/*
**  GNU Pth - The GNU Portable Threads
**  Copyright (c) 1999-2001 Ralf S. Engelschall <rse@engelschall.com>
**
**  This file is part of GNU Pth, a non-preemptive thread scheduling
**  library which can be found at http://www.gnu.org/software/pth/.
**
**  This library is free software; you can redistribute it and/or
**  modify it under the terms of the GNU Lesser General Public
**  License as published by the Free Software Foundation; either
**  version 2.1 of the License, or (at your option) any later version.
**
**  This library 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
**  Lesser General Public License for more details.
**
**  You should have received a copy of the GNU Lesser General Public
**  License along with this library; if not, write to the Free Software
**  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
**  USA, or contact Ralf S. Engelschall <rse@engelschall.com>.
**
**  pthread.h: POSIX Thread ("Pthread") API for Pth
*/
                             /* ``Only those who attempt the absurd
                                  can achieve the impossible.''
                                               -- Unknown          */
#ifndef _PTH_PTHREAD_H_
#define _PTH_PTHREAD_H_

/*
**
** BOOTSTRAPPING
**
*/

/*
 * Prevent system includes from implicitly including
 * possibly existing vendor Pthread headers
 */
#define PTHREAD
#define PTHREAD_H
#define _PTHREAD_H
#define _PTHREAD_H_
#define PTHREAD_INCLUDED
#define _PTHREAD_INCLUDED
#define SYS_PTHREAD_H
#define _SYS_PTHREAD_H
#define _SYS_PTHREAD_H_
#define SYS_PTHREAD_INCLUDED
#define _SYS_PTHREAD_INCLUDED
#define BITS_PTHREADTYPES_H
#define _BITS_PTHREADTYPES_H
#define _BITS_PTHREADTYPES_H_
#define _BITS_SIGTHREAD_H

/*
 * Special adjustments
 */
#if defined(__hpux)
#define _PTHREADS_DRAFT4
#endif

/*
 * Protect namespace, because possibly existing vendor Pthread stuff
 * would certainly conflict with our defintions of pthread*_t.
 */
#define pthread_t              __vendor_pthread_t
#define pthread_attr_t         __vendor_pthread_attr_t
#define pthread_key_t          __vendor_pthread_key_t
#define pthread_once_t         __vendor_pthread_once_t
#define pthread_mutex_t        __vendor_pthread_mutex_t
#define pthread_mutexattr_t    __vendor_pthread_mutexattr_t
#define pthread_cond_t         __vendor_pthread_cond_t
#define pthread_condattr_t     __vendor_pthread_condattr_t
#define pthread_rwlock_t       __vendor_pthread_rwlock_t
#define pthread_rwlockattr_t   __vendor_pthread_rwlockattr_t
#define sched_param            __vendor_sched_param

/*
 * Allow structs containing pthread*_t in vendor headers
 * to have some type definitions
 */
#if 0
typedef int __vendor_pthread_t;
typedef int __vendor_pthread_attr_t;
typedef int __vendor_pthread_key_t;
typedef int __vendor_pthread_once_t;
typedef int __vendor_pthread_mutex_t;
typedef int __vendor_pthread_mutexattr_t;
typedef int __vendor_pthread_cond_t;
typedef int __vendor_pthread_condattr_t;
typedef int __vendor_pthread_rwlock_t;
typedef int __vendor_pthread_rwlockattr_t;
typedef int __vendor_sched_param;
#endif

/*
 * Include essential vendor headers
 */
#include <sys/types.h>     /* for ssize_t         */
#include <sys/time.h>      /* for struct timeval  */
#include <sys/socket.h>    /* for sockaddr        */
#include <sys/signal.h>    /* for sigset_t        */
#include <time.h>          /* for struct timespec */
#include <unistd.h>        /* for off_t           */
#include <sys/select.h>

/*
 * Unprotect namespace, so we can define our own variants now
 */
#undef pthread_t
#undef pthread_attr_t
#undef pthread_key_t
#undef pthread_once_t
#undef pthread_mutex_t
#undef pthread_mutexattr_t
#undef pthread_cond_t
#undef pthread_condattr_t
#undef pthread_rwlock_t
#undef pthread_rwlockattr_t
#undef sched_param

/*
 * Cleanup more Pthread namespace from vendor values
 */
#undef  _POSIX_THREADS
#undef  _POSIX_THREAD_ATTR_STACKADDR
#undef  _POSIX_THREAD_ATTR_STACKSIZE
#undef  _POSIX_THREAD_PRIORITY_SCHEDULING
#undef  _POSIX_THREAD_PRIO_INHERIT
#undef  _POSIX_THREAD_PRIO_PROTECT
#undef  _POSIX_THREAD_PROCESS_SHARED
#undef  _POSIX_THREAD_SAFE_FUNCTIONS
#undef  PTHREAD_DESTRUCTOR_ITERATIONS
#undef  PTHREAD_KEYS_MAX
#undef  PTHREAD_STACK_MIN
#undef  PTHREAD_THREADS_MAX
#undef  PTHREAD_CREATE_DETACHED
#undef  PTHREAD_CREATE_JOINABLE
#undef  PTHREAD_SCOPE_SYSTEM
#undef  PTHREAD_SCOPE_PROCESS
#undef  PTHREAD_INHERIT_SCHED
#undef  PTHREAD_EXPLICIT_SCHED
#undef  PTHREAD_CANCEL_ENABLE
#undef  PTHREAD_CANCEL_DISABLE
#undef  PTHREAD_CANCEL_ASYNCHRONOUS
#undef  PTHREAD_CANCEL_DEFERRED
#undef  PTHREAD_CANCELED
#undef  PTHREAD_PROCESS_PRIVATE
#undef  PTHREAD_PROCESS_SHARED
#undef  PTHREAD_ONCE_INIT
#undef  PTHREAD_MUTEX_DEFAULT
#undef  PTHREAD_MUTEX_RECURSIVE
#undef  PTHREAD_MUTEX_NORMAL
#undef  PTHREAD_MUTEX_ERRORCHECK
#undef  PTHREAD_MUTEX_INITIALIZER
#undef  PTHREAD_COND_INITIALIZER
#undef  PTHREAD_RWLOCK_INITIALIZER

/*
 * Cleanup special adjustments
 */
#if defined(__hpux)
#undef _PTHREADS_DRAFT4
#endif

/*
**
** API DEFINITION
**
*/

#ifdef __cplusplus
extern "C" {
#endif

/*
 * Fallbacks for essential typedefs
 */
/* typedef int pid_t; */
/* typedef unsigned int size_t; */
/* typedef unsigned int ssize_t; */
/* typedef socklen_t socklen_t; */
/* typedef int off_t; */
typedef int nfds_t;

/*
 * Extra structure definitions
 */
struct timeval;
struct timespec;

/*
 * GNU Pth indentification
 */
#define _POSIX_THREAD_IS_GNU_PTH 0x104200

/*
 * Compile time symbolic feature macros for portability
 * specification to applications using pthreads
 */
#define _POSIX_THREADS
#define _POSIX_THREAD_ATTR_STACKADDR
#define _POSIX_THREAD_ATTR_STACKSIZE
#undef  _POSIX_THREAD_PRIORITY_SCHEDULING
#undef  _POSIX_THREAD_PRIO_INHERIT
#undef  _POSIX_THREAD_PRIO_PROTECT
#undef  _POSIX_THREAD_PROCESS_SHARED
#undef  _POSIX_THREAD_SAFE_FUNCTIONS

/*
 * System call mapping support type
 * (soft variant can be overridden)
 */
#define _POSIX_THREAD_SYSCALL_HARD 0
#ifndef _POSIX_THREAD_SYSCALL_SOFT
#define _POSIX_THREAD_SYSCALL_SOFT 1
#endif

/*
 * Run-time invariant values
 */
#define PTHREAD_DESTRUCTOR_ITERATIONS  4
#define PTHREAD_KEYS_MAX               256
#define PTHREAD_STACK_MIN              8192
#define PTHREAD_THREADS_MAX            10000 /* actually yet no restriction */

/*
 * Flags for threads and thread attributes.
 */
#define PTHREAD_CREATE_DETACHED     0x01
#define PTHREAD_CREATE_JOINABLE     0x02
#define PTHREAD_SCOPE_SYSTEM        0x03
#define PTHREAD_SCOPE_PROCESS       0x04
#define PTHREAD_INHERIT_SCHED       0x05
#define PTHREAD_EXPLICIT_SCHED      0x06

/*
 * Values for cancellation
 */
#define PTHREAD_CANCEL_ENABLE        0x01
#define PTHREAD_CANCEL_DISABLE       0x02
#define PTHREAD_CANCEL_ASYNCHRONOUS  0x01
#define PTHREAD_CANCEL_DEFERRED      0x02
#define PTHREAD_CANCELED             ((void *)-1)

/*
 * Flags for mutex priority attributes
 */
#define PTHREAD_PRIO_INHERIT        0x00
#define PTHREAD_PRIO_NONE           0x01
#define PTHREAD_PRIO_PROTECT        0x02

/*
 * Flags for read/write lock attributes
 */
#define PTHREAD_PROCESS_PRIVATE     0x00
#define PTHREAD_PROCESS_SHARED      0x01

/*
 * Forward structure definitions.
 * These are mostly opaque to the application.
 */
struct pthread_st;
struct pthread_attr_st;
struct pthread_cond_st;
struct pthread_mutex_st;
struct pthread_rwlock_st;
struct sched_param;

/*
 * Primitive system data type definitions required by P1003.1c
 */
typedef struct  pthread_st              *pthread_t;
typedef struct  pthread_attr_st         *pthread_attr_t;
typedef int                              pthread_key_t;
typedef int                              pthread_once_t;
typedef int                              pthread_mutexattr_t;
typedef struct  pthread_mutex_st        *pthread_mutex_t;
typedef int                              pthread_condattr_t;
typedef struct  pthread_cond_st         *pthread_cond_t;
typedef int                              pthread_rwlockattr_t;
typedef struct  pthread_rwlock_st       *pthread_rwlock_t;

/*
 * Once support.
 */
#define PTHREAD_ONCE_INIT 0

/*
 * Mutex static initialization values.
 */
enum pthread_mutextype {
    PTHREAD_MUTEX_DEFAULT = 1,
    PTHREAD_MUTEX_RECURSIVE,
    PTHREAD_MUTEX_NORMAL,
    PTHREAD_MUTEX_ERRORCHECK
};

/*
 * Mutex/CondVar/RWLock static initialization values.
 */
#define PTHREAD_MUTEX_INITIALIZER   (pthread_mutex_t)(NULL)
#define PTHREAD_COND_INITIALIZER    (pthread_cond_t)(NULL)
#define PTHREAD_RWLOCK_INITIALIZER  (pthread_rwlock_t)(NULL)

/*
 * IEEE (``POSIX'') Std 1003.1 Second Edition 1996-07-12
 */

/* thread attribute routines */
extern int       pthread_attr_init(pthread_attr_t *);
extern int       pthread_attr_destroy(pthread_attr_t *);
extern int       pthread_attr_setinheritsched(pthread_attr_t *, int);
extern int       pthread_attr_getinheritsched(const pthread_attr_t *, int *);
extern int       pthread_attr_setschedparam(pthread_attr_t *, struct sched_param *);
extern int       pthread_attr_getschedparam(const pthread_attr_t *, struct sched_param *);
extern int       pthread_attr_setschedpolicy(pthread_attr_t *, int);
extern int       pthread_attr_getschedpolicy(const pthread_attr_t *, int *);
extern int       pthread_attr_setscope(pthread_attr_t *, int);
extern int       pthread_attr_getscope(const pthread_attr_t *, int *);
extern int       pthread_attr_setstacksize(pthread_attr_t *, size_t);
extern int       pthread_attr_getstacksize(const pthread_attr_t *, size_t *);
extern int       pthread_attr_setstackaddr(pthread_attr_t *, void *);
extern int       pthread_attr_getstackaddr(const pthread_attr_t *, void **);
extern int       pthread_attr_setdetachstate(pthread_attr_t *, int);
extern int       pthread_attr_getdetachstate(const pthread_attr_t *, int *);
extern int       pthread_attr_setguardsize(pthread_attr_t *, int);
extern int       pthread_attr_getguardsize(const pthread_attr_t *, int *);
extern int       pthread_attr_setname_np(pthread_attr_t *, char *);
extern int       pthread_attr_getname_np(const pthread_attr_t *, char **);
extern int       pthread_attr_setprio_np(pthread_attr_t *, int);
extern int       pthread_attr_getprio_np(const pthread_attr_t *, int *);

/* thread routines */
extern int       pthread_create(pthread_t *, const pthread_attr_t *, void *(*)(void *), void *);
extern int       __pthread_detach(pthread_t);
#define          pthread_detach(t) __pthread_detach(t)
extern pthread_t pthread_self(void);
extern int       pthread_equal(pthread_t, pthread_t);
extern int       pthread_yield_np(void);
extern void      pthread_exit(void *);
extern int       pthread_join(pthread_t, void **);
extern int       pthread_once(pthread_once_t *, void (*)(void));
extern int       pthread_sigmask(int, const sigset_t *, sigset_t *);
extern int       pthread_kill(pthread_t, int);

/* concurrency routines */
extern int       pthread_getconcurrency(void);
extern int       pthread_setconcurrency(int);

/* context routines */
extern int       pthread_key_create(pthread_key_t *, void (*)(void *));
extern int       pthread_key_delete(pthread_key_t);
extern int       pthread_setspecific(pthread_key_t, const void *);
extern void     *pthread_getspecific(pthread_key_t);

/* cancel routines */
extern int       pthread_cancel(pthread_t);
extern void      pthread_testcancel(void);
extern int       pthread_setcancelstate(int, int *);
extern int       pthread_setcanceltype(int, int *);

/* scheduler routines */
extern int       pthread_setschedparam(pthread_t, int, const struct sched_param *);
extern int       pthread_getschedparam(pthread_t, int *, struct sched_param *);

/* cleanup routines */
extern void      pthread_cleanup_push(void (*)(void *), void *);
extern void      pthread_cleanup_pop(int);
extern int       pthread_atfork(void (*)(void), void (*)(void), void (*)(void));

/* mutex attribute routines */
extern int       pthread_mutexattr_init(pthread_mutexattr_t *);
extern int       pthread_mutexattr_destroy(pthread_mutexattr_t *);
extern int       pthread_mutexattr_setprioceiling(pthread_mutexattr_t *, int);
extern int       pthread_mutexattr_getprioceiling(pthread_mutexattr_t *, int *);
extern int       pthread_mutexattr_setprotocol(pthread_mutexattr_t *, int);
extern int       pthread_mutexattr_getprotocol(pthread_mutexattr_t *, int *);
extern int       pthread_mutexattr_setpshared(pthread_mutexattr_t *, int);
extern int       pthread_mutexattr_getpshared(pthread_mutexattr_t *, int *);
extern int       pthread_mutexattr_settype(pthread_mutexattr_t *, int);
extern int       pthread_mutexattr_gettype(pthread_mutexattr_t *, int *);

/* mutex routines */
extern int       pthread_mutex_init(pthread_mutex_t *, const pthread_mutexattr_t *);
extern int       pthread_mutex_destroy(pthread_mutex_t *);
extern int       pthread_mutex_setprioceiling(pthread_mutex_t *, int, int *);
extern int       pthread_mutex_getprioceiling(pthread_mutex_t *, int *);
extern int       pthread_mutex_lock(pthread_mutex_t *);
extern int       pthread_mutex_trylock(pthread_mutex_t *);
extern int       pthread_mutex_unlock(pthread_mutex_t *);

/* rwlock attribute routines */
extern int       pthread_rwlockattr_init(pthread_rwlockattr_t *);
extern int       pthread_rwlockattr_destroy(pthread_rwlockattr_t *);
extern int       pthread_rwlockattr_setpshared(pthread_rwlockattr_t *, int);
extern int       pthread_rwlockattr_getpshared(const pthread_rwlockattr_t *, int *);

/* rwlock routines */
extern int       pthread_rwlock_init(pthread_rwlock_t *, const pthread_rwlockattr_t *);
extern int       pthread_rwlock_destroy(pthread_rwlock_t *);
extern int       pthread_rwlock_rdlock(pthread_rwlock_t *);
extern int       pthread_rwlock_tryrdlock(pthread_rwlock_t *);
extern int       pthread_rwlock_wrlock(pthread_rwlock_t *);
extern int       pthread_rwlock_trywrlock(pthread_rwlock_t *);
extern int       pthread_rwlock_unlock(pthread_rwlock_t *);

/* condition attribute routines */
extern int       pthread_condattr_init(pthread_condattr_t *);
extern int       pthread_condattr_destroy(pthread_condattr_t *);
extern int       pthread_condattr_setpshared(pthread_condattr_t *, int);
extern int       pthread_condattr_getpshared(pthread_condattr_t *, int *);

/* condition routines */
extern int       pthread_cond_init(pthread_cond_t *, const pthread_condattr_t *);
extern int       pthread_cond_destroy(pthread_cond_t *);
extern int       pthread_cond_broadcast(pthread_cond_t *);
extern int       pthread_cond_signal(pthread_cond_t *);
extern int       pthread_cond_wait(pthread_cond_t *, pthread_mutex_t *);
extern int       pthread_cond_timedwait(pthread_cond_t *, pthread_mutex_t *, const struct timespec *);

/*
 * Extensions created by POSIX 1003.1j
 */
extern int       pthread_abort(pthread_t);

/*
 * Optionally fake poll(2) data structure and options
 */
#if !(0)
/* use vendor poll(2) environment */
#include <poll.h>
#ifndef INFTIM
#define INFTIM (-1)
#endif
#else
/* fake a poll(2) environment */
#define POLLIN      0x0001      /* any readable data available   */
#define POLLPRI     0x0002      /* OOB/Urgent readable data      */
#define POLLOUT     0x0004      /* file descriptor is writeable  */
#define POLLERR     0x0008      /* some poll error occurred      */
#define POLLHUP     0x0010      /* file descriptor was "hung up" */
#define POLLNVAL    0x0020      /* requested events "invalid"    */
#define POLLRDNORM  POLLIN
#define POLLRDBAND  POLLIN
#define POLLWRNORM  POLLOUT
#define POLLWRBAND  POLLOUT
#ifndef INFTIM
#define INFTIM      (-1)        /* poll infinite */
#endif
struct pollfd {
    int fd;                     /* which file descriptor to poll */
    short events;               /* events we are interested in   */
    short revents;              /* events found on return        */
};
#endif

/*
 * Optionally fake readv(2)/writev(2) data structure and options
 */
#if !(0)
/* use vendor readv(2)/writev(2) environment */
#include <sys/uio.h>
#ifndef UIO_MAXIOV
#define UIO_MAXIOV 1024
#endif
#else
/* fake a readv(2)/writev(2) environment */
struct iovec {
    void  *iov_base;  /* memory base address */
    size_t iov_len;   /* memory chunk length */
};
#ifndef UIO_MAXIOV
#define UIO_MAXIOV 1024
#endif
#endif

/*
 * Replacement Functions (threading aware)
 */

extern pid_t              __pthread_fork(void);
extern unsigned int       __pthread_sleep(unsigned int);
extern int                __pthread_sigwait(const sigset_t *, int *);
extern pid_t              __pthread_waitpid(pid_t, int *, int);
extern int                __pthread_connect(int, struct sockaddr *, socklen_t);
extern int                __pthread_accept(int, struct sockaddr *, socklen_t *);
extern int                __pthread_select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
extern int                __pthread_poll(struct pollfd *, nfds_t, int);
extern ssize_t            __pthread_read(int, void *, size_t);
extern ssize_t            __pthread_write(int, const void *, size_t);
extern ssize_t            __pthread_readv(int, const struct iovec *, int);
extern ssize_t            __pthread_writev(int, const struct iovec *, int);
extern ssize_t            __pthread_recv(int, void *, size_t, int);
extern ssize_t            __pthread_send(int, const void *, size_t, int);
extern ssize_t            __pthread_recvfrom(int, void *, size_t, int, struct sockaddr *, socklen_t *);
extern ssize_t            __pthread_sendto(int, const void *, size_t, int, const struct sockaddr *, socklen_t);
extern ssize_t            __pthread_pread(int, void *, size_t, off_t);
extern ssize_t            __pthread_pwrite(int, const void *, size_t, off_t);

#if _POSIX_THREAD_SYSCALL_SOFT && !defined(_PTHREAD_PRIVATE)
#define fork       __pthread_fork
#define sleep      __pthread_sleep
#define sigwait    __pthread_sigwait
#define waitpid    __pthread_waitpid
#define connect    __pthread_connect
#define accept     __pthread_accept
#define select     __pthread_select
#define poll       __pthread_poll
#define read       __pthread_read
#define write      __pthread_write
#define readv      __pthread_readv
#define writev     __pthread_writev
#define recv       __pthread_recv
#define send       __pthread_send
#define recvfrom   __pthread_recvfrom
#define sendto     __pthread_sendto
#define pread      __pthread_pread
#define pwrite     __pthread_pwrite
#endif

/*
 * More "special" POSIX stuff
 */

#define sched_yield  pthread_yield_np

/*
 * Backward Compatibility Stuff for Pthread draft 4 (DCE threads)
 */

#ifdef _POSIX_BACKCOMPAT

#define _POSIX_THREADS_PER_THREAD_SIGNALS 1

#define pthread_attr_default       NULL
#define pthread_condattr_default   NULL
#define pthread_mutexattr_default  NULL
#define pthread_once_init          PTHREAD_ONCE_INIT

#define pthread_detach(thread)  __pthread_detach(*(thread))

#define pthread_attr_init       pthread_attr_create
#define pthread_attr_delete     pthread_attr_destroy
#define pthread_keycreate       pthread_key_create
#define pthread_yield           pthread_yield_np

#define pthread_attr_setprio    pthread_attr_setprio_np
#define pthread_attr_getprio    pthread_attr_getprio_np

#define CANCEL_ON  1
#define CANCEL_OFF 2
#define pthread_setcancel(what) \
        pthread_setcancelstate((what) == CANCEL_ON ? \
                               PTHREAD_CANCEL_ENABLE : \
                               PTHREAD_CANCEL_DISABLE)
#define pthread_setasynccancel(what) \
        pthread_setcanceltype((what) == CANCEL_ON ? \
                              PTHREAD_CANCEL_ASYNCHRONOUS : \
                              PTHREAD_CANCEL_DEFERRED)

#define pthread_setscheduler    #error
#define pthread_setprio         #error
#define pthread_attr_setsched   #error
#define pthread_attr_getsched   #error

#endif /* _POSIX_BACKCOMPAT */

#ifdef __cplusplus
}
#endif

#endif /* _PTH_PTHREAD_H_ */

