2 files changed, 88 insertions, 0 deletions
diff --git a/src/os/freebsd/ngx_os_thread.c b/src/os/freebsd/ngx_os_thread.c
new file mode 100644
index 000000000..f40956e20
--- /dev/null
+++ b/src/os/freebsd/ngx_os_thread.c
@@ -0,0 +1,64 @@
+
+#include <ngx_os_thread.h>
+
+char    *ngx_stacks_start;
+char    *ngx_stacks_end;
+size_t   ngx_stack_size;
+
+
+/* handle thread-safe errno */
+static int   errno0; /* errno for main thread */
+static int  *errnos;
+
+int *__error()
+{
+    ngx_tid_t tid = ngx_gettid();
+    return tid ? &(errnos[ngx_gettid()]) : &errno0;
+}
+
+
+int ngx_create_os_thread(ngx_os_tid_t *tid, void *stack,
+                     int (*func)(void *arg), void *arg, ngx_log_t log)
+{
+    int id, err;
+
+    id = rfork_thread(RFPROC|RFMEM, stack, func, arg);
+    err = ngx_errno;
+
+    if (id == -1)
+        ngx_log_error(NGX_LOG_ERR, log, err,
+                      "ngx_create_os_thread: rfork failed");
+    else
+        *tid = id;
+
+    return err;
+}
+
+
+int ngx_create_os_thread_env(int n, size_t size, ngx_log_t log)
+{
+    char *addr;
+
+    /* create thread stacks */
+    addr = mmap(NULL, n * size, PROT_READ|PROT_WRITE, MAP_ANON, -1, NULL);
+    if (addr == MAP_FAILED) {
+        ngx_log_error(NGX_LOG_ERR, log, ngx_errno,
+                      "ngx_create_os_thread_stacks: mmap failed");
+        return -1;
+    }
+
+    nxg_stacks_start = addr;
+    nxg_stacks_end = addr + n * size;
+    nxg_stack_size = size;
+
+    /* create thread errno array */
+    ngx_test_null(errnos, ngx_calloc(n * sizeof(int)), -1);
+
+    /* create thread tid array */
+    ngx_test_null(ngx_os_tids, ngx_calloc(n * sizeof(ngx_os_tid_t)), -1);
+
+    /* allow spinlock in malloc() */
+    __isthreaded = 1;
+
+    return 0;
+}
diff --git a/src/os/freebsd/ngx_os_thread.h b/src/os/freebsd/ngx_os_thread.h
new file mode 100644
index 000000000..bd500e1a4
--- /dev/null
+++ b/src/os/freebsd/ngx_os_thread.h
@@ -0,0 +1,24 @@
+#ifndef _NGX_OS_THREAD_H_INCLUDED_
+#define _NGX_OS_THREAD_H_INCLUDED_
+
+
+typedef int  ngx_os_tid_t;
+typedef int  ngx_tid_t;
+
+
+extern char   *ngx_stacks_start;
+extern char   *ngx_stacks_end;
+extern size_t  ngx_stack_size;
+
+
+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;
+}
+
+
+#endif /* _NGX_OS_THREAD_H_INCLUDED_ */