pthread-fixes.c

/* Copyright (c) 2013, Sony Mobile Communications AB
 * Copyright (c) 2012, Google Inc.
   All rights reserved.

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   modification, are permitted provided that the following conditions are
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   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
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*/

/* Android versions < 4.1 have a broken pthread_sigmask. */
#include "uv-common.h"

#include <errno.h>
#include <pthread.h>
#include <signal.h>

int uv__pthread_sigmask(int how, const sigset_t* set, sigset_t* oset) {
  static int workaround;
  int err;

  if (uv__load_relaxed(&workaround)) {
    return sigprocmask(how, set, oset);
  } else {
    err = pthread_sigmask(how, set, oset);
    if (err) {
      if (err == EINVAL && sigprocmask(how, set, oset) == 0) {
        uv__store_relaxed(&workaround, 1);
        return 0;
      } else {
        return -1;
      }
    }
  }

  return 0;
}