Initial version.

src/nxt_vector.h

@@ -0,0 +1,69 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ * Copyright (C) NGINX, Inc.
+ */
+
+#ifndef _NXT_VECTOR_H_INCLUDED_
+#define _NXT_VECTOR_H_INCLUDED_
+
+
+typedef enum {
+    NXT_VECTOR_INITED = 0,
+    NXT_VECTOR_DESCRETE,
+    NXT_VECTOR_EMBEDDED,
+} nxt_vector_type_t;
+
+
+typedef struct {
+    void               *start;
+    /*
+     * A vector can hold no more than 65536 items.
+     * The item size is no more than 64K.
+     */
+    uint16_t           items;
+    uint16_t           avalaible;
+    uint16_t           item_size;
+    nxt_vector_type_t  type:8;
+} nxt_vector_t;
+
+
+NXT_EXPORT nxt_vector_t *nxt_vector_create(nxt_uint_t items, size_t item_size,
+    const nxt_mem_proto_t *proto, void *pool);
+NXT_EXPORT void *nxt_vector_init(nxt_vector_t *vector, nxt_uint_t items,
+    size_t item_size, const nxt_mem_proto_t *proto, void *pool);
+NXT_EXPORT void nxt_vector_destroy(nxt_vector_t *vector,
+    const nxt_mem_proto_t *proto, void *pool);
+NXT_EXPORT void *nxt_vector_add(nxt_vector_t *vector,
+    const nxt_mem_proto_t *proto, void *pool);
+NXT_EXPORT void *nxt_vector_zero_add(nxt_vector_t *vector,
+    const nxt_mem_proto_t *proto, void *pool);
+NXT_EXPORT void nxt_vector_remove(nxt_vector_t *vector, void *item);
+
+
+#define                                                                       \
+nxt_vector_last(vector)                                                       \
+    ((void *)                                                                 \
+        ((char *) (vector)->start                                             \
+                      + (vector)->item_size * ((vector)->items - 1)))
+
+
+#define                                                                       \
+nxt_vector_reset(vector)                                                      \
+    (vector)->items = 0;
+
+
+#define                                                                       \
+nxt_vector_is_empty(vector)                                                   \
+    ((vector)->items == 0)
+
+
+nxt_inline void *
+nxt_vector_remove_last(nxt_vector_t *vector)
+{
+    vector->items--;
+    return (char *) vector->start + vector->item_size * vector->items;
+}
+
+
+#endif /* _NXT_VECTOR_H_INCLUDED_ */