support attaching to an existent Win32 shared memory

1 files changed, 8 insertions, 0 deletions

diff --git a/src/http/modules/ngx_http_limit_zone_module.c b/src/http/modules/ngx_http_limit_zone_module.c
index b32c3da0e..e11e0815b 100644
--- a/src/http/modules/ngx_http_limit_zone_module.c
+++ b/src/http/modules/ngx_http_limit_zone_module.c
@@ -339,11 +339,19 @@ ngx_http_limit_zone_init_zone(ngx_shm_zone_t *shm_zone, void *data)
 
     shpool = (ngx_slab_pool_t *) shm_zone->shm.addr;
 
+    if (shm_zone->shm.exists) {
+        ctx->rbtree = shpool->data;
+
+        return NGX_OK;
+    }
+
     ctx->rbtree = ngx_slab_alloc(shpool, sizeof(ngx_rbtree_t));
     if (ctx->rbtree == NULL) {
         return NGX_ERROR;
     }
 
+    shpool->data = ctx->rbtree;
+
     sentinel = ngx_slab_alloc(shpool, sizeof(ngx_rbtree_node_t));
     if (sentinel == NULL) {
         return NGX_ERROR;