YugabyteDB (2.13.1.0-b60, 21121d69985fbf76aa6958d8f04a9bfa936293b5)

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//

//   http://www.apache.org/licenses/LICENSE-2.0

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// under the License.

//

// The following only applies to changes made to this file as part of YugaByte development.

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// Portions Copyright (c) YugaByte, Inc.

//

// Licensed 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

//

// http://www.apache.org/licenses/LICENSE-2.0

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// Unless required by applicable law or agreed to in writing, software distributed under the License

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#include <glog/logging.h>

#include "yb/util/thread.h"

#include "yb/util/threadlocal.h"

#include "yb/util/thread_restrictions.h"

#ifdef ENABLE_THREAD_RESTRICTIONS

namespace yb {

namespace {

struct LocalThreadRestrictions {

  LocalThreadRestrictions()

    : io_allowed(true),

      wait_allowed(true),

      singleton_allowed(true) {

  }

  bool io_allowed;

  bool wait_allowed;

  bool singleton_allowed;

};

LocalThreadRestrictions* LoadTLS() {

  BLOCK_STATIC_THREAD_LOCAL(LocalThreadRestrictions, local_thread_restrictions);

  return local_thread_restrictions;

}

} // anonymous namespace

bool ThreadRestrictions::SetIOAllowed(bool allowed) {

  bool previous_allowed = LoadTLS()->io_allowed;

  LoadTLS()->io_allowed = allowed;

  return previous_allowed;

}

void ThreadRestrictions::AssertIOAllowed() {

  CHECK(LoadTLS()->io_allowed)

    << "Function marked as IO-only was called from a thread that "

    << "disallows IO!  If this thread really should be allowed to "

    << "make IO calls, adjust the call to "

    << "yb::ThreadRestrictions::SetIOAllowed() in this thread's "

    << "startup. "

    << (Thread::current_thread() ? 
Thread::current_thread()->ToString()0
 : "(not a yb::Thread)");

}

bool ThreadRestrictions::SetWaitAllowed(bool allowed) {

  bool previous_allowed = LoadTLS()->wait_allowed;

  LoadTLS()->wait_allowed = allowed;

  return previous_allowed;

}

bool ThreadRestrictions::IsWaitAllowed() {

  return LoadTLS()->wait_allowed;

}

void ThreadRestrictions::AssertWaitAllowed() {

  CHECK(LoadTLS()->wait_allowed)

    << "Waiting is not allowed to be used on this thread to prevent "

    << "server-wide latency aberrations and deadlocks. "

    << (Thread::current_thread() ? 
Thread::current_thread()->ToString()0
 : "(not a yb::Thread)");

}

} // namespace yb

#endif