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_nspr_pthread.h

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the Netscape Portable Runtime (NSPR).
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998-2000
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#ifndef nspr_pthread_defs_h___
#define nspr_pthread_defs_h___

#include <pthread.h>
#include "prthread.h"

#if defined(PTHREADS_USER)
/*
** Thread Local Storage 
*/
extern pthread_key_t current_thread_key;
extern pthread_key_t current_cpu_key;
extern pthread_key_t last_thread_key;
extern pthread_key_t intsoff_key;

#define _MD_CURRENT_THREAD()              \
                  ((struct PRThread *) pthread_getspecific(current_thread_key))
#define _MD_CURRENT_CPU()                       \
                  ((struct _PRCPU *) pthread_getspecific(current_cpu_key))
#define _MD_LAST_THREAD()                       \
                  ((struct PRThread *) pthread_getspecific(last_thread_key))
      
#define _MD_SET_CURRENT_THREAD(newval)                \
      pthread_setspecific(current_thread_key, (void *)newval)

#define _MD_SET_CURRENT_CPU(newval)                   \
      pthread_setspecific(current_cpu_key, (void *)newval)

#define _MD_SET_LAST_THREAD(newval)                   \
      pthread_setspecific(last_thread_key, (void *)newval)

#define _MD_SET_INTSOFF(_val)
#define _MD_GET_INTSOFF()     1
      
/*
** Initialize the thread context preparing it to execute _main.
*/
#define _MD_INIT_CONTEXT(_thread, _sp, _main, status)             \
    PR_BEGIN_MACRO                                                                        \
        *status = PR_TRUE;                                              \
            if (SAVE_CONTEXT(_thread)) {                                      \
            (*_main)();                                                             \
            }                                                                                   \
            _MD_SET_THR_SP(_thread, _sp);                                     \
            _thread->no_sched = 0;                                                  \
    PR_END_MACRO

#define _MD_SWITCH_CONTEXT(_thread)                                                 \
    PR_BEGIN_MACRO                                                                              \
      PR_ASSERT(_thread->no_sched);                                                 \
      if (!SAVE_CONTEXT(_thread)) {                                                 \
            (_thread)->md.errcode = errno;                                          \
            _MD_SET_LAST_THREAD(_thread);                                           \
            _PR_Schedule();                                                               \
    } else {                                                                                    \
             (_MD_LAST_THREAD())->no_sched = 0;                                     \
      }                                                                                               \
    PR_END_MACRO

/*
** Restore a thread context, saved by _MD_SWITCH_CONTEXT
*/
#define _MD_RESTORE_CONTEXT(_thread)                                                \
    PR_BEGIN_MACRO                                                                              \
    errno = (_thread)->md.errcode;                                                  \
    _MD_SET_CURRENT_THREAD(_thread);                                                \
      _thread->no_sched = 1;                                                              \
    GOTO_CONTEXT(_thread);                                                                \
    PR_END_MACRO


/* Machine-dependent (MD) data structures */

struct _MDThread {
    jmp_buf             jb;
    int                       id;
    int                       errcode;
      pthread_t         pthread;
      pthread_mutex_t   pthread_mutex;
      pthread_cond_t    pthread_cond;
      int                     wait;
};

struct _MDThreadStack {
    PRInt8 notused;
};

struct _MDLock {
      pthread_mutex_t mutex;
};

struct _MDSemaphore {
    PRInt8 notused;
};

struct _MDCVar {
      pthread_mutex_t mutex;
};

struct _MDSegment {
    PRInt8 notused;
};

/*
 * md-specific cpu structure field
 */
#define _PR_MD_MAX_OSFD FD_SETSIZE

struct _MDCPU_Unix {
    PRCList ioQ;
    PRUint32 ioq_timeout;
    PRInt32 ioq_max_osfd;
    PRInt32 ioq_osfd_cnt;
#ifndef _PR_USE_POLL
    fd_set fd_read_set, fd_write_set, fd_exception_set;
    PRInt16 fd_read_cnt[_PR_MD_MAX_OSFD],fd_write_cnt[_PR_MD_MAX_OSFD],
                        fd_exception_cnt[_PR_MD_MAX_OSFD];
#else
      struct pollfd *ioq_pollfds;
      int ioq_pollfds_size;
#endif      /* _PR_USE_POLL */
};

#define _PR_IOQ(_cpu)               ((_cpu)->md.md_unix.ioQ)
#define _PR_ADD_TO_IOQ(_pq, _cpu) PR_APPEND_LINK(&_pq.links, &_PR_IOQ(_cpu))
#define _PR_FD_READ_SET(_cpu)       ((_cpu)->md.md_unix.fd_read_set)
#define _PR_FD_READ_CNT(_cpu)       ((_cpu)->md.md_unix.fd_read_cnt)
#define _PR_FD_WRITE_SET(_cpu)            ((_cpu)->md.md_unix.fd_write_set)
#define _PR_FD_WRITE_CNT(_cpu)            ((_cpu)->md.md_unix.fd_write_cnt)
#define _PR_FD_EXCEPTION_SET(_cpu)  ((_cpu)->md.md_unix.fd_exception_set)
#define _PR_FD_EXCEPTION_CNT(_cpu)  ((_cpu)->md.md_unix.fd_exception_cnt)
#define _PR_IOQ_TIMEOUT(_cpu)       ((_cpu)->md.md_unix.ioq_timeout)
#define _PR_IOQ_MAX_OSFD(_cpu)            ((_cpu)->md.md_unix.ioq_max_osfd)
#define _PR_IOQ_OSFD_CNT(_cpu)            ((_cpu)->md.md_unix.ioq_osfd_cnt)
#define _PR_IOQ_POLLFDS(_cpu)       ((_cpu)->md.md_unix.ioq_pollfds)
#define _PR_IOQ_POLLFDS_SIZE(_cpu)  ((_cpu)->md.md_unix.ioq_pollfds_size)

#define _PR_IOQ_MIN_POLLFDS_SIZE(_cpu)    32

struct _MDCPU {
    jmp_buf                   jb;
      pthread_t               pthread;
      struct _MDCPU_Unix      md_unix;
};

/*
#define _MD_NEW_LOCK(lock) PR_SUCCESS
#define _MD_FREE_LOCK(lock)
#define _MD_LOCK(lock)
#define _MD_UNLOCK(lock)
*/

extern pthread_mutex_t _pr_heapLock;

#define _PR_LOCK(lock) pthread_mutex_lock(lock)

#define _PR_UNLOCK(lock) pthread_mutex_unlock(lock)


#define _PR_LOCK_HEAP() {                                                     \
                        if (_pr_primordialCPU) {                              \
                              _PR_LOCK(_pr_heapLock);                         \
                        }

#define _PR_UNLOCK_HEAP()     if (_pr_primordialCPU)  {           \
                              _PR_UNLOCK(_pr_heapLock);                       \
                        }                                                                 \
                    }

NSPR_API(PRStatus) _MD_NEW_LOCK(struct _MDLock *md);
NSPR_API(void) _MD_FREE_LOCK(struct _MDLock *lockp);

#define _MD_LOCK(_lockp) _PR_LOCK(&(_lockp)->mutex)
#define _MD_UNLOCK(_lockp) _PR_UNLOCK(&(_lockp)->mutex)

#define _MD_INIT_IO()
#define _MD_IOQ_LOCK()
#define _MD_IOQ_UNLOCK()
#define _MD_CHECK_FOR_EXIT()

NSPR_API(PRStatus) _MD_InitThread(struct PRThread *thread);
#define _MD_INIT_THREAD _MD_InitThread
#define _MD_INIT_ATTACHED_THREAD _MD_InitThread

NSPR_API(void) _MD_ExitThread(struct PRThread *thread);
#define _MD_EXIT_THREAD _MD_ExitThread

NSPR_API(void) _MD_SuspendThread(struct PRThread *thread);
#define _MD_SUSPEND_THREAD _MD_SuspendThread

NSPR_API(void) _MD_ResumeThread(struct PRThread *thread);
#define _MD_RESUME_THREAD _MD_ResumeThread

NSPR_API(void) _MD_SuspendCPU(struct _PRCPU *thread);
#define _MD_SUSPEND_CPU _MD_SuspendCPU

NSPR_API(void) _MD_ResumeCPU(struct _PRCPU *thread);
#define _MD_RESUME_CPU _MD_ResumeCPU

#define _MD_BEGIN_SUSPEND_ALL()
#define _MD_END_SUSPEND_ALL()
#define _MD_BEGIN_RESUME_ALL()
#define _MD_END_RESUME_ALL()

NSPR_API(void) _MD_EarlyInit(void);
#define _MD_EARLY_INIT _MD_EarlyInit

#define _MD_FINAL_INIT _PR_UnixInit

NSPR_API(void) _MD_InitLocks(void);
#define _MD_INIT_LOCKS _MD_InitLocks

NSPR_API(void) _MD_CleanThread(struct PRThread *thread);
#define _MD_CLEAN_THREAD _MD_CleanThread

NSPR_API(PRStatus) _MD_CreateThread(
                        struct PRThread *thread,
                        void (*start) (void *),
                        PRThreadPriority priority,
                        PRThreadScope scope,
                        PRThreadState state,
                        PRUint32 stackSize);
#define _MD_CREATE_THREAD _MD_CreateThread

extern void _MD_CleanupBeforeExit(void);
#define _MD_CLEANUP_BEFORE_EXIT _MD_CleanupBeforeExit

NSPR_API(void) _MD_InitRunningCPU(struct _PRCPU *cpu);
#define    _MD_INIT_RUNNING_CPU _MD_InitRunningCPU

/* The _PR_MD_WAIT_LOCK and _PR_MD_WAKEUP_WAITER functions put to sleep and
 * awaken a thread which is waiting on a lock or cvar.
 */
NSPR_API(PRStatus) _MD_wait(struct PRThread *, PRIntervalTime timeout);
#define _MD_WAIT _MD_wait

NSPR_API(PRStatus) _MD_WakeupWaiter(struct PRThread *);
#define _MD_WAKEUP_WAITER _MD_WakeupWaiter

NSPR_API(void) _MD_SetPriority(struct _MDThread *thread,
      PRThreadPriority newPri);
#define _MD_SET_PRIORITY _MD_SetPriority

#endif /* PTHREADS_USER */

#endif /* nspr_pthread_defs_h___ */

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