHUP | EPOLLERR)) != 0) {
+            if ((sock->_flags & H2O_SOCKET_FLAG_IS_POLLED_FOR_READ) != 0) {
+                sock->_flags |= H2O_SOCKET_FLAG_IS_READ_READY;
+                link_to_pending(sock);
+                notified = 1;
+            }
+        }
+        if ((events[i].events & (EPOLLOUT | EPOLLHUP | EPOLLERR)) != 0) {
+            if ((sock->_flags & H2O_SOCKET_FLAG_IS_POLLED_FOR_WRITE) != 0) {
+                write_pending(sock);
+                notified = 1;
+            }
+        }
+        if (!notified) {
+            static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
+            static time_t last_reported = 0;
+            time_t now = time(NULL);
+            pthread_mutex_lock(&lock);
+            if (last_reported + 60 < now) {
+                last_reported = now;
+                fprintf(stderr, "ignoring epoll event (fd:%d,event:%x)\n", sock->fd, (int)events[i].events);
+            }
+            pthread_mutex_unlock(&lock);
+        }
+    }
+
+    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)
+{
+    struct st_h2o_evloop_epoll_t *loop = (void *)sock->loop;
+    int ret;
+
+    if (sock->fd == -1)
+        return;
+    if ((sock->_flags & H2O_SOCKET_FLAG__EPOLL_IS_REGISTERED) == 0)
+        return;
+    while ((ret = epoll_ctl(loop->ep, EPOLL_CTL_DEL, sock->fd, NULL)) != 0 && errno == EINTR)
+        ;
+    if (ret != 0)
+        fprintf(stderr, "socket_close: epoll(DEL) returned error %d (fd=%d)\n", errno, sock->fd);
+}
+
+static void evloop_do_on_socket_export(struct st_h2o_evloop_socket_t *sock)
+{
+    struct st_h2o_evloop_epoll_t *loop = (void *)sock->loop;
+    int ret;
+
+    if ((sock->_flags & H2O_SOCKET_FLAG__EPOLL_IS_REGISTERED) == 0)
+        return;
+    while ((ret = epoll_ctl(loop->ep, EPOLL_CTL_DEL, sock->fd, NULL)) != 0 && errno == EINTR)
+        ;
+    if (ret != 0)
+        fprintf(stderr, "socket_export: epoll(DEL) returned error %d (fd=%d)\n", errno, sock->fd);
+}
+
+h2o_evloop_t *h2o_evloop_create(void)
+{
+    struct st_h2o_evloop_epoll_t *loop = (struct st_h2o_evloop_epoll_t *)create_evloop(sizeof(*loop));
+
+    pthread_mutex_lock(&cloexec_mutex);
+    loop->ep = epoll_create(10);
+    while (fcntl(loop->ep, F_SETFD, FD_CLOEXEC) == -1) {
+        if (errno != EAGAIN) {
+            fprintf(stderr, "h2o_evloop_create: failed to set FD_CLOEXEC to the epoll fd (errno=%d)\n", errno);
+            abort();
+        }
+    }
+    pthread_mutex_unlock(&cloexec_mutex);
+
+    return &loop->super;
+}