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/*
*
* 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);
}
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