| /* |
| * |
| * Copyright 2016, Google 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 Google Inc. 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 |
| * OWNER 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 <ruby/ruby.h> |
| #include <signal.h> |
| #include <stdbool.h> |
| |
| #include <grpc/support/log.h> |
| |
| #include "rb_grpc.h" |
| |
| static void (*old_sigint_handler)(int); |
| static void (*old_sigterm_handler)(int); |
| |
| static volatile bool signal_received = false; |
| |
| /* This has to be handled at the C level instead of Ruby, because Ruby signal |
| * handlers are constrained to run in the main interpreter thread. If that main |
| * thread is blocked on grpc_completion_queue_pluck, the signal handlers will |
| * never run */ |
| static void handle_signal(int signum) { |
| signal_received = true; |
| if (signum == SIGINT) { |
| old_sigint_handler(signum); |
| } else if (signum == SIGTERM) { |
| old_sigterm_handler(signum); |
| } |
| } |
| |
| static VALUE grpc_rb_signal_received(VALUE self) { |
| (void)self; |
| return signal_received ? Qtrue : Qfalse; |
| } |
| |
| void Init_grpc_signals() { |
| old_sigint_handler = signal(SIGINT, handle_signal); |
| old_sigterm_handler = signal(SIGTERM, handle_signal); |
| rb_define_singleton_method(grpc_rb_mGrpcCore, "signal_received?", |
| grpc_rb_signal_received, 0); |
| } |