palemoon-dev/platform/nsprpub/pr/include/md/_nspr_pthread.h

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#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___ */