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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * Copyright 2016 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */

#include 
#include 
#include 
#include "netty_unix_util.h"

static const uint64_t NETTY_BILLION = 1000000000L;

#ifdef NETTY_USE_MACH_INSTEAD_OF_CLOCK

#include 
#include 

#endif /* NETTY_USE_MACH_INSTEAD_OF_CLOCK */

// util methods
uint64_t netty_unix_util_timespec_elapsed_ns(const struct timespec* begin, const struct timespec* end) {
  return NETTY_BILLION * (end->tv_sec - begin->tv_sec) + (end->tv_nsec - begin->tv_nsec);
}

jboolean netty_unix_util_timespec_subtract_ns(struct timespec* ts, uint64_t nanos) {
  const uint64_t seconds = nanos / NETTY_BILLION;
  nanos -= seconds * NETTY_BILLION;
  // If there are too many nanos we steal from seconds to avoid underflow on nanos. This way we
  // only have to worry about underflow on tv_sec.
  if (nanos > ts->tv_nsec) {
    --(ts->tv_sec);
    ts->tv_nsec += NETTY_BILLION;
  }
  const jboolean underflow = ts->tv_sec < seconds;
  ts->tv_sec -= seconds;
  ts->tv_nsec -= nanos;
  return underflow;
}

int netty_unix_util_clock_gettime(clockid_t clockId, struct timespec* tp) {
#ifdef NETTY_USE_MACH_INSTEAD_OF_CLOCK
  uint64_t timeNs;
  switch (clockId) {
  case CLOCK_MONOTONIC_COARSE:
    timeNs = mach_approximate_time();
    break;
  case CLOCK_MONOTONIC:
    timeNs = mach_absolute_time();
    break;
  default:
    errno = EINVAL;
    return -1;
  }
  // NOTE: this could overflow if time_t is backed by a 32 bit number.
  tp->tv_sec = timeNs / NETTY_BILLION;
  tp->tv_nsec = timeNs - tp->tv_sec * NETTY_BILLION; // avoid using modulo if not necessary
  return 0;
#else
  return clock_gettime(clockId, tp);
#endif /* NETTY_USE_MACH_INSTEAD_OF_CLOCK */
}

jboolean netty_unix_util_initialize_wait_clock(clockid_t* clockId) {
  struct timespec ts;
  // First try to get a monotonic clock, as we effectively measure execution time and don't want the underlying clock
  // moving unexpectedly/abruptly.
#ifdef CLOCK_MONOTONIC_COARSE
  *clockId = CLOCK_MONOTONIC_COARSE;
  if (netty_unix_util_clock_gettime(*clockId, &ts) == 0) {
    return JNI_TRUE;
  }
#endif
#ifdef CLOCK_MONOTONIC_RAW
  *clockId = CLOCK_MONOTONIC_RAW;
  if (netty_unix_util_clock_gettime(*clockId, &ts) == 0) {
    return JNI_TRUE;
  }
#endif
#ifdef CLOCK_MONOTONIC
  *clockId = CLOCK_MONOTONIC;
  if (netty_unix_util_clock_gettime(*clockId, &ts) == 0) {
    return JNI_TRUE;
  }
#endif

  // Fallback to realtime ... in this case we are subject to clock movements on the system.
#ifdef CLOCK_REALTIME_COARSE
  *clockId = CLOCK_REALTIME_COARSE;
  if (netty_unix_util_clock_gettime(*clockId, &ts) == 0) {
    return JNI_TRUE;
  }
#endif
#ifdef CLOCK_REALTIME
  *clockId = CLOCK_REALTIME;
  if (netty_unix_util_clock_gettime(*clockId, &ts) == 0) {
    return JNI_TRUE;
  }
#endif

  return JNI_FALSE;
}