File: maybe_threads.h

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// -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*-
// Copyright (c) 2005, 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.

// ---
// Author: Paul Menage <opensource@google.com>

//-------------------------------------------------------------------
// Some wrappers for pthread functions so that we can be LD_PRELOADed
// against non-pthreads apps.
//-------------------------------------------------------------------

#ifndef GOOGLE_MAYBE_THREADS_H_
#define GOOGLE_MAYBE_THREADS_H_

#ifdef HAVE_PTHREAD
#include <pthread.h>
#endif

int perftools_pthread_key_create(pthread_key_t *key,
                                 void (*destr_function) (void *));
int perftools_pthread_key_delete(pthread_key_t key);
void *perftools_pthread_getspecific(pthread_key_t key);
int perftools_pthread_setspecific(pthread_key_t key, void *val);
int perftools_pthread_once(pthread_once_t *ctl,
                           void  (*init_routine) (void));

// Our wrapper for pthread_atfork. Does _nothing_ when there are no
// threads. See static_vars.cc:SetupAtForkLocksHandler for only user
// of this.
void perftools_pthread_atfork(void (*before)(),
                              void (*parent_after)(),
                              void (*child_after)());

#endif  /* GOOGLE_MAYBE_THREADS_H_ */