From 0cb78fd33218405824bd5843ae79386ab1c5140f Mon Sep 17 00:00:00 2001
From: cfdaily <cfdaily@gitee.com>
Date: Sun, 17 May 2026 06:01:35 +0800
Subject: [PATCH] auto-sync: 2026-05-17 06:01:35

---
 src/daemon/counter.py | 71 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 src/daemon/counter.py

diff --git a/src/daemon/counter.py b/src/daemon/counter.py
new file mode 100644
index 0000000..2409c26
--- /dev/null
+++ b/src/daemon/counter.py
@@ -0,0 +1,71 @@
+"""ActiveAgentCounter — 并发控制
+
+全局上限 + per-agent 串行，asyncio Semaphore 实现。
+"""
+
+from __future__ import annotations
+
+import asyncio
+import logging
+from typing import Dict, Optional
+
+logger = logging.getLogger("moziplus-v2.counter")
+
+
+class ActiveAgentCounter:
+    """异步并发计数器"""
+
+    def __init__(self, max_global: int = 5, max_per_agent: int = 1):
+        self._max_global = max_global
+        self._max_per_agent = max_per_agent
+        self._global_sem = asyncio.Semaphore(max_global)
+        self._per_agent: Dict[str, asyncio.Semaphore] = {}
+        self._active: Dict[str, int] = {}  # agent_id → count
+        self._global_active: int = 0
+
+    async def can_acquire(self, agent_id: str) -> bool:
+        """检查是否可以获取（不实际获取）"""
+        if self._global_active >= self._max_global:
+            return False
+        active = self._active.get(agent_id, 0)
+        if active >= self._max_per_agent:
+            return False
+        return True
+
+    async def acquire(self, agent_id: str) -> bool:
+        """获取一个 slot
+
+        Returns:
+            True if acquired, False if would block
+        """
+        if not await self.can_acquire(agent_id):
+            return False
+
+        await self._global_sem.acquire()
+
+        if agent_id not in self._per_agent:
+            self._per_agent[agent_id] = asyncio.Semaphore(self._max_per_agent)
+        await self._per_agent[agent_id].acquire()
+
+        self._global_active += 1
+        self._active[agent_id] = self._active.get(agent_id, 0) + 1
+        return True
+
+    def release(self, agent_id: str) -> None:
+        """释放一个 slot"""
+        if agent_id in self._per_agent:
+            self._per_agent[agent_id].release()
+        self._global_sem.release()
+        self._global_active = max(0, self._global_active - 1)
+        if agent_id in self._active:
+            self._active[agent_id] = max(0, self._active[agent_id] - 1)
+            if self._active[agent_id] == 0:
+                del self._active[agent_id]
+
+    @property
+    def global_active(self) -> int:
+        return self._global_active
+
+    @property
+    def active_agents(self) -> Dict[str, int]:
+        return dict(self._active)