/* solaris */
#define _POSIX_PTHREAD_SEMANTICS 1

#if __linux && !defined(_GNU_SOURCE)
# define _GNU_SOURCE
#endif

/* just in case */
#define _REENTRANT 1

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

#ifndef PTHREAD_STACK_MIN
/* care for broken platforms, e.g. windows */
# define PTHREAD_STACK_MIN 16384
#endif

#if __ia64
# define STACKSIZE 65536
#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
# define STACKSIZE PTHREAD_STACK_MIN
#else
# define STACKSIZE 16384
#endif

/* wether word reads are potentially non-atomic.
 * this is conservatice, likely most arches this runs
 * on have atomic word read/writes.
 */
#ifndef WORDACCESS_UNSAFE
# if __i386 || __x86_64
#  define WORDACCESS_UNSAFE 0
# else
#  define WORDACCESS_UNSAFE 1
# endif
#endif

typedef pthread_mutex_t mutex_t;
#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
# define MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
#else
# define MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
#endif

typedef pthread_cond_t cond_t;
#define COND_INIT PTHREAD_COND_INITIALIZER

#define LOCK(mutex)   pthread_mutex_lock   (&(mutex))
#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))

#define COND_SIGNAL(cond) pthread_cond_signal (&(cond))
#define COND_WAIT(cond,mutex) pthread_cond_wait (&(cond), &(mutex))
#define COND_TIMEDWAIT(cond,mutex,to) pthread_cond_timedwait (&(cond), &(mutex), &(to))

typedef pthread_t thread_t;

static int thread_create (thread_t *tid, void *(*proc)(void *), void *arg)
{
  int retval;
  sigset_t fullsigset, oldsigset;
  pthread_attr_t attr;

  pthread_attr_init (&attr);
  pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
#ifdef PTHREAD_SCOPE_PROCESS
  pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
#endif

  sigfillset (&fullsigset);

  pthread_sigmask (SIG_SETMASK, &fullsigset, &oldsigset);
  retval = pthread_create (tid, &attr, proc, arg) == 0;
  pthread_sigmask (SIG_SETMASK, &oldsigset, 0);

  return retval;
}

#define ATFORK(prepare,parent,child) pthread_atfork (prepare, parent, child)