From 02ba913dc7bb5d711471b27f2ea23a897d0f2e28 Mon Sep 17 00:00:00 2001
From: lichao <lichao@aiotlink.com>
Date: 星期五, 23 四月 2021 15:34:26 +0800
Subject: [PATCH] bind msgi to shm, change offset_ptr to abs offset.
---
src/shm.cpp | 38 +++++++++++++++++++++++++++++++++++++-
1 files changed, 37 insertions(+), 1 deletions(-)
diff --git a/src/shm.cpp b/src/shm.cpp
index fd0f838..d499b16 100644
--- a/src/shm.cpp
+++ b/src/shm.cpp
@@ -18,6 +18,42 @@
#include "shm.h"
-namespace bhome_shm {
+namespace bhome_shm
+{
+bool MutexWithTimeLimit::try_lock()
+{
+ if (mutex_.try_lock()) {
+ auto old_time = last_lock_time_.load();
+ if (Now() - old_time > limit_) {
+ return last_lock_time_.compare_exchange_strong(old_time, Now());
+ } else {
+ last_lock_time_.store(Now());
+ return true;
+ }
+ } else {
+ auto old_time = last_lock_time_.load();
+ if (Now() - old_time > limit_) {
+ return last_lock_time_.compare_exchange_strong(old_time, Now());
+ } else {
+ return false;
+ }
+ }
+}
+void MutexWithTimeLimit::lock()
+{
+ while (!try_lock()) {
+ std::this_thread::yield();
+ }
+}
+
+SharedMemory::SharedMemory(const std::string &name, const uint64_t size) :
+ mshm_t(open_or_create, name.c_str(), size, 0, AllowAll()),
+ name_(name)
+{
+}
+
+SharedMemory::~SharedMemory()
+{
+}
} // namespace bhome_shm
--
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