update shared memory pool api

src/Interface/Model/Pool.php

@@ -14,18 +14,37 @@ interface Pool
         ?string $namespace = null
     );
 
+    public function init(
+        string $key,
+        int $size = 0xfffff,
+        string $flags = 'c',
+        int $mode = 0644,
+    ): ?\Shmop;
+
+    public function read(
+        string $key,
+        int $start = 0,
+        int $count = 0
+    ): ?string;
+
+    public function write(
+        string $key,
+        string $value,
+        int $offset = 0
+    ): int;
+
+    public function delete(
+        string $key
+    ): bool;
+
     public function get(
         string $key
-    ): ?string;
+    ): string;
 
     public function set(
         string $key,
-        ?string $value = null,
-        string $flags = 'c',
-        int $offset = 0,
-        int $mode = 0644,
-        ?string $encoding = null
-    ): int;
+        ?string $value = null
+    ): void;
 
     public function reset(): void;
 }