From 34cd75f77d0ca94dbdba4e6cc9451fe4d33e78b3 Mon Sep 17 00:00:00 2001
From: lichao <lichao@aiotlink.com>
Date: 星期三, 19 五月 2021 19:14:13 +0800
Subject: [PATCH] add api BHQueryProcs.

---
 src/bh_util.h |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/bh_util.h b/src/bh_util.h
index a1c0d84..15ffeb0 100644
--- a/src/bh_util.h
+++ b/src/bh_util.h
@@ -92,6 +92,8 @@
 inline void PutInt(void *p, uint32_t u) { Put32(p, u); }
 inline void PutInt(void *p, uint64_t u) { Put64(p, u); }
 
+constexpr uint64_t MaskBits(int nbits) { return (uint64_t(1) << nbits) - 1; }
+
 class ExitCall
 {
 	typedef std::function<void(void)> func_t;
@@ -155,9 +157,9 @@
 	}
 
 protected:
-	static inline T &GetData()
+	static inline T &GetData(const std::string &msg = "Must set data before use!")
 	{
-		if (!ptr()) { throw std::string("Must set ShmMsg shm before use!"); }
+		if (!ptr()) { throw std::logic_error(msg); }
 		return *ptr();
 	}
 

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