libc/bionic/malloc_debug_disable.h

/*
 * Copyright (C) 2014 The Android Open Source Project
 * 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.
 *
 * 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.
 */

#ifndef MALLOC_DEBUG_DISABLE_H
#define MALLOC_DEBUG_DISABLE_H

#include <pthread.h>

#include "private/bionic_macros.h"

// =============================================================================
// Used to disable the debug allocation calls.
// =============================================================================
extern pthread_key_t g_debug_calls_disabled;

static inline bool DebugCallsDisabled() {
  return pthread_getspecific(g_debug_calls_disabled) != NULL;
}

class ScopedDisableDebugCalls {
 public:
  ScopedDisableDebugCalls() : disabled_(DebugCallsDisabled()) {
    if (!disabled_) {
      pthread_setspecific(g_debug_calls_disabled, reinterpret_cast<const void*>(1));
    }
  }
  ~ScopedDisableDebugCalls() {
    if (!disabled_) {
      pthread_setspecific(g_debug_calls_disabled, NULL);
    }
  }

 private:
  bool disabled_;

  DISALLOW_COPY_AND_ASSIGN(ScopedDisableDebugCalls);
};

#endif  // MALLOC_DEBUG_DISABLE_H