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/* Copyright Joyent, Inc. and other Node contributors. All rights reserved. | ||
* | ||
* 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. | ||
*/ | ||
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#include "uv.h" | ||
#include "internal.h" | ||
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#include <unistd.h> | ||
#include <assert.h> | ||
#include <errno.h> | ||
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static void uv__poll_io(EV_P_ ev_io* watcher, int ev_events) { | ||
uv_poll_t* handle = watcher->data; | ||
int events; | ||
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if (ev_events & EV_ERROR) { | ||
/* An error happened. Libev has implicitly stopped the watcher, but we */ | ||
/* need to fix the refcount. */ | ||
uv_ref(handle->loop); | ||
uv__set_sys_error(handle->loop, EBADF); | ||
handle->poll_cb(handle, -1, 0); | ||
return; | ||
} | ||
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assert(ev_events & (EV_READ | EV_WRITE)); | ||
assert((ev_events & ~(EV_READ | EV_WRITE)) == 0); | ||
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events = 0; | ||
if (ev_events & EV_READ) | ||
events |= UV_READABLE; | ||
if (ev_events & EV_WRITE) | ||
events |= UV_WRITABLE; | ||
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handle->poll_cb(handle, 0, events); | ||
} | ||
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int uv_poll_init(uv_loop_t* loop, uv_poll_t* handle, int fd) { | ||
uv__handle_init(loop, (uv_handle_t*) handle, UV_POLL); | ||
loop->counters.poll_init++; | ||
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handle->fd = fd; | ||
handle->poll_cb = NULL; | ||
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ev_init(&handle->io_watcher, uv__poll_io); | ||
handle->io_watcher.data = handle; | ||
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return 0; | ||
} | ||
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int uv_poll_init_socket(uv_loop_t* loop, uv_poll_t* handle, | ||
uv_os_sock_t socket) { | ||
return uv_poll_init(loop, handle, socket); | ||
} | ||
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static void uv__poll_stop(uv_poll_t* handle) { | ||
if (ev_is_active(&handle->io_watcher)) { | ||
ev_io_stop(handle->loop->ev, &handle->io_watcher); | ||
uv_ref(handle->loop); | ||
} | ||
} | ||
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int uv_poll_stop(uv_poll_t* handle) { | ||
assert(!(handle->flags & (UV_CLOSING | UV_CLOSED))); | ||
uv__poll_stop(handle); | ||
return 0; | ||
} | ||
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int uv_poll_start(uv_poll_t* handle, int events, uv_poll_cb poll_cb) { | ||
int ev_events; | ||
int was_active; | ||
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assert((events & ~(UV_READABLE | UV_WRITABLE)) == 0); | ||
assert(!(handle->flags & (UV_CLOSING | UV_CLOSED))); | ||
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if (events == 0) { | ||
uv__poll_stop(handle); | ||
return 0; | ||
} | ||
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ev_events = 0; | ||
if (events & UV_READABLE) | ||
ev_events |= EV_READ; | ||
if (events & UV_WRITABLE) | ||
ev_events |= EV_WRITE; | ||
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was_active = ev_is_active(&handle->io_watcher); | ||
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ev_io_set(&handle->io_watcher, handle->fd, ev_events); | ||
ev_io_start(handle->loop->ev, &handle->io_watcher); | ||
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if (!was_active) | ||
uv_unref(handle->loop); | ||
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handle->poll_cb = poll_cb; | ||
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return 0; | ||
} | ||
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void uv__poll_close(uv_poll_t* handle) { | ||
uv__poll_stop(handle); | ||
} | ||
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int uv__poll_active(const uv_poll_t* handle) { | ||
return ev_is_active(&handle->io_watcher); | ||
} |
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