1 files changed, 178 insertions, 0 deletions
diff --git a/web/server/h2o/libh2o/lib/common/socket/evloop/poll.c.h b/web/server/h2o/libh2o/lib/common/socket/evloop/poll.c.h
new file mode 100644
index 00000000..8b3f3d14
--- /dev/null
+++ b/web/server/h2o/libh2o/lib/common/socket/evloop/poll.c.h
@@ -0,0 +1,178 @@
+/*
+ * Copyright (c) 2014,2015 DeNA Co., Ltd., Kazuho Oku
+ *
+ * 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 <stdio.h>
+#include <poll.h>
+
+#if 0
+#define DEBUG_LOG(...) fprintf(stderr, __VA_ARGS__)
+#else
+#define DEBUG_LOG(...)
+#endif
+
+struct st_h2o_evloop_poll_t {
+    h2o_evloop_t super;
+    H2O_VECTOR(struct st_h2o_evloop_socket_t *) socks;
+};
+
+static void update_socks(struct st_h2o_evloop_poll_t *loop)
+{
+    /* update loop->socks */
+    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) {
+            assert(sock->fd == -1);
+            free(sock);
+        } else {
+            assert(sock->fd < loop->socks.size);
+            if (loop->socks.entries[sock->fd] == NULL) {
+                loop->socks.entries[sock->fd] = sock;
+            } else {
+                assert(loop->socks.entries[sock->fd] == sock);
+            }
+            if (h2o_socket_is_reading(&sock->super)) {
+                DEBUG_LOG("setting READ for fd: %d\n", sock->fd);
+                sock->_flags |= H2O_SOCKET_FLAG_IS_POLLED_FOR_READ;
+            } else {
+                DEBUG_LOG("clearing READ for fd: %d\n", sock->fd);
+                sock->_flags &= ~H2O_SOCKET_FLAG_IS_POLLED_FOR_READ;
+            }
+            if (h2o_socket_is_writing(&sock->super)) {
+                DEBUG_LOG("setting WRITE for fd: %d\n", sock->fd);
+                sock->_flags |= H2O_SOCKET_FLAG_IS_POLLED_FOR_WRITE;
+            } else {
+                DEBUG_LOG("clearing WRITE for fd: %d\n", sock->fd);
+                sock->_flags &= ~H2O_SOCKET_FLAG_IS_POLLED_FOR_WRITE;
+            }
+        }
+    }
+    loop->super._statechanged.tail_ref = &loop->super._statechanged.head;
+}
+
+int evloop_do_proceed(h2o_evloop_t *_loop, int32_t max_wait)
+{
+    struct st_h2o_evloop_poll_t *loop = (struct st_h2o_evloop_poll_t *)_loop;
+    H2O_VECTOR(struct pollfd) pollfds = {NULL};
+    int fd, ret;
+
+    /* update status */
+    update_socks(loop);
+
+    /* build list of fds to be polled */
+    for (fd = 0; fd != loop->socks.size; ++fd) {
+        struct st_h2o_evloop_socket_t *sock = loop->socks.entries[fd];
+        if (sock == NULL)
+            continue;
+        assert(fd == sock->fd);
+        if ((sock->_flags & (H2O_SOCKET_FLAG_IS_POLLED_FOR_READ | H2O_SOCKET_FLAG_IS_POLLED_FOR_WRITE)) != 0) {
+            h2o_vector_reserve(NULL, &pollfds, pollfds.size + 1);
+            struct pollfd *slot = pollfds.entries + pollfds.size++;
+            slot->fd = fd;
+            slot->events = 0;
+            slot->revents = 0;
+            if ((sock->_flags & H2O_SOCKET_FLAG_IS_POLLED_FOR_READ) != 0)
+                slot->events |= POLLIN;
+            if ((sock->_flags & H2O_SOCKET_FLAG_IS_POLLED_FOR_WRITE) != 0)
+                slot->events |= POLLOUT;
+        }
+    }
+
+    /* call */
+    max_wait = adjust_max_wait(&loop->super, max_wait);
+    ret = poll(pollfds.entries, (nfds_t)pollfds.size, max_wait);
+    update_now(&loop->super);
+    if (ret == -1)
+        goto Exit;
+    DEBUG_LOG("poll returned: %d\n", ret);
+
+    /* update readable flags, perform writes */
+    if (ret > 0) {
+        size_t i;
+        h2o_sliding_counter_start(&loop->super.exec_time_counter, loop->super._now);
+        for (i = 0; i != pollfds.size; ++i) {
+            /* set read_ready flag before calling the write cb, since app. code invoked by the latter may close the socket, clearing
+             * the former flag */
+            if ((pollfds.entries[i].revents & POLLIN) != 0) {
+                struct st_h2o_evloop_socket_t *sock = loop->socks.entries[pollfds.entries[i].fd];
+                assert(sock != NULL);
+                assert(sock->fd == pollfds.entries[i].fd);
+                if (sock->_flags != H2O_SOCKET_FLAG_IS_DISPOSED) {
+                    sock->_flags |= H2O_SOCKET_FLAG_IS_READ_READY;
+                    link_to_pending(sock);
+                    DEBUG_LOG("added fd %d as read_ready\n", sock->fd);
+                }
+            }
+            if ((pollfds.entries[i].revents & POLLOUT) != 0) {
+                struct st_h2o_evloop_socket_t *sock = loop->socks.entries[pollfds.entries[i].fd];
+                assert(sock != NULL);
+                assert(sock->fd == pollfds.entries[i].fd);
+                if (sock->_flags != H2O_SOCKET_FLAG_IS_DISPOSED) {
+                    DEBUG_LOG("handling pending writes on fd %d\n", fd);
+                    write_pending(sock);
+                }
+            }
+        }
+        ret = 0;
+    }
+
+Exit:
+    free(pollfds.entries);
+    return ret;
+}
+
+static void evloop_do_on_socket_create(struct st_h2o_evloop_socket_t *sock)
+{
+    struct st_h2o_evloop_poll_t *loop = (struct st_h2o_evloop_poll_t *)sock->loop;
+
+    if (sock->fd >= loop->socks.size) {
+        h2o_vector_reserve(NULL, &loop->socks, sock->fd + 1);
+        memset(loop->socks.entries + loop->socks.size, 0, (sock->fd + 1 - loop->socks.size) * sizeof(loop->socks.entries[0]));
+        loop->socks.size = sock->fd + 1;
+    }
+
+    if (loop->socks.entries[sock->fd] != NULL)
+        assert(loop->socks.entries[sock->fd]->_flags == H2O_SOCKET_FLAG_IS_DISPOSED);
+}
+
+static void evloop_do_on_socket_close(struct st_h2o_evloop_socket_t *sock)
+{
+    struct st_h2o_evloop_poll_t *loop = (struct st_h2o_evloop_poll_t *)sock->loop;
+
+    if (sock->fd != -1)
+        loop->socks.entries[sock->fd] = NULL;
+}
+
+static void evloop_do_on_socket_export(struct st_h2o_evloop_socket_t *sock)
+{
+    struct st_h2o_evloop_poll_t *loop = (struct st_h2o_evloop_poll_t *)sock->loop;
+    evloop_do_on_socket_close(sock);
+    loop->socks.entries[sock->fd] = NULL;
+}
+
+h2o_evloop_t *h2o_evloop_create(void)
+{
+    struct st_h2o_evloop_poll_t *loop = (struct st_h2o_evloop_poll_t *)create_evloop(sizeof(*loop));
+    return &loop->super;
+}