1 files changed, 70 insertions, 0 deletions
diff --git a/src/core/ngx_shmtx.c b/src/core/ngx_shmtx.c
new file mode 100644
index 000000000..ac8a30010
--- /dev/null
+++ b/src/core/ngx_shmtx.c
@@ -0,0 +1,70 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ */
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+
+
+#if (NGX_HAVE_ATOMIC_OPS)
+
+
+ngx_int_t
+ngx_shmtx_create(ngx_shmtx_t *mtx, void *addr, u_char *name, ngx_log_t *log)
+{
+    mtx->lock = addr;
+
+    return NGX_OK;
+}
+
+#else
+
+
+ngx_int_t
+ngx_shmtx_create(ngx_shmtx_t *mtx, void *addr, u_char *name, ngx_log_t *log)
+{
+    if (mtx->name) {
+
+        if (ngx_strcmp(name, mtx->name) == 0) {
+            mtx->name = name;
+            mtx->log = log;
+
+            return NGX_OK;
+        }
+
+        ngx_shmtx_destory(mtx);
+    }
+
+    mtx->fd = ngx_open_file(name, NGX_FILE_RDWR, NGX_FILE_CREATE_OR_OPEN);
+
+    if (mtx->fd == NGX_INVALID_FILE) {
+        ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
+                      ngx_open_file_n " \"%s\" failed", name);
+        return NGX_ERROR;
+    }
+
+    if (ngx_delete_file(name) == NGX_FILE_ERROR) {
+        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
+                      ngx_delete_file_n " \"%s\" failed", name);
+    }
+
+    mtx->name = name;
+    mtx->log = log;
+
+    return NGX_OK;
+}
+
+
+void
+ngx_shmtx_destory(ngx_shmtx_t *mtx)
+{
+    if (ngx_close_file(mtx->fd) == NGX_FILE_ERROR) {
+        ngx_log_error(NGX_LOG_ALERT, mtx->log, ngx_errno,
+                      ngx_close_file_n " \"%s\" failed", mtx->name);
+    }
+}
+
+
+#endif