68 lines
1.7 KiB
C++
68 lines
1.7 KiB
C++
// Copyright (c) 2013 GitHub, Inc.
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// Use of this source code is governed by the MIT license that can be
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// found in the LICENSE file.
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#include "atom/common/node_bindings_mac.h"
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#include <errno.h>
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#include <sys/sysctl.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include "atom/common/node_includes.h"
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namespace atom {
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NodeBindingsMac::NodeBindingsMac(bool is_browser)
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: NodeBindings(is_browser),
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kqueue_(kqueue()) {
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// Add uv's backend fd to kqueue.
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struct kevent ev;
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EV_SET(&ev, uv_backend_fd(uv_loop_), EVFILT_READ, EV_ADD | EV_ENABLE,
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0, 0, 0);
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kevent(kqueue_, &ev, 1, NULL, 0, NULL);
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}
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NodeBindingsMac::~NodeBindingsMac() {
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}
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void NodeBindingsMac::RunMessageLoop() {
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// Get notified when libuv's watcher queue changes.
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uv_loop_->data = this;
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uv_loop_->on_watcher_queue_updated = OnWatcherQueueChanged;
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NodeBindings::RunMessageLoop();
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}
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// static
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void NodeBindingsMac::OnWatcherQueueChanged(uv_loop_t* loop) {
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NodeBindingsMac* self = static_cast<NodeBindingsMac*>(loop->data);
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// We need to break the io polling in the kqueue thread when loop's watcher
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// queue changes, otherwise new events cannot be notified.
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self->WakeupEmbedThread();
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}
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void NodeBindingsMac::PollEvents() {
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struct timespec spec;
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int timeout = uv_backend_timeout(uv_loop_);
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if (timeout != -1) {
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spec.tv_sec = timeout / 1000;
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spec.tv_nsec = (timeout % 1000) * 1000000;
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}
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// Wait for new libuv events.
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int r;
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do {
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struct kevent ev;
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r = ::kevent(kqueue_, NULL, 0, &ev, 1,
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timeout == -1 ? NULL : &spec);
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} while (r == -1 && errno == EINTR);
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}
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// static
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NodeBindings* NodeBindings::Create(bool is_browser) {
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return new NodeBindingsMac(is_browser);
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}
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} // namespace atom
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