--- a/auto/sources
+++ b/auto/sources
@@ -203,9 +203,6 @@ THREAD_POOL_SRCS="src/core/ngx_thread_po
 FREEBSD_DEPS="src/os/unix/ngx_freebsd_config.h src/os/unix/ngx_freebsd.h"
 FREEBSD_SRCS=src/os/unix/ngx_freebsd_init.c
 FREEBSD_SENDFILE_SRCS=src/os/unix/ngx_freebsd_sendfile_chain.c
-FREEBSD_RFORK_DEPS="src/os/unix/ngx_freebsd_rfork_thread.h"
-FREEBSD_RFORK_SRCS="src/os/unix/ngx_freebsd_rfork_thread.c"
-FREEBSD_RFORK_THREAD_SRCS="src/os/unix/rfork_thread.S"
 
 PTHREAD_SRCS="src/os/unix/ngx_pthread_thread.c"
 

--- a/src/os/unix/ngx_freebsd_config.h
+++ b/src/os/unix/ngx_freebsd_config.h
@@ -100,12 +100,6 @@ typedef struct aiocb  ngx_aiocb_t;
 #endif
 
 
-#if (__FreeBSD_version < 430000 || __FreeBSD_version < 500012)
-
-pid_t rfork_thread(int flags, void *stack, int (*func)(void *arg), void *arg);
-
-#endif
-
 #ifndef IOV_MAX
 #define IOV_MAX   1024
 #endif

deleted file mode 100644
--- a/src/os/unix/ngx_freebsd_rfork_thread.c
+++ /dev/null
@@ -1,756 +0,0 @@
-
-/*
- * Copyright (C) Igor Sysoev
- * Copyright (C) Nginx, Inc.
- */
-
-
-#include <ngx_config.h>
-#include <ngx_core.h>
-
-/*
- * The threads implementation uses the rfork(RFPROC|RFTHREAD|RFMEM) syscall
- * to create threads.  All threads use the stacks of the same size mmap()ed
- * below the main stack.  Thus the current thread id is determined via
- * the stack pointer value.
- *
- * The mutex implementation uses the ngx_atomic_cmp_set() operation
- * to acquire a mutex and the SysV semaphore to wait on a mutex and to wake up
- * the waiting threads.  The light mutex does not use semaphore, so after
- * spinning in the lock the thread calls sched_yield().  However the light
- * mutexes are intended to be used with the "trylock" operation only.
- * The SysV semop() is a cheap syscall, particularly if it has little sembuf's
- * and does not use SEM_UNDO.
- *
- * The condition variable implementation uses the signal #64.
- * The signal handler is SIG_IGN so the kill() is a cheap syscall.
- * The thread waits a signal in kevent().  The use of the EVFILT_SIGNAL
- * is safe since FreeBSD 4.10-STABLE.
- *
- * This threads implementation currently works on i386 (486+) and amd64
- * platforms only.
- */
-
-
-char                 *ngx_freebsd_kern_usrstack;
-size_t                ngx_thread_stack_size;
-
-
-static size_t         rz_size;
-static size_t         usable_stack_size;
-static char          *last_stack;
-
-static ngx_uint_t     nthreads;
-static ngx_uint_t     max_threads;
-
-static ngx_uint_t     nkeys;
-static ngx_tid_t     *tids;      /* the threads tids array */
-void                **ngx_tls;   /* the threads tls's array */
-
-/* the thread-safe libc errno */
-
-static int   errno0;   /* the main thread's errno */
-static int  *errnos;   /* the threads errno's array */
-
-int *
-__error()
-{
-    int  tid;
-
-    tid = ngx_gettid();
-
-    return tid ? &errnos[tid - 1] : &errno0;
-}
-
-
-/*
- * __isthreaded enables the spinlocks in some libc functions, i.e. in malloc()
- * and some other places.  Nevertheless we protect our malloc()/free() calls
- * by own mutex that is more efficient than the spinlock.
- *
- * _spinlock() is a weak referenced stub in src/lib/libc/gen/_spinlock_stub.c
- * that does nothing.
- */
-
-extern int  __isthreaded;
-
-void
-_spinlock(ngx_atomic_t *lock)
-{
-    ngx_int_t  tries;
-
-    tries = 0;
-
-    for ( ;; ) {
-
-        if (*lock) {
-            if (ngx_ncpu > 1 && tries++ < 1000) {
-                continue;
-            }
-
-            sched_yield();
-            tries = 0;
-
-        } else {
-            if (ngx_atomic_cmp_set(lock, 0, 1)) {
-                return;
-            }
-        }
-    }
-}
-
-
-/*
- * Before FreeBSD 5.1 _spinunlock() is a simple #define in
- * src/lib/libc/include/spinlock.h that zeroes lock.
- *
- * Since FreeBSD 5.1 _spinunlock() is a weak referenced stub in
- * src/lib/libc/gen/_spinlock_stub.c that does nothing.
- */
-
-#ifndef _spinunlock
-
-void
-_spinunlock(ngx_atomic_t *lock)
-{
-    *lock = 0;
-}
-
-#endif
-
-
-ngx_err_t
-ngx_create_thread(ngx_tid_t *tid, ngx_thread_value_t (*func)(void *arg),
-    void *arg, ngx_log_t *log)
-{
-    ngx_pid_t   id;
-    ngx_err_t   err;
-    char       *stack, *stack_top;
-
-    if (nthreads >= max_threads) {
-        ngx_log_error(NGX_LOG_CRIT, log, 0,
-                      "no more than %ui threads can be created", max_threads);
-        return NGX_ERROR;
-    }
-
-    last_stack -= ngx_thread_stack_size;
-
-    stack = mmap(last_stack, usable_stack_size, PROT_READ|PROT_WRITE,
-                 MAP_STACK, -1, 0);
-
-    if (stack == MAP_FAILED) {
-        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
-                      "mmap(%p:%uz, MAP_STACK) thread stack failed",
-                      last_stack, usable_stack_size);
-        return NGX_ERROR;
-    }
-
-    if (stack != last_stack) {
-        ngx_log_error(NGX_LOG_ALERT, log, 0,
-                      "stack %p address was changed to %p", last_stack, stack);
-        return NGX_ERROR;
-    }
-
-    stack_top = stack + usable_stack_size;
-
-    ngx_log_debug2(NGX_LOG_DEBUG_CORE, log, 0,
-                   "thread stack: %p-%p", stack, stack_top);
-
-    ngx_set_errno(0);
-
-    id = rfork_thread(RFPROC|RFTHREAD|RFMEM, stack_top,
-                      (ngx_rfork_thread_func_pt) func, arg);
-
-    err = ngx_errno;
-
-    if (id == -1) {
-        ngx_log_error(NGX_LOG_ALERT, log, err, "rfork() failed");
-
-    } else {
-        *tid = id;
-        nthreads = (ngx_freebsd_kern_usrstack - stack_top)
-                                                       / ngx_thread_stack_size;
-        tids[nthreads] = id;
-
-        ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0, "rfork()ed thread: %P", id);
-    }
-
-    return err;
-}
-
-
-ngx_int_t
-ngx_init_threads(int n, size_t size, ngx_cycle_t *cycle)
-{
-    char              *red_zone, *zone;
-    size_t             len;
-    ngx_int_t          i;
-    struct sigaction   sa;
-
-    max_threads = n + 1;
-
-    for (i = 0; i < n; i++) {
-        ngx_memzero(&sa, sizeof(struct sigaction));
-        sa.sa_handler = SIG_IGN;
-        sigemptyset(&sa.sa_mask);
-        if (sigaction(NGX_CV_SIGNAL, &sa, NULL) == -1) {
-            ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
-                          "sigaction(%d, SIG_IGN) failed", NGX_CV_SIGNAL);
-            return NGX_ERROR;
-        }
-    }
-
-    len = sizeof(ngx_freebsd_kern_usrstack);
-    if (sysctlbyname("kern.usrstack", &ngx_freebsd_kern_usrstack, &len,
-                                                                NULL, 0) == -1)
-    {
-        ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
-                      "sysctlbyname(kern.usrstack) failed");
-        return NGX_ERROR;
-    }
-
-    /* the main thread stack red zone */
-    rz_size = ngx_pagesize;
-    red_zone = ngx_freebsd_kern_usrstack - (size + rz_size);
-
-    ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0,
-                   "usrstack: %p red zone: %p",
-                   ngx_freebsd_kern_usrstack, red_zone);
-
-    zone = mmap(red_zone, rz_size, PROT_NONE, MAP_ANON, -1, 0);
-    if (zone == MAP_FAILED) {
-        ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
-                      "mmap(%p:%uz, PROT_NONE, MAP_ANON) red zone failed",
-                      red_zone, rz_size);
-        return NGX_ERROR;
-    }
-
-    if (zone != red_zone) {
-        ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
-                      "red zone %p address was changed to %p", red_zone, zone);
-        return NGX_ERROR;
-    }
-
-    /* create the thread errno' array */
-
-    errnos = ngx_calloc(n * sizeof(int), cycle->log);
-    if (errnos == NULL) {
-        return NGX_ERROR;
-    }
-
-    /* create the thread tids array */
-
-    tids = ngx_calloc((n + 1) * sizeof(ngx_tid_t), cycle->log);
-    if (tids == NULL) {
-        return NGX_ERROR;
-    }
-
-    tids[0] = ngx_pid;
-
-    /* create the thread tls' array */
-
-    ngx_tls = ngx_calloc(NGX_THREAD_KEYS_MAX * (n + 1) * sizeof(void *),
-                         cycle->log);
-    if (ngx_tls == NULL) {
-        return NGX_ERROR;
-    }
-
-    nthreads = 1;
-
-    last_stack = zone + rz_size;
-    usable_stack_size = size;
-    ngx_thread_stack_size = size + rz_size;
-
-    /* allow the spinlock in libc malloc() */
-    __isthreaded = 1;
-
-    ngx_threaded = 1;
-
-    return NGX_OK;
-}
-
-
-ngx_tid_t
-ngx_thread_self(void)
-{
-    ngx_int_t  tid;
-
-    tid = ngx_gettid();
-
-    if (tids == NULL) {
-        return ngx_pid;
-    }
-
-    return tids[tid];
-}
-
-
-ngx_err_t
-ngx_thread_key_create(ngx_tls_key_t *key)
-{
-    if (nkeys >= NGX_THREAD_KEYS_MAX) {
-        return NGX_ENOMEM;
-    }
-
-    *key = nkeys++;
-
-    return 0;
-}
-
-
-ngx_err_t
-ngx_thread_set_tls(ngx_tls_key_t key, void *value)
-{
-    if (key >= NGX_THREAD_KEYS_MAX) {
-        return NGX_EINVAL;
-    }
-
-    ngx_tls[key * NGX_THREAD_KEYS_MAX + ngx_gettid()] = value;
-    return 0;
-}
-
-
-ngx_mutex_t *
-ngx_mutex_init(ngx_log_t *log, ngx_uint_t flags)
-{
-    ngx_mutex_t  *m;
-    union semun   op;
-
-    m = ngx_alloc(sizeof(ngx_mutex_t), log);
-    if (m == NULL) {
-        return NULL;
-    }
-
-    m->lock = 0;
-    m->log = log;
-
-    if (flags & NGX_MUTEX_LIGHT) {
-        m->semid = -1;
-        return m;
-    }
-
-    m->semid = semget(IPC_PRIVATE, 1, SEM_R|SEM_A);
-    if (m->semid == -1) {
-        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "semget() failed");
-        return NULL;
-    }
-
-    op.val = 0;
-
-    if (semctl(m->semid, 0, SETVAL, op) == -1) {
-        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "semctl(SETVAL) failed");
-
-        if (semctl(m->semid, 0, IPC_RMID) == -1) {
-            ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
-                          "semctl(IPC_RMID) failed");
-        }
-
-        return NULL;
-    }
-
-    return m;
-}
-
-
-void
-ngx_mutex_destroy(ngx_mutex_t *m)
-{
-    if (semctl(m->semid, 0, IPC_RMID) == -1) {
-        ngx_log_error(NGX_LOG_ALERT, m->log, ngx_errno,
-                      "semctl(IPC_RMID) failed");
-    }
-
-    ngx_free((void *) m);
-}
-
-
-ngx_int_t
-ngx_mutex_dolock(ngx_mutex_t *m, ngx_int_t try)
-{
-    uint32_t       lock, old;
-    ngx_uint_t     tries;
-    struct sembuf  op;
-
-    if (!ngx_threaded) {
-        return NGX_OK;
-    }
-
-#if (NGX_DEBUG)
-    if (try) {
-        ngx_log_debug2(NGX_LOG_DEBUG_MUTEX, m->log, 0,
-                       "try lock mutex %p lock:%XD", m, m->lock);
-    } else {
-        ngx_log_debug2(NGX_LOG_DEBUG_MUTEX, m->log, 0,
-                       "lock mutex %p lock:%XD", m, m->lock);
-    }
-#endif
-
-    old = m->lock;
-    tries = 0;
-
-    for ( ;; ) {
-        if (old & NGX_MUTEX_LOCK_BUSY) {
-
-            if (try) {
-                return NGX_AGAIN;
-            }
-
-            if (ngx_ncpu > 1 && tries++ < 1000) {
-
-                /* the spinlock is used only on the SMP system */
-
-                old = m->lock;
-                continue;
-            }
-
-            if (m->semid == -1) {
-                sched_yield();
-
-                tries = 0;
-                old = m->lock;
-                continue;
-            }
-
-            ngx_log_debug2(NGX_LOG_DEBUG_MUTEX, m->log, 0,
-                           "mutex %p lock:%XD", m, m->lock);
-
-            /*
-             * The mutex is locked so we increase a number
-             * of the threads that are waiting on the mutex
-             */
-
-            lock = old + 1;
-
-            if ((lock & ~NGX_MUTEX_LOCK_BUSY) > nthreads) {
-                ngx_log_error(NGX_LOG_ALERT, m->log, ngx_errno,
-                              "%D threads wait for mutex %p, "
-                              "while only %ui threads are available",
-                              lock & ~NGX_MUTEX_LOCK_BUSY, m, nthreads);
-                ngx_abort();
-            }
-
-            if (ngx_atomic_cmp_set(&m->lock, old, lock)) {
-
-                ngx_log_debug2(NGX_LOG_DEBUG_MUTEX, m->log, 0,
-                               "wait mutex %p lock:%XD", m, m->lock);
-
-                /*
-                 * The number of the waiting threads has been increased
-                 * and we would wait on the SysV semaphore.
-                 * A semaphore should wake up us more efficiently than
-                 * a simple sched_yield() or usleep().
-                 */
-
-                op.sem_num = 0;
-                op.sem_op = -1;
-                op.sem_flg = 0;
-
-                if (semop(m->semid, &op, 1) == -1) {
-                    ngx_log_error(NGX_LOG_ALERT, m->log, ngx_errno,
-                                 "semop() failed while waiting on mutex %p", m);
-                    ngx_abort();
-                }
-
-                ngx_log_debug2(NGX_LOG_DEBUG_MUTEX, m->log, 0,
-                               "mutex waked up %p lock:%XD", m, m->lock);
-
-                tries = 0;
-                old = m->lock;
-                continue;
-            }
-
-            old = m->lock;
-
-        } else {
-            lock = old | NGX_MUTEX_LOCK_BUSY;
-
-            if (ngx_atomic_cmp_set(&m->lock, old, lock)) {
-
-                /* we locked the mutex */
-
-                break;
-            }
-
-            old = m->lock;
-        }
-
-        if (tries++ > 1000) {
-
-            ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0,
-                           "mutex %p is contested", m);
-
-            /* the mutex is probably contested so we are giving up now */
-
-            sched_yield();
-
-            tries = 0;
-            old = m->lock;
-        }
-    }
-
-    ngx_log_debug2(NGX_LOG_DEBUG_MUTEX, m->log, 0,
-                   "mutex %p is locked, lock:%XD", m, m->lock);
-
-    return NGX_OK;
-}
-
-
-void
-ngx_mutex_unlock(ngx_mutex_t *m)
-{
-    uint32_t       lock, old;
-    struct sembuf  op;
-
-    if (!ngx_threaded) {
-        return;
-    }
-
-    old = m->lock;
-
-    if (!(old & NGX_MUTEX_LOCK_BUSY)) {
-        ngx_log_error(NGX_LOG_ALERT, m->log, 0,
-                      "trying to unlock the free mutex %p", m);
-        ngx_abort();
-    }
-
-    /* free the mutex */
-
-#if 0
-    ngx_log_debug2(NGX_LOG_DEBUG_MUTEX, m->log, 0,
-                   "unlock mutex %p lock:%XD", m, old);
-#endif
-
-    for ( ;; ) {
-        lock = old & ~NGX_MUTEX_LOCK_BUSY;
-
-        if (ngx_atomic_cmp_set(&m->lock, old, lock)) {
-            break;
-        }
-
-        old = m->lock;
-    }
-
-    if (m->semid == -1) {
-        ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0,
-                       "mutex %p is unlocked", m);
-
-        return;
-    }
-
-    /* check whether we need to wake up a waiting thread */
-
-    old = m->lock;
-
-    for ( ;; ) {
-        if (old & NGX_MUTEX_LOCK_BUSY) {
-
-            /* the mutex is just locked by another thread */
-
-            break;
-        }
-
-        if (old == 0) {
-            break;
-        }
-
-        /* there are the waiting threads */
-
-        lock = old - 1;
-
-        if (ngx_atomic_cmp_set(&m->lock, old, lock)) {
-
-            /* wake up the thread that waits on semaphore */
-
-            ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0,
-                           "wake up mutex %p", m);
-
-            op.sem_num = 0;
-            op.sem_op = 1;
-            op.sem_flg = 0;
-
-            if (semop(m->semid, &op, 1) == -1) {
-                ngx_log_error(NGX_LOG_ALERT, m->log, ngx_errno,
-                              "semop() failed while waking up on mutex %p", m);
-                ngx_abort();
-            }
-
-            break;
-        }
-
-        old = m->lock;
-    }
-
-    ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0,
-                   "mutex %p is unlocked", m);
-
-    return;
-}
-
-
-ngx_cond_t *
-ngx_cond_init(ngx_log_t *log)
-{
-    ngx_cond_t  *cv;
-
-    cv = ngx_alloc(sizeof(ngx_cond_t), log);
-    if (cv == NULL) {
-        return NULL;
-    }
-
-    cv->signo = NGX_CV_SIGNAL;
-    cv->tid = -1;
-    cv->log = log;
-    cv->kq = -1;
-
-    return cv;
-}
-
-
-void
-ngx_cond_destroy(ngx_cond_t *cv)
-{
-    if (close(cv->kq) == -1) {
-        ngx_log_error(NGX_LOG_ALERT, cv->log, ngx_errno,
-                      "kqueue close() failed");
-    }
-
-    ngx_free(cv);
-}
-
-
-ngx_int_t
-ngx_cond_wait(ngx_cond_t *cv, ngx_mutex_t *m)
-{
-    int              n;
-    ngx_err_t        err;
-    struct kevent    kev;
-    struct timespec  ts;
-
-    if (cv->kq == -1) {
-
-        /*
-         * We have to add the EVFILT_SIGNAL filter in the rfork()ed thread.
-         * Otherwise the thread would not get a signal event.
-         *
-         * However, we have not to open the kqueue in the thread,
-         * it is simply handy do it together.
-         */
-
-        cv->kq = kqueue();
-        if (cv->kq == -1) {
-            ngx_log_error(NGX_LOG_ALERT, cv->log, ngx_errno, "kqueue() failed");
-            return NGX_ERROR;
-        }
-
-        ngx_log_debug2(NGX_LOG_DEBUG_CORE, cv->log, 0,
-                       "cv kq:%d signo:%d", cv->kq, cv->signo);
-
-        kev.ident = cv->signo;
-        kev.filter = EVFILT_SIGNAL;
-        kev.flags = EV_ADD;
-        kev.fflags = 0;
-        kev.data = 0;
-        kev.udata = NULL;
-
-        ts.tv_sec = 0;
-        ts.tv_nsec = 0;
-
-        if (kevent(cv->kq, &kev, 1, NULL, 0, &ts) == -1) {
-            ngx_log_error(NGX_LOG_ALERT, cv->log, ngx_errno, "kevent() failed");
-            return NGX_ERROR;
-        }
-
-        cv->tid = ngx_thread_self();
-    }
-
-    ngx_mutex_unlock(m);
-
-    ngx_log_debug3(NGX_LOG_DEBUG_CORE, cv->log, 0,
-                   "cv %p wait, kq:%d, signo:%d", cv, cv->kq, cv->signo);
-
-    for ( ;; ) {
-        n = kevent(cv->kq, NULL, 0, &kev, 1, NULL);
-
-        ngx_log_debug2(NGX_LOG_DEBUG_CORE, cv->log, 0,
-                       "cv %p kevent: %d", cv, n);
-
-        if (n == -1) {
-            err = ngx_errno;
-            ngx_log_error((err == NGX_EINTR) ? NGX_LOG_INFO : NGX_LOG_ALERT,
-                          cv->log, ngx_errno,
-                          "kevent() failed while waiting condition variable %p",
-                          cv);
-
-            if (err == NGX_EINTR) {
-                break;
-            }
-
-            return NGX_ERROR;
-        }
-
-        if (n == 0) {
-            ngx_log_error(NGX_LOG_ALERT, cv->log, 0,
-                          "kevent() returned no events "
-                          "while waiting condition variable %p",
-                          cv);
-            continue;
-        }
-
-        if (kev.filter != EVFILT_SIGNAL) {
-            ngx_log_error(NGX_LOG_ALERT, cv->log, 0,
-                          "kevent() returned unexpected events: %d "
-                          "while waiting condition variable %p",
-                          kev.filter, cv);
-            continue;
-        }
-
-        if (kev.ident != (uintptr_t) cv->signo) {
-            ngx_log_error(NGX_LOG_ALERT, cv->log, 0,
-                          "kevent() returned unexpected signal: %d ",
-                          "while waiting condition variable %p",
-                          kev.ident, cv);
-            continue;
-        }
-
-        break;
-    }
-
-    ngx_log_debug1(NGX_LOG_DEBUG_CORE, cv->log, 0, "cv %p is waked up", cv);
-
-    ngx_mutex_lock(m);
-
-    return NGX_OK;
-}
-
-
-ngx_int_t
-ngx_cond_signal(ngx_cond_t *cv)
-{
-    ngx_err_t  err;
-
-    ngx_log_debug3(NGX_LOG_DEBUG_CORE, cv->log, 0,
-                   "cv %p to signal %P %d",
-                   cv, cv->tid, cv->signo);
-
-    if (cv->tid == -1) {
-        return NGX_OK;
-    }
-
-    if (kill(cv->tid, cv->signo) == -1) {
-
-        err = ngx_errno;
-
-        ngx_log_error(NGX_LOG_ALERT, cv->log, err,
-                     "kill() failed while signaling condition variable %p", cv);
-
-        if (err == NGX_ESRCH) {
-            cv->tid = -1;
-        }
-
-        return NGX_ERROR;
-    }
-
-    ngx_log_debug1(NGX_LOG_DEBUG_CORE, cv->log, 0, "cv %p is signaled", cv);
-
-    return NGX_OK;
-}

deleted file mode 100644
--- a/src/os/unix/ngx_freebsd_rfork_thread.h
+++ /dev/null
@@ -1,122 +0,0 @@
-
-/*
- * Copyright (C) Igor Sysoev
- * Copyright (C) Nginx, Inc.
- */
-
-
-#ifndef _NGX_FREEBSD_RFORK_THREAD_H_INCLUDED_
-#define _NGX_FREEBSD_RFORK_THREAD_H_INCLUDED_
-
-
-#include <sys/ipc.h>
-#include <sys/sem.h>
-#include <sched.h>
-
-typedef pid_t  ngx_tid_t;
-
-#define ngx_log_pid    ngx_thread_self()
-#define ngx_log_tid    0
-
-#define NGX_TID_T_FMT  "%P"
-
-
-#define NGX_MUTEX_LIGHT      1
-
-#define NGX_MUTEX_LOCK_BUSY  0x80000000
-
-typedef volatile struct {
-    ngx_atomic_t  lock;
-    ngx_log_t    *log;
-    int           semid;
-} ngx_mutex_t;
-
-
-#define NGX_CV_SIGNAL        64
-
-typedef struct {
-    int           signo;
-    int           kq;
-    ngx_tid_t     tid;
-    ngx_log_t    *log;
-} ngx_cond_t;
-
-
-#define ngx_thread_sigmask(how, set, oset)                         \
-            (sigprocmask(how, set, oset) == -1) ? ngx_errno : 0
-
-#define ngx_thread_sigmask_n   "sigprocmask()"
-
-#define ngx_thread_join(t, p)
-
-#define ngx_setthrtitle(n)     setproctitle(n)
-
-
-extern char    *ngx_freebsd_kern_usrstack;
-extern size_t   ngx_thread_stack_size;
-
-
-static ngx_inline ngx_int_t
-ngx_gettid(void)
-{
-    char  *sp;
-
-    if (ngx_thread_stack_size == 0) {
-        return 0;
-    }
-
-#if ( __i386__ )
-
-    __asm__ volatile ("mov %%esp, %0" : "=q" (sp));
-
-#elif ( __amd64__ )
-
-    __asm__ volatile ("mov %%rsp, %0" : "=q" (sp));
-
-#else
-
-#error "rfork()ed threads are not supported on this platform"
-
-#endif
-
-    return (ngx_freebsd_kern_usrstack - sp) / ngx_thread_stack_size;
-}
-
-
-ngx_tid_t ngx_thread_self(void);
-
-
-typedef ngx_uint_t               ngx_tls_key_t;
-
-#define NGX_THREAD_KEYS_MAX      16
-
-extern void    **ngx_tls;
-
-ngx_err_t ngx_thread_key_create(ngx_tls_key_t *key);
-#define ngx_thread_key_create_n  "the tls key creation"
-
-ngx_err_t ngx_thread_set_tls(ngx_tls_key_t key, void *value);
-#define ngx_thread_set_tls_n     "the tls key setting"
-
-
-static void *
-ngx_thread_get_tls(ngx_tls_key_t key)
-{
-    if (key >= NGX_THREAD_KEYS_MAX) {
-        return NULL;
-    }
-
-    return ngx_tls[key * NGX_THREAD_KEYS_MAX + ngx_gettid()];
-}
-
-
-#define ngx_mutex_trylock(m)  ngx_mutex_dolock(m, 1)
-#define ngx_mutex_lock(m)     (void) ngx_mutex_dolock(m, 0)
-ngx_int_t ngx_mutex_dolock(ngx_mutex_t *m, ngx_int_t try);
-void ngx_mutex_unlock(ngx_mutex_t *m);
-
-
-typedef int (*ngx_rfork_thread_func_pt)(void *arg);
-
-
-#endif /* _NGX_FREEBSD_RFORK_THREAD_H_INCLUDED_ */

--- a/src/os/unix/ngx_thread.h
+++ b/src/os/unix/ngx_thread.h
@@ -16,12 +16,6 @@
 
 #define NGX_MAX_THREADS      128
 
-#if (NGX_USE_RFORK)
-#include <ngx_freebsd_rfork_thread.h>
-
-
-#else /* use pthreads */
-
 #include <pthread.h>
 
 typedef pthread_t                    ngx_tid_t;
@@ -70,8 +64,6 @@ ngx_int_t ngx_mutex_trylock(ngx_mutex_t 
 void ngx_mutex_lock(ngx_mutex_t *m);
 void ngx_mutex_unlock(ngx_mutex_t *m);
 
-#endif
-
 
 #define ngx_thread_volatile   volatile
 

deleted file mode 100644
--- a/src/os/unix/rfork_thread.S
+++ /dev/null
@@ -1,73 +0,0 @@
-
-/*
- * Copyright (C) Igor Sysoev
- * Copyright (C) Nginx, Inc.
- */
-
-
-#include <sys/syscall.h>
-#include <machine/asm.h>
-
-/*
- * rfork_thread(3) - rfork_thread(flags, stack, func, arg);
- */
-
-#define	KERNCALL	int $0x80
-
-ENTRY(rfork_thread)
-	push	%ebp
-	mov	%esp, %ebp
-	push	%esi
-
-	mov	12(%ebp), %esi	# the thread stack address
-
-	sub	$4, %esi
-	mov	20(%ebp), %eax	# the thread argument
-	mov	%eax, (%esi)
-
-	sub	$4, %esi
-	mov	16(%ebp), %eax	# the thread start address
-	mov	%eax, (%esi)
-
-	push	8(%ebp)		# rfork(2) flags
-	push	$0
-	mov	$SYS_rfork, %eax
-	KERNCALL
-	jc	error
-
-	cmp	$0, %edx
-	jne	child
-
-parent:
-	add	$8, %esp
-	pop	%esi
-	leave
-	ret
-
-child:
-	mov	%esi, %esp
-	pop	%eax
-	call	*%eax		# call a thread start address ...
-	add	$4, %esp
-
-	push	%eax
-	push	$0
-	mov	$SYS_exit, %eax	# ... and exit(2) after a thread would return
-	KERNCALL
-
-error:
-	add	$8, %esp
-	pop	%esi
-	leave
-	PIC_PROLOGUE
-
-	/* libc's cerror: jmp  PIC_PLT(HIDENAME(cerror)) */
-
-	push	%eax
-	call	PIC_PLT(CNAME(__error))
-	pop	%ecx
-	PIC_EPILOGUE
-	mov	%ecx, (%eax)
-	mov	$-1, %eax
-	mov	$-1, %edx
-	ret