diff options
Diffstat (limited to 'v_windows/v/thirdparty/picoev/src/picoev_epoll.c')
| -rw-r--r-- | v_windows/v/thirdparty/picoev/src/picoev_epoll.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/v_windows/v/thirdparty/picoev/src/picoev_epoll.c b/v_windows/v/thirdparty/picoev/src/picoev_epoll.c new file mode 100644 index 0000000..61bda4d --- /dev/null +++ b/v_windows/v/thirdparty/picoev/src/picoev_epoll.c @@ -0,0 +1,168 @@ +/* + * Copyright (c) 2009, Cybozu Labs, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * * Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * * Neither the name of the <ORGANIZATION> nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <errno.h> +#include <sys/epoll.h> +#include <unistd.h> +#include "picoev.h" + +#ifndef PICOEV_EPOLL_DEFER_DELETES +# define PICOEV_EPOLL_DEFER_DELETES 1 +#endif + +typedef struct picoev_loop_epoll_st { + picoev_loop loop; + int epfd; + struct epoll_event events[1024]; +} picoev_loop_epoll; + +picoev_globals picoev; + +picoev_loop* picoev_create_loop(int max_timeout) +{ + picoev_loop_epoll* loop; + + /* init parent */ + assert(PICOEV_IS_INITED); + if ((loop = (picoev_loop_epoll*)malloc(sizeof(picoev_loop_epoll))) == NULL) { + return NULL; + } + if (picoev_init_loop_internal(&loop->loop, max_timeout) != 0) { + free(loop); + return NULL; + } + + /* init myself */ + if ((loop->epfd = epoll_create(picoev.max_fd)) == -1) { + picoev_deinit_loop_internal(&loop->loop); + free(loop); + return NULL; + } + + loop->loop.now = time(NULL); + return &loop->loop; +} + +int picoev_destroy_loop(picoev_loop* _loop) +{ + picoev_loop_epoll* loop = (picoev_loop_epoll*)_loop; + + if (close(loop->epfd) != 0) { + return -1; + } + picoev_deinit_loop_internal(&loop->loop); + free(loop); + return 0; +} + +int picoev_update_events_internal(picoev_loop* _loop, int fd, int events) +{ + picoev_loop_epoll* loop = (picoev_loop_epoll*)_loop; + picoev_fd* target = picoev.fds + fd; + struct epoll_event ev; + int epoll_ret; + + memset( &ev, 0, sizeof( ev ) ); + assert(PICOEV_FD_BELONGS_TO_LOOP(&loop->loop, fd)); + + if ((events & PICOEV_READWRITE) == target->events) { + return 0; + } + + ev.events = ((events & PICOEV_READ) != 0 ? EPOLLIN : 0) + | ((events & PICOEV_WRITE) != 0 ? EPOLLOUT : 0); + ev.data.fd = fd; + +#define SET(op, check_error) do { \ + epoll_ret = epoll_ctl(loop->epfd, op, fd, &ev); \ + assert(! check_error || epoll_ret == 0); \ + } while (0) + +#if PICOEV_EPOLL_DEFER_DELETES + + if ((events & PICOEV_DEL) != 0) { + /* nothing to do */ + } else if ((events & PICOEV_READWRITE) == 0) { + SET(EPOLL_CTL_DEL, 1); + } else { + SET(EPOLL_CTL_MOD, 0); + if (epoll_ret != 0) { + assert(errno == ENOENT); + SET(EPOLL_CTL_ADD, 1); + } + } + +#else + + if ((events & PICOEV_READWRITE) == 0) { + SET(EPOLL_CTL_DEL, 1); + } else { + SET(target->events == 0 ? EPOLL_CTL_ADD : EPOLL_CTL_MOD, 1); + } + +#endif + +#undef SET + + target->events = events; + + return 0; +} + +int picoev_poll_once_internal(picoev_loop* _loop, int max_wait) +{ + picoev_loop_epoll* loop = (picoev_loop_epoll*)_loop; + int i, nevents; + + nevents = epoll_wait(loop->epfd, loop->events, + sizeof(loop->events) / sizeof(loop->events[0]), + max_wait * 1000); + if (nevents == -1) { + return -1; + } + for (i = 0; i < nevents; ++i) { + struct epoll_event* event = loop->events + i; + picoev_fd* target = picoev.fds + event->data.fd; + if (loop->loop.loop_id == target->loop_id + && (target->events & PICOEV_READWRITE) != 0) { + int revents = ((event->events & EPOLLIN) != 0 ? PICOEV_READ : 0) + | ((event->events & EPOLLOUT) != 0 ? PICOEV_WRITE : 0); + if (revents != 0) { + (*target->callback)(&loop->loop, event->data.fd, revents, + target->cb_arg); + } + } else { +#if PICOEV_EPOLL_DEFER_DELETES + event->events = 0; + epoll_ctl(loop->epfd, EPOLL_CTL_DEL, event->data.fd, event); +#endif + } + } + return 0; +} |