{
    This file is part of the Free Pascal run time library.
    Copyright (c) 1999-2000 by Peter Vreman
    member of the Free Pascal development team.

    See the file COPYING.FPC, included in this distribution,
    for details about the copyright.

    This file contains a pthread.h headerconversion,
    and should contain an interface to the threading library to be
    used by systhrd, preferably in a somewhat compatible notation
    (compared to the other OSes).

    As a start, I simply used libc_r

    This program 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.

 **********************************************************************}

CONST PTHREAD_EXPLICIT_SCHED       = 0;
      PTHREAD_CREATE_DETACHED      = 1;
      PTHREAD_SCOPE_PROCESS        = 0;
      SEM_SAFE = 255;

 TYPE
    ppthread_t      = ^pthread_t;
    ppthread_key_t  = ^pthread_key_t;
    ppthread_mutex_t= ^pthread_mutex_t;
    ppthread_attr_t = ^pthread_attr_t;
    ppthread_cond_t            = ^pthread_cond_t;
    ppthread_condattr_t        = ^pthread_condattr_t;

    __destr_func_t  = procedure (p :pointer);cdecl;
    __startroutine_t= function (p :pointer):pointer;cdecl;
    ppthread_mutexattr_t = ^pthread_mutexattr_t;
    ppthread_mutex_attr_t = ^pthread_mutexattr_t;

{
  From FreeBSD 8.2 sys/_semaphore.h
}

(*
struct sem {
#define SEM_MAGIC       ((u_int32_t) 0x09fa4012)
        u_int32_t       magic;
        pthread_mutex_t lock;
        pthread_cond_t  gtzero;
        u_int32_t       count;
        u_int32_t       nwaiters;
#define SEM_USER        (NULL)
        semid_t         semid;  /* semaphore id if kernel (shared) semaphore */
        int             syssem; /* 1 if kernel (shared) semaphore */
        LIST_ENTRY(sem) entry;
        struct sem      **backpointer;
}; *)
    semid_t        = pointer;
    psem_t         = ^sem_t;
    ppsem_t        = ^psem_t;
    sem_t = record
       magic   : cuint32;
       lock    : pthread_mutex_t;
       gtzero  : pthread_cond_t;
       count   : cuint32;
       nwaiters: cuint32;
       semid   : semid_t;
       sysse   : cint;
       entry   : psem_t;
       backpointer : ppsem_t;
       spare   : array[0..SEM_SAFE] of char;

    end;

    TSemaphore         = sem_t;
    PSemaphore         = ^TSemaphore;

function  pthread_getspecific      (t : pthread_key_t):pointer; cdecl; external;
function  pthread_setspecific      (t : pthread_key_t;p:pointer):cint; cdecl; external;
function  pthread_key_create         (p : ppthread_key_t;f: __destr_func_t):cint; cdecl;external;
function  pthread_attr_init          (p : ppthread_attr_t):cint; cdecl; external;
function  pthread_attr_setinheritsched(p : ppthread_attr_t;i:cint):cint; cdecl; external;
function  pthread_attr_setscope      (p : ppthread_attr_t;i:cint):cint;cdecl;external;
function  pthread_attr_setdetachstate(p : ppthread_attr_t;i:cint):cint;cdecl;external;
function  pthread_attr_setstacksize  (p : ppthread_attr_t; stacksize: size_t):cint;cdecl;external;
function  pthread_attr_destroy       (p : ppthread_attr_t):cint;cdecl;external;
function  pthread_create ( p: ppthread_t;attr : ppthread_attr_t;f:__startroutine_t;arg:pointer):cint;cdecl;external;
procedure pthread_exit  ( p: pointer); cdecl;external;
function  pthread_self:pthread_t; cdecl;external;
function  pthread_mutex_init (p:ppthread_mutex_t;o:ppthread_mutex_attr_t):cint; cdecl;external;
function  pthread_mutex_destroy (p:ppthread_mutex_attr_t):cint; cdecl;external;
function  pthread_mutex_lock    (p:ppthread_mutex_attr_t):cint; cdecl;external;
function  pthread_mutex_trylock    (p:ppthread_mutex_attr_t):cint; cdecl;external;
function  pthread_mutex_unlock  (p:ppthread_mutex_attr_t):cint; cdecl;external;
function  pthread_cancel(_para1:pthread_t):cint;cdecl;external;
function  pthread_detach(_para1:pthread_t):cint;cdecl;external;
function  pthread_join(_para1:pthread_t; _para2:Ppointer):cint;cdecl;external;
function pthread_cond_destroy(_para1:Ppthread_cond_t):cint;cdecl;external;
function pthread_cond_init(_para1:Ppthread_cond_t;_para2:Ppthread_condattr_t):cint;cdecl;external;
function pthread_cond_signal(_para1:Ppthread_cond_t):cint;cdecl;external;
function pthread_cond_broadcast(_para1:Ppthread_cond_t):cint;cdecl;external;
function pthread_cond_wait(_para1:Ppthread_cond_t;_para2:Ppthread_mutex_t):cint;cdecl;external;
function pthread_kill(__thread:pthread_t; __signo:cint):cint;cdecl;external;
function pthread_sigmask(how: cint; nset: psigset; oset: psigset): cint; cdecl; external;

function sem_init(__sem:Psem_t; __pshared:cint;__value:dword):cint;cdecl; external;
function sem_destroy(__sem:Psem_t):cint;cdecl;external ;
function sem_close(__sem:Psem_t):cint;cdecl;external ;
function sem_unlink(__name:Pchar):cint;cdecl;external ;
function sem_wait(__sem:Psem_t):cint;cdecl;external ;
function sem_trywait(__sem:Psem_t):cint;cdecl;external ;
function sem_post(__sem:Psem_t):cint;cdecl;external ;
function sem_getvalue(__sem:Psem_t; __sval:Pcint):cint;cdecl;external;
function pthread_mutexattr_init(_para1:Ppthread_mutexattr_t):cint;cdecl;external;
function pthread_mutexattr_destroy(_para1:Ppthread_mutexattr_t):cint;cdecl;external;
function pthread_mutexattr_gettype(_para1:Ppthread_mutexattr_t; _para2:Pcint):cint;cdecl;external;
function pthread_mutexattr_settype(_para1:Ppthread_mutexattr_t; _para2:cint):cint;cdecl;external;
function pthread_cond_timedwait(__cond:ppthread_cond_t; __mutex:ppthread_mutex_t; __abstime:ptimespec):longint;cdecl;external;