gcc/libgcc/config/s390/gthr-tpf.h

/* Threads compatibility routines for libgcc2 and libobjc.
   Compile this one with gcc.
   Copyright (C) 2004-2017 Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.

GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.

You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
<http://www.gnu.org/licenses/>.  */

/* TPF needs its own version of gthr-*.h because TPF always links to
   the thread library.  However, for performance reasons we still do not
   want to issue thread api calls unless a check is made to see that we
   are running as a thread.  */

#ifndef GCC_GTHR_TPF_H
#define GCC_GTHR_TPF_H

/* POSIX threads specific definitions.
   Easy, since the interface is just one-to-one mapping.  */

#define __GTHREADS 1

/* Some implementations of <pthread.h> require this to be defined.  */
#ifndef _REENTRANT
#define _REENTRANT 1
#endif

#include <pthread.h>
#include <unistd.h>

typedef pthread_key_t __gthread_key_t;
typedef pthread_once_t __gthread_once_t;
typedef pthread_mutex_t __gthread_mutex_t;
typedef pthread_mutex_t __gthread_recursive_mutex_t;

#if defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER)
#define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER
#elif defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP)
#define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
#endif

#define __GTHREAD_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
#define __GTHREAD_ONCE_INIT PTHREAD_ONCE_INIT
#define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function

#define NOTATHREAD   00
#define ECBBASEPTR (unsigned long int) *(unsigned int *)0x00000514u
#define ECBPG2PTR  ECBBASEPTR + 0x1000
#define CE2THRCPTR *((unsigned char *)(ECBPG2PTR + 16))
#define __tpf_pthread_active() (CE2THRCPTR != NOTATHREAD)

#if SUPPORTS_WEAK && GTHREAD_USE_WEAK
# define __gthrw(name) \
  static __typeof(name) __gthrw_ ## name __attribute__ ((__weakref__(#name)));
# define __gthrw_(name) __gthrw_ ## name
#else
# define __gthrw(name)
# define __gthrw_(name) name
#endif

__gthrw(pthread_once)
__gthrw(pthread_key_create)
__gthrw(pthread_key_delete)
__gthrw(pthread_getspecific)
__gthrw(pthread_setspecific)
__gthrw(pthread_create)

__gthrw(pthread_mutex_lock)
__gthrw(pthread_mutex_trylock)
__gthrw(pthread_mutex_unlock)
__gthrw(pthread_mutexattr_init)
__gthrw(pthread_mutexattr_settype)
__gthrw(pthread_mutexattr_destroy)
__gthrw(pthread_mutex_init)
__gthrw(pthread_mutex_destroy)

static inline int
__gthread_active_p (void)
{
  return 1;
}

static inline int
__gthread_once (__gthread_once_t *__once, void (*__func) (void))
{
  if (__tpf_pthread_active ())
    return __gthrw_(pthread_once) (__once, __func);
  else
    return -1;
}

static inline int
__gthread_key_create (__gthread_key_t *__key, void (*__dtor) (void *))
{
  if (__tpf_pthread_active ())
    return __gthrw_(pthread_key_create) (__key, __dtor);
  else
    return -1;
}

static inline int
__gthread_key_delete (__gthread_key_t __key)
{
  if (__tpf_pthread_active ())
    return __gthrw_(pthread_key_delete) (__key);
  else
    return -1;
}

static inline void *
__gthread_getspecific (__gthread_key_t __key)
{
  if (__tpf_pthread_active ())
    return __gthrw_(pthread_getspecific) (__key);
  else
    return NULL;
}

static inline int
__gthread_setspecific (__gthread_key_t __key, const void *__ptr)
{
  if (__tpf_pthread_active ())
    return __gthrw_(pthread_setspecific) (__key, __ptr);
  else
    return -1;
}

static inline int
__gthread_mutex_destroy (__gthread_mutex_t *__mutex)
{
  if (__tpf_pthread_active ())
    return __gthrw_(pthread_mutex_destroy) (__mutex);
  else
    return 0;
}

static inline int
__gthread_mutex_lock (__gthread_mutex_t *__mutex)
{
  if (__tpf_pthread_active ())
    return __gthrw_(pthread_mutex_lock) (__mutex);
  else
    return 0;
}

static inline int
__gthread_mutex_trylock (__gthread_mutex_t *__mutex)
{
  if (__tpf_pthread_active ())
    return __gthrw_(pthread_mutex_trylock) (__mutex);
  else
    return 0;
}

static inline int
__gthread_mutex_unlock (__gthread_mutex_t *__mutex)
{
  if (__tpf_pthread_active ())
    return __gthrw_(pthread_mutex_unlock) (__mutex);
  else
    return 0;
}

static inline int
__gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex)
{
  if (__tpf_pthread_active ())
    return __gthread_mutex_lock (__mutex);
  else
    return 0;
}

static inline int
__gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex)
{
  if (__tpf_pthread_active ())
    return __gthread_mutex_trylock (__mutex);
  else
    return 0;
}

static inline int
__gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex)
{
  if (__tpf_pthread_active ())
    return __gthread_mutex_unlock (__mutex);
  else
    return 0;
}

static inline int
__gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *__mutex)
{
  if (__tpf_pthread_active ())
    {
      pthread_mutexattr_t __attr;
      int __r;

      __r = __gthrw_(pthread_mutexattr_init) (&__attr);
      if (!__r)
	__r = __gthrw_(pthread_mutexattr_settype) (&__attr,
						   PTHREAD_MUTEX_RECURSIVE);
      if (!__r)
	__r = __gthrw_(pthread_mutex_init) (__mutex, &__attr);
      if (!__r)
	__r = __gthrw_(pthread_mutexattr_destroy) (&__attr);
      return __r;
    }
  return 0;
}

static inline int
__gthread_recursive_mutex_destroy (__gthread_recursive_mutex_t *__mutex)
{
  return __gthread_mutex_destroy (__mutex);
}

#endif /* ! GCC_GTHR_TPF_H */