3 files changed, 37 insertions, 6 deletions
diff --git a/src/os/unix/freebsd/ngx_rfork_thread.h b/src/os/unix/freebsd/ngx_rfork_thread.h
index bd500e1a4..2ab114e75 100644
--- a/src/os/unix/freebsd/ngx_rfork_thread.h
+++ b/src/os/unix/freebsd/ngx_rfork_thread.h
@@ -16,6 +16,7 @@ static inline ngx_tid_t ngx_gettid()
     char *sp;
 
     __asm__ ("mov %%esp,%0" : "=r" (sp));
+
     return (sp > ngx_stacks_end) ? 0:
            (sp - ngx_stacks_start) / ngx_stack_size + 1;
 }
diff --git a/src/os/unix/ngx_recv_chain.c b/src/os/unix/ngx_recv_chain.c
index de3de73dc..7a8a3b82c 100644
--- a/src/os/unix/ngx_recv_chain.c
+++ b/src/os/unix/ngx_recv_chain.c
@@ -6,20 +6,20 @@
 #include <ngx_connection.h>
 
 
-ssize_t ngx_recv_chain(ngx_connection_t *c, ngx_chain_t *ce)
+ssize_t ngx_recv_chain(ngx_connection_t *c, ngx_chain_t *entry)
 {
-    ssize_t         n;
+    ssize_t        n;
     struct iovec  *iov;
     ngx_err_t      err;
     ngx_array_t    io;
 
     ngx_init_array(io, c->pool, 10, sizeof(struct iovec), NGX_ERROR);
 
-    while (ce) {
+    while (entry) {
         ngx_test_null(iov, ngx_push_array(&io), NGX_ERROR);
-        iov->iov_base = ce->hunk->pos;
-        iov->iov_len = ce->hunk->end - ce->hunk->last;
-        ce = ce->next;
+        iov->iov_base = entry->hunk->pos;
+        iov->iov_len = entry->hunk->end - entry->hunk->last;
+        entry = entry->next;
     }
 
 ngx_log_debug(c->log, "recv: %d:%d" _ io.nelts _ iov->iov_len);
diff --git a/src/os/unix/ngx_x86_mutex.h b/src/os/unix/ngx_x86_mutex.h
new file mode 100644
index 000000000..a8ed2eee2
--- /dev/null
+++ b/src/os/unix/ngx_x86_mutex.h
@@ -0,0 +1,30 @@
+
+
+typedef struct {
+    int  lock;
+} ngx_mutex_t;
+
+
+static inline int ngx_spin_lock(ngx_mutex_t *m, int count)
+{
+    int  lock;
+
+    __asm__ __volatile("
+
+get_lock:
+        mov   $1, %1
+        xchg  %1, %2
+        cmp   $0, %1
+        jne   spin_lock
+
+spin_lock:
+        cmp   $0, %3
+        je    failed
+
+        dec   %3
+        rep   nop
+        cmp   $0, %2
+        jne   spin_lock
+
+    ": "=q" (lock), "m" (m->lock), "q" (count));
+}