From a04d4d01eb8e38b8ec5367114b5581bd64eee17e Mon Sep 17 00:00:00 2001
From: lichao <lichao@aiotlink.com>
Date: 星期五, 23 四月 2021 15:44:12 +0800
Subject: [PATCH] mutex unlock check timeout to avoid double unlock.
---
src/shm.cpp | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/src/shm.cpp b/src/shm.cpp
index d499b16..6d7dccd 100644
--- a/src/shm.cpp
+++ b/src/shm.cpp
@@ -46,6 +46,16 @@
std::this_thread::yield();
}
}
+void MutexWithTimeLimit::unlock()
+{
+ auto old_time = last_lock_time_.load();
+ if (Now() - old_time > limit_) {
+ } else {
+ if (last_lock_time_.compare_exchange_strong(old_time, Now())) {
+ mutex_.unlock();
+ }
+ }
+}
SharedMemory::SharedMemory(const std::string &name, const uint64_t size) :
mshm_t(open_or_create, name.c_str(), size, 0, AllowAll()),
--
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